Add regression test for issue 138.

Update README.md

CMakeLists.txt

@@ -2,60 +2,145 @@
 #This configures the Cmake system with multiple properties, depending
 #on the platform and configuration it is set to build in.
 project(tinyobjloader)
-cmake_minimum_required(VERSION 2.8.6)
+cmake_minimum_required(VERSION 2.8.11)
+set(TINYOBJLOADER_SOVERSION 1)
+set(TINYOBJLOADER_VERSION 1.0.4)
+
+#optional double precision support
+option(TINYOBJLOADER_USE_DOUBLE "Build library with double precision instead of single (float)" OFF)
+
+if(TINYOBJLOADER_USE_DOUBLE)
+  add_definitions(-DTINYOBJLOADER_USE_DOUBLE)
+  set(LIBRARY_NAME ${PROJECT_NAME}_double)
+else()
+  set(LIBRARY_NAME ${PROJECT_NAME})
+endif()
+
 
 #Folder Shortcuts
 set(TINYOBJLOADEREXAMPLES_DIR ${CMAKE_CURRENT_SOURCE_DIR}/examples)
 
 set(tinyobjloader-Source
-	${CMAKE_CURRENT_SOURCE_DIR}/tiny_obj_loader.h
+  ${CMAKE_CURRENT_SOURCE_DIR}/tiny_obj_loader.h
-	${CMAKE_CURRENT_SOURCE_DIR}/tiny_obj_loader.cc
+  ${CMAKE_CURRENT_SOURCE_DIR}/tiny_obj_loader.cc
-	)
+  )
 
 set(tinyobjloader-Example-Source
-	${CMAKE_CURRENT_SOURCE_DIR}/loader_example.cc
+  ${CMAKE_CURRENT_SOURCE_DIR}/loader_example.cc
-	)
+  )
 
 set(tinyobjloader-examples-objsticher
-	${TINYOBJLOADEREXAMPLES_DIR}/obj_sticher/obj_writer.h
+  ${TINYOBJLOADEREXAMPLES_DIR}/obj_sticher/obj_writer.h
-	${TINYOBJLOADEREXAMPLES_DIR}/obj_sticher/obj_writer.cc
+  ${TINYOBJLOADEREXAMPLES_DIR}/obj_sticher/obj_writer.cc
-	${TINYOBJLOADEREXAMPLES_DIR}/obj_sticher/obj_sticher.cc
+  ${TINYOBJLOADEREXAMPLES_DIR}/obj_sticher/obj_sticher.cc
-	)
+  )
+
+#Install destinations
+include(GNUInstallDirs)
+
+set(TINYOBJLOADER_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}/cmake)
+set(TINYOBJLOADER_DOC_DIR ${CMAKE_INSTALL_DOCDIR})
+set(TINYOBJLOADER_INCLUDE_DIR ${CMAKE_INSTALL_INCLUDEDIR})
+set(TINYOBJLOADER_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR})
+set(TINYOBJLOADER_PKGCONFIG_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+set(TINYOBJLOADER_RUNTIME_DIR ${CMAKE_INSTALL_BINDIR})
 
 option(TINYOBJLOADER_BUILD_TEST_LOADER "Build Example Loader Application" OFF)
 option(TINYOBJLOADER_COMPILATION_SHARED "Build as shared library" OFF)
 
-if (TINYOBJLOADER_COMPILATION_SHARED)
+if(TINYOBJLOADER_COMPILATION_SHARED)
-	add_library(tinyobjloader SHARED ${tinyobjloader-Source})
+  add_library(${LIBRARY_NAME} SHARED ${tinyobjloader-Source})
+  set_target_properties(${LIBRARY_NAME} PROPERTIES
+    SOVERSION ${TINYOBJLOADER_SOVERSION}
+  )
 else()
-	add_library(tinyobjloader STATIC ${tinyobjloader-Source})
+  add_library(${LIBRARY_NAME} STATIC ${tinyobjloader-Source})
 endif()
 
+set_target_properties(${LIBRARY_NAME} PROPERTIES VERSION ${TINYOBJLOADER_VERSION})
+
+target_include_directories(${LIBRARY_NAME} INTERFACE
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+  $<INSTALL_INTERFACE:${TINYOBJLOADER_INCLUDE_DIR}>
+  )
+
+export(TARGETS ${LIBRARY_NAME} FILE ${PROJECT_NAME}-targets.cmake)
+
 if(TINYOBJLOADER_BUILD_TEST_LOADER)
   add_executable(test_loader ${tinyobjloader-Example-Source})
-  target_link_libraries(test_loader tinyobjloader)
+  target_link_libraries(test_loader ${LIBRARY_NAME})
 endif()
 
 option(TINYOBJLOADER_BUILD_OBJ_STICHER "Build OBJ Sticher Application" OFF)
-if (TINYOBJLOADER_BUILD_OBJ_STICHER)
+if(TINYOBJLOADER_BUILD_OBJ_STICHER)
   add_executable(obj_sticher ${tinyobjloader-examples-objsticher})
-  target_link_libraries(obj_sticher tinyobjloader)
+  target_link_libraries(obj_sticher ${LIBRARY_NAME})
 
-  install ( TARGETS
+  install(TARGETS
     obj_sticher
     DESTINATION
-    bin
+    ${TINYOBJLOADER_RUNTIME_DIR}
     )
 endif()
 
-#Installation
+#Write CMake package config files
-install ( TARGETS
+include(CMakePackageConfigHelpers)
-  tinyobjloader
+
-  DESTINATION
+configure_package_config_file(
-  lib
+  ${PROJECT_NAME}-config.cmake.in
+  ${LIBRARY_NAME}-config.cmake
+  INSTALL_DESTINATION
+  ${TINYOBJLOADER_CMAKE_DIR}
+  PATH_VARS
+  TINYOBJLOADER_INCLUDE_DIR
+  TINYOBJLOADER_LIBRARY_DIR
+  NO_CHECK_REQUIRED_COMPONENTS_MACRO
   )
-install ( FILES
+
+write_basic_package_version_file(${LIBRARY_NAME}-config-version.cmake
+  VERSION
+  ${TINYOBJLOADER_VERSION}
+  COMPATIBILITY
+  SameMajorVersion
+  )
+
+#pkg-config file
+configure_file(${PROJECT_NAME}.pc.in ${LIBRARY_NAME}.pc @ONLY)
+
+#Installation
+install(TARGETS
+  ${LIBRARY_NAME}
+  EXPORT ${PROJECT_NAME}-targets
+  DESTINATION
+  ${TINYOBJLOADER_LIBRARY_DIR}
+  PUBLIC_HEADER DESTINATION
+  ${TINYOBJLOADER_INCLUDE_DIR}
+  RUNTIME DESTINATION
+  ${TINYOBJLOADER_RUNTIME_DIR}
+  )
+install(EXPORT
+  ${PROJECT_NAME}-targets
+  DESTINATION
+  ${TINYOBJLOADER_CMAKE_DIR}
+  )
+install(FILES
   tiny_obj_loader.h
   DESTINATION
-  include
+  ${TINYOBJLOADER_INCLUDE_DIR}
+  )
+install(FILES
+  LICENSE
+  DESTINATION
+  ${TINYOBJLOADER_DOC_DIR}
+  )
+install(FILES
+  "${CMAKE_CURRENT_BINARY_DIR}/${LIBRARY_NAME}-config.cmake"
+  "${CMAKE_CURRENT_BINARY_DIR}/${LIBRARY_NAME}-config-version.cmake"
+  DESTINATION
+  ${TINYOBJLOADER_CMAKE_DIR}
+  )
+install(FILES
+  "${CMAKE_CURRENT_BINARY_DIR}/${LIBRARY_NAME}.pc"
+  DESTINATION
+  ${TINYOBJLOADER_PKGCONFIG_DIR}
   )

LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2012-2016 Syoyo Fujita and many contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

@@ -12,7 +12,7 @@
 
 http://syoyo.github.io/tinyobjloader/
 
-Tiny but powerful single file wavefront obj loader written in C++. No dependency except for C++ STL. It can parse 10M over polygons with moderate memory and time.
+Tiny but powerful single file wavefront obj loader written in C++. No dependency except for C++ STL. It can parse over 10M polygons with moderate memory and time.
 
 `tinyobjloader` is good for embedding .obj loader to your (global illumination) renderer ;-)
 
@@ -26,7 +26,7 @@ Old version is available `v0.9.x` branch https://github.com/syoyo/tinyobjloader/
 
 ## What's new
 
-* 20 Aug, 2016 : Bump version v1.0.0. New data strcutre and API!
+* 20 Aug, 2016 : Bump version v1.0.0. New data structure and API!
 
 ### Old version
 
@@ -37,7 +37,7 @@ Previous old version is avaiable in `v0.9.x` branch.
 ![Rungholt](images/rungholt.jpg)
 
 tinyobjloader can successfully load 6M triangles Rungholt scene.
-http://graphics.cs.williams.edu/data/meshes.xml
+http://casual-effects.com/data/index.html
 
 ![](images/sanmugel.png) 
 
@@ -51,8 +51,13 @@ TinyObjLoader is successfully used in ...
 
 ### New version(v1.0.x)
 
+* Double precision support through `TINYOBJLOADER_USE_DOUBLE` thanks to noma
 * Loading models in Vulkan Tutorial https://vulkan-tutorial.com/Loading_models
 * .obj viewer with Metal https://github.com/middlefeng/NuoModelViewer/tree/master
+* Vulkan Cookbook https://github.com/PacktPublishing/Vulkan-Cookbook
+* cudabox: CUDA Solid Voxelizer Engine https://github.com/gaspardzoss/cudavox
+* Drake: A planning, control, and analysis toolbox for nonlinear dynamical systems https://github.com/RobotLocomotion/drake
+* VFPR - a Vulkan Forward Plus Renderer : https://github.com/WindyDarian/Vulkan-Forward-Plus-Renderer
 * Your project here!
 
 ### Old version(v0.9.x)
@@ -91,13 +96,14 @@ TinyObjLoader is successfully used in ...
 * Crease tag('t'). This is OpenSubdiv specific(not in wavefront .obj specification)
 * PBR material extension for .MTL. Its proposed here: http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr
 * Callback API for custom loading.
+* Double precision support(for HPC application).
 
 
 ## TODO
 
 * [ ] Fix obj_sticker example.
 * [ ] More unit test codes.
-* [ ] Texture options
+* [x] Texture options
 * [ ] Normal vector generation
   * [ ] Support smoothing groups
 
@@ -107,10 +113,82 @@ Licensed under MIT license.
 
 ## Usage
 
+### Data format
+
 `attrib_t` contains single and linear array of vertex data(position, normal and texcoord).
-Each `shape_t` does not contain vertex data but contains array index to `attrib_t`.
+
+```
+attrib_t::vertices => 3 floats per vertex
+
+       v[0]        v[1]        v[2]        v[3]               v[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  | x | y | z | x | y | z | x | y | z | x | y | z | .... | x | y | z |
+  +-----------+-----------+-----------+-----------+      +-----------+
+
+attrib_t::normals => 3 floats per vertex
+
+       n[0]        n[1]        n[2]        n[3]               n[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  | x | y | z | x | y | z | x | y | z | x | y | z | .... | x | y | z |
+  +-----------+-----------+-----------+-----------+      +-----------+
+
+attrib_t::texcoords => 2 floats per vertex
+
+       t[0]        t[1]        t[2]        t[3]               t[n-1]
+  +-----------+-----------+-----------+-----------+      +-----------+
+  |  u  |  v  |  u  |  v  |  u  |  v  |  u  |  v  | .... |  u  |  v  |
+  +-----------+-----------+-----------+-----------+      +-----------+
+
+```
+
+Each `shape_t::mesh_t` does not contain vertex data but contains array index to `attrib_t`.
 See `loader_example.cc` for more details.
 
