[C++] socket - 6 [API互斥事件对象实现线程同步]

/*API互斥事件对象实现线程同步*/
#include<windows.h>
#include<stdio.h>
DWORD WINAPI myfun1(LPVOID lpParameter);//声明线程函数
DWORD WINAPI myfun2(LPVOID lpParameter);
static int a=0;
HANDLE hmutex;//互斥事件对象
int main()
{
HANDLE h1,h2;//定义句柄变量
hmutex=::CreateMutex(NULL,FALSE,NULL);//创建互斥事件并返回其句柄
h1=::CreateThread(NULL,0,myfun1,NULL,0,NULL);//创建线程1
printf("线程1开始运行！\r\n");
h2=::CreateThread(NULL,0,myfun2,NULL,0,NULL);//创建线程2
printf("线程2开始运行！\t\n");
::CloseHandle(h1);//关闭线程句柄对象
::CloseHandle(h2);
::Sleep(100000);
return 0;
}
DWORD WINAPI myfun1(LPVOID lpParameter)//线程函数
{
while(1)
{
::WaitForSingleObject(hmutex,INFINITE);//请求互斥事件
if(a<100)
{
::Sleep(1000);
a+=1;
printf("线程1：%d\r\n",a);
::ReleaseMutex(hmutex);
}
else
{
::ReleaseMutex(hmutex);//释放互斥事件句柄
break;
}
}
return 0;
}
DWORD WINAPI myfun2(LPVOID lpParameter)
{
while(1)
{
::WaitForSingleObject(hmutex,INFINITE);//请求事件对象
if(a<100)
{
::Sleep(1000);
a+=1;
printf("线程2：%d\r\n",a);
::ReleaseMutex(hmutex);
}
else
{
::ReleaseMutex(hmutex);
break;
}
}
return 0;
}