Not compiling but lots of progress

CMakeLists.txt

@@ -8,13 +8,15 @@ set(BuildDir ./bin)
 set(BuildExecutable resource-monitor)
 set(Build ${BuildDir}/${BuildExecutable})
 
-set(Platform ./platform)
-set(LinuxDep ${Platform}/linux)
-set(WinDep ${Platform}/win32)
 set(SourceDir ./src)
+set(Platform ./platform)
+set(WinDep ${Platform}/win32)
+set(LinuxDep ${Platform}/linux)
 
 set(Include ./include)
 
+find_package(Threads REQUIRED)
+
 include_directories(${Build}/ ${Include})
 
 if (WIN32)
@@ -39,3 +41,5 @@ add_executable(${Build}
     ${SourceFiles}
     ${PlatformDepSource}
 )
+
+target_link_libraries(${Build} Threads::Threads)

Makefile

@@ -123,6 +123,60 @@ depend:
 	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/build
 .PHONY : ./bin/resource-monitor/fast
 
+platform/linux/monitoring/cpu.o: platform/linux/monitoring/cpu.cpp.o
+
+.PHONY : platform/linux/monitoring/cpu.o
+
+# target to build an object file
+platform/linux/monitoring/cpu.cpp.o:
+	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/platform/linux/monitoring/cpu.cpp.o
+.PHONY : platform/linux/monitoring/cpu.cpp.o
+
+platform/linux/monitoring/cpu.i: platform/linux/monitoring/cpu.cpp.i
+
+.PHONY : platform/linux/monitoring/cpu.i
+
+# target to preprocess a source file
+platform/linux/monitoring/cpu.cpp.i:
+	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/platform/linux/monitoring/cpu.cpp.i
+.PHONY : platform/linux/monitoring/cpu.cpp.i
+
+platform/linux/monitoring/cpu.s: platform/linux/monitoring/cpu.cpp.s
+
+.PHONY : platform/linux/monitoring/cpu.s
+
+# target to generate assembly for a file
+platform/linux/monitoring/cpu.cpp.s:
+	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/platform/linux/monitoring/cpu.cpp.s
+.PHONY : platform/linux/monitoring/cpu.cpp.s
+
+src/main.o: src/main.cpp.o
+
+.PHONY : src/main.o
+
+# target to build an object file
+src/main.cpp.o:
+	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/src/main.cpp.o
+.PHONY : src/main.cpp.o
+
+src/main.i: src/main.cpp.i
+
+.PHONY : src/main.i
+
+# target to preprocess a source file
+src/main.cpp.i:
+	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/src/main.cpp.i
+.PHONY : src/main.cpp.i
+
+src/main.s: src/main.cpp.s
+
+.PHONY : src/main.s
+
+# target to generate assembly for a file
+src/main.cpp.s:
+	$(MAKE) -f CMakeFiles/./bin/resource-monitor.dir/build.make CMakeFiles/./bin/resource-monitor.dir/src/main.cpp.s
+.PHONY : src/main.cpp.s
+
 # Help Target
 help:
 	@echo "The following are some of the valid targets for this Makefile:"
@@ -132,6 +186,12 @@ help:
 	@echo "... rebuild_cache"
 	@echo "... ./bin/resource-monitor"
 	@echo "... edit_cache"
+	@echo "... platform/linux/monitoring/cpu.o"
+	@echo "... platform/linux/monitoring/cpu.i"
+	@echo "... platform/linux/monitoring/cpu.s"
+	@echo "... src/main.o"
+	@echo "... src/main.i"
+	@echo "... src/main.s"
 .PHONY : help
 
 

include/cpu.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <atomic>
+#include <thread>
+
+class CPU {
+public:
+    CPU();
+    
+    std::atomic<int> CPU_PREVIOUS_IDLE;
+    std::atomic<int> CPU_PREVIOUS_TOTAL;
+    std::atomic<int> CPU_IDLE;
+    std::atomic<int> CPU_TOTAL;
+
+    std::atomic<int> UPDATE_INTERVAL; // ms
+
+    void START_CPU_POLLING();
+    static void CPU_POLL();
+    void END_CPU_POLLING();
+
+    double CPU_PERCENT();
+
+    virtual ~CPU();
+private:
+    std::thread* m_pollThread;
+    std::atomic<bool> m_isPolling;
+};
+
+static CPU* instance;
+static CPU* GetCPUInstance() {
+    if (instance == (void*)0) {
+        CPU cpu;
+        instance = &cpu;
+        return instance;
+    }
+    return instance;
+}
+

platform/linux/monitoring/cpu.cpp

@@ -0,0 +1,51 @@
+#include <cpu.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <iostream>
+
+CPU::CPU() {
+    this->UPDATE_INTERVAL = 1000;
+    this->m_isPolling = false;
+}
+
+void CPU::START_CPU_POLLING() {
+    if (this->m_isPolling) {
+        return;
+    }
+    std::thread t(&CPU::CPU_POLL);
+    this->m_pollThread = &t; 
+    this->m_isPolling = true;
+    std::cout << "Worker CPU thread started" << std::endl;
+}
+
+void CPU::CPU_POLL() {
+    CPU* cpu = GetCPUInstance();
+    while (cpu->m_isPolling) {
+        cpu->CPU_PREVIOUS_IDLE++;
+        cpu->CPU_PREVIOUS_TOTAL++;
+        cpu->CPU_IDLE++;
+        cpu->CPU_TOTAL++;
+        usleep(cpu->UPDATE_INTERVAL);
+    }
+}
+
+void CPU::END_CPU_POLLING() {
+    if (!this->m_isPolling) {
+        return;
+    }
+    this->m_isPolling = false;
+    usleep(this->UPDATE_INTERVAL + 5);
+    m_pollThread->join();
+    delete m_pollThread;
+}
+
+double CPU::CPU_PERCENT() {
+    return (double)this->CPU_TOTAL;
+}
+
+CPU::~CPU() {
+    CPU::m_pollThread->~thread();
+}

src/main.cpp

@@ -1,4 +1,12 @@
+#include <iostream>
+#include <cpu.h>
 
 int main(int argc, char** argv) {
+    CPU* cpu = GetCPUInstance();
 
+    cpu->START_CPU_POLLING();
+
+    while(1) {
+        std::cout << cpu->CPU_PERCENT() << std::endl;
+    }
 }