+
+```
+
+mesh_t::indices => array of vertex indices.
+
+  +----+----+----+----+----+----+----+----+----+----+     +--------+
+  | i0 | i1 | i2 | i3 | i4 | i5 | i6 | i7 | i8 | i9 | ... | i(n-1) |
+  +----+----+----+----+----+----+----+----+----+----+     +--------+
+
+Each index has an array index to attrib_t::vertices, attrib_t::normals and attrib_t::texcoords.
+
+mesh_t::num_face_vertices => array of the number of vertices per face(e.g. 3 = triangle, 4 = quad , 5 or more = N-gons).
+
+
+  +---+---+---+        +---+
+  | 3 | 4 | 3 | ...... | 3 |
+  +---+---+---+        +---+
+    |   |   |            |
+    |   |   |            +-----------------------------------------+
+    |   |   |                                                      |
+    |   |   +------------------------------+                       |
+    |   |                                  |                       |
+    |   +------------------+               |                       |
+    |                      |               |                       |
+    |/                     |/              |/                      |/
+
+ mesh_t::indices
+
+  |    face[0]   |       face[1]     |    face[2]   |     |      face[n-1]           |
+  +----+----+----+----+----+----+----+----+----+----+     +--------+--------+--------+
+  | i0 | i1 | i2 | i3 | i4 | i5 | i6 | i7 | i8 | i9 | ... | i(n-3) | i(n-2) | i(n-1) | 
+  +----+----+----+----+----+----+----+----+----+----+     +--------+--------+--------+
+
+```
+
+Note that when `triangulate` flas is true in `tinyobj::LoadObj()` argument, `num_face_vertices` are all filled with 3(triangle).
+
+### float data type
+
+TinyObjLoader now use `real_t` for floating point data type.
+Default is `float(32bit)`. 
+You can enable `double(64bit)` precision by using `TINYOBJLOADER_USE_DOUBLE` define.
+
+#### Example code
+
 ```c++
 #define TINYOBJLOADER_IMPLEMENTATION // define this in only *one* .cc
 #include "tiny_obj_loader.h"
@@ -142,14 +220,14 @@ for (size_t s = 0; s < shapes.size(); s++) {
     for (size_t v = 0; v < fv; v++) {
       // access to vertex
       tinyobj::index_t idx = shapes[s].mesh.indices[index_offset + v];
-      float vx = attrib.vertices[3*idx.vertex_index+0];
+      tinyobj::real_t vx = attrib.vertices[3*idx.vertex_index+0];
-      float vy = attrib.vertices[3*idx.vertex_index+1];
+      tinyobj::real_t vy = attrib.vertices[3*idx.vertex_index+1];
-      float vz = attrib.vertices[3*idx.vertex_index+2];
+      tinyobj::real_t vz = attrib.vertices[3*idx.vertex_index+2];
-      float nx = attrib.normals[3*idx.normal_index+0];
+      tinyobj::real_t nx = attrib.normals[3*idx.normal_index+0];
-      float ny = attrib.normals[3*idx.normal_index+1];
+      tinyobj::real_t ny = attrib.normals[3*idx.normal_index+1];
-      float nz = attrib.normals[3*idx.normal_index+2];
+      tinyobj::real_t nz = attrib.normals[3*idx.normal_index+2];
-      float tx = attrib.texcoords[2*idx.texcoord_index+0];
+      tinyobj::real_t tx = attrib.texcoords[2*idx.texcoord_index+0];
-      float ty = attrib.texcoords[2*idx.texcoord_index+1];
+      tinyobj::real_t ty = attrib.texcoords[2*idx.texcoord_index+1];
     }
     index_offset += fv;
 
@@ -171,7 +249,7 @@ Here is some benchmark result. Time are measured on MacBook 12(Early 2016, Core
 * Rungholt scene(6M triangles)
   * old version(v0.9.x): 15500 msecs.
   * baseline(v1.0.x): 6800 msecs(2.3x faster than old version)
-  * optimised: 1500 msecs(10x faster than old version, 4.5x faster than basedline)
+  * optimised: 1500 msecs(10x faster than old version, 4.5x faster than baseline)
 
 
 ## Tests

examples/viewer/README.md

@@ -6,7 +6,6 @@
 * glfw3
 * glew
 
-
 ## Build on MaCOSX
 
 Install glfw3 and glew using brew.
@@ -35,3 +34,9 @@ Put glfw3 and glew library somewhere and replace include and lib path in `premak
 Then,
 
     > premake5.exe vs2013
+
+## TODO
+
+* [ ] Support per-face material.
+* [ ] Use shader-based GL rendering.
+* [ ] PBR shader support.

examples/viewer/viewer.cc

@@ -123,7 +123,7 @@ class timerutil {
 };
 
 typedef struct {
-  GLuint vb;  // vertex buffer
+  GLuint vb_id;  // vertex buffer id
   int numTriangles;
   size_t material_id;
 } DrawObject;
@@ -143,7 +143,26 @@ float eye[3], lookat[3], up[3];
 
 GLFWwindow* window;
 
-void CheckErrors(std::string desc) {
+static std::string GetBaseDir(const std::string &filepath) {
+  if (filepath.find_last_of("/\\") != std::string::npos)
+    return filepath.substr(0, filepath.find_last_of("/\\"));
+  return "";
+}
+
+static bool FileExists(const std::string &abs_filename) {
+  bool ret;
+  FILE *fp = fopen(abs_filename.c_str(), "rb");
+  if (fp) {
+    ret = true;
+    fclose(fp);
+  } else {
+    ret = false;
+  }
+
+  return ret;
+}
+
+static void CheckErrors(std::string desc) {
   GLenum e = glGetError();
   if (e != GL_NO_ERROR) {
     fprintf(stderr, "OpenGL error in \"%s\": %d (%d)\n", desc.c_str(), e, e);
@@ -151,7 +170,7 @@ void CheckErrors(std::string desc) {
   }
 }
 
-void CalcNormal(float N[3], float v0[3], float v1[3], float v2[3]) {
+static void CalcNormal(float N[3], float v0[3], float v1[3], float v2[3]) {
   float v10[3];
   v10[0] = v1[0] - v0[0];
   v10[1] = v1[1] - v0[1];
@@ -175,7 +194,7 @@ void CalcNormal(float N[3], float v0[3], float v1[3], float v2[3]) {
   }
 }
 
-bool LoadObjAndConvert(float bmin[3], float bmax[3],
+static bool LoadObjAndConvert(float bmin[3], float bmax[3],
                        std::vector<DrawObject>* drawObjects,
                        std::vector<tinyobj::material_t>& materials,
                        std::map<std::string, GLuint>& textures,
@@ -187,9 +206,19 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
 
   tm.start();
 
+  std::string base_dir = GetBaseDir(filename);
+  if (base_dir.empty()) {
+    base_dir = ".";
+  }
+#ifdef _WIN32
+  base_dir += "\\";
+#else
+  base_dir += "/";
+#endif
+
   std::string err;
   bool ret =
-      tinyobj::LoadObj(&attrib, &shapes, &materials, &err, filename, NULL);
+      tinyobj::LoadObj(&attrib, &shapes, &materials, &err, filename, base_dir.c_str());
   if (!err.empty()) {
     std::cerr << err << std::endl;
   }
@@ -209,6 +238,13 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
   printf("# of materials = %d\n", (int)materials.size());
   printf("# of shapes    = %d\n", (int)shapes.size());
 
+  // Append `default` material
+  materials.push_back(tinyobj::material_t());
+
+  for (size_t i = 0; i < materials.size(); i++) {
+    printf("material[%d].diffuse_texname = %s\n", int(i), materials[i].diffuse_texname.c_str());
+  }
+
   // Load diffuse textures
   {
       for (size_t m = 0; m < materials.size(); m++) {
@@ -220,20 +256,35 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
                   GLuint texture_id;
                   int w, h;
                   int comp;
-                  unsigned char* image = stbi_load(mp->diffuse_texname.c_str(), &w, &h, &comp, STBI_default);
+
-                  if (image == nullptr) {
+                  std::string texture_filename = mp->diffuse_texname;
-                      std::cerr << "Unable to load texture: " << mp->diffuse_texname << std::endl;
+                  if (!FileExists(texture_filename)) {
+                    // Append base dir.
+                    texture_filename = base_dir + mp->diffuse_texname;
+                    if (!FileExists(texture_filename)) {
+                      std::cerr << "Unable to find file: " << mp->diffuse_texname << std::endl;
+                      exit(1);
+                    }
+                  }
+                  
+                  unsigned char* image = stbi_load(texture_filename.c_str(), &w, &h, &comp, STBI_default);
+                  if (!image) {
+                      std::cerr << "Unable to load texture: " << texture_filename << std::endl;
                       exit(1);
                   }
+                  std::cout << "Loaded texture: " << texture_filename << ", w = " << w << ", h = " << h << ", comp = " << comp << std::endl;
+
                   glGenTextures(1, &texture_id);
                   glBindTexture(GL_TEXTURE_2D, texture_id);
                   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-                  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+                  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
                   if (comp == 3) {
                       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
                   }
                   else if (comp == 4) {
                       glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
+                  } else {
+                      assert(0); // TODO
                   }
                   glBindTexture(GL_TEXTURE_2D, 0);
                   stbi_image_free(image);
@@ -248,24 +299,23 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
 
   {
     for (size_t s = 0; s < shapes.size(); s++) {
-      size_t current_material_id = 0;
-      if (shapes[s].mesh.material_ids.size() > 0 && shapes[s].mesh.material_ids.size() > s) {
-          // Base case
-          current_material_id = shapes[s].mesh.material_ids[s];
-      }
       DrawObject o;
-      std::vector<float> vb;  // pos(3float), normal(3float), color(3float)
+      std::vector<float> buffer;  // pos(3float), normal(3float), color(3float)
       for (size_t f = 0; f < shapes[s].mesh.indices.size() / 3; f++) {
         tinyobj::index_t idx0 = shapes[s].mesh.indices[3 * f + 0];
         tinyobj::index_t idx1 = shapes[s].mesh.indices[3 * f + 1];
         tinyobj::index_t idx2 = shapes[s].mesh.indices[3 * f + 2];
         
-        current_material_id = shapes[s].mesh.material_ids[f];
+        int current_material_id = shapes[s].mesh.material_ids[f];
 
-        if (current_material_id >= materials.size()) {
+        if ((current_material_id < 0) || (current_material_id >= static_cast<int>(materials.size()))) {
-            std::cerr << "Invalid material index: " << current_material_id << std::endl;
+          // Invaid material ID. Use default material.
+          current_material_id = materials.size() - 1; // Default material is added to the last item in `materials`.
         }
-        
+        //if (current_material_id >= materials.size()) {
+        //    std::cerr << "Invalid material index: " << current_material_id << std::endl;
+        //}
+        //
         float diffuse[3];
         for (size_t i = 0; i < 3; i++) {
             diffuse[i] = materials[current_material_id].diffuse[i];
@@ -275,6 +325,8 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
             assert(attrib.texcoords.size() > 2 * idx0.texcoord_index + 1);
             assert(attrib.texcoords.size() > 2 * idx1.texcoord_index + 1);
             assert(attrib.texcoords.size() > 2 * idx2.texcoord_index + 1);
+
+            // Flip Y coord.
             tc[0][0] = attrib.texcoords[2 * idx0.texcoord_index];
             tc[0][1] = 1.0f - attrib.texcoords[2 * idx0.texcoord_index + 1];
             tc[1][0] = attrib.texcoords[2 * idx1.texcoord_index];
@@ -282,8 +334,12 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
             tc[2][0] = attrib.texcoords[2 * idx2.texcoord_index];
             tc[2][1] = 1.0f - attrib.texcoords[2 * idx2.texcoord_index + 1];
         } else {
-            std::cerr << "Texcoordinates are not defined" << std::endl;
+            tc[0][0] = 0.0f;
-            exit(2);
+            tc[0][1] = 0.0f;
+            tc[1][0] = 0.0f;
+            tc[1][1] = 0.0f;
+            tc[2][0] = 0.0f;
+            tc[2][1] = 0.0f;
         }
 
         float v[3][3];
@@ -331,12 +387,12 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
         }
 
         for (int k = 0; k < 3; k++) {
-          vb.push_back(v[k][0]);
+          buffer.push_back(v[k][0]);
-          vb.push_back(v[k][1]);
+          buffer.push_back(v[k][1]);
-          vb.push_back(v[k][2]);
+          buffer.push_back(v[k][2]);
-          vb.push_back(n[k][0]);
+          buffer.push_back(n[k][0]);
-          vb.push_back(n[k][1]);
+          buffer.push_back(n[k][1]);
-          vb.push_back(n[k][2]);
+          buffer.push_back(n[k][2]);
           // Combine normal and diffuse to get color.
           float normal_factor = 0.2;
           float diffuse_factor = 1 - normal_factor;
@@ -353,24 +409,33 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
             c[1] /= len;
             c[2] /= len;
           }
-          vb.push_back(c[0] * 0.5 + 0.5);
+          buffer.push_back(c[0] * 0.5 + 0.5);
-          vb.push_back(c[1] * 0.5 + 0.5);
+          buffer.push_back(c[1] * 0.5 + 0.5);
-          vb.push_back(c[2] * 0.5 + 0.5);
+          buffer.push_back(c[2] * 0.5 + 0.5);
           
-          vb.push_back(tc[k][0]);
+          buffer.push_back(tc[k][0]);
-          vb.push_back(tc[k][1]);
+          buffer.push_back(tc[k][1]);
         }
       }
 
-      o.vb = 0;
+      o.vb_id = 0;
       o.numTriangles = 0;
-      o.material_id = current_material_id;
+
-      if (vb.size() > 0) {
+      // OpenGL viewer does not support texturing with per-face material.
-        glGenBuffers(1, &o.vb);
+      if (shapes[s].mesh.material_ids.size() > 0 && shapes[s].mesh.material_ids.size() > s) {
-        glBindBuffer(GL_ARRAY_BUFFER, o.vb);
+          o.material_id = shapes[s].mesh.material_ids[0]; // use the material ID of the first face.
-        glBufferData(GL_ARRAY_BUFFER, vb.size() * sizeof(float), &vb.at(0),
+      } else {
+          o.material_id = materials.size() - 1; // = ID for default material.
+      }
+      printf("shape[%d] material_id %d\n", int(s), int(o.material_id));
+          
+      if (buffer.size() > 0) {
+        glGenBuffers(1, &o.vb_id);
+        glBindBuffer(GL_ARRAY_BUFFER, o.vb_id);
+        glBufferData(GL_ARRAY_BUFFER, buffer.size() * sizeof(float), &buffer.at(0),
                      GL_STATIC_DRAW);
-        o.numTriangles = vb.size() / (3 + 3 + 3 + 2) * 3;
+        o.numTriangles = buffer.size() / (3 + 3 + 3 + 2) / 3; // 3:vtx, 3:normal, 3:col, 2:texcoord
+
         printf("shape[%d] # of triangles = %d\n", static_cast<int>(s),
                o.numTriangles);
       }
@@ -385,7 +450,7 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3],
   return true;
 }
 
-void reshapeFunc(GLFWwindow* window, int w, int h) {
+static void reshapeFunc(GLFWwindow* window, int w, int h) {
   int fb_w, fb_h;
   // Get actual framebuffer size.
   glfwGetFramebufferSize(window, &fb_w, &fb_h);
@@ -401,7 +466,7 @@ void reshapeFunc(GLFWwindow* window, int w, int h) {
   height = h;
 }
 
-void keyboardFunc(GLFWwindow* window, int key, int scancode, int action,
+static void keyboardFunc(GLFWwindow* window, int key, int scancode, int action,
                   int mods) {
   (void)window;
   (void)scancode;
@@ -430,7 +495,7 @@ void keyboardFunc(GLFWwindow* window, int key, int scancode, int action,
   }
 }
 
-void clickFunc(GLFWwindow* window, int button, int action, int mods) {
+static void clickFunc(GLFWwindow* window, int button, int action, int mods) {
   (void)window;
   (void)mods;
   if (button == GLFW_MOUSE_BUTTON_LEFT) {
@@ -457,7 +522,7 @@ void clickFunc(GLFWwindow* window, int button, int action, int mods) {
   }
 }
 
-void motionFunc(GLFWwindow* window, double mouse_x, double mouse_y) {
+static void motionFunc(GLFWwindow* window, double mouse_x, double mouse_y) {
   (void)window;
   float rotScale = 1.0f;
   float transScale = 2.0f;
@@ -484,7 +549,7 @@ void motionFunc(GLFWwindow* window, double mouse_x, double mouse_y) {
   prevMouseY = mouse_y;
 }
 
-void Draw(const std::vector<DrawObject>& drawObjects, std::vector<tinyobj::material_t>& materials, std::map<std::string, GLuint>& textures) {
+static void Draw(const std::vector<DrawObject>& drawObjects, std::vector<tinyobj::material_t>& materials, std::map<std::string, GLuint>& textures) {
   glPolygonMode(GL_FRONT, GL_FILL);
   glPolygonMode(GL_BACK, GL_FILL);
 
@@ -493,19 +558,22 @@ void Draw(const std::vector<DrawObject>& drawObjects, std::vector<tinyobj::mater
   GLsizei stride = (3 + 3 + 3 + 2) * sizeof(float);
   for (size_t i = 0; i < drawObjects.size(); i++) {
     DrawObject o = drawObjects[i];
-    if (o.vb < 1) {
+    if (o.vb_id < 1) {
       continue;
     }
 
-    glBindBuffer(GL_ARRAY_BUFFER, o.vb);
+    glBindBuffer(GL_ARRAY_BUFFER, o.vb_id);
     glEnableClientState(GL_VERTEX_ARRAY);
     glEnableClientState(GL_NORMAL_ARRAY);
     glEnableClientState(GL_COLOR_ARRAY);
     glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 
-    std::string diffuse_texname = materials[o.material_id].diffuse_texname;
+    glBindTexture(GL_TEXTURE_2D, 0);
-    if (diffuse_texname.length() > 0) {
+    if ((o.material_id < materials.size())) {
-        glBindTexture(GL_TEXTURE_2D, textures[diffuse_texname]);
+      std::string diffuse_texname = materials[o.material_id].diffuse_texname;
+      if (textures.find(diffuse_texname) != textures.end()) {
+          glBindTexture(GL_TEXTURE_2D, textures[diffuse_texname]);
+      }
     }
     glVertexPointer(3, GL_FLOAT, stride, (const void*)0);
     glNormalPointer(GL_FLOAT, stride, (const void*)(sizeof(float) * 3));
@@ -525,11 +593,11 @@ void Draw(const std::vector<DrawObject>& drawObjects, std::vector<tinyobj::mater
   glColor3f(0.0f, 0.0f, 0.4f);
   for (size_t i = 0; i < drawObjects.size(); i++) {
     DrawObject o = drawObjects[i];
-    if (o.vb < 1) {
