windows下多線程（生產者消費者問題：3個生產者，一個消費者，4個緩衝區）

原作者提供源碼為兩種情況：

第一種：1生產者1消費者1緩衝區

第二種：1生產者 2消費者 4緩衝區

========================下面為修改作者源碼得到的 3個生產者1個消費者4個緩衝區的情況================== 

//1生產者 2消費者 4緩衝區  #include <stdio.h>  #include <process.h>  #include <windows.h>  //設定控制台輸出顏色  BOOL SetConsoleColor(WORD wAttributes)  {      HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);      if (hConsole == INVALID_HANDLE_VALUE)          return FALSE;            return SetConsoleTextAttribute(hConsole, wAttributes);  }  const int END_PRODUCE_NUMBER = 9;  //生產產品個數  const int BUFFER_SIZE = 4;          //緩衝區個數  int g_Buffer[BUFFER_SIZE];          //緩衝池  int g_i, g_j;  //訊號量與關鍵段  CRITICAL_SECTION g_cs;  HANDLE g_hSemaphoreBufferEmpty, g_hSemaphoreBufferFull;  int data=0;//生產者線程函數  unsigned int __stdcall ProducerThreadFun(PVOID pM)  {      //for (int i = 1; i <= END_PRODUCE_NUMBER; i++)      //{  while(data<END_PRODUCE_NUMBER){        //等待有空的緩衝區出現          WaitForSingleObject(g_hSemaphoreBufferEmpty, INFINITE);            //互斥的訪問緩衝區          EnterCriticalSection(&g_cs); if(data==END_PRODUCE_NUMBER){LeaveCriticalSection(&g_cs);break;}data=data+1;        g_Buffer[g_i] = data;          //printf("生產者在緩衝池第%d個緩衝區中投放資料%d\n", g_i, g_Buffer[g_i]);printf("編號為%d的生產者在緩衝池中第%d個緩衝區中投放資料%d\n", GetCurrentThreadId(), g_i, g_Buffer[g_i]);         g_i = (g_i + 1) % BUFFER_SIZE;          LeaveCriticalSection(&g_cs); Sleep(50);        //通知消費者有新資料了          ReleaseSemaphore(g_hSemaphoreBufferFull, 1, NULL);  }/*    } */     printf("生產者完成任務，線程結束運行\n");      return 0;  }  //消費者線程函數  unsigned int __stdcall ConsumerThreadFun(PVOID pM)  {      while (true)      {          //等待非空的緩衝區出現          WaitForSingleObject(g_hSemaphoreBufferFull, INFINITE);                    //互斥的訪問緩衝區          EnterCriticalSection(&g_cs);          SetConsoleColor(FOREGROUND_GREEN);          /*printf("  編號為%d的消費者從緩衝池中第%d個緩衝區取出資料%d\n", GetCurrentThreadId(), g_j, g_Buffer[g_j]); */ printf("  編號為%d的消費者從緩衝池第%d個緩衝區取出資料%d\n",GetCurrentThreadId(), g_j, g_Buffer[g_j]);        SetConsoleColor(FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);          if (g_Buffer[g_j] == END_PRODUCE_NUMBER)//結束標誌          {              LeaveCriticalSection(&g_cs);              //通知其它消費者有新資料了(結束標誌)              //ReleaseSemaphore(g_hSemaphoreBufferFull, 1, NULL);              break;          }          g_j = (g_j + 1) % BUFFER_SIZE;          LeaveCriticalSection(&g_cs);            Sleep(50); //some other work to do            ReleaseSemaphore(g_hSemaphoreBufferEmpty, 1, NULL);      }      SetConsoleColor(FOREGROUND_GREEN);      printf("  編號為%d的消費者收到通知，線程結束運行\n", GetCurrentThreadId());      SetConsoleColor(FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE);      return 0;  }  int main()  {      printf("  生產者消費者問題   3生產者 1消費者 4緩衝區\n");      printf(" -- by MoreWindows( http://blog.csdn.net/MoreWindows ) --\n\n");        InitializeCriticalSection(&g_cs);      //初始化訊號量,一個記錄有產品的緩衝區個數,另一個記錄空緩衝區個數.      g_hSemaphoreBufferEmpty = CreateSemaphore(NULL, 4, 4, NULL);      g_hSemaphoreBufferFull  = CreateSemaphore(NULL, 0, 4, NULL);      g_i = 0;      g_j = 0;      memset(g_Buffer, 0, sizeof(g_Buffer));        const int THREADNUM = 4;      HANDLE hThread[THREADNUM];      //生產者線程 3個     hThread[0] = (HANDLE)_beginthreadex(NULL, 0, ProducerThreadFun, NULL, 0, NULL);  hThread[1] = (HANDLE)_beginthreadex(NULL, 0, ProducerThreadFun, NULL, 0, NULL);      hThread[2] = (HANDLE)_beginthreadex(NULL, 0, ProducerThreadFun, NULL, 0, NULL);     //消費者線程 1個    hThread[3] = (HANDLE)_beginthreadex(NULL, 0, ConsumerThreadFun, NULL, 0, NULL);     WaitForMultipleObjects(THREADNUM, hThread, TRUE, INFINITE);      for (int i = 0; i < THREADNUM; i++)          CloseHandle(hThread[i]);        //銷毀訊號量和關鍵段      CloseHandle(g_hSemaphoreBufferEmpty);      CloseHandle(g_hSemaphoreBufferFull);      DeleteCriticalSection(&g_cs);      return 0;  } 

運行結果如下：

reference：http://blog.csdn.net/morewindows/article/details/7577591