Windows核心编程条件变量

本文主要是介绍Windows核心编程条件变量，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

#include"stdafx.h"
#include<windows.h>  
#include<tchar.h>  
#include<vector>  
#include<iostream>  
#include<process.h>  
using namespace std;  
  
DWORD WINAPI ThreadProduce(PVOID pvParam);  
DWORD WINAPI ThreadUser1(PVOID pvParam);  
DWORD WINAPI ThreadUser2(PVOID pvParam);  
  
vector<int> ivec;  
  
SRWLOCK g_lock;  
SRWLOCK g_lock2;  
CONDITION_VARIABLE g_ConditionVar;  
  
  
int _tmain()  
{  
  
    InitializeSRWLock(&g_lock);  //初始化锁  
  
    HANDLE hThread1 = (HANDLE)_beginthreadex(NULL,0,(unsigned int(_stdcall *)(void*))ThreadProduce,NULL,0,0);  
  
  
    HANDLE hThread2 = (HANDLE)_beginthreadex(NULL, 0, (unsigned int(_stdcall *)(void*))ThreadUser1, NULL, 0, 0);  
    HANDLE hThread3 = (HANDLE)_beginthreadex(NULL, 0, (unsigned int(_stdcall *)(void*))ThreadUser2, NULL, 0, 0);  
  
    CloseHandle(hThread1);  
    CloseHandle(hThread2);  
    CloseHandle(hThread3);  
    _gettchar();  
    return 0;  
}  
DWORD WINAPI ThreadProduce(PVOID pvParam)  
{  
    for (int i = 0; i < 10000; i++)  
    {  
        AcquireSRWLockExclusive(&g_lock); //获得SRW锁  
        ivec.push_back(i);  
        ReleaseSRWLockExclusive(&g_lock);//释放SRW锁  
        WakeConditionVariable(&g_ConditionVar);//因为每次执行完push_back后，容器里卖弄就会必定至少有一个元素(生产者)  
        //生产出东西了，这时候阻塞在Sleep*里面的线程就会被唤醒(读取者sleep线程)  
        Sleep(1);//停一下，让读取者先读  
    }  
    return 0;  
}  
  
DWORD WINAPI ThreadUser1(PVOID pvParam)  
{  
    while (1)  
    {  
        AcquireSRWLockExclusive(&g_lock);  
        while (ivec.empty())  
        {  
            cout << "等待写入" << endl;  
            //如果容器是空的，也就是没有内容可以读，那么让线程进入睡眠状态，一直到调用WakeConditionAllVariable(&g_ConditionVar)  
            SleepConditionVariableSRW(&g_ConditionVar,&g_lock,INFINITE,0);  
        }  
  
        cout << "线程1：" << ivec.back() << endl;  
        ivec.pop_back();  
        ReleaseSRWLockExclusive(&g_lock);  
    }  
    return 0;  
}  
DWORD WINAPI ThreadUser2(LPVOID pvParam)  
{  
    while (1)  
    {  
        AcquireSRWLockExclusive(&g_lock);  
  
        while (ivec.empty())  
        {  
            cout << "等待写入2"<<endl;  
            SleepConditionVariableSRW(&g_ConditionVar, &g_lock, INFINITE, 0);  
        }  
        cout << "线程2：" << ivec.back() << endl;  
        ivec.pop_back();  
        ReleaseSRWLockExclusive(&g_lock);  
    }  
    return 0;  
}

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