+    if (o.vb_id < 1) {
       continue;
     }
 
-    glBindBuffer(GL_ARRAY_BUFFER, o.vb);
+    glBindBuffer(GL_ARRAY_BUFFER, o.vb_id);
     glEnableClientState(GL_VERTEX_ARRAY);
     glEnableClientState(GL_NORMAL_ARRAY);
     glDisableClientState(GL_COLOR_ARRAY);

examples/voxelize/Makefile

@@ -0,0 +1,2 @@
+all:
+	g++ -o voxelizer main.cc

examples/voxelize/README.md

@@ -0,0 +1,5 @@
+# Voxelize .obj and export it as also in .obj
+
+## Third party library
+
+This example uses https://github.com/karimnaaji/voxelizer, which is licensed under MIT Liense.

examples/voxelize/main.cc

@@ -0,0 +1,74 @@
+#define VOXELIZER_IMPLEMENTATION
+#include "voxelizer.h"
+
+#define TINYOBJLOADER_IMPLEMENTATION
+#include "../../tiny_obj_loader.h"
+
+bool Voxelize(const char* filename, float voxelsizex, float voxelsizey, float voxelsizez, float precision)
+{
+    tinyobj::attrib_t attrib;
+    std::vector<tinyobj::shape_t> shapes;
+    std::vector<tinyobj::material_t> materials;
+    std::string err;
+    bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, filename);
+
+    if (!err.empty()) {
+      printf("err: %s\n", err.c_str());
+    }
+
+    if (!ret) {
+      printf("failed to load : %s\n", filename);
+      return false;
+    }
+
+    if (shapes.size() == 0) {
+      printf("err: # of shapes are zero.\n");
+      return false;
+    }
+
+    // Only use first shape.
+    {
+        vx_mesh_t* mesh;
+        vx_mesh_t* result;
+
+        mesh = vx_mesh_alloc(attrib.vertices.size(), shapes[0].mesh.indices.size());
+
+        for (size_t f = 0; f < shapes[0].mesh.indices.size(); f++) {
+            mesh->indices[f] = shapes[0].mesh.indices[f].vertex_index;
+        }
+
+        for (size_t v = 0; v < attrib.vertices.size() / 3; v++) {
+            mesh->vertices[v].x = attrib.vertices[3*v+0];
+            mesh->vertices[v].y = attrib.vertices[3*v+1];
+            mesh->vertices[v].z = attrib.vertices[3*v+2];
+        }
+
+        result = vx_voxelize(mesh, voxelsizex, voxelsizey, voxelsizez, precision);
+
+        printf("Number of vertices: %ld\n", result->nvertices);
+        printf("Number of indices: %ld\n", result->nindices);
+    }
+    return true;
+}
+
+
+int
+main(
+  int argc,
+  char** argv)
+{
+  if (argc < 4) {
+    printf("Usage: voxelize input.obj voxelsizex voxelsizey voxelsizez precision\n");
+    exit(-1);
+  }
+
+  const char* filename = argv[1];
+  float voxelsizex = atof(argv[2]);
+  float voxelsizey = atof(argv[3]);
+  float voxelsizez = atof(argv[4]);
+  float prec = atof(argv[5]);
+  bool ret = Voxelize(filename, voxelsizex, voxelsizey, voxelsizez, prec);
+
+  return ret ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+

examples/voxelize/voxelizer.h

@@ -0,0 +1,764 @@
+//
+// LICENCE:
+//  The MIT License (MIT)
+//
+//  Copyright (c) 2016 Karim Naaji, karim.naaji@gmail.com
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE
+//
+// REFERENCES:
+//  http://matthias-mueller-fischer.ch/publications/tetraederCollision.pdf
+//  http://fileadmin.cs.lth.se/cs/Personal/Tomas_Akenine-Moller/code/tribox2.txt
+//
+// HOWTO:
+//  #define VOXELIZER_IMPLEMENTATION
+//  #define VOXELIZER_DEBUG // Only if assertions need to be checked
+//  #include "voxelizer.h"
+//
+// HISTORY:
+//  - version 0.9.0: Initial
+//
+// TODO:
+//  - Triangle face merging
+//  - Add colors from input mesh
+//  - Potential issue with voxel bigger than triangle
+//
+
+#ifndef VOXELIZER_H
+#define VOXELIZER_H
+
+// ------------------------------------------------------------------------------------------------
+// VOXELIZER PUBLIC API
+//
+
+#ifndef VOXELIZER_HELPERS
+#include <stdlib.h> // malloc, calloc, free
+#endif
+
+typedef struct vx_vertex {
+    union {
+        float v[3];
+        struct {
+            float x;
+            float y;
+            float z;
+        };
+    };
+} vx_vertex_t;
+
+typedef struct vx_mesh {
+    vx_vertex_t* vertices;          // Contiguous mesh vertices
+    vx_vertex_t* normals;           // Contiguous mesh normals
+    unsigned int* indices;          // Mesh indices
+    unsigned int* normalindices;    // Mesh normal indices
+    size_t nindices;                // The number of normal indices
+    size_t nvertices;               // The number of vertices
+    size_t nnormals;                // The number of normals
+} vx_mesh_t;
+
+vx_mesh_t* vx_voxelize(vx_mesh_t* _mesh,    // The input mesh
+        float voxelsizex,                   // Voxel size on X-axis
+        float voxelsizey,                   // Voxel size on Y-axis
+        float voxelsizez,                   // Voxel size on Z-axis
+        float precision);                   // A precision factor that reduces "holes" artifact
+                                            // usually a precision = voxelsize / 10. works ok.
+
+void vx_mesh_free(vx_mesh_t* _mesh);
+vx_mesh_t* vx_mesh_alloc(int nindices, int nvertices);
+
+// Voxelizer Helpers, define your own if needed
+#ifndef VOXELIZER_HELPERS
+#define VOXELIZER_HELPERS 1
+#define VX_MIN(a, b) (a > b ? b : a)
+#define VX_MAX(a, b) (a > b ? a : b)
+#define VX_FINDMINMAX(x0, x1, x2, min, max) \
+    min = max = x0;                         \
+    if (x1 < min) min = x1;                 \
+    if (x1 > max) max = x1;                 \
+    if (x2 < min) min = x2;                 \
+    if (x2 > max) max = x2;
+#define VX_CLAMP(v, lo, hi) VX_MAX(lo, VX_MIN(hi, v))
+#define VX_MALLOC(T, N) ((T*) malloc(N * sizeof(T)))
+#define VX_FREE(T) free(T)
+#define VX_CALLOC(T, N) ((T*) calloc(N * sizeof(T), 1))
+#define VX_SWAP(T, A, B) { T tmp = B; B = A; A = tmp; }
+#ifdef VOXELIZER_DEBUG
+#define VX_ASSERT(STMT) if (!(STMT)) { *(int *)0 = 0; }
+#else
+#define VX_ASSERT(STMT)
+#endif // VOXELIZER_DEBUG
+#endif // VOXELIZER_HELPERS
+
+//
+// END VOXELIZER PUBLIC API
+// ------------------------------------------------------------------------------------------------
+
+#endif // VOXELIZER_H
+
+#ifdef VOXELIZER_IMPLEMENTATION
+
+#include <math.h>       // ceil, fabs & al.
+#include <stdbool.h>    // hughh
+#include <string.h>     // memcpy
+
+#define VOXELIZER_EPSILON               (0.0000001)
+#define VOXELIZER_NORMAL_INDICES_SIZE   (6)
+#define VOXELIZER_INDICES_SIZE          (36)
+#define VOXELIZER_HASH_TABLE_SIZE       (4096)
+
+unsigned int vx_voxel_indices[VOXELIZER_INDICES_SIZE] = {
+    0, 1, 2,
+    0, 2, 3,
+    3, 2, 6,
+    3, 6, 7,
+    0, 7, 4,
+    0, 3, 7,
+    4, 7, 5,
+    7, 6, 5,
+    0, 4, 5,
+    0, 5, 1,
+    1, 5, 6,
+    1, 6, 2,
+};
+
+float vx_normals[18] = {
+     0.0, -1.0,  0.0,
+     0.0,  1.0,  0.0,
+     1.0,  0.0,  0.0,
+     0.0,  0.0,  1.0,
+    -1.0,  0.0,  0.0,
+     0.0,  0.0, -1.0,
+};
+
+unsigned int vx_normal_indices[VOXELIZER_NORMAL_INDICES_SIZE] = {
+    3, 2, 1, 5, 4, 0,
+};
+
+typedef struct vx_aabb {
+    vx_vertex_t min;
+    vx_vertex_t max;
+} vx_aabb_t;
+
+typedef struct vx_edge {
+    vx_vertex_t p1;
+    vx_vertex_t p2;
+} vx_edge_t;
+
+typedef struct vx_triangle {
+    vx_vertex_t p1;
+    vx_vertex_t p2;
+    vx_vertex_t p3;
+} vx_triangle_t;
+
+typedef struct vx_hash_table_node {
+    struct vx_hash_table_node* next;
+    struct vx_hash_table_node* prev;
+    void* data;
+} vx_hash_table_node_t;
+
+typedef struct vx_hash_table {
+    vx_hash_table_node_t** elements;
+    size_t size;
+} vx_hash_table_t;
+
+vx_hash_table_t* vx__hash_table_alloc(size_t size)
+{
+    vx_hash_table_t* table = VX_MALLOC(vx_hash_table_t, 1);
+    if (!table) { return NULL; }
+    table->size = size;
+    table->elements = VX_MALLOC(vx_hash_table_node_t*, size);
+    if (!table->elements) { return NULL; }
+    for (size_t i = 0; i < table->size; ++i) {
+        table->elements[i] = NULL;
+    }
+    return table;
+}
+
+void vx__hash_table_free(vx_hash_table_t* table, bool freedata)
+{
+    for (size_t i = 0; i < table->size; ++i) {
+        vx_hash_table_node_t* node = table->elements[i];
+
+        if (node) {
+            if (node->next) {
+                while (node->next) {
+                    node = node->next;
+                    if (freedata) {
+                        VX_FREE(node->prev->data);
+                    }
+                    VX_FREE(node->prev);
+                }
+                VX_FREE(node);
+            } else {
+                VX_FREE(node->data);
+                VX_FREE(node);
+            }
+        }
+    }
+
+    VX_FREE(table->elements);
+    VX_FREE(table);
+}
+
+bool vx__hash_table_insert(vx_hash_table_t* table,
+    size_t hash,
+    void* data,
+    bool (*compfunc)(void* d1, void* d2))
+{
+    if (!table->elements[hash]) {
+        table->elements[hash] = VX_MALLOC(vx_hash_table_node_t, 1);
+        table->elements[hash]->prev = NULL;
+        table->elements[hash]->next = NULL;
+        table->elements[hash]->data = data;
+    } else {
+        vx_hash_table_node_t* node = table->elements[hash];
+
+        if (compfunc && compfunc(node->data, data)) {
+            return false;
+        }
+
+        while (node->next) {
+            node = node->next;
+            if (compfunc && compfunc(node->data, data)) {
+                return false;
+            }
+        }
+
+        vx_hash_table_node_t* nnode = VX_MALLOC(vx_hash_table_node_t, 1);
+
+        nnode->prev = node;
+        nnode->next = NULL;
+        nnode->data = data;
+        node->next = nnode;
+    }
+    return true;
+}
+
+void vx_mesh_free(vx_mesh_t* m)
+{
+    VX_FREE(m->vertices);
+    m->vertices = NULL;
+    m->nvertices = 0;
+    VX_FREE(m->indices);
+    m->indices = NULL;
+    m->nindices = 0;
+    if (m->normals) { VX_FREE(m->normals); }
+    VX_FREE(m);
+}
+
+vx_mesh_t* vx_mesh_alloc(int nvertices, int nindices)
+{
+    vx_mesh_t* m = VX_MALLOC(vx_mesh_t, 1);
+    if (!m) { return NULL; }
+    m->indices = VX_CALLOC(unsigned int, nindices);
+    if (!m->indices) { return NULL; }
+    m->vertices = VX_CALLOC(vx_vertex_t, nvertices);
+    if (!m->vertices) { return NULL; }
+    m->normals = NULL;
+    m->nindices = nindices;
+    m->nvertices = nvertices;
+    return m;
+}
+
+float vx__map_to_voxel(float position, float voxelSize, bool min)
+{
+    float vox = (position + (position < 0.f ? -1.f : 1.f) * voxelSize * 0.5f) / voxelSize;
+    return (min ? floor(vox) : ceil(vox)) * voxelSize;
+}
+
+vx_vertex_t vx__vertex_cross(vx_vertex_t* v1, vx_vertex_t* v2)
+{
+    vx_vertex_t cross;
+    cross.x = v1->y * v2->z - v1->z * v2->y;
+    cross.y = v1->z * v2->x - v1->x * v2->z;
+    cross.z = v1->x * v2->y - v1->y * v2->x;
+    return cross;
+}
+
+bool vx__vertex_equals(vx_vertex_t* v1, vx_vertex_t* v2) {
+    return fabs(v1->x - v2->x) < VOXELIZER_EPSILON &&
+           fabs(v1->y - v2->y) < VOXELIZER_EPSILON &&
+           fabs(v1->z - v2->z) < VOXELIZER_EPSILON;
+}
+
+bool vx__vertex_comp_func(void* a, void* b)
+{
+    return vx__vertex_equals((vx_vertex_t*) a, (vx_vertex_t*) b);
+}
+
+void vx__vertex_sub(vx_vertex_t* a, vx_vertex_t* b)
+{
+    a->x -= b->x;
+    a->y -= b->y;
+    a->z -= b->z;
+}
+
+void vx__vertex_add(vx_vertex_t* a, vx_vertex_t* b)
+{
+    a->x += b->x;
+    a->y += b->y;
+    a->z += b->z;
+}
+
+void vx__vertex_multiply(vx_vertex_t* a, float v)
+{
+    a->x *= v;
+    a->y *= v;
+    a->z *= v;
+}
+
+float vx__vertex_dot(vx_vertex_t* v1, vx_vertex_t* v2)
+{
+    return v1->x * v2->x + v1->y * v2->y + v1->z * v2->z;
+}
+
+int vx__plane_box_overlap(vx_vertex_t* normal,
+    float d,
+    vx_vertex_t* halfboxsize)
+{
+    vx_vertex_t vmin, vmax;
+
+    for (int dim = 0; dim <= 2; dim++) {
+        if (normal->v[dim] > 0.0f) {
+            vmin.v[dim] = -halfboxsize->v[dim];
+            vmax.v[dim] = halfboxsize->v[dim];
+        } else {
+            vmin.v[dim] = halfboxsize->v[dim];
+            vmax.v[dim] = -halfboxsize->v[dim];
+        }
+    }
+
+    if (vx__vertex_dot(normal, &vmin) + d > 0.0f) {
+        return false;
+    }
+
+    if (vx__vertex_dot(normal, &vmax) + d >= 0.0f) {
+        return true;
+    }
+
+    return false;
+}
+
+#define AXISTEST_X01(a, b, fa, fb)                 \
+    p1 = a * v1.y - b * v1.z;                      \
+    p3 = a * v3.y - b * v3.z;                      \
+    if (p1 < p3) {                                 \
+        min = p1; max = p3;                        \
+    } else {                                       \
+        min = p3; max = p1;                        \
+    }                                              \
+    rad = fa * halfboxsize.y + fb * halfboxsize.z; \
+    if (min > rad || max < -rad) {                 \
+        return false;                              \
+    }                                              \
+
+#define AXISTEST_X2(a, b, fa, fb)                  \
+    p1 = a * v1.y - b * v1.z;                      \
+    p2 = a * v2.y - b * v2.z;                      \
+    if (p1 < p2) {                                 \
+        min = p1; max = p2;                        \
+    } else {                                       \
+        min = p2; max = p1;                        \
+    }                                              \
+    rad = fa * halfboxsize.y + fb * halfboxsize.z; \
+    if (min > rad || max < -rad) {                 \
+        return false;                              \
+    }                                              \
+
+#define AXISTEST_Y02(a, b, fa, fb)                 \
+    p1 = -a * v1.x + b * v1.z;                     \
+    p3 = -a * v3.x + b * v3.z;                     \
+    if (p1 < p3) {                                 \
+        min = p1; max = p3;                        \
+    } else {                                       \
+        min = p3; max = p1;                        \
+    }                                              \
+    rad = fa * halfboxsize.x + fb * halfboxsize.z; \
+    if (min > rad || max < -rad) {                 \
+        return false;                              \
+    }                                              \
+
+#define AXISTEST_Y1(a, b, fa, fb)                  \
+    p1 = -a * v1.x + b * v1.z;                     \
+    p2 = -a * v2.x + b * v2.z;                     \
+    if (p1 < p2) {                                 \
+        min = p1; max = p2;                        \
+    } else {                                       \
+        min = p2; max = p1;                        \
+    }                                              \
+    rad = fa * halfboxsize.x + fb * halfboxsize.z; \
+    if (min > rad || max < -rad) {                 \
+        return false;                              \
+    }
+
+#define AXISTEST_Z12(a, b, fa, fb)                 \
+    p2 = a * v2.x - b * v2.y;                      \
+    p3 = a * v3.x - b * v3.y;                      \
+    if (p3 < p2) {                                 \
+        min = p3; max = p2;                        \
+    } else {                                       \
+        min = p2; max = p3;                        \
+    }                                              \
+    rad = fa * halfboxsize.x + fb * halfboxsize.y; \
+    if (min > rad || max < -rad) {                 \
+        return false;                              \
+    }
+
+#define AXISTEST_Z0(a, b, fa, fb)                  \
+    p1 = a * v1.x - b * v1.y;                      \
+    p2 = a * v2.x - b * v2.y;                      \
+    if (p1 < p2) {                                 \
+        min = p1; max = p2;                        \
+    } else {                                       \
+        min = p2; max = p1;                        \
+    }                                              \
+    rad = fa * halfboxsize.x + fb * halfboxsize.y; \
+    if (min > rad || max < -rad) {                 \
+        return false;                              \
+    }
+
+int vx__triangle_box_overlap(vx_vertex_t boxcenter,
+    vx_vertex_t halfboxsize,
+    vx_triangle_t triangle)
+{
+    vx_vertex_t v1, v2, v3, normal, e1, e2, e3;
+    float min, max, d, p1, p2, p3, rad, fex, fey, fez;
+
+    v1 = triangle.p1;
+    v2 = triangle.p2;
+    v3 = triangle.p3;
+
+    vx__vertex_sub(&v1, &boxcenter);
+    vx__vertex_sub(&v2, &boxcenter);
+    vx__vertex_sub(&v3, &boxcenter);
+
+    e1 = v2;
+    e2 = v3;
+    e3 = v1;
+
+    vx__vertex_sub(&e1, &v1);
+    vx__vertex_sub(&e2, &v2);
+    vx__vertex_sub(&e3, &v3);
+
+    fex = fabs(e1.x);
+    fey = fabs(e1.y);
+    fez = fabs(e1.z);
+
+    AXISTEST_X01(e1.z, e1.y, fez, fey);
+    AXISTEST_Y02(e1.z, e1.x, fez, fex);
+    AXISTEST_Z12(e1.y, e1.x, fey, fex);
+
+    fex = fabs(e2.x);
+    fey = fabs(e2.y);
+    fez = fabs(e2.z);
+
+    AXISTEST_X01(e2.z, e2.y, fez, fey);
+    AXISTEST_Y02(e2.z, e2.x, fez, fex);
+    AXISTEST_Z0(e2.y, e2.x, fey, fex);
+
+    fex = fabs(e3.x);
+    fey = fabs(e3.y);
+    fez = fabs(e3.z);
+
+    AXISTEST_X2(e3.z, e3.y, fez, fey);
+    AXISTEST_Y1(e3.z, e3.x, fez, fex);
+    AXISTEST_Z12(e3.y, e3.x, fey, fex);
+
+    VX_FINDMINMAX(v1.x, v2.x, v3.x, min, max);
+    if (min > halfboxsize.x || max < -halfboxsize.x) {
+        return false;
+    }
+
+    VX_FINDMINMAX(v1.y, v2.y, v3.y, min, max);
+    if (min > halfboxsize.y || max < -halfboxsize.y) {
+        return false;
+    }
+
+    VX_FINDMINMAX(v1.z, v2.z, v3.z, min, max);
+    if (min > halfboxsize.z || max < -halfboxsize.z) {
+        return false;
+    }
+
+    normal = vx__vertex_cross(&e1, &e2);
+    d = -vx__vertex_dot(&normal, &v1);
+
+    if (!vx__plane_box_overlap(&normal, d, &halfboxsize)) {
