c實現生產者消費者源代碼

特注：運行該程序需要設置VC6.0環境
Project->Setting->C/C++->Category->Code Generation->Using Run-time library->Debug MultiThreaded

#include <iostream>
#include <list>
#include <windows.h>
#include <process.h>
using namespace std;

#define P(sem) WaitForSingleObject(sem,INFINITE)
#define V(sem) ReleaseSemaphore(sem,1,NULL)

class CQueue
{
public:
    void addTail();//往隊列尾部增加一個元素
    void removeHead();//讀出並移除隊列的第一個元素
private:
    list<int> L;
};

CQueue buffer;//全局的緩衝區
const int buf_size = 10;//緩衝區大小

static int GOODS_ID = 0;//商品序號

const int producers = 3;//生產者數量
const int consumers = 8;//消費者數量

void ProducerThread(void* param);
void ConsumerThread(void* param);

HANDLE empty,occupy,op_mutex;

int main()
{
    int i;
    int p_id[producers],c_id[consumers];
    occupy = CreateSemaphore(NULL,0,buf_size,NULL);//佔用位置
    empty = CreateSemaphore(NULL,buf_size,buf_size,NULL);//空餘位置
    op_mutex = CreateSemaphore(NULL,1,1,NULL);//操作互斥量

    for(i=0;i<producers;++i)
    {
        p_id[i] = i+1;
        _beginthread(ProducerThread,0,p_id+i);
    }
    for(i=0;i<consumers;++i)
    {
        c_id[i] = i+1;
        _beginthread(ConsumerThread,0,c_id+i);
    }
    while(getchar()=='\n') break;
    return 0;
}

void CQueue::addTail()
{
    L.insert(L.end(),++GOODS_ID);
}

void CQueue::removeHead()
{
    cout<<*L.begin()<<endl;
    L.erase(L.begin());
}

void ProducerThread(void* param)
{
    int id = *(int*)param;
    while(1)
    {
        P(empty);
        P(op_mutex);
        Sleep(100);
        buffer.addTail();
        printf("Producer_%d produced %d\n",id,GOODS_ID);
        V(op_mutex);
        V(occupy);
    }
}

void ConsumerThread(void* param)
{
    int id = *(int*)param;
    while(1)
    {
        P(occupy);
        P(op_mutex);
        Sleep(100);
        printf("Consumer_%d consumed ",id);
        buffer.removeHead();
        V(op_mutex);
        V(empty);
    }
}