C++多线程同步（采用事件对象Event）

来源：互联网发布：一路一带破产知乎编辑：程序博客网时间：2024/05/02 02:03

#include <Windows.h>#include <iostream>using namespace std;DWORD  WINAPI  Fun1Proc(LPVOID lpParameter);//线程1的入口函数DWORD  WINAPI  Fun2Proc(LPVOID lpParameter);//线程2的入口函数int g_tickets = 100;//总票数HANDLE g_hEvent;//全局事件对象void main(){HANDLE hThread1;HANDLE hThread2;//创建自动重置事件内核对象g_hEvent = CreateEvent(NULL,FALSE, FALSE, "tickets");//保证应用程序只有一个实例if (g_hEvent){if (ERROR_ALREADY_EXISTS == GetLastError()){cout<<"只有一个实例可以运行！"<<endl;return;}}SetEvent(g_hEvent);//设置事件对象为有信号//创建线程hThread1 = CreateThread(NULL, 0 , Fun1Proc, NULL, 0, NULL);hThread2 = CreateThread(NULL, 0 , Fun2Proc, NULL, 0, NULL);CloseHandle(hThread1);//并没有终止线程的运行；当不再需要线程句柄时，应将其关闭，让这个线程内核对象的引用计数减1CloseHandle(hThread2);//让主线程睡眠4秒Sleep(4000);//关闭事件对象句柄CloseHandle(g_hEvent);}DWORD  WINAPI  Fun1Proc(LPVOID lpParameter){while (TRUE){//请求事件对象WaitForSingleObject(g_hEvent,INFINITE);if (g_tickets>0){Sleep(1);cout<<"Thread1 sell ticket :"<<g_tickets--<<endl;SetEvent(g_hEvent);}else{SetEvent(g_hEvent);break;}}return 0;}DWORD  WINAPI  Fun2Proc(LPVOID lpParameter){while (TRUE){//请求事件对象WaitForSingleObject(g_hEvent,INFINITE);if (g_tickets>0){Sleep(1);cout<<"Thread2 sell ticket :"<<g_tickets--<<endl;SetEvent(g_hEvent);}else{SetEvent(g_hEvent);break;}}return 0;}

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