+        return false;
+    }
+
+    return true;
+}
+
+#undef AXISTEST_X2
+#undef AXISTEST_X01
+#undef AXISTEST_Y1
+#undef AXISTEST_Y02
+#undef AXISTEST_Z0
+#undef AXISTEST_Z12
+
+float vx__triangle_area(vx_triangle_t* triangle) {
+    vx_vertex_t ab = triangle->p2;
+    vx_vertex_t ac = triangle->p3;
+
+    vx__vertex_sub(&ab, &triangle->p1);
+    vx__vertex_sub(&ac, &triangle->p1);
+
+    float a0 = ab.y * ac.z - ab.z * ac.y;
+    float a1 = ab.z * ac.x - ab.x * ac.z;
+    float a2 = ab.x * ac.y - ab.y * ac.x;
+
+    return sqrtf(powf(a0, 2.f) + powf(a1, 2.f) + powf(a2, 2.f)) * 0.5f;
+}
+
+void vx__aabb_init(vx_aabb_t* aabb)
+{
+    aabb->max.x = aabb->max.y = aabb->max.z = -INFINITY;
+    aabb->min.x = aabb->min.y = aabb->min.z = INFINITY;
+}
+
+vx_aabb_t vx__triangle_aabb(vx_triangle_t* triangle)
+{
+    vx_aabb_t aabb;
+
+    vx__aabb_init(&aabb);
+
+    aabb.max.x = VX_MAX(aabb.max.x, triangle->p1.x); aabb.max.x = VX_MAX(aabb.max.x,
+            triangle->p2.x); aabb.max.x = VX_MAX(aabb.max.x, triangle->p3.x);
+    aabb.max.y = VX_MAX(aabb.max.y, triangle->p1.y); aabb.max.y = VX_MAX(aabb.max.y,
+            triangle->p2.y); aabb.max.y = VX_MAX(aabb.max.y, triangle->p3.y);
+    aabb.max.z = VX_MAX(aabb.max.z, triangle->p1.z); aabb.max.z = VX_MAX(aabb.max.z,
+            triangle->p2.z); aabb.max.z = VX_MAX(aabb.max.z, triangle->p3.z);
+
+    aabb.min.x = VX_MIN(aabb.min.x, triangle->p1.x); aabb.min.x = VX_MIN(aabb.min.x,
+            triangle->p2.x); aabb.min.x = VX_MIN(aabb.min.x, triangle->p3.x);
+    aabb.min.y = VX_MIN(aabb.min.y, triangle->p1.y); aabb.min.y = VX_MIN(aabb.min.y,
+            triangle->p2.y); aabb.min.y = VX_MIN(aabb.min.y, triangle->p3.y);
+    aabb.min.z = VX_MIN(aabb.min.z, triangle->p1.z); aabb.min.z = VX_MIN(aabb.min.z,
+            triangle->p2.z); aabb.min.z = VX_MIN(aabb.min.z, triangle->p3.z);
+
+    return aabb;
+}
+
+vx_vertex_t vx__aabb_center(vx_aabb_t* a)
+{
+    vx_vertex_t boxcenter = a->min;
+    vx__vertex_add(&boxcenter, &a->max);
+    vx__vertex_multiply(&boxcenter, 0.5f);
+
+    return boxcenter;
+}
+
+vx_vertex_t vx__aabb_half_size(vx_aabb_t* a)
+{
+    vx_vertex_t size;
+
+    size.x = fabs(a->max.x - a->min.x) * 0.5f;
+    size.y = fabs(a->max.y - a->min.y) * 0.5f;
+    size.z = fabs(a->max.z - a->min.z) * 0.5f;
+
+    return size;
+}
+
+vx_aabb_t vx__aabb_merge(vx_aabb_t* a, vx_aabb_t* b)
+{
+    vx_aabb_t merge;
+
+    merge.min.x = VX_MIN(a->min.x, b->min.x);
+    merge.min.y = VX_MIN(a->min.y, b->min.y);
+    merge.min.z = VX_MIN(a->min.z, b->min.z);
+
+    merge.max.x = VX_MAX(a->max.x, b->max.x);
+    merge.max.y = VX_MAX(a->max.y, b->max.y);
+    merge.max.z = VX_MAX(a->max.z, b->max.z);
+
+    return merge;
+}
+
+size_t vx__vertex_hash(vx_vertex_t pos, size_t n)
+{
+    size_t a = (size_t)(pos.x * 73856093);
+    size_t b = (size_t)(pos.y * 19349663);
+    size_t c = (size_t)(pos.z * 83492791);
+
+    return (a ^ b ^ c) % n;
+}
+
+void vx__add_voxel(vx_mesh_t* mesh,
+    vx_vertex_t* pos,
+    float* vertices)
+{
+    for (size_t i = 0; i < 8; ++i) {
+        size_t index = i+mesh->nvertices;
+
+        mesh->vertices[index].x = vertices[i*3+0] + pos->x;
+        mesh->vertices[index].y = vertices[i*3+1] + pos->y;
+        mesh->vertices[index].z = vertices[i*3+2] + pos->z;
+    }
+
+    int j = -1;
+    for (size_t i = 0; i < VOXELIZER_INDICES_SIZE; ++i) {
+        if (i % 6 == 0) {
+            j++;
+        }
+        mesh->normalindices[i+mesh->nindices] = vx_normal_indices[j];
+    }
+
+    for (size_t i = 0; i < VOXELIZER_INDICES_SIZE; ++i) {
+        mesh->indices[i+mesh->nindices] = vx_voxel_indices[i] + mesh->nvertices;
+    }
+
+    mesh->nindices += VOXELIZER_INDICES_SIZE;
+    mesh->nvertices += 8;
+}
+
+vx_mesh_t* vx_voxelize(vx_mesh_t* m,
+    float voxelsizex,
+    float voxelsizey,
+    float voxelsizez,
+    float precision)
+{
+    vx_mesh_t* outmesh = NULL;
+    vx_hash_table_t* table = NULL;
+    size_t voxels = 0;
+
+    float halfsizex = voxelsizex * 0.5f;
+    float halfsizey = voxelsizey * 0.5f;
+    float halfsizez = voxelsizez * 0.5f;
+
+    table = vx__hash_table_alloc(VOXELIZER_HASH_TABLE_SIZE);
+
+    for (int i = 0; i < m->nindices; i += 3) {
+        vx_triangle_t triangle;
+
+        VX_ASSERT(m->indices[i+0] < m->nvertices);
+        VX_ASSERT(m->indices[i+1] < m->nvertices);
+        VX_ASSERT(m->indices[i+2] < m->nvertices);
+
+        triangle.p1 = m->vertices[m->indices[i+0]];
+        triangle.p2 = m->vertices[m->indices[i+1]];
+        triangle.p3 = m->vertices[m->indices[i+2]];
+
+        if (vx__triangle_area(&triangle) < VOXELIZER_EPSILON) {
+            // triangle with 0 area
+            continue;
+        }
+
+        vx_aabb_t aabb = vx__triangle_aabb(&triangle);
+
+        aabb.min.x = vx__map_to_voxel(aabb.min.x, voxelsizex, true);
+        aabb.min.y = vx__map_to_voxel(aabb.min.y, voxelsizey, true);
+        aabb.min.z = vx__map_to_voxel(aabb.min.z, voxelsizez, true);
+
+        aabb.max.x = vx__map_to_voxel(aabb.max.x, voxelsizex, false);
+        aabb.max.y = vx__map_to_voxel(aabb.max.y, voxelsizey, false);
+        aabb.max.z = vx__map_to_voxel(aabb.max.z, voxelsizez, false);
+
+        for (float x = aabb.min.x; x < aabb.max.x; x += voxelsizex) {
+            for (float y = aabb.min.y; y < aabb.max.y; y += voxelsizey) {
+                for (float z = aabb.min.z; z < aabb.max.z; z += voxelsizez) {
+                    vx_aabb_t saabb;
+
+                    saabb.min.x = x - halfsizex;
+                    saabb.min.y = y - halfsizey;
+                    saabb.min.z = z - halfsizez;
+                    saabb.max.x = x + halfsizex;
+                    saabb.max.y = y + halfsizey;
+                    saabb.max.z = z + halfsizez;
+
+                    vx_vertex_t boxcenter = vx__aabb_center(&saabb);
+                    vx_vertex_t halfsize = vx__aabb_half_size(&saabb);
+
+                    // HACK: some holes might appear, this
+                    // precision factor reduces the artifact
+                    halfsize.x += precision;
+                    halfsize.y += precision;
+                    halfsize.z += precision;
+
+                    if (vx__triangle_box_overlap(boxcenter, halfsize, triangle)) {
+                        vx_vertex_t* nodedata = VX_MALLOC(vx_vertex_t, 1);
+                        *nodedata = boxcenter;
+
+                        size_t hash = vx__vertex_hash(boxcenter, VOXELIZER_HASH_TABLE_SIZE);
+
+                        bool insert = vx__hash_table_insert(table,
+                                hash,
+                                nodedata,
+                                vx__vertex_comp_func);
+
+                        if (insert) {
+                            voxels++;
+                        }
+                   }
+                }
+            }
+        }
+    }
+
+    outmesh = VX_MALLOC(vx_mesh_t, 1);
+    size_t nvertices = voxels * 8;
+    size_t nindices = voxels * VOXELIZER_INDICES_SIZE;
+    outmesh->nnormals = VOXELIZER_NORMAL_INDICES_SIZE;
+    outmesh->vertices = VX_CALLOC(vx_vertex_t, nvertices);
+    outmesh->normals = VX_CALLOC(vx_vertex_t, 6);
+    outmesh->indices = VX_CALLOC(unsigned int, nindices);
+    outmesh->normalindices = VX_CALLOC(unsigned int, nindices);
+    outmesh->nindices = 0;
+    outmesh->nvertices = 0;
+
+    memcpy(outmesh->normals, vx_normals, 18 * sizeof(float));
+
+    float vertices[24] = {
+        -halfsizex,  halfsizey,  halfsizez,
+        -halfsizex, -halfsizey,  halfsizez,
+         halfsizex, -halfsizey,  halfsizez,
+         halfsizex,  halfsizey,  halfsizez,
+        -halfsizex,  halfsizey, -halfsizez,
+        -halfsizex, -halfsizey, -halfsizez,
+         halfsizex, -halfsizey, -halfsizez,
+         halfsizex,  halfsizey, -halfsizez,
+    };
+
+    for (size_t i = 0; i < table->size; ++i) {
+        if (table->elements[i] != NULL) {
+            vx_hash_table_node_t* node = table->elements[i];
+
+            if (!node) {
+                continue;
+            }
+
+            vx_vertex_t* p = (vx_vertex_t*) node->data;
+            vx__add_voxel(outmesh, p, vertices);
+
+            while (node->next) {
+                node = node->next;
+                p = (vx_vertex_t*) node->data;
+                vx__add_voxel(outmesh, p, vertices);
+            }
+        }
+    }
+
+    vx__hash_table_free(table, true);
+
+    return outmesh;
+}
+
+#undef VOXELIZER_EPSILON
+#undef VOXELIZER_INDICES_SIZE
+#undef VOXELIZER_HASH_TABLE_SIZE
+
+#endif // VX_VOXELIZER_IMPLEMENTATION

experimental/LICENSE.ltalloc

@@ -1,26 +0,0 @@
-Copyright (c) 2013, Alexander Tretyak
-Copyright (c) 2015, r-lyeh
-All rights reserved.
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-    * Neither the name of the author nor the names of its
-contributors may be used to endorse or promote products derived
-from this software without specific prior written permission.
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

experimental/README.md

@@ -1,5 +1,16 @@
-Experimental code for .obj loader.
+# Experimental code for .obj loader.
 
 * Multi-threaded optimized parser : tinyobj_loader_opt.h
+
+## Requirements
+
+* C++-11 compiler
+
+## Compile options
+
 * zstd compressed .obj support. `--with-zstd` premake option.
 * gzip compressed .obj support. `--with-zlib` premake option.
+
+## Licenses
+
+* lfpAlloc : MIT license.

experimental/lfpAlloc/Allocator.hpp

@@ -0,0 +1,89 @@
+#ifndef LF_POOL_ALLOCATOR
+#define LF_POOL_ALLOCATOR
+
+#include <memory>
+#include <thread>
+#include <lfpAlloc/PoolDispatcher.hpp>
+
+namespace lfpAlloc {
+template <typename T, std::size_t NumPools = 70>
+class lfpAllocator {
+public:
+    using value_type = T;
+    using pointer = T*;
+    using const_pointer = const T*;
+    using reference = T&;
+    using const_reference = T const&;
+
+    template <typename U>
+    struct rebind {
+        typedef lfpAllocator<U, NumPools> other;
+    };
+
+    lfpAllocator() {}
+
+    template <typename U>
+    lfpAllocator(lfpAllocator<U, NumPools>&&) noexcept {}
+
+    template <typename U>
+    lfpAllocator(const lfpAllocator<U, NumPools>&) noexcept {}
+
+    T* allocate(std::size_t count) {
+        if (sizeof(T) * count <=
+            alignof(std::max_align_t) * NumPools - sizeof(void*)) {
+            return reinterpret_cast<T*>(
+                dispatcher_.allocate(sizeof(T) * count));
+        } else {
+            return new T[count];
+        }
+    }
+
+    void deallocate(T* p, std::size_t count) noexcept {
+        if (sizeof(T) * count <=
+            alignof(std::max_align_t) * NumPools - sizeof(void*)) {
+            dispatcher_.deallocate(p, sizeof(T) * count);
+        } else {
+            delete[] p;
+        }
+    }
+
+    // Should not be required, but allocator_traits is not complete in
+    // gcc 4.9.1
+    template <typename U>
+    void destroy(U* p) {
+        p->~U();
+    }
+
+    template <typename U, typename... Args>
+    void construct(U* p, Args&&... args) {
+        new (p) U(std::forward<Args>(args)...);
+    }
+
+    template <typename Ty, typename U, std::size_t N, std::size_t M>
+    friend bool operator==(const lfpAllocator<Ty, N>&,
+                           const lfpAllocator<U, M>&) noexcept;
+
+    template <typename U, std::size_t M>
+    friend class lfpAllocator;
+
+private:
+    static PoolDispatcher<NumPools> dispatcher_;
+};
+
+template <typename T, std::size_t N>
+PoolDispatcher<N> lfpAllocator<T, N>::dispatcher_;
+
+template <typename T, typename U, std::size_t N, std::size_t M>
+inline bool operator==(const lfpAllocator<T, N>&,
+                       const lfpAllocator<U, M>&) noexcept {
+    return N == M;
+}
+
+template <typename T, typename U, std::size_t N, std::size_t M>
+inline bool operator!=(const lfpAllocator<T, N>& left,
+                       const lfpAllocator<U, M>& right) noexcept {
+    return !(left == right);
+}
+}
+
+#endif

experimental/lfpAlloc/ChunkList.hpp

@@ -0,0 +1,116 @@
+#ifndef LF_POOL_ALLOC_CHUNK_LIST
+#define LF_POOL_ALLOC_CHUNK_LIST
+
+#include <cstdint>
+#include <atomic>
+#include <type_traits>
+
+#ifndef LFP_ALLOW_BLOCKING
+static_assert(ATOMIC_POINTER_LOCK_FREE == 2,
+              "Atomic pointer is not lock-free.");
+#endif
+
+namespace lfpAlloc {
+
+template <std::size_t Size>
+struct Cell {
+    uint8_t val_[Size];
+    Cell* next_ = this + 1;
+};
+
+// For small types (less than the size of void*), no additional
+// space is needed, so union val_ with next_ to avoid overhead.
+template <>
+struct Cell<0> {
+    Cell() : next_{this + 1} {}
+    union {
+        uint8_t val_[sizeof(Cell*)];
+        Cell* next_;
+    };
+};
+
+template <std::size_t Size, std::size_t AllocationsPerChunk>
+struct Chunk {
+    Chunk() noexcept {
+        auto& last = memBlock_[AllocationsPerChunk - 1];
+        last.next_ = nullptr;
+    }
+    Cell<Size> memBlock_[AllocationsPerChunk];
+};
+
+template <typename T>
+struct Node {
+    Node() : val_(), next_(nullptr) {}
+    Node(const T& val) : val_(val), next_(nullptr) {}
+    T val_;
+    std::atomic<Node<T>*> next_;
+};
+
+template <std::size_t Size, std::size_t AllocationsPerChunk>
+class ChunkList {
+    static constexpr auto CellSize =
+        (Size > sizeof(void*)) ? Size - sizeof(void*) : 0;
+    using Chunk_t = Chunk<CellSize, AllocationsPerChunk>;
+    using Cell_t = Cell<CellSize>;
+
+    using ChunkNode = Node<Chunk_t>;
+    using CellNode = Node<Cell_t*>;
+
+public:
+    static ChunkList& getInstance() {
+        static ChunkList c;
+        return c;
+    }
+
+    Cell_t* allocateChain() {
+        CellNode* recentHead = head_.load();
+        CellNode* currentNext = nullptr;
+        do {
+            // If there are no available chains, allocate a new chunk
+            if (!recentHead) {
+                ChunkNode* currentHandle;
+
+                // Make a new node
+                auto newChunk = new ChunkNode();
+
+                // Add the chunk to the chain
+                do {
+                    currentHandle = handle_.load();
+                    newChunk->next_ = currentHandle;
+                } while (
+                    !handle_.compare_exchange_weak(currentHandle, newChunk));
+                return &newChunk->val_.memBlock_[0];
+            }
+
+            currentNext = recentHead->next_;
+        } while (!head_.compare_exchange_weak(recentHead, currentNext));
+
+        auto retnValue = recentHead->val_;
+        delete recentHead;
+        return retnValue;
+    }
+
+    void deallocateChain(Cell_t* newCell) {
+        if (!newCell) {
+            return;
+        }
+        CellNode* currentHead = head_.load();
+
+        // Construct a new node to be added to the linked list
+        CellNode* newHead = new CellNode(newCell);
+
+        // Add the chain to the linked list
+        do {
+            newHead->next_.store(currentHead, std::memory_order_release);
+        } while (!head_.compare_exchange_weak(currentHead, newHead));
+    }
+
+private:
+    ChunkList() : handle_(nullptr), head_(nullptr) {}
+
+    std::atomic<ChunkNode*> handle_;
+    std::atomic<CellNode*> head_;
+};
+}
+
+#endif

experimental/lfpAlloc/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Adam Schwalm
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

experimental/lfpAlloc/Pool.hpp

@@ -0,0 +1,48 @@
+#ifndef LF_POOL_ALLOC_POOL
+#define LF_POOL_ALLOC_POOL
+
+#include <lfpAlloc/Utils.hpp>
+#include <lfpAlloc/ChunkList.hpp>
+
+namespace lfpAlloc {
+template <std::size_t Size, std::size_t AllocationsPerChunk>
+class Pool {
+    using ChunkList_t = ChunkList<Size, AllocationsPerChunk>;
+
+public:
+    static constexpr auto CellSize =
+        (Size > sizeof(void*)) ? Size - sizeof(void*) : 0;
+    using Cell_t = Cell<CellSize>;
+
+    Pool() : head_(nullptr) {}
+
+    ~Pool() { ChunkList_t::getInstance().deallocateChain(head_); }
+
+    void* allocate() {
+        // Head loaded from head_
+        Cell_t* currentHead = head_;
+        Cell_t* next;
+
+        // Out of cells to allocate
+        if (!currentHead) {
+            currentHead = ChunkList_t::getInstance().allocateChain();
+        }
+
+        next = currentHead->next_;
+        head_ = next;
+        return &currentHead->val_;
+    }
+
+    void deallocate(void* p) noexcept {
+        auto newHead = reinterpret_cast<Cell_t*>(p);
+        Cell_t* currentHead = head_;
+        newHead->next_ = currentHead;
+        head_ = newHead;
+    }
+
+private:
+    Cell_t* head_;
+};
+}
+
+#endif

experimental/lfpAlloc/PoolDispatcher.hpp

@@ -0,0 +1,79 @@
+#ifndef LF_POOL_DISPATCHER
+#define LF_POOL_DISPATCHER
+
+#include <tuple>
+#include <cassert>
+#include <cstddef>
+#include <lfpAlloc/Pool.hpp>
+
+#ifndef LFP_ALLOCATIONS_PER_CHUNK
+#define LFP_ALLOCATIONS_PER_CHUNK 64 * 100
+#endif
+
+namespace lfpAlloc {
+namespace detail {
+
+template <std::size_t Num, uint16_t... Ts>
+struct Pools : Pools<Num - 1, alignof(std::max_align_t) * Num, Ts...> {};
+
+template <uint16_t... Size>
+struct Pools<0, Size...> {
+    using type = std::tuple<Pool<Size, LFP_ALLOCATIONS_PER_CHUNK>...>;
+};
+}
+
+template <std::size_t NumPools>
+class PoolDispatcher {
+public:
+    void* allocate(std::size_t size) { return dispatchAllocate<0>(size); }
+
+    void deallocate(void* p, std::size_t size) noexcept {
+        dispatchDeallocate<0>(p, size);
