多线程的坑--volatile

标签：多线程   volatile   

#include <pthread.h>
#include <iostream>
#include <unistd.h>
using namespace std;

//volatile bool g_brun = true;
bool g_brun = true;

void* TestThread1(void* arg)
{
    cout << "TestThread1 进入" << endl;

    long long ll = 0;
    while(g_brun)
        ll ++; 

    cout << "TestThread1 退出   ll:" << ll << endl;
}

void* TestThread2(void* arg)
{
    cout << "TestThread2 进入" << endl;
    g_brun = false;
    cout << "TestThread2 退出  设置 g_brun = false" << endl;
}

int main()
{
    pthread_t threadId1;
    pthread_create(&threadId1, NULL, TestThread1, NULL);
    usleep(1000000); // 保证TestThread1先执行
    pthread_t threadId2;
    pthread_create(&threadId2, NULL, TestThread2, NULL);

    pthread_join(threadId1,NULL);
    pthread_join(threadId2,NULL);

    return 0;
}

多线程的坑--volatile

标签：多线程   volatile   

原文地址：http://blog.51cto.com/13611395/2088655