VS2010 多线程 进程互斥

来源:百度文库 编辑:神马文学网 时间:2024/05/04 03:04:24
#include
#include
#include
using namespace std;
DWORD WINAPI Fun1Proc(
 LPVOID lpParameter   // thread data
);DWORD WINAPI Fun2Proc(
 LPVOID lpParameter   // thread data
);
int index=0;
int tickets=100;
HANDLE hMutex;
void main()
{
 HANDLE hThread1;
 HANDLE hThread2;
 hThread1=CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
 hThread2=CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
 CloseHandle(hThread1);
 CloseHandle(hThread2);
  hMutex=CreateMutex(NULL,false,_T("tickets"));//第二个变量为true时当前线程拥有互斥对象的所有权,否则不拥有
 if(hMutex)
 {
  if(ERROR_ALREADY_EXISTS==GetLastError())
  {
   cout<<"only instance can run!"<   return;
  }
 }
 /*WaitForSingleObject(hMutex,INFINITE);
 ReleaseMutex(hMutex);
 ReleaseMutex(hMutex);*/
  Sleep(4000);//主线程放弃执行权4s
}DWORD WINAPI Fun1Proc(
  LPVOID lpParameter   // thread data
)
{
 
 while(TRUE)//线程1,一直执行
 {
   WaitForSingleObject(hMutex,INFINITE);//请求互斥对象所有权
  if(tickets>0)
  {
   //Sleep(1);
   cout<<"thread1 sell ticket : "<  }
  else
   break;
  ReleaseMutex(hMutex););//释放互斥对象所有权

 }  return 0;
}DWORD WINAPI Fun2Proc(
  LPVOID lpParameter   // thread data
)
{
 
 while(TRUE)
 {
  //ReleaseMutex(hMutex);
  WaitForSingleObject(hMutex,INFINITE);
  if(tickets>0)
  {
   //Sleep(1);
   cout<<"thread2 sell ticket : "<  }
  else
   break;
  ReleaseMutex(hMutex);
 }
  return 0;
} 说明,在一个子线程结束时,该线程所对应的请求的互斥对象都会被自动释放,且请求的互斥对象句柄也被置为0。