+    }
+
+private:
+    thread_local static typename detail::Pools<NumPools>::type pools_;
+    static_assert(NumPools > 0, "Invalid number of pools");
+
+    template <std::size_t Index>
+        typename std::enable_if <
+        Index<NumPools, void*>::type
+        dispatchAllocate(std::size_t const& requestSize) {
+        if (requestSize <= std::get<Index>(pools_).CellSize) {
+            return std::get<Index>(pools_).allocate();
+        } else {
+            return dispatchAllocate<Index + 1>(requestSize);
+        }
+    }
+
+    template <std::size_t Index>
+    typename std::enable_if<!(Index < NumPools), void*>::type
+    dispatchAllocate(std::size_t const&) {
+        assert(false && "Invalid allocation size.");
+        return nullptr;
+    }
+
+    template <std::size_t Index>
+        typename std::enable_if <
+        Index<NumPools>::type
+        dispatchDeallocate(void* p, std::size_t const& requestSize) noexcept {
+        if (requestSize <= std::get<Index>(pools_).CellSize) {
+            std::get<Index>(pools_).deallocate(p);
+        } else {
+            dispatchDeallocate<Index + 1>(p, requestSize);
+        }
+    }
+
+    template <std::size_t Index>
+    typename std::enable_if<!(Index < NumPools)>::type
+    dispatchDeallocate(void*, std::size_t const&) noexcept {
+        assert(false && "Invalid deallocation size.");
+    }
+};
+
+template <std::size_t NumPools>
+thread_local typename detail::Pools<NumPools>::type
+    PoolDispatcher<NumPools>::pools_;
+}
+
+#endif

experimental/lfpAlloc/Utils.hpp

@@ -0,0 +1,20 @@
+#include <cstdint>
+
+namespace lfpAlloc {
+namespace detail {
+template <std::size_t Val, std::size_t base = 2>
+struct Log {
+    enum { value = 1 + Log<Val / base, base>::value };
+};
+
+template <std::size_t base>
+struct Log<1, base> {
+    enum { value = 0 };
+};
+
+template <std::size_t base>
+struct Log<0, base> {
+    enum { value = 0 };
+};
+}
+}

experimental/ltalloc.cc

@@ -1,973 +0,0 @@
-/*
-Copyright (c) 2013, Alexander Tretyak
-Copyright (c) 2015, r-lyeh
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-    * Neither the name of the author nor the names of its
-contributors may be used to endorse or promote products derived
-from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-  Note: The latest version of this memory allocator obtainable at
-        http://ltalloc.googlecode.com/hg/ltalloc.cc
-
-  Project URL: http://code.google.com/p/ltalloc
-*/
-
-#include "ltalloc.h"
-
-#define LTALLOC_VERSION "2.0.0" /* (2015/06/16) - ltcalloc(), ltmsize(), ltrealloc(), ltmemalign(), LTALLOC_AUTO_GC_INTERVAL 
-#define LTALLOC_VERSION "1.0.0" /* (2015/06/16) - standard STL allocator provided [see ltalloc.hpp file](ltalloc.hpp)
-#define LTALLOC_VERSION "0.0.0" /* (2013/xx/xx) - fork from public repository */
-
-//Customizable constants
-//#define LTALLOC_DISABLE_OPERATOR_NEW_OVERRIDE
-//#define LTALLOC_AUTO_GC_INTERVAL 3.0
-#ifndef LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO
-#define LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO 2//determines how accurately size classes are spaced (i.e. when = 0, allocation requests are rounded up to the nearest power of two (2^n), when = 1, rounded to 2^n, or (2^n)*1.5, when = 2, rounded to 2^n, (2^n)*1.25, (2^n)*1.5, or (2^n)*1.75, and so on); this parameter have direct influence on memory fragmentation - bigger values lead to reducing internal fragmentation (which can be approximately estimated as pow(0.5, VALUE)*100%), but at the same time increasing external fragmentation
-#endif
-#define CHUNK_SIZE     (64*1024)//size of chunk (basic allocation unit for all allocations of size <= MAX_BLOCK_SIZE); must be a power of two (as well as all following parameters), also should not be less than allocation granularity on Windows (which is always 64K by design of NT kernel)
-#define CACHE_LINE_SIZE 64
-#define MAX_NUM_OF_BLOCKS_IN_BATCH 256//maximum number of blocks to move between a thread cache and a central cache in one shot
-static const unsigned int MAX_BATCH_SIZE = 64*1024;//maximum total size of blocks to move between a thread cache and a central cache in one shot (corresponds to half size of thread cache of each size class)
-static const unsigned int MAX_BLOCK_SIZE = CHUNK_SIZE;//requesting memory of any size greater than this value will lead to direct call of system virtual memory allocation routine
-
-//Platform-specific stuff
-
-#ifdef __cplusplus
-#define CPPCODE(code) code
-#include <new>
-#else
-#define CPPCODE(code)
-#endif
-
-#ifdef LTALLOC_AUTO_GC_INTERVAL
-#include <time.h>
-#	if			LTALLOC_AUTO_GC_INTERVAL <= 0
-#		undef	LTALLOC_AUTO_GC_INTERVAL 
-#		define	LTALLOC_AUTO_GC_INTERVAL 3.00
-#	endif
-#endif
-
-#ifdef __GNUC__
-
-#define __STDC_LIMIT_MACROS
-#include <stdint.h> //for SIZE_MAX
-#include <limits.h> //for UINT_MAX
-#define alignas(a) __attribute__((aligned(a)))
-#define thread_local __thread
-#define NOINLINE __attribute__((noinline))
-#define CAS_LOCK(lock) __sync_lock_test_and_set(lock, 1)
-#define SPINLOCK_RELEASE(lock) __sync_lock_release(lock)
-#define PAUSE __asm__ __volatile__("pause" ::: "memory")
-#define BSR(r, v) r = CODE3264(__builtin_clz(v) ^ 31, __builtin_clzll(v) ^ 63)//x ^ 31 = 31 - x, but gcc does not optimize 31 - __builtin_clz(x) to bsr(x), but generates 31 - (bsr(x) ^ 31)
-
-#elif _MSC_VER
-
-#define _ALLOW_KEYWORD_MACROS
-#include <limits.h> //for SIZE_MAX and UINT_MAX
-#define alignas(a) __declspec(align(a))
-#define thread_local __declspec(thread)
-#define NOINLINE __declspec(noinline)
-#define CAS_LOCK(lock) _InterlockedExchange((long*)lock, 1)
-#define SPINLOCK_RELEASE(lock) _InterlockedExchange((long*)lock, 0)
-#define PAUSE _mm_pause()
-#define BSR(r, v) CODE3264(_BitScanReverse, _BitScanReverse64)((unsigned long*)&r, v)
-CPPCODE(extern "C") long _InterlockedExchange(long volatile *, long);
-CPPCODE(extern "C") void _mm_pause();
-#pragma warning(disable: 4127 4201 4324 4290)//"conditional expression is constant", "nonstandard extension used : nameless struct/union", and "structure was padded due to __declspec(align())"
-
-#else
-#error Unsupported compiler
-#endif
-
-#if __GNUC__ || __INTEL_COMPILER
-#define likely(x) __builtin_expect(!!(x), 1)
-#define unlikely(x) __builtin_expect(!!(x), 0)
-#else
-#define likely(x) (x)
-#define unlikely(x) (x)
-#endif
-
-static void SPINLOCK_ACQUIRE(volatile int *lock) {if (CAS_LOCK(lock)) while (*lock || CAS_LOCK(lock)) PAUSE;}
-
-#include <assert.h>
-#include <string.h> //for memset
-
-#if SIZE_MAX == UINT_MAX
-#define CODE3264(c32, c64) c32
-#else
-#define CODE3264(c32, c64) c64
-#endif
-typedef char CODE3264_check[sizeof(void*) == CODE3264(4, 8) ? 1 : -1];
-
-#ifdef _WIN32
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>
-
-#define VMALLOC(size) VirtualAlloc(NULL, size, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE)
-#define VMFREE(p, size) VirtualFree(p, 0, MEM_RELEASE)
-
-#else
-
-#include <sys/mman.h>
-#include <unistd.h>
-
-#define VMALLOC(size) (void*)(((uintptr_t)mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0)+1)&~1)//with the conversion of MAP_FAILED to 0
-#define VMFREE(p, size) munmap(p, size)
-
-static size_t page_size()
-{
-	assert((uintptr_t)MAP_FAILED+1 == 0);//have to use dynamic check somewhere, because some gcc versions (e.g. 4.4.5) won't compile typedef char MAP_FAILED_value_static_check[(uintptr_t)MAP_FAILED+1 == 0 ? 1 : -1];
-	static size_t pagesize = 0;
-	if (!pagesize) pagesize = sysconf(_SC_PAGE_SIZE);//assuming that writing of size_t value is atomic, so this can be done safely in different simultaneously running threads
-	return pagesize;
-}
-
-typedef struct PTrieNode            // Compressed radix tree (patricia trie) for storing sizes of system allocations
-{                                   // This implementation have some specific properties:
-    uintptr_t keys[2];              // 1. There are no separate leaf nodes (with both null children), as leaf's value is stored directly in place of corresponding child node pointer. Least significant bit of that pointer used to determine its meaning (i.e., is it a value, or child node pointer).
-    struct PTrieNode *childNodes[2];// 2. Inserting a new element (key/value) into this tree require to create always an exactly one new node (and similarly for remove key/node operation).
-} PTrieNode;                        // 3. Tree always contains just one node with null child (i.e. all but one nodes in any possible tree are always have two children).
-#define PTRIE_NULL_NODE (PTrieNode*)(uintptr_t)1
-static PTrieNode *ptrieRoot = PTRIE_NULL_NODE, *ptrieFreeNodesList = NULL, *ptrieNewAllocatedPage = NULL;
-static volatile int ptrieLock = 0;
-
-static uintptr_t ptrie_lookup(uintptr_t key)
-{
-	PTrieNode *node = ptrieRoot;
-	uintptr_t *lastKey = NULL;
-	while (!((uintptr_t)node & 1))
-	{
-		int branch = (key >> (node->keys[0] & 0xFF)) & 1;
-		lastKey = &node->keys[branch];
-		node = node->childNodes[branch];
-	}
-	assert(lastKey && (*lastKey & ~0xFF) == key);
-	return (uintptr_t)node & ~1;
-}
-
-static void ptrie_insert(uintptr_t key, uintptr_t value, PTrieNode *newNode/* = (PTrieNode*)malloc(sizeof(PTrieNode))*/)
-{
-	PTrieNode **node = &ptrieRoot, *n;
-	uintptr_t *prevKey = NULL, x, pkey;
-	unsigned int index, b;
-	assert(!((value & 1) | (key & 0xFF)));//check constraints for key/value
-	for (;;)
-	{
-		n = *node;
-		if (!((uintptr_t)n & 1))//not a leaf
-		{
-			int prefixEnd = n->keys[0] & 0xFF;
-			x = key ^ n->keys[0];// & ~0xFF;
-			if (!(x & (~(uintptr_t)1 << prefixEnd))) {//prefix matches, so go on
-				int branch = (key >> prefixEnd) & 1;
-				node = &n->childNodes[branch];
-				prevKey = &n->keys[branch];
-			} else {//insert a new node before current
-				pkey = n->keys[0] & ~0xFF;
-				break;
-			}
-		} else {//leaf
-			if (*node == PTRIE_NULL_NODE) {
-				*node = newNode;
-				newNode->keys[0] = key;//left prefixEnd = 0, so all following insertions will be before this node
-				newNode->childNodes[0] = (PTrieNode*)(value | 1);
-				newNode->childNodes[1] = PTRIE_NULL_NODE;
-				return;
-			} else {
-				pkey = *prevKey & ~0xFF;
-				x = key ^ pkey;
-				assert(x/*key != pkey*/ && "key already inserted");
-				break;
-			}
-		}
-	}
-	BSR(index, x);
-	b = (key >> index) & 1;
-	newNode->keys[b] = key;
-	newNode->keys[b^1] = pkey;
-	newNode->keys[0] |= index;
-	newNode->childNodes[b] = (PTrieNode*)(value | 1);
-	newNode->childNodes[b^1] = n;
-	*node = newNode;
-}
-
-static uintptr_t ptrie_remove(uintptr_t key)
-{
-	PTrieNode **node = &ptrieRoot;
-	uintptr_t *pkey = NULL;
-	assert(ptrieRoot != PTRIE_NULL_NODE && "trie is empty!");
-	for (;;)
-	{
-		PTrieNode *n = *node;
-		int branch = (key >> (n->keys[0] & 0xFF)) & 1;
-		PTrieNode *cn = n->childNodes[branch];//current child node
-		if ((uintptr_t)cn & 1)//leaf
-		{
-			PTrieNode *other = n->childNodes[branch^1];
-			assert((n->keys[branch] & ~0xFF) == key);
-			assert(cn != PTRIE_NULL_NODE && "node's key is probably broken");
-		//	if (other == PTRIE_NULL_NODE) *node = PTRIE_NULL_NODE; else//special handling for null child nodes is not necessary
-			if (((uintptr_t)other & 1) && other != PTRIE_NULL_NODE)//if other node is not a pointer
-				*pkey = (n->keys[branch^1] & ~0xFF) | ((*pkey) & 0xFF);
-			*node = other;
-			*(PTrieNode**)n = ptrieFreeNodesList; ptrieFreeNodesList = n;//free(n);
-			return (uintptr_t)cn & ~1;
-		}
-		pkey = &n->keys[branch];
-		node = &n->childNodes[branch];
-	}
-}
-#endif
-
-static void *sys_aligned_alloc(size_t alignment, size_t size)
-{
-	void *p = VMALLOC(size);//optimistically try mapping precisely the right amount before falling back to the slow method
-	assert(!(alignment & (alignment-1)) && "alignment must be a power of two");
-	if ((uintptr_t)p & (alignment-1)/* && p != MAP_FAILED*/)
-	{
-		VMFREE(p, size);
-#ifdef _WIN32
-		{static DWORD allocationGranularity = 0;
-		if (!allocationGranularity) {
-			SYSTEM_INFO si;
-			GetSystemInfo(&si);
-			allocationGranularity = si.dwAllocationGranularity;
-		}
-		if ((uintptr_t)p < 16*1024*1024)//fill "bubbles" (reserve unaligned regions) at the beginning of virtual address space, otherwise there will be always falling back to the slow method
-			VirtualAlloc(p, alignment - ((uintptr_t)p & (alignment-1)), MEM_RESERVE, PAGE_NOACCESS);
-		do
-		{
-			p = VirtualAlloc(NULL, size + alignment - allocationGranularity, MEM_RESERVE, PAGE_NOACCESS);
-			if (p == NULL) return NULL;
-			VirtualFree(p, 0, MEM_RELEASE);//unfortunately, WinAPI doesn't support release a part of allocated region, so release a whole region
-			p = VirtualAlloc((void*)(((uintptr_t)p + (alignment-1)) & ~(alignment-1)), size, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE);
-		} while (p == NULL);}
-#else
-		p = VMALLOC(size + alignment - page_size());
-		if (p/* != MAP_FAILED*/)
-		{
-			uintptr_t ap = ((uintptr_t)p + (alignment-1)) & ~(alignment-1);
-			uintptr_t diff = ap - (uintptr_t)p;
-			if (diff) VMFREE(p, diff);
-			diff = alignment - page_size() - diff;
-			assert((intptr_t)diff >= 0);
-			if (diff) VMFREE((void*)(ap + size), diff);
-			return (void*)ap;
-		}
-#endif
-	}
-	//if (p == 0) p = sys_aligned_alloc(alignment, size);//just in case (because 0 pointer is handled specially elsewhere)
-	//if (p == MAP_FAILED) p = NULL;
-	return p;
-}
-
-static NOINLINE void sys_free(void *p)
-{
-	if (p == NULL) return;
-#ifdef _WIN32
-	VirtualFree(p, 0, MEM_RELEASE);
-#else
-	SPINLOCK_ACQUIRE(&ptrieLock);
-	size_t size = ptrie_remove((uintptr_t)p);
-	SPINLOCK_RELEASE(&ptrieLock);
-	munmap(p, size);
-#endif
-}
-
-static void release_thread_cache(void*);
-#ifdef __GNUC__
-#include <pthread.h>
-#pragma weak pthread_once
-#pragma weak pthread_key_create
-#pragma weak pthread_setspecific
-static pthread_key_t pthread_key;
-static pthread_once_t init_once = PTHREAD_ONCE_INIT;
-static void init_pthread_key() { pthread_key_create(&pthread_key, release_thread_cache); }
-static thread_local int thread_initialized = 0;
-static void init_pthread_destructor()//must be called only when some block placed into a thread cache's free list
-{
-	if (unlikely(!thread_initialized))
-	{
-		thread_initialized = 1;
-		if (pthread_once)
-		{
-			pthread_once(&init_once, init_pthread_key);
-			pthread_setspecific(pthread_key, (void*)1);//set nonzero value to force calling of release_thread_cache() on thread terminate
-		}
-	}
-}
-#else
-static void NTAPI on_tls_callback(PVOID h, DWORD reason, PVOID pv) { h; pv; if (reason == DLL_THREAD_DETACH) release_thread_cache(0); }
-#pragma comment(linker, "/INCLUDE:" CODE3264("_","") "p_thread_callback_ltalloc")
-#pragma const_seg(".CRT$XLL")
-extern CPPCODE("C") const PIMAGE_TLS_CALLBACK p_thread_callback_ltalloc = on_tls_callback;
-#pragma const_seg()
-#define init_pthread_destructor()
-#endif
-
-//End of platform-specific stuff
-
-#define MAX_BLOCK_SIZE (MAX_BLOCK_SIZE < CHUNK_SIZE - (CHUNK_SIZE >> (1 + LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)) ? \
-                        MAX_BLOCK_SIZE : CHUNK_SIZE - (CHUNK_SIZE >> (1 + LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)))
-#define NUMBER_OF_SIZE_CLASSES ((sizeof(void*)*8 + 1) << LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)
-
-typedef struct FreeBlock
-{
-	struct FreeBlock *next,
-					 *nextBatch;//in the central cache blocks are organized into batches to allow fast moving blocks from thread cache and back
-} FreeBlock;
-
-typedef struct alignas(CACHE_LINE_SIZE) ChunkBase//force sizeof(Chunk) = cache line size to avoid false sharing
-{
-	unsigned int sizeClass;
-} Chunk;
-
-typedef struct alignas(CACHE_LINE_SIZE) ChunkSm//chunk of smallest blocks of size = sizeof(void*)
-{
-	unsigned int sizeClass;//struct ChunkBase chunk;
-	struct ChunkSm *prev, *next;
-	int numBatches;
-#define NUM_OF_BATCHES_IN_CHUNK_SM CHUNK_SIZE/(sizeof(void*)*MAX_NUM_OF_BLOCKS_IN_BATCH)
-	FreeBlock *batches[NUM_OF_BATCHES_IN_CHUNK_SM];//batches of blocks inside ChunkSm have to be stored separately (as smallest blocks of size = sizeof(void*) do not have enough space to store second pointer for the batch)
-} ChunkSm;
-
-typedef struct alignas(CACHE_LINE_SIZE)//align needed to prevent cache line sharing between adjacent classes accessed from different threads
-{
-	volatile int lock;
-	unsigned int freeBlocksInLastChunk;
-	char *lastChunk;//Chunk or ChunkSm
-	union {
-		FreeBlock *firstBatch;
-		ChunkSm *chunkWithFreeBatches;
-	};
-	FreeBlock *freeList;//short list of free blocks that for some reason are not organized into batches
-	unsigned int freeListSize;//should be less than batch size
-	uintptr_t minChunkAddr, maxChunkAddr;
-} CentralCache;
-static CentralCache centralCache[NUMBER_OF_SIZE_CLASSES];// = {{0}};
-
-typedef struct
-{
-	FreeBlock *freeList;
-	FreeBlock *tempList;//intermediate list providing a hysteresis in order to avoid a corner case of too frequent moving free blocks to the central cache and back from
-	int counter;//number of blocks in freeList (used to determine when to move free blocks list to the central cache)
-} ThreadCache;
-static thread_local ThreadCache threadCache[NUMBER_OF_SIZE_CLASSES];// = {{0}};
-
-static struct
-{
-	volatile int lock;
-	void *freeChunk;
-	size_t size;
-} pad = {0, NULL, 0};
-
-static CPPCODE(inline) unsigned int get_size_class(size_t size)
-{
-	unsigned int index;
-#if _MSC_VER && LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO == 2
