事件对象互斥对象对线程的同步

最新推荐文章于 2021-06-10 14:49:58 发布

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最新推荐文章于 2021-06-10 14:49:58 发布

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/xiaopengblog/p/3507676.html

本文展示了一个使用Windows API创建和管理多线程的应用程序示例。通过两个线程交替打印票务信息来演示线程间的同步机制。利用事件对象进行线程间的通信，确保线程能够有序执行。

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

DWORD WINAPI Fun1proc(LPVOID lpParameter); // thread data
DWORD WINAPI Fun2proc(LPVOID lpParameter);
int ticket = 100;
//HANDLE hMutex;
HANDLE g_hEvent;

void main()
{
   DWORD dThreadID1 = 123;
   DWORD dThreadID2 = 456;
   HANDLE hThread1 = CreateThread(NULL,0,Fun1proc,NULL,0,&dThreadID1);
   HANDLE hThread2 = CreateThread(NULL,0,Fun2proc,NULL,0,&dThreadID2);
   CloseHandle(hThread1);
    CloseHandle(hThread2);
   g_hEvent = CreateEvent(NULL,FALSE,FALSE,"ticket");//最开始创造自动非信号状态
   SetEvent(g_hEvent);//设状态置为有信号
//   hMutex = CreateMutex(NULL,TRUE,"ticket");
   if (g_hEvent)
   {
       if (ERROR_ALREADY_EXISTS == GetLastError())
       {
           cout<<"only one instance can run"<<endl;//只有一个事例可以运行
           return;
       }

   }
//    WaitForSingleObject(hMutex,INFINITE);
//    ReleaseMutex(hMutex);
//    ReleaseMutex(hMutex);
   Sleep(4000);
}
DWORD WINAPI Fun1proc(LPVOID lpParameter)
{

   while (TRUE)
   {
       WaitForSingleObject(g_hEvent,INFINITE);
       if (ticket>0)
       {
           //Sleep(3);
           cout<<"thread1 sailed "<<ticket--<<endl;
       }
       else
           break;
   //   ReleaseMutex(hMutex);
       SetEvent(g_hEvent);

   }

   return 0;
}

DWORD WINAPI Fun2proc(LPVOID lpParameter)
{

   while (TRUE)
   {
      WaitForSingleObject(g_hEvent,INFINITE);
       if (ticket>0)
       {
       //   Sleep(3);
           cout<<"thread2 sailed "<<ticket--<<endl;
       }
       else
           break;
//       ReleaseMutex(hMutex);
       SetEvent(g_hEvent);
   }
   return 0;
}

/*
#include "windows.h"
#include "iostream.h"

DWORD WINAPI FunProc1(LPVOID lpParameter);
DWORD WINAPI FunProc2(LPVOID lpParameter);

int index=0;
int ticket=100;
void main()
{
   HANDLE hThread1;
   HANDLE hThread2;
   hThread1=CreateThread(NULL,0,FunProc1,NULL,0,NULL);
   hThread2=CreateThread(NULL,0,FunProc2,NULL,0,NULL);

   CloseHandle(hThread1);
   Sleep(4000);
}

DWORD WINAPI FunProc1(LPVOID lpParameter)
{
   while(TRUE)
   {
       if(ticket>0)
       {
           cout<<"ticket 1:"<<ticket--<<endl;
       }
       else
           break;
   }
   return 0;
}

DWORD WINAPI FunProc2(LPVOID lpParameter)
{
   while(TRUE)
   {
       if(ticket>0)
       {
           cout<<"ticket 2:"<<ticket--<<endl;
       }
       else
           break;
   }
   return 0;
}
*/