Finished memory usage API for linux systems

include/memstat.h

@@ -2,17 +2,24 @@
 
 #include <thread>
 #include <mutex>
+#include <cstring> // For memcpy 
+
+struct MemStat {
+    long double TOTAL_MB;
+    long double FREE_MB;
+    long double SHARED_MB;
+    long double BUFFER_MB;
+    short TOTAL_RUNNING_PROCS;
+};
 
 class Memory {
 public:
     Memory();
 
     std::mutex Memory_Mutex;
-    long double MEMORY_TOTAL_MB;
+    MemStat* memStat;
-    long double MEMORY_FREE_MB;
+
-    long double MEMORY_AVAILABLE_MB;
+    MemStat getMemStat();
-    long double MEMORY_ACTIVE_MB;
-    long double MEMORY_INACTIVE_MB;
 
     int UPDATE_INTERVAL; // ms
 

platform/linux/monitoring/cpu.cpp

@@ -3,7 +3,6 @@
 #include <iostream>
 #include <sstream>
 #include <fstream>
-#include <stdlib.h>
 #include <unistd.h>
 #include <math.h> 
 
@@ -20,8 +19,7 @@ void CPU::START_CPU_POLLING() {
     }
     this->m_isPolling = true;
     std::cout << "Starting CPU worker thread" << std::endl;
-    std::thread* t = new std::thread(&CPU::CPU_POLL, this);
+    this->m_pollThread = new std::thread(&CPU::CPU_POLL, this);
-    this->m_pollThread = t; 
 }
 
 void CPU::CPU_POLL(CPU* cpu) {

platform/linux/monitoring/memory.cpp

@@ -1,21 +1,90 @@
-#include <memory.h>
+#include <memstat.h>
+
+#include <iostream>
+#include <unistd.h>
+#include <sys/sysinfo.h>
+
+// struct sysinfo {
+//     long uptime;             /* Seconds since boot */
+//     unsigned long loads[3];  /* 1, 5, and 15 minute load averages */
+//     unsigned long totalram;  /* Total usable main memory size */
+//     unsigned long freeram;   /* Available memory size */
+//     unsigned long sharedram; /* Amount of shared memory */
+//     unsigned long bufferram; /* Memory used by buffers */
+//     unsigned long totalswap; /* Total swap space size */
+//     unsigned long freeswap;  /* swap space still available */
+//     unsigned short procs;    /* Number of current processes */
+//     unsigned long totalhigh; /* Total high memory size */
+//     unsigned long freehigh;  /* Available high memory size */
+//     unsigned int mem_unit;   /* Memory unit size in bytes */
+//     char _f[20-2*sizeof(long)-sizeof(int)]; /* IDFK what this does, it doesnt work without it*/
+// };
 
 Memory::Memory() {
+    this->UPDATE_INTERVAL = 1000;
+    this->m_isPolling = false;
+    memStat = new MemStat();
+    struct sysinfo info;
+    sysinfo(&info);
+    std::cout << "Total RAM Memory supported: " << info.totalram / 1.049e+6 << "MB" << std::endl;
+}
 
+MemStat Memory::getMemStat() {
+    MemStat stat;
+    this->Memory_Mutex.lock();
+    memcpy(&stat, this->memStat, sizeof(MemStat));
+    this->Memory_Mutex.unlock();
+    return stat;
 }
 
 void Memory::START_MEMORY_POLLING() {
-
+    if (this->m_isPolling) {
+        return;
+    }
+    this->m_isPolling = true;
+    std::cout << "Starting memory worker thread" << std::endl;
+    m_pollThread = new std::thread(&Memory::MEMORY_POLL, this);
 }
 
-void Memory::MEMORY_POLL() {
+void Memory::MEMORY_POLL(Memory* mem) {
+    std::cout << "New memory worker thread" << std::endl;
 
+    while (true) {
+        mem->Memory_Mutex.lock();
+        if (!mem->m_isPolling) {
+            mem->Memory_Mutex.unlock();
+            return;
+        }
+        mem->Memory_Mutex.unlock();
+
+        struct sysinfo info;
+        sysinfo(&info);
+
+        mem->Memory_Mutex.lock();
+
+        mem->memStat->TOTAL_MB  = info.totalram  / 1.049e+6;
+        mem->memStat->FREE_MB   = info.freeram   / 1.049e+6;
+        mem->memStat->SHARED_MB = info.sharedram / 1.049e+6;
+        mem->memStat->BUFFER_MB = info.bufferram / 1.049e+6;
+        mem->memStat->TOTAL_RUNNING_PROCS = info.procs;
+
+        mem->Memory_Mutex.unlock();
+
+        sleep(1);
+    }
 }
 
-void Memory::END_MEMORY_POLLING(Memory* memory) {
+void Memory::END_MEMORY_POLLING() {
-
+    if (!this->m_isPolling) {
+        return;
+    }
+    this->m_isPolling = false;
+    m_pollThread->join();
+    delete m_pollThread;
 }
 
 Memory::~Memory() {
-
+    this->m_isPolling = false;
+    m_pollThread->join();
+    delete m_pollThread;
 }

src/main.cpp

@@ -1,5 +1,5 @@
 #include <cpu.h>
-#include <memory.h>
+#include <memstat.h>
 
 #include <iostream>
 #include <unistd.h>
@@ -16,9 +16,9 @@ int main(int argc, char** argv) {
 
     while(1) {
         sleep(1);
+        std::cout << std::endl;
         for (unsigned int thread = 0; thread <= cpu->CPU_HARDWARE_THREADS; thread++) {
             std::cout << "CORE " << thread << " USAGE: " << cpu->CPU_PERCENT(thread) << std::endl;
         }
-        std::cout << std::endl;
     }
 }