-	static const unsigned char small_size_classes[256] = {//have to use a const array here, because MS compiler unfortunately does not evaluate _BitScanReverse with a constant argument at compile time (as gcc does for __builtin_clz)
-#if CODE3264(1, 0)
-		131, 4, 15, 17, 19, 20, 21, 22, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 32, 32, 32, 32, 32, 32, 32, 32, 33, 33, 33, 33, 33, 33, 33, 33, 34, 34, 34, 34, 34, 34, 34, 34, 35, 35, 35, 35, 35, 35, 35, 35, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43
-#else
-		131, 15, 19, 21, 23, 24, 25, 26, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35, 36, 36, 36, 36, 36, 36, 36, 36, 37, 37, 37, 37, 37, 37, 37, 37, 38, 38, 38, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 39, 39, 39, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 43, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47
-#endif
-	};
-	if (size < 256 * sizeof(void*) - (sizeof(void*)-1))
-		return small_size_classes[(size + (sizeof(void*)-1)) / sizeof(void*)];
-#endif
-
-	size = (size + (sizeof(void*)-1)) & ~(sizeof(void*)-1);//minimum block size is sizeof(void*), doing this is better than just "size = max(size, sizeof(void*))"
-
-	BSR(index, (size-1)|1);//"|1" needed because result of BSR is undefined for zero input
-#if LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO == 0
-	return index;
-#else
-	return (index<<LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO) + (unsigned int)((size-1) >> (index-LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO));
-#endif
-}
-
-static unsigned int class_to_size(unsigned int c)
-{
-#if LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO == 0
-	return 2 << c;
-#else
-#if LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO >= CODE3264(2, 3)
-	if (unlikely(c < (LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO<<LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)))//for block sizes less than or equal to pow(2, LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)
-		return 2 << (c>>LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO);
-	else
-#endif
-	{
-		c -= (1<<LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)-1;
-		return ((c & ((1<<LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)-1)) | (1<<LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)) << ((c>>LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)-LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO);
-	}
-#endif
-}
-
-static unsigned int batch_size(unsigned int sizeClass)//calculates a number of blocks to move between a thread cache and a central cache in one shot
-{
-	return ((MAX_BATCH_SIZE-1) >> (sizeClass >> LTALLOC_SIZE_CLASSES_SUBPOWER_OF_TWO)) & (MAX_NUM_OF_BLOCKS_IN_BATCH-1);
-}
-
-CPPCODE(template <bool> static) void *ltmalloc(size_t size);
-
-CPPCODE(template <bool throw_>) static void *fetch_from_central_cache(size_t size, ThreadCache *tc, unsigned int sizeClass)
-{
-	void *p;
-	if (likely(size-1u <= MAX_BLOCK_SIZE-1u))//<=> if (size <= MAX_BLOCK_SIZE && size != 0)
-	{
-		FreeBlock *fb = tc->tempList;
-		if (fb)
-		{
-			assert(tc->counter == (int)batch_size(sizeClass)+1);
-			tc->counter = 1;
-			tc->freeList = fb->next;
-			tc->tempList = NULL;
-			return fb;
-		}
-
-		assert(tc->counter == 0 || tc->counter == (int)batch_size(sizeClass)+1);
-		tc->counter = 1;
-
-		{CentralCache *cc = &centralCache[sizeClass];
-		SPINLOCK_ACQUIRE(&cc->lock);
-		if (unlikely(!cc->firstBatch))//no free batch
-		{no_free_batch:{
-			unsigned int batchSize = batch_size(sizeClass)+1;
-
-			if (cc->freeList)
-			{
-				assert(cc->freeListSize);
-				if (likely(cc->freeListSize <= batchSize + 1))
-				{
-					tc->counter = batchSize - cc->freeListSize + 1;
-				//	batchSize = cc->freeListSize;
-					cc->freeListSize = 0;
-					fb = cc->freeList;
-					cc->freeList = NULL;
-				}
-				else
-				{
-					cc->freeListSize -= batchSize;
-					fb = cc->freeList;
-					{FreeBlock *b = cc->freeList;
-					while (--batchSize) b = b->next;
-					cc->freeList = b->next;
-					b->next = NULL;}
-				}
-				SPINLOCK_RELEASE(&cc->lock);
-				tc->freeList = fb->next;
-				init_pthread_destructor();//this call must be placed carefully to allow recursive memory allocation from pthread_key_create (in case when ltalloc replaces the system malloc)
-				return fb;
-			}
-
-			{unsigned int blockSize = class_to_size(sizeClass);
-			if (cc->freeBlocksInLastChunk)
-			{
-				char *firstFree = cc->lastChunk;
-				assert(cc->lastChunk && cc->freeBlocksInLastChunk == (CHUNK_SIZE - ((uintptr_t)cc->lastChunk & (CHUNK_SIZE-1)))/blockSize);
-				if (cc->freeBlocksInLastChunk < batchSize) {
-					tc->counter = batchSize - cc->freeBlocksInLastChunk + 1;
-					batchSize = cc->freeBlocksInLastChunk;
-				}
-				cc->freeBlocksInLastChunk -= batchSize;
-				cc->lastChunk += blockSize * batchSize;
-				if (cc->freeBlocksInLastChunk == 0) {
-					assert(((uintptr_t)cc->lastChunk & (CHUNK_SIZE-1)) == 0);
-					cc->lastChunk = ((char**)cc->lastChunk)[-1];
-					if (cc->lastChunk)
-						cc->freeBlocksInLastChunk = (CHUNK_SIZE - ((uintptr_t)cc->lastChunk & (CHUNK_SIZE-1)))/blockSize;
-				}
-				SPINLOCK_RELEASE(&cc->lock);
-				fb = (FreeBlock*)firstFree;
-				while (--batchSize)
-					firstFree = (char*)(((FreeBlock*)firstFree)->next = (FreeBlock*)(firstFree + blockSize));
-				((FreeBlock*)firstFree)->next = NULL;
-				tc->freeList = fb->next;
-				init_pthread_destructor();
-				return fb;
-			}
-
-			//Allocate new chunk
-			SPINLOCK_RELEASE(&cc->lock);//release lock for a while
-
-			SPINLOCK_ACQUIRE(&pad.lock);
-			if (pad.freeChunk)
-			{
-				p = pad.freeChunk;
-				pad.freeChunk = *(void**)p;
-				pad.size -= CHUNK_SIZE;
-				SPINLOCK_RELEASE(&pad.lock);
-				((char**)((char*)p + CHUNK_SIZE))[-1] = 0;
-			} else {
-				SPINLOCK_RELEASE(&pad.lock);
-				p = sys_aligned_alloc(CHUNK_SIZE, CHUNK_SIZE);
-				if (unlikely(!p)) { CPPCODE(if (throw_) throw std::bad_alloc(); else) return NULL; }
-			}
-
-#define CHUNK_IS_SMALL unlikely(sizeClass < get_size_class(2*sizeof(void*)))
-			{unsigned int numBlocksInChunk = (CHUNK_SIZE - (CHUNK_IS_SMALL ? sizeof(ChunkSm) : sizeof(Chunk)))/blockSize;
-#ifndef _WIN32
-			//intptr_t sz = ((CHUNK_SIZE - numBlocksInChunk*blockSize) & ~(page_size()-1)) - page_size();
-			//if (sz > 0) mprotect((char*)p + page_size(), sz, PROT_NONE);//munmap((char*)p + page_size(), sz);//to make possible unmapping, we need to be more careful when returning memory to the system, not simply VMFREE(firstFreeChunk, CHUNK_SIZE), so let there be just mprotect
-#endif
-			assert(((char**)((char*)p + CHUNK_SIZE))[-1] == 0);//assume that allocated memory is always zero filled (on first access); it is better not to zero it explicitly because it will lead to allocation of physical page which may never needed otherwise
-			if (numBlocksInChunk < batchSize) {
-				tc->counter = batchSize - numBlocksInChunk + 1;
-				batchSize = numBlocksInChunk;
-			}
-
-			//Prepare chunk
-			((Chunk*)p)->sizeClass = sizeClass;
-			{char *firstFree = (char*)p + CHUNK_SIZE - numBlocksInChunk*blockSize;//blocks in chunk are located in such way to achieve a maximum possible alignment
-			fb = (FreeBlock*)firstFree;
-			{int n = batchSize; while (--n)
-				firstFree = (char*)(((FreeBlock*)firstFree)->next = (FreeBlock*)(firstFree + blockSize));}
-			((FreeBlock*)firstFree)->next = NULL;
-			firstFree += blockSize;
-
-			SPINLOCK_ACQUIRE(&cc->lock);
-			if ((uintptr_t)p < cc->minChunkAddr || !cc->minChunkAddr) cc->minChunkAddr = (uintptr_t)p;
-			if ((uintptr_t)p > cc->maxChunkAddr                     ) cc->maxChunkAddr = (uintptr_t)p;
-
-			if (CHUNK_IS_SMALL)//special handling for smallest blocks of size = sizeof(void*)
-			{
-				ChunkSm *cs = (ChunkSm*)p;
-				cs->numBatches = 0;
-				//Insert new chunk right after chunkWithFreeBatches
-				cs->prev = cc->chunkWithFreeBatches;
-				if (cc->chunkWithFreeBatches) {
-					cs->next = cc->chunkWithFreeBatches->next;
-					if (cc->chunkWithFreeBatches->next) cc->chunkWithFreeBatches->next->prev = cs;
-					cc->chunkWithFreeBatches->next = cs;
-				} else {
-					cs->next = NULL;
-					cc->chunkWithFreeBatches = cs;
-				}
-			}
-
-			if (unlikely(cc->freeBlocksInLastChunk))//so happened that other thread have already allocated chunk for the same size class while the lock was released
-			{
-				//Hook pointer to the current lastChunk at the end of new chunk (another way is just put all blocks to cc->freeList which is much less effecient)
-				((char**)(((uintptr_t)firstFree & ~(CHUNK_SIZE-1)) + CHUNK_SIZE))[-1] = cc->lastChunk;
-			}
-			cc->freeBlocksInLastChunk = numBlocksInChunk - batchSize;
-			cc->lastChunk = firstFree;
-		}}}}}
-		else {
-			if (!CHUNK_IS_SMALL)//smallest blocks of size = sizeof(void*) are handled specially
-			{
-				fb = cc->firstBatch;
-				cc->firstBatch = fb->nextBatch;
-			}
-			else//size of block = sizeof(void*)
-			{
-				ChunkSm *cs = cc->chunkWithFreeBatches;
-				if (unlikely(cs->numBatches == 0))
-				{
-					if (unlikely(cs->prev == NULL)) goto no_free_batch;
-					cs = cc->chunkWithFreeBatches = cs->prev;
-					assert(cs->numBatches == NUM_OF_BATCHES_IN_CHUNK_SM);
-				}
-				fb = cs->batches[--cs->numBatches];
-			}
-		}
-		SPINLOCK_RELEASE(&cc->lock);}
-		tc->freeList = fb->next;
-		init_pthread_destructor();
-		return fb;
-	}
-	else//allocate block directly from the system
-	{
-		if (unlikely(size == 0)) return ltmalloc CPPCODE(<throw_>)(1);//return NULL;//doing this check here is better than on the top level
-
-		size = (size + CHUNK_SIZE-1) & ~(CHUNK_SIZE-1);
-		p = sys_aligned_alloc(CHUNK_SIZE, size);
-#ifndef _WIN32
-		if (p) {
-			SPINLOCK_ACQUIRE(&ptrieLock);
-			PTrieNode *newNode;
-			if (ptrieFreeNodesList)
-				ptrieFreeNodesList = *(PTrieNode**)(newNode = ptrieFreeNodesList);
-			else if (ptrieNewAllocatedPage) {
-				newNode = ptrieNewAllocatedPage;
-				if (!((uintptr_t)++ptrieNewAllocatedPage & (page_size()-1)))
-					ptrieNewAllocatedPage = ((PTrieNode**)ptrieNewAllocatedPage)[-1];
-			} else {
-				SPINLOCK_RELEASE(&ptrieLock);
-				newNode = (PTrieNode*)VMALLOC(page_size());
-				if (unlikely(!newNode)) { CPPCODE(if (throw_) throw std::bad_alloc(); else) return NULL; }
-				assert(((char**)((char*)newNode + page_size()))[-1] == 0);
-				SPINLOCK_ACQUIRE(&ptrieLock);
-				((PTrieNode**)((char*)newNode + page_size()))[-1] = ptrieNewAllocatedPage;//in case if other thread also have just allocated a new page
-				ptrieNewAllocatedPage = newNode + 1;
-			}
-			ptrie_insert((uintptr_t)p, size, newNode);
-			SPINLOCK_RELEASE(&ptrieLock);
-		}
-#endif
-		CPPCODE(if (throw_) if (unlikely(!p)) throw std::bad_alloc();)
-		return p;
-	}
-}
-
-CPPCODE(template <bool throw_> static) void *ltmalloc(size_t size)
-{
-	unsigned int sizeClass = get_size_class(size);
-	ThreadCache *tc = &threadCache[sizeClass];
-	FreeBlock *fb = tc->freeList;
-	if (likely(fb))
-	{
-		tc->freeList = fb->next;
-		tc->counter++;
-		return fb;
-	}
-	else
-		return fetch_from_central_cache CPPCODE(<throw_>)(size, tc, sizeClass);
-}
-CPPCODE(void *ltmalloc(size_t size) {return ltmalloc<false>(size);})//for possible external usage
-
-static void add_batch_to_central_cache(CentralCache *cc, unsigned int sizeClass, FreeBlock *batch)
-{
-	if (!CHUNK_IS_SMALL)
-	{
-		batch->nextBatch = cc->firstBatch;
-		cc->firstBatch = batch;
-	}
-	else
-	{
-		ChunkSm *cs = cc->chunkWithFreeBatches;
-		if (unlikely(cs->numBatches == NUM_OF_BATCHES_IN_CHUNK_SM))
-		{
-			cs = cc->chunkWithFreeBatches = cc->chunkWithFreeBatches->next;
-			assert(cs && cs->numBatches == 0);
-		}
-		cs->batches[cs->numBatches++] = batch;
-	}
-}
-
-static NOINLINE void move_to_central_cache(ThreadCache *tc, unsigned int sizeClass)
-{
-	init_pthread_destructor();//needed for cases when freed memory was allocated in the other thread and no alloc was called in this thread till its termination
-
-	tc->counter = batch_size(sizeClass);
-	if (tc->tempList)//move temp list to the central cache
-	{
-		CentralCache *cc = &centralCache[sizeClass];
-		SPINLOCK_ACQUIRE(&cc->lock);
-		add_batch_to_central_cache(cc, sizeClass, tc->tempList);
-		SPINLOCK_RELEASE(&cc->lock);
-	}
-// 	else if (unlikely(!tc->freeList))//this is a first call (i.e. when counter = 0) - just initialization of counter needed
-// 	{
-// 		tc->counter--;
-// 		return;
-// 	}
-
-	tc->tempList = tc->freeList;
-	tc->freeList = NULL;
-}
-
-void ltfree(void *p)
-{
-	if (likely((uintptr_t)p & (CHUNK_SIZE-1)))
-	{
-		unsigned int sizeClass = ((Chunk*)((uintptr_t)p & ~(CHUNK_SIZE-1)))->sizeClass;
-		ThreadCache *tc = &threadCache[sizeClass];
-
-		if (unlikely(--tc->counter < 0))
-			move_to_central_cache(tc, sizeClass);
-
-		((FreeBlock*)p)->next = tc->freeList;
-		tc->freeList = (FreeBlock*)p;
-	}
-	else
-		sys_free(p);
-}
-
-size_t ltmsize(void *p)
-{
-	if (likely((uintptr_t)p & (CHUNK_SIZE-1)))
-	{
-		return class_to_size(((Chunk*)((uintptr_t)p & ~(CHUNK_SIZE-1)))->sizeClass);
-	}
-	else
-	{
-		if (p == NULL) return 0;
-#ifdef _WIN32
-		{MEMORY_BASIC_INFORMATION mi;
-		VirtualQuery(p, &mi, sizeof(mi));
-		return mi.RegionSize;}
-#else
-		SPINLOCK_ACQUIRE(&ptrieLock);
-		size_t size = ptrie_lookup((uintptr_t)p);
-		SPINLOCK_RELEASE(&ptrieLock);
-		return size;
-#endif
-	}
-}
-
-static void release_thread_cache(void *p)
-{
-	unsigned int sizeClass = 0; (void)p;
-	for (;sizeClass < NUMBER_OF_SIZE_CLASSES; sizeClass++)
-	{
-		ThreadCache *tc = &threadCache[sizeClass];
-		if (tc->freeList || tc->tempList)
-		{
-			FreeBlock *tail = tc->freeList;
-			unsigned int freeListSize = 1;
-			CentralCache *cc = &centralCache[sizeClass];
-
-			if (tail)
-				while (tail->next)//search for end of list
-					tail = tail->next, freeListSize++;
-
-			SPINLOCK_ACQUIRE(&cc->lock);
-			if (tc->tempList)
-				add_batch_to_central_cache(cc, sizeClass, tc->tempList);
-			if (tc->freeList) {//append tc->freeList to cc->freeList
-				tail->next = cc->freeList;
-				cc->freeList = tc->freeList;
-				assert(freeListSize == batch_size(sizeClass)+1 - tc->counter);
-				cc->freeListSize += freeListSize;
-			}
-			SPINLOCK_RELEASE(&cc->lock);
-		}
-	}
-}
-
-void ltsqueeze(size_t padsz)
-{
-	unsigned int sizeClass = get_size_class(2*sizeof(void*));//skip small chunks because corresponding batches can not be efficiently detached from the central cache (if that becomes relevant, may be it worths to reimplement batches for small chunks from array to linked lists)
-	for (;sizeClass < NUMBER_OF_SIZE_CLASSES; sizeClass++)
-	{
-		CentralCache *cc = &centralCache[sizeClass];
-		if (cc->maxChunkAddr - cc->minChunkAddr <= CHUNK_SIZE)//preliminary check without lock (assume that writing to minChunkAddr/maxChunkAddr is atomic)
-			continue;
-
-		SPINLOCK_ACQUIRE(&cc->lock);
-		if (cc->maxChunkAddr - cc->minChunkAddr <= CHUNK_SIZE) {//quick check for theoretical possibility that at least one chunk is totally free
-			SPINLOCK_RELEASE(&cc->lock);
-			continue;
-		}
-		{uintptr_t minChunkAddr = cc->minChunkAddr;
-		size_t bufferSize = ((cc->maxChunkAddr - minChunkAddr) / CHUNK_SIZE + 1) * sizeof(short);
-		//Quickly detach all batches of the current size class from the central cache
-		unsigned int freeListSize = cc->freeListSize;
-		FreeBlock *firstBatch = cc->firstBatch, *freeList = cc->freeList;
-		cc->firstBatch = NULL;
-		cc->freeList = NULL;
-		cc->freeListSize = 0;
-		SPINLOCK_RELEASE(&cc->lock);
-
-		//1. Find out chunks with only free blocks via a simple counting the number of free blocks in each chunk
-		{char buffer[32*1024];//enough for 1GB address space
-		unsigned short *inChunkFreeBlocks = (unsigned short*)(bufferSize <= sizeof(buffer) ? memset(buffer, 0, bufferSize) : VMALLOC(bufferSize));
-		unsigned int numBlocksInChunk = (CHUNK_SIZE - (/*CHUNK_IS_SMALL ? sizeof(ChunkSm) : */sizeof(Chunk)))/class_to_size(sizeClass);
-		FreeBlock **pbatch, *block, **pblock;
-		Chunk *firstFreeChunk = NULL;
-		assert(numBlocksInChunk < (1U<<(sizeof(short)*8)));//in case if CHUNK_SIZE is too big that total count of blocks in it doesn't fit at short type (...may be use static_assert instead?)
-		if (inChunkFreeBlocks)//consider VMALLOC can fail
-		{
-			for (pbatch = &firstBatch; *pbatch; pbatch = &(*pbatch)->nextBatch)
-				for (block = *pbatch; block; block = block->next)
-#define FREE_BLOCK(block) \
-					if (++inChunkFreeBlocks[((uintptr_t)block - minChunkAddr) / CHUNK_SIZE] == numBlocksInChunk)/*chunk is totally free*/\
-					{\
-						Chunk *chunk = (Chunk*)((uintptr_t)block & ~(CHUNK_SIZE-1));\
-						assert(chunk->sizeClass == sizeClass);/*just in case check before overwriting this info*/\
-						*(Chunk**)chunk = firstFreeChunk;/*put nextFreeChunk pointer right at the beginning of Chunk as there are always must be a space for one pointer before first memory block*/\
-						firstFreeChunk = chunk;\
-					}
-				FREE_BLOCK(block)
-			for (pblock = &freeList; *pblock; pblock = &(*pblock)->next)
-				FREE_BLOCK(*pblock)
-#undef FREE_BLOCK
-		}
-		else {
-			for (pbatch = &firstBatch; *pbatch; pbatch = &(*pbatch)->nextBatch);
-			for (pblock = &freeList; *pblock; pblock = &(*pblock)->next);
-		}
-
-		if (firstFreeChunk)//is anything to release
-		{
-			//2. Unlink all matching blocks from the corresponding free lists
-			FreeBlock *additionalBatchesList = NULL, *additionalBlocksList = NULL, **abatch = &additionalBatchesList, **ablock = &additionalBlocksList;
-			unsigned int additionalBlocksListSize = 0, batchSize = batch_size(sizeClass)+1;
-			for (pbatch = &firstBatch; *pbatch;)
-			{
-				for (block = *pbatch; block; block = block->next)
-					if (inChunkFreeBlocks[((uintptr_t)block - minChunkAddr) / CHUNK_SIZE] == numBlocksInChunk)//if at least one block belongs to a releasable chunk, then this batch should be handled specially
-					{
-						FreeBlock *nextBatch = (*pbatch)->nextBatch;
-						for (block = *pbatch; block;)//re-add blocks of not-for-release chunks and organize them into another batches' list (to join it with the main later)
-							if (inChunkFreeBlocks[((uintptr_t)block - minChunkAddr) / CHUNK_SIZE] != numBlocksInChunk)//skip matching-for-release blocks
-							{
-								*ablock = block;
-								do//this loop needed only to minimize memory write operations, otherwise a simpler approach could be used (like in the next loop below)
-								{
-									ablock = &block->next;
-									block = block->next;
-									if (++additionalBlocksListSize == batchSize)
-									{
-										abatch = &(*abatch = additionalBlocksList)->nextBatch;
-										*abatch = NULL;
-										*ablock = NULL;
-										ablock = &additionalBlocksList;
-										additionalBlocksList = NULL;
-										additionalBlocksListSize = 0;
-										break;//to force *ablock = block; for starting a new batch
-									}
-								} while (block && inChunkFreeBlocks[((uintptr_t)block - minChunkAddr) / CHUNK_SIZE] != numBlocksInChunk);
-							}
-							else
-								block = block->next;
-						*ablock = NULL;
-						*pbatch = nextBatch;//unlink batch
-						goto continue_;
-					}
-				pbatch = &(*pbatch)->nextBatch;
-continue_:;
-			}
-			for (block = freeList; block;)
-				if (inChunkFreeBlocks[((uintptr_t)block - minChunkAddr) / CHUNK_SIZE] != numBlocksInChunk)
-				{
-					//*pblock = (*pblock)->next, freeListSize--;//unlink block
-					ablock = &(*ablock = block)->next;
-					block = block->next;
-					*ablock = NULL;
-					if (++additionalBlocksListSize == batchSize)
-					{
-						abatch = &(*abatch = additionalBlocksList)->nextBatch;
-						*abatch = NULL;
-						ablock = &additionalBlocksList;
-						additionalBlocksList = NULL;
-						additionalBlocksListSize = 0;
-					}
-				}
-				else
-					block = block->next;
-			//Add additional lists
-			*abatch = *pbatch;
-			*pbatch = additionalBatchesList;
-			pblock = ablock;
-			freeList = additionalBlocksList;
-			freeListSize = additionalBlocksListSize;
-
-			//Return back all left not-for-release blocks to the central cache as quickly as possible (as other threads may want to allocate a new memory)
-#define GIVE_LISTS_BACK_TO_CC \
-			SPINLOCK_ACQUIRE(&cc->lock);\
-			*pbatch = cc->firstBatch;\
-			cc->firstBatch = firstBatch;\
-			*pblock = cc->freeList;\
-			cc->freeList = freeList;\
-			cc->freeListSize += freeListSize;\
-			SPINLOCK_RELEASE(&cc->lock);\
-			if (bufferSize > sizeof(buffer)) VMFREE(inChunkFreeBlocks, bufferSize);//this better to do before 3. as kernel is likely optimized for release of just allocated range
-			GIVE_LISTS_BACK_TO_CC
-
-			if (padsz)
-			{
-				SPINLOCK_ACQUIRE(&pad.lock);
-				if (pad.size < padsz)
-				{
-					Chunk *first = firstFreeChunk, **c;
-					do//put off free chunks up to a specified pad size
-					{
-						c = (Chunk**)firstFreeChunk;
-						firstFreeChunk = *c;
-						pad.size += CHUNK_SIZE;
-					} while (pad.size < padsz && firstFreeChunk);
-					*c = (Chunk*)pad.freeChunk;
-					pad.freeChunk = first;
-				}
-				SPINLOCK_RELEASE(&pad.lock);
-			}
-
-			//3. Return memory to the system
-			while (firstFreeChunk)
-			{
-				Chunk *nextFreeChunk = *(Chunk**)firstFreeChunk;
-				VMFREE(firstFreeChunk, CHUNK_SIZE);
-				firstFreeChunk = nextFreeChunk;
-			}
-		}
-		else//nothing to release - just return batches back to the central cache
-		{
-			GIVE_LISTS_BACK_TO_CC
-#undef GIVE_LISTS_BACK_TO_CC
-		}}}
-	}
-}
-
-#if defined(__cplusplus) && !defined(LTALLOC_DISABLE_OPERATOR_NEW_OVERRIDE)
-void *operator new  (size_t size) throw(std::bad_alloc)          {return ltmalloc<true> (size);}
-void *operator new  (size_t size, const std::nothrow_t&) throw() {return ltmalloc<false>(size);}
-void *operator new[](size_t size) throw(std::bad_alloc)          {return ltmalloc<true> (size);}
-void *operator new[](size_t size, const std::nothrow_t&) throw() {return ltmalloc<false>(size);}
-
-void operator delete  (void* p)                        throw() {ltfree(p);}
-void operator delete  (void* p, const std::nothrow_t&) throw() {ltfree(p);}
-void operator delete[](void* p)                        throw() {ltfree(p);}
-void operator delete[](void* p, const std::nothrow_t&) throw() {ltfree(p);}
-#endif
-
-/* @r-lyeh's { */
-#include <string.h>
-void *ltcalloc(size_t elems, size_t size) {
-	size *= elems;
-	return memset( ltmalloc( size ), 0, size );
-}
-void *ltmemalign( size_t align, size_t size ) {
-	return --align, ltmalloc( (size+align)&~align );
-}
-void *ltrealloc( void *ptr, size_t sz ) {
-	if( !ptr ) return ltmalloc( sz );
-	if( !sz  ) return ltfree( ptr ), (void *)0;
-	size_t osz = ltmsize( ptr );
-	if( sz <= osz ) {
-		return ptr;
-	}
-	void *nptr = memcpy( ltmalloc(sz), ptr, osz );
-	ltfree( ptr );
-
-#ifdef LTALLOC_AUTO_GC_INTERVAL
-	/* this is kind of compromise; the following timer is to guarantee
-	that memory gets wiped out at least every given seconds between consecutive 
-	ltrealloc() calls (I am assuming frequency usage for ltrealloc() is smaller
-	than ltmalloc() or ltfree() too) - @r-lyeh */
-			clock_t now = clock();
-	static	clock_t then = now;
-	if( ( double(now - then) / CLOCKS_PER_SEC ) > LTALLOC_AUTO_GC_INTERVAL ) {
-		ltsqueeze(0);
-	}
-	then = now;
-#endif
-
-	return nptr;
-}
-/* } */

experimental/ltalloc.h

@@ -1,14 +0,0 @@
-#include <stdlib.h>  /*a more portable size_t definition than stddef.h itself*/
-#ifdef __cplusplus
-extern "C" {
-#endif
-void*  ltmalloc(size_t);
-void   ltfree(void*);
-void*  ltrealloc( void *, size_t );
-void*  ltcalloc( size_t, size_t );
-void*  ltmemalign( size_t, size_t );
-void   ltsqueeze(size_t pad); /*return memory to system (see README.md)*/
-size_t ltmsize(void*);
-#ifdef __cplusplus
-}
-#endif

experimental/ltalloc.hpp

@@ -1,59 +0,0 @@
-// based on code by Jerry Coffin (most likely Public Domain)
-// - rlyeh
-
-#pragma once
-
-#include <stdlib.h>
-#include <new>
-#include <limits>
-
-#include "ltalloc.h"
-
-namespace lt {
-template <class T>
-struct allocator {
-    typedef size_t size_type;
-    typedef ptrdiff_t difference_type;
-    typedef T* pointer;
-    typedef const T* const_pointer;
-    typedef T& reference;
-    typedef const T& const_reference;
-    typedef T value_type;
-
-    template <class U> struct rebind { typedef allocator<U> other; };
-    allocator() throw() {}
-    allocator(const allocator&) throw() {}
-
-    template <class U> allocator(const allocator<U>&) throw(){}
-
-    ~allocator() throw() {}
-
-    pointer address(reference x) const { return &x; }
-    const_pointer address(const_reference x) const { return &x; }
-
-    pointer allocate(size_type s, void const * = 0) {
-        if (0 == s)
-            return NULL;
-        pointer temp = (pointer)ltmalloc(s * sizeof(T));
-        if (temp == NULL)
-            throw std::bad_alloc();
-        return temp;
-    }
-
-    void deallocate(pointer p, size_type) {
-        ltfree(p);
-    }
-
-    size_type max_size() const throw() {
-        return std::numeric_limits<size_t>::max() / sizeof(T);
-    }
-
-    void construct(pointer p, const T& val) {
-        new((void *)p) T(val);
-    }
-
-    void destroy(pointer p) {
-        p->~T();
-    }
-};
-}

experimental/premake5.lua

@@ -8,6 +8,16 @@ newoption {
    description = "Build with ZStandard compression."
 }
 
+newoption {
+   trigger     = "clang",
+   description = "Use clang compiler."
+}
+
+newoption {
+   trigger     = "asan",
+   description = "Enable AddressSanitizer(gcc or clang only)."
+}
+
 solution "objview"
 	-- location ( "build" )
 	configurations { "Release", "Debug" }
@@ -17,17 +27,26 @@ solution "objview"
 
 	kind "ConsoleApp"
 	language "C++"
-	files { "viewer.cc", "trackball.cc", "ltalloc.cc" }
+	files { "viewer.cc", "trackball.cc" }
 	includedirs { "./" }
 	includedirs { "../../" }
 
-	buildoptions { "-std=c++11" }
+	flags { "c++11" }
+
+        if _OPTIONS['clang'] then
+           toolset "clang"
+        end
 
 	if _OPTIONS['with-zlib'] then
 		defines { 'ENABLE_ZLIB' }
 		links { 'z' }
 	end	
 
+	if _OPTIONS['asan'] then
+		buildoptions { '-fsanitize=address' }
+		linkoptions { '-fsanitize=address' }
+	end	
+
 	if _OPTIONS['with-zstd'] then
 		print("with-zstd")
 		defines { 'ENABLE_ZSTD' }
@@ -48,14 +67,15 @@ solution "objview"
 
 	configuration { "windows" }
 		-- Path to GLFW3
-		includedirs { '../../../../local/glfw-3.1.2.bin.WIN64/include' }
+		includedirs { '../../../local/glfw-3.2.bin.WIN64/include' }
-		libdirs { '../../../../local/glfw-3.1.2.bin.WIN64/lib-vc2013' }
+		libdirs { '../../../local/glfw-3.2.bin.WIN64/lib-vc2015' }
 		-- Path to GLEW
-		includedirs { '../../../../local/glew-1.13.0/include' }
+		includedirs { '../../../local/glew-1.13.0/include' }
-		libdirs { '../../../../local/glew-1.13.0/lib/Release/x64' }
+		libdirs { '../../../local/glew-1.13.0/lib/Release/x64' }
 
 		links { "glfw3", "glew32", "gdi32", "winmm", "user32", "glu32","opengl32", "kernel32" }
 		defines { "_CRT_SECURE_NO_WARNINGS" }
+		defines { "NOMINMAX" }
 
 	configuration { "macosx" }
 		includedirs { "/usr/local/include" }

experimental/tinyobj_loader_opt.h

@@ -1,12 +1,12 @@
 //
 // Optimized wavefront .obj loader.
-// Requires ltalloc and C++11
+// Requires lfpAlloc and C++11
 //
 
 /*
 The MIT License (MIT)
 
-Copyright (c) 2012-2016 Syoyo Fujita and many contributors.
+Copyright (c) 2012-2017 Syoyo Fujita and many contributors.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -29,7 +29,7 @@ THE SOFTWARE.
 #ifndef TINOBJ_LOADER_OPT_H_
 #define TINOBJ_LOADER_OPT_H_
 
-#ifdef _WIN64
+#ifdef _WIN32
 #define atoll(S) _atoi64(S)
 #include <windows.h>
 #else
@@ -38,7 +38,6 @@ THE SOFTWARE.
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include <unistd.h>
 #endif
 
 #include <cassert>
@@ -55,7 +54,7 @@ THE SOFTWARE.
 #include <chrono>  // C++11
 #include <thread>  // C++11
 
-#include "ltalloc.hpp"
+#include "lfpAlloc/Allocator.hpp"
 
 namespace tinyobj_opt {
 
@@ -327,12 +326,12 @@ struct index_t {
 };
 
 typedef struct {
-  std::vector<float, lt::allocator<float> > vertices;
+  std::vector<float, lfpAlloc::lfpAllocator<float> > vertices;
-  std::vector<float, lt::allocator<float> > normals;
+  std::vector<float, lfpAlloc::lfpAllocator<float> > normals;
-  std::vector<float, lt::allocator<float> > texcoords;
+  std::vector<float, lfpAlloc::lfpAllocator<float> > texcoords;
-  std::vector<index_t, lt::allocator<index_t> > indices;
+  std::vector<index_t, lfpAlloc::lfpAllocator<index_t> > indices;
-  std::vector<int, lt::allocator<int> > face_num_verts;
+  std::vector<int, lfpAlloc::lfpAllocator<int> > face_num_verts;
-  std::vector<int, lt::allocator<int> > material_ids;
+  std::vector<int, lfpAlloc::lfpAllocator<int> > material_ids;
 } attrib_t;
 
 typedef StackVector<char, 256> ShortString;
@@ -999,9 +998,9 @@ typedef struct {
   float tx, ty;
 
   // for f
-  std::vector<index_t, lt::allocator<index_t> > f;
+  std::vector<index_t, lfpAlloc::lfpAllocator<index_t> > f;
   // std::vector<index_t> f;
-  std::vector<int, lt::allocator<int> > f_num_verts;
+  std::vector<int, lfpAlloc::lfpAllocator<int> > f_num_verts;
 
   const char *group_name;
   unsigned int group_name_len;
@@ -1047,8 +1046,14 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
               std::vector<material_t> *materials, const char *buf, size_t len,
               const LoadOption &option);
 
+} // namespace tinyobj_opt
+
+#endif  // TINOBJ_LOADER_OPT_H_
+
 #ifdef TINYOBJ_LOADER_OPT_IMPLEMENTATION
 
+namespace tinyobj_opt {
+
 static bool parseLine(Command *command, const char *p, size_t p_len,
                       bool triangulate = true) {
   // @todo { operate directly on pointer `p'. to do that, add range check for
@@ -1263,7 +1268,7 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
                          ? std::thread::hardware_concurrency()
                          : option.req_num_threads;
   num_threads =
-      std::max(1, std::min(static_cast<int>(num_threads), kMaxThreads));
+      (std::max)(1, (std::min)(static_cast<int>(num_threads), kMaxThreads));
 
   if (option.verbose) {
     std::cout << "# of threads = " << num_threads << std::endl;
@@ -1271,7 +1276,8 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
 
   auto t1 = std::chrono::high_resolution_clock::now();
 
-  std::vector<LineInfo, lt::allocator<LineInfo> > line_infos[kMaxThreads];
+  std::vector<LineInfo, lfpAlloc::lfpAllocator<LineInfo> >
+      line_infos[kMaxThreads];
   for (size_t t = 0; t < static_cast<size_t>(num_threads); t++) {
     // Pre allocate enough memory. len / 128 / num_threads is just a heuristic
     // value.
@@ -1295,7 +1301,7 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
     for (size_t t = 0; t < static_cast<size_t>(num_threads); t++) {
       workers->push_back(std::thread([&, t]() {
         auto start_idx = (t + 0) * chunk_size;
-        auto end_idx = std::min((t + 1) * chunk_size, len - 1);
+        auto end_idx = (std::min)((t + 1) * chunk_size, len - 1);
         if (t == static_cast<size_t>((num_threads - 1))) {
           end_idx = len - 1;
         }
@@ -1325,7 +1331,7 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
 
         // Find extra line which spand across chunk boundary.
         if ((t < num_threads) && (buf[end_idx - 1] != '\n')) {
-          auto extra_span_idx = std::min(end_idx - 1 + chunk_size, len - 1);
+          auto extra_span_idx = (std::min)(end_idx - 1 + chunk_size, len);
           for (size_t i = end_idx; i < extra_span_idx; i++) {
             if (is_line_ending(buf, i, extra_span_idx)) {
               LineInfo info;
@@ -1558,8 +1564,9 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
                   index_t(vertex_index, texcoord_index, normal_index);
             }
             for (size_t k = 0; k < commands[t][i].f_num_verts.size(); k++) {
-							attrib->material_ids[face_count + k] = material_id;
+              attrib->material_ids[face_count + k] = material_id;
-							attrib->face_num_verts[face_count + k] = commands[t][i].f_num_verts[k];
+              attrib->face_num_verts[face_count + k] =
+                  commands[t][i].f_num_verts[k];
             }
 
             f_count += commands[t][i].f.size();
@@ -1671,8 +1678,7 @@ bool parseObj(attrib_t *attrib, std::vector<shape_t> *shapes,
 
   return true;
 }
-#endif  // TINYOBJ_LOADER_OPT_IMPLEMENTATION
 
 }  // namespace tinyobj_opt
 
-#endif  // TINOBJ_LOADER_OPT_H_
+#endif  // TINYOBJ_LOADER_OPT_IMPLEMENTATION

experimental/viewer.cc

@@ -90,23 +90,40 @@ void CalcNormal(float N[3], float v0[3], float v1[3], float v2[3]) {
 const char *mmap_file(size_t *len, const char* filename)
 {
   (*len) = 0;
-#ifdef _WIN64
+#ifdef _WIN32
   HANDLE file = CreateFileA(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL);
-    assert(file != INVALID_HANDLE_VALUE);
+  assert(file != INVALID_HANDLE_VALUE);
 
-    HANDLE fileMapping = CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL);
+  HANDLE fileMapping = CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL);
-    assert(fileMapping != INVALID_HANDLE_VALUE);
+  assert(fileMapping != INVALID_HANDLE_VALUE);
  
-    LPVOID fileMapView = MapViewOfFile(fileMapping, FILE_MAP_READ, 0, 0, 0);
+  LPVOID fileMapView = MapViewOfFile(fileMapping, FILE_MAP_READ, 0, 0, 0);
-    auto fileMapViewChar = (const char*)fileMapView;
+  auto fileMapViewChar = (const char*)fileMapView;
-    assert(fileMapView != NULL);
+  assert(fileMapView != NULL);
+
+  LARGE_INTEGER fileSize;
+  fileSize.QuadPart = 0;
+  GetFileSizeEx(file, &fileSize);
+
+  (*len) = static_cast<size_t>(fileSize.QuadPart);
+  return fileMapViewChar;
+
 #else
 
-  FILE* f = fopen(filename, "r" );
+  FILE* f = fopen(filename, "rb" );
+  if (!f) {
+    fprintf(stderr, "Failed to open file : %s\n", filename);
+    return nullptr;
+  }
   fseek(f, 0, SEEK_END);
   long fileSize = ftell(f);
   fclose(f);
 
+  if (fileSize < 16) {
+    fprintf(stderr, "Empty or invalid .obj : %s\n", filename);
+    return nullptr;
+  }
+
   struct stat sb;
   char *p;
   int fd;
@@ -114,29 +131,29 @@ const char *mmap_file(size_t *len, const char* filename)
   fd = open (filename, O_RDONLY);
   if (fd == -1) {
     perror ("open");
-    return NULL;
+    return nullptr;
   }
 
   if (fstat (fd, &sb) == -1) {
     perror ("fstat");
-    return NULL;
+    return nullptr;
   }
 
   if (!S_ISREG (sb.st_mode)) {
     fprintf (stderr, "%s is not a file\n", "lineitem.tbl");
-    return NULL;
+    return nullptr;
   }
 
   p = (char*)mmap (0, fileSize, PROT_READ, MAP_SHARED, fd, 0);
 
   if (p == MAP_FAILED) {
     perror ("mmap");
-    return NULL;
+    return nullptr;
   }
 
   if (close (fd) == -1) {
     perror ("close");
-    return NULL;
+    return nullptr;
   }
 
   (*len) = fileSize;
@@ -290,6 +307,7 @@ const char* get_file_data(size_t *len, const char* filename)
   } else {
     
     data = mmap_file(&data_len, filename);
+
   }
 
   (*len) = data_len;
@@ -324,6 +342,10 @@ bool LoadObjAndConvert(float bmin[3], float bmax[3], const char* filename, int n
   option.verbose = verbose;
   bool ret = parseObj(&attrib, &shapes, &materials, data, data_len, option);
 
+  if (!ret) {
+	  std::cerr << "Failed to parse .obj" << std::endl;
+	  return false;
+  }
   bmin[0] = bmin[1] = bmin[2] = std::numeric_limits<float>::max();
   bmax[0] = bmax[1] = bmax[2] = -std::numeric_limits<float>::max();
 
@@ -630,6 +652,12 @@ int main(int argc, char **argv)
       exit(-1);
       return false;
     }
+
+    if (data_len < 4) {
+      printf("Empty file\n");
+      exit(-1);
+      return false;
+    }
     printf("filesize: %d\n", (int)data_len);
     tinyobj_opt::LoadOption option;
     option.req_num_threads = num_threads;

loader_example.cc

@@ -15,8 +15,8 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-#include <mmsystem.h>
 #include <windows.h>
+#include <mmsystem.h>
 #ifdef __cplusplus
 }
 #endif
@@ -233,16 +233,17 @@ static void PrintInfo(const tinyobj::attrib_t& attrib,
     printf("  material.map_Ns = %s\n",
            materials[i].specular_highlight_texname.c_str());
     printf("  material.map_bump = %s\n", materials[i].bump_texname.c_str());
+    printf("    bump_multiplier = %f\n", static_cast<const double>(materials[i].bump_texopt.bump_multiplier));
     printf("  material.map_d = %s\n", materials[i].alpha_texname.c_str());
     printf("  material.disp = %s\n", materials[i].displacement_texname.c_str());
     printf("  <<PBR>>\n");
-    printf("  material.Pr     = %f\n", materials[i].roughness);
+    printf("  material.Pr     = %f\n", static_cast<const double>(materials[i].roughness));
-    printf("  material.Pm     = %f\n", materials[i].metallic);
+    printf("  material.Pm     = %f\n", static_cast<const double>(materials[i].metallic));
-    printf("  material.Ps     = %f\n", materials[i].sheen);
+    printf("  material.Ps     = %f\n", static_cast<const double>(materials[i].sheen));
-    printf("  material.Pc     = %f\n", materials[i].clearcoat_thickness);
+    printf("  material.Pc     = %f\n", static_cast<const double>(materials[i].clearcoat_thickness));
-    printf("  material.Pcr    = %f\n", materials[i].clearcoat_thickness);
+    printf("  material.Pcr    = %f\n", static_cast<const double>(materials[i].clearcoat_thickness));
-    printf("  material.aniso  = %f\n", materials[i].anisotropy);
+    printf("  material.aniso  = %f\n", static_cast<const double>(materials[i].anisotropy));
-    printf("  material.anisor = %f\n", materials[i].anisotropy_rotation);
+    printf("  material.anisor = %f\n", static_cast<const double>(materials[i].anisotropy_rotation));
     printf("  material.map_Ke = %s\n", materials[i].emissive_texname.c_str());
     printf("  material.map_Pr = %s\n", materials[i].roughness_texname.c_str());
     printf("  material.map_Pm = %s\n", materials[i].metallic_texname.c_str());
@@ -363,8 +364,14 @@ static bool TestStreamLoadObj() {
                             std::map<std::string, int>* matMap,
                             std::string* err) {
       (void)matId;
-      (void)err;
+      std::string warning;
-      LoadMtl(matMap, materials, &m_matSStream);
+      LoadMtl(matMap, materials, &m_matSStream, &warning);
+
+      if (!warning.empty()) {
+        if (err) {
+          (*err) += warning;
+        }
+      }
       return true;
     }
 

models/issue-138.mtl

@@ -0,0 +1,23 @@
+newmtl test1
+  Ns 10.0000
+  Ni 1.5000
+  d 1.0000
+  Tr 0.0000
+  Tf 1.0000 1.0000 1.0000 
+  illum 2
+  Ka 0.0000 0.0000 0.0000
+  Kd 0.5 0.2 0.2
+  Ks 0.0000 0.0000 0.0000
+  Ke 0.0000 0.0000 0.0000
+
+ newmtl test2
+  Ns 10.0000
+  Ni 1.5000
+  d 1.0000
+  Tr 0.0000
+  Tf 1.0000 1.0000 1.0000 
+  illum 2
+  Ka 0.0000 0.0000 0.0000
+  Kd 0.2 0.5 0.2
+  Ks 0.0000 0.0000 0.0000
+  Ke 0.0000 0.0000 0.0000

models/issue-138.obj

@@ -0,0 +1,51 @@
+
+# cube.obj
+#
+
+mtllib issue-138.mtl
+
+v -0.500000 -0.500000 0.500000
+v 0.500000 -0.500000 0.500000
+v -0.500000 0.500000 0.500000
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+
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+
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+vn 0.000000 -1.000000 0.000000
+vn 1.000000 0.000000 0.000000
+vn -1.000000 0.000000 0.000000
+
+usemtl test1
+g test1
+s 1
+f 1/1/1 2/2/1 3/3/1
+f 3/3/1 2/2/1 4/4/1
+
+usemtl test2
+g test2
+
+s 2
+f 3/1/2 4/2/2 5/3/2
+f 5/3/2 4/2/2 6/4/2
+s 3
+f 5/4/3 6/3/3 7/2/3
+f 7/2/3 6/3/3 8/1/3
+s 4
+f 7/1/4 8/2/4 1/3/4
+f 1/3/4 8/2/4 2/4/4
+s 5
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+f 4/3/5 8/2/5 6/4/5
+s 6
+f 7/1/6 1/2/6 5/3/6
+f 5/3/6 1/2/6 3/4/6

models/map-bump.mtl

@@ -0,0 +1,10 @@
+newmtl Material.001
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+map_Bump bump.jpg
+
+newmtl Material.003
+Ka 0 0 0
+Kd 1 1 1
+Ks 0 0 0

models/map-bump.obj

@@ -0,0 +1,817 @@
+# https://github.com/syoyo/tinyobjloader/issues/68
+# Blender v2.73 (sub 0) OBJ File: 'enemy.blend'
+# www.blender.org
+mtllib map-bump.mtl
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models/mtllib-multiple-files-issue-112.mtl

@@ -0,0 +1,6 @@
+newmtl default
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+map_Kd tmp.png 
+

models/mtllib-multiple-files-issue-112.obj

@@ -0,0 +1,7 @@
+mtllib invalid-file-aaa.mtl invalid-file-bbb.mtl mtllib-multiple-files-issue-112.mtl
+o Test
+v 1.864151 -1.219172 -5.532511
+v 0.575869 -0.666304 5.896140
+v 0.940448 1.000000 -1.971128
+usemtl default
+f 1 2 3

models/refl.mtl

@@ -0,0 +1,25 @@
+newmtl white
+Ka 0 0 0
+Kd 1 1 1
+Ks 0 0 0
+refl reflection.tga
+
+newmtl red
+Ka 0 0 0
+Kd 1 0 0
+Ks 0 0 0
+
+newmtl green
+Ka 0 0 0
+Kd 0 1 0
+Ks 0 0 0
+
+newmtl blue
+Ka 0 0 0
+Kd 0 0 1
+Ks 0 0 0
+
+newmtl light
+Ka 20 20 20
+Kd 1 1 1
+Ks 0 0 0

models/refl.obj

@@ -0,0 +1,32 @@
+# Test for `refl` material parameter
+mtllib refl.mtl
+
+v 0.000000 2.000000 2.000000
+v 0.000000 0.000000 2.000000
+v 2.000000 0.000000 2.000000
+v 2.000000 2.000000 2.000000
+v 0.000000 2.000000 0.000000
+v 0.000000 0.000000 0.000000
+v 2.000000 0.000000 0.000000
+v 2.000000 2.000000 0.000000
+# 8 vertices
+
+g front cube
+usemtl white
+f 1 2 3 4
+g back cube
+# expects white material
+f 8 7 6 5
+g right cube
+usemtl red
+f 4 3 7 8
+g top cube
+usemtl white
+f 5 1 4 8
+g left cube
+usemtl green
+f 5 6 2 1
+g bottom cube
+usemtl white
+f 2 6 7 3
+# 6 elements

models/texture-options-issue-85.mtl

@@ -0,0 +1,36 @@
+newmtl default
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+Kt 0.1 0.2 0.3
+map_Ka -clamp on ambient.jpg
+map_Kd -o 0.1 diffuse.jpg
+map_Ks -s 0.1 0.2 specular.jpg
+map_Ns -t 0.1 0.2 0.3 specular_highlight.jpg
+map_bump -bm 3 bumpmap.jpg
+
+newmtl bm2
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+Kt 0.1 0.2 0.3
+# blendu
+map_Kd -blendu on diffuse.jpg
+map_Ks -blendv off specular.jpg
+map_Ns -mm 0.1 0.3 specular_highlight.jpg
+# -bm after filename
+map_bump -imfchan r bumpmap2.jpg -bm 1.5
+
+newmtl bm3
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+Kt 0.1 0.2 0.3
+# type
+map_Kd -type sphere diffuse.jpg
+map_Ks -type cube_top specular.jpg
+map_Ns -type cube_bottom specular_highlight.jpg
+map_Ka -type cube_left ambient.jpg
+map_d -type cube_right alpha.jpg
+map_bump -type cube_front bump.jpg
+disp -type cube_back displacement.jpg

models/texture-options-issue-85.obj

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+mtllib texture-options-issue-85.mtl
+o Test
+v 1.864151 -1.219172 -5.532511
+v 0.575869 -0.666304 5.896140
+v 0.940448 1.000000 -1.971128
+usemtl default
+f 1 2 3

models/tr-and-d-issue-43.mtl

@@ -0,0 +1,13 @@
+newmtl Material.001
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+d 0.75
+Tr 0.5
+
+newmtl Material.002
+Ka 0 0 0
+Kd 0 0 0
+Ks 0 0 0
+Tr 0.5
+d 0.75

models/tr-and-d-issue-43.obj

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+# https://github.com/syoyo/tinyobjloader/issues/68
+# Blender v2.73 (sub 0) OBJ File: 'enemy.blend'
+# www.blender.org
+mtllib tr-and-d-issue-43.mtl
+o Cube
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+v 0.575869 -0.666304 5.896140
+v 0.940448 1.000000 -1.971128
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+usemtl Material.002
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python/TODO.md

@@ -1,3 +1,2 @@
 * PBR material
 * Define index_t struct
-* Python 2.7 binding

python/main.cpp

@@ -1,4 +1,4 @@
-// python3 module for tinyobjloader
+// python2/3 module for tinyobjloader
 //
 // usage:
 // import tinyobjloader as tol
@@ -29,7 +29,7 @@ PyObject* pyTupleFromfloat3(float array[3]) {
 extern "C" {
 
 static PyObject* pyLoadObj(PyObject* self, PyObject* args) {
-  PyObject *rtndict, *pyshapes, *pymaterials, *attribobj, *current, *meshobj;
+  PyObject *rtndict, *pyshapes, *pymaterials, *pymaterial_indices, *attribobj, *current, *meshobj;
 
   char const* current_name;
   char const* filename;
@@ -48,6 +48,7 @@ static PyObject* pyLoadObj(PyObject* self, PyObject* args) {
 
   pyshapes = PyDict_New();
   pymaterials = PyDict_New();
+  pymaterial_indices = PyDict_New();
   rtndict = PyDict_New();
 
   attribobj = PyDict_New();
@@ -123,6 +124,7 @@ static PyObject* pyLoadObj(PyObject* self, PyObject* args) {
     PyDict_SetItemString(pyshapes, (*shape).name.c_str(), meshobj);
   }
 
+  long material_index = 0;
   for (std::vector<tinyobj::material_t>::iterator mat = materials.begin();
        mat != materials.end(); mat++) {
     PyObject* matobj = PyDict_New();
@@ -168,10 +170,13 @@ static PyObject* pyLoadObj(PyObject* self, PyObject* args) {
     PyDict_SetItemString(matobj, "unknown_parameter", unknown_parameter);
 
     PyDict_SetItemString(pymaterials, (*mat).name.c_str(), matobj);
+    PyDict_SetItemString(pymaterial_indices, PyLong_FromLong(material_index++), (*mat).name.c_str());
   }
 
   PyDict_SetItemString(rtndict, "shapes", pyshapes);
   PyDict_SetItemString(rtndict, "materials", pymaterials);
+  PyDict_SetItemString(rtndict, "material_indices", pymaterial_indices);
+  PyDict_SetItemString(rtndict, "attribs", attribobj);
 
   return rtndict;
 }
@@ -182,10 +187,21 @@ static PyMethodDef mMethods[] = {
 
 };
 
+#if PY_MAJOR_VERSION >= 3
+
 static struct PyModuleDef moduledef = {PyModuleDef_HEAD_INIT, "tinyobjloader",
                                        NULL, -1, mMethods};
 
 PyMODINIT_FUNC PyInit_tinyobjloader(void) {
   return PyModule_Create(&moduledef);
 }
+
+#else
+
+PyMODINIT_FUNC inittinyobjloader(void) {
+  Py_InitModule3("tinyobjloader", mMethods, NULL);
+}
+
+#endif  // PY_MAJOR_VERSION >= 3
+
 }

tests/tester.cc

@@ -145,6 +145,7 @@ static void PrintInfo(const tinyobj::attrib_t &attrib, const std::vector<tinyobj
     printf("  material.map_bump = %s\n", materials[i].bump_texname.c_str());
     printf("  material.map_d = %s\n", materials[i].alpha_texname.c_str());
     printf("  material.disp = %s\n", materials[i].displacement_texname.c_str());
+    printf("  material.refl = %s\n", materials[i].reflection_texname.c_str());
     std::map<std::string, std::string>::const_iterator it(materials[i].unknown_parameter.begin());
     std::map<std::string, std::string>::const_iterator itEnd(materials[i].unknown_parameter.end());
 
@@ -307,7 +308,8 @@ std::string matStream(
             {
                 (void)matId;
                 (void)err;
-                LoadMtl(matMap, materials, &m_matSStream);
+                std::string warning;
+                LoadMtl(matMap, materials, &m_matSStream, &warning);
                 return true;
             }
 
@@ -488,6 +490,141 @@ TEST_CASE("usemtl_at_last_line", "[Issue104]") {
   REQUIRE(1 == shapes.size());
 }
 
+TEST_CASE("texture_opts", "[Issue85]") {
+  tinyobj::attrib_t attrib;
+  std::vector<tinyobj::shape_t> shapes;
+  std::vector<tinyobj::material_t> materials;
+
+  std::string err;
+  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "../models/texture-options-issue-85.obj", gMtlBasePath);
+
+  if (!err.empty()) {
+    std::cerr << err << std::endl;
+  }
+  REQUIRE(true == ret);
+  REQUIRE(1 == shapes.size());
+  REQUIRE(3 == materials.size());
+  REQUIRE(0 == materials[0].name.compare("default"));
+  REQUIRE(0 == materials[1].name.compare("bm2"));
+  REQUIRE(0 == materials[2].name.compare("bm3"));
+  REQUIRE(true == materials[0].ambient_texopt.clamp);
+  REQUIRE(0.1 == Approx(materials[0].diffuse_texopt.origin_offset[0]));
+  REQUIRE(0.0 == Approx(materials[0].diffuse_texopt.origin_offset[1]));
+  REQUIRE(0.0 == Approx(materials[0].diffuse_texopt.origin_offset[2]));
+  REQUIRE(0.1 == Approx(materials[0].specular_texopt.scale[0]));
+  REQUIRE(0.2 == Approx(materials[0].specular_texopt.scale[1]));
+  REQUIRE(1.0 == Approx(materials[0].specular_texopt.scale[2]));
+  REQUIRE(0.1 == Approx(materials[0].specular_highlight_texopt.turbulence[0]));
+  REQUIRE(0.2 == Approx(materials[0].specular_highlight_texopt.turbulence[1]));
+  REQUIRE(0.3 == Approx(materials[0].specular_highlight_texopt.turbulence[2]));
+  REQUIRE(3.0 == Approx(materials[0].bump_texopt.bump_multiplier));
+
+  REQUIRE(0.1 == Approx(materials[1].specular_highlight_texopt.brightness));
+  REQUIRE(0.3 == Approx(materials[1].specular_highlight_texopt.contrast));
+  REQUIRE('r' == materials[1].bump_texopt.imfchan);
+
+  REQUIRE(tinyobj::TEXTURE_TYPE_SPHERE == materials[2].diffuse_texopt.type);
+  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_TOP == materials[2].specular_texopt.type);
+  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_BOTTOM == materials[2].specular_highlight_texopt.type);
+  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_LEFT == materials[2].ambient_texopt.type);
+  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_RIGHT == materials[2].alpha_texopt.type);
+  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_FRONT == materials[2].bump_texopt.type);
+  REQUIRE(tinyobj::TEXTURE_TYPE_CUBE_BACK == materials[2].displacement_texopt.type);
+}
+
+TEST_CASE("mtllib_multiple_filenames", "[Issue112]") {
+  tinyobj::attrib_t attrib;
+  std::vector<tinyobj::shape_t> shapes;
+  std::vector<tinyobj::material_t> materials;
+
+  std::string err;
+  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "../models/mtllib-multiple-files-issue-112.obj", gMtlBasePath);
+
+  if (!err.empty()) {
+    std::cerr << err << std::endl;
+  }
+  REQUIRE(true == ret);
+  REQUIRE(1 == materials.size());
+}
+
+TEST_CASE("tr_and_d", "[Issue43]") {
+  tinyobj::attrib_t attrib;
+  std::vector<tinyobj::shape_t> shapes;
+  std::vector<tinyobj::material_t> materials;
+
+  std::string err;
+  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "../models/tr-and-d-issue-43.obj", gMtlBasePath);
+
+  if (!err.empty()) {
+    std::cerr << err << std::endl;
+  }
+  REQUIRE(true == ret);
+  REQUIRE(2 == materials.size());
+
+  REQUIRE(0.75 == Approx(materials[0].dissolve));
+  REQUIRE(0.75 == Approx(materials[1].dissolve));
+}
+
+TEST_CASE("refl", "[refl]") {
+  tinyobj::attrib_t attrib;
+  std::vector<tinyobj::shape_t> shapes;
+  std::vector<tinyobj::material_t> materials;
+
+  std::string err;
+  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "../models/refl.obj", gMtlBasePath);
+
+  if (!err.empty()) {
+    std::cerr << err << std::endl;
+  }
+
+  PrintInfo(attrib, shapes, materials);
+
+  REQUIRE(true == ret);
+  REQUIRE(5 == materials.size());
+
+  REQUIRE(materials[0].reflection_texname.compare("reflection.tga") == 0);
+}
+
+TEST_CASE("map_Bump", "[bump]") {
+  tinyobj::attrib_t attrib;
+  std::vector<tinyobj::shape_t> shapes;
+  std::vector<tinyobj::material_t> materials;
+
+  std::string err;
+  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "../models/map-bump.obj", gMtlBasePath);
+
+  if (!err.empty()) {
+    std::cerr << err << std::endl;
+  }
+
+  PrintInfo(attrib, shapes, materials);
+
+  REQUIRE(true == ret);
+  REQUIRE(2 == materials.size());
+
+  REQUIRE(materials[0].bump_texname.compare("bump.jpg") == 0);
+}
+
+TEST_CASE("g_ignored", "[Issue138]") {
+  tinyobj::attrib_t attrib;
+  std::vector<tinyobj::shape_t> shapes;
+  std::vector<tinyobj::material_t> materials;
+
+  std::string err;
+  bool ret = tinyobj::LoadObj(&attrib, &shapes, &materials, &err, "../models/issue-138.obj", gMtlBasePath);
+
+  if (!err.empty()) {
+    std::cerr << err << std::endl;
+  }
+
+  PrintInfo(attrib, shapes, materials);
+
+  REQUIRE(true == ret);
+  REQUIRE(2 == shapes.size());
+  REQUIRE(2 == materials.size());
+
+}
+
 #if 0
 int
 main(

tinyobjloader-config.cmake.in

@@ -0,0 +1,9 @@
+@PACKAGE_INIT@
+
+set(TINYOBJLOADER_VERSION "@TINYOBJLOADER_VERSION@")
+
+set_and_check(TINYOBJLOADER_INCLUDE_DIRS "@PACKAGE_TINYOBJLOADER_INCLUDE_DIR@")
+set_and_check(TINYOBJLOADER_LIBRARY_DIRS "@PACKAGE_TINYOBJLOADER_LIBRARY_DIR@")
+set(TINYOBJLOADER_LIBRARIES @LIBRARY_NAME@)
+
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake")

tinyobjloader.pc.in

@@ -0,0 +1,15 @@
+# Generated by CMake @CMAKE_VERSION@ for @PROJECT_NAME@. Any changes to this
+# file will be overwritten by the next CMake run. The input file was
+# tinyobjloader.pc.in.
+
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${prefix}/@TINYOBJLOADER_LIBRARY_DIR@
+includedir=${prefix}/@TINYOBJLOADER_INCLUDE_DIR@
+
+Name: @PROJECT_NAME@
+Description: Tiny but powerful single file wavefront obj loader
+URL: https://syoyo.github.io/tinyobjloader/
+Version: @TINYOBJLOADER_VERSION@
+Libs: -L${libdir} -l@LIBRARY_NAME@
+Cflags: -I${includedir}