线程互斥

最新推荐文章于 2024-11-27 23:12:30 发布

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本文通过一个C++示例展示了如何使用互斥锁实现线程间的同步操作。两个线程交替打印消息，确保了在共享资源访问时不会发生冲突。

/************************************************************************/
///unsigned long _beginthreadex( void *security,      //Security descriptor for new thread; must be NULL for Windows 95 applications
//         unsigned stack_size,
//          unsigned ( __stdcall *start_address )( void * ),
//          void *arglist,       //传给新线程的参数列表，默认为0
//          unsigned initflag,      //Initial state of new thread (0 for running or CREATE_SUSPEND for suspended)
//          unsigned *thrdaddr );     //Points to a 32-bit variable that receives the thread identifier
//unsigned long _beginthread( void( __cdecl *start_address )( void * ), //Start address of routine that begins execution of new thread
//        unsigned stack_size,     //Stack size for new thread or 0
//        void *arglist );         //Argument list to be passed to new thread or NULL
/************************************************************************/

#include <PROCESS.H>
#include <stdio.h>
#include <windows.h>
#include <CONIO.H>

#define SLEEP_SECOND 2000

static int g_count=5;

HANDLE hMutex;

void thread_proc1(void* arg)
{

while(g_count>0)
    {
DWORD dReturn = WaitForSingleObject(hMutex,INFINITE);
printf("proc1 is running...\n");
// cout<<endl;
    ReleaseMutex(hMutex);

//  Sleep(1000);
//  printf("proc1 is ending...\n");
//  printf("thread[1] %d__%s\n",g_count--,((char*)arg));
  //_endthread();
  //_endthreadex();
}
}

void thread_proc2(void* arg)
{
while(g_count>0)
    {
DWORD dReturn = WaitForSingleObject(hMutex,INFINITE);
printf("proc2 is running...\n");
// cout<<endl;
Sleep(1000);
    ReleaseMutex(hMutex);


//  printf("proc2 is ending...\n");

//_endthread();
}
}

int main(void)
{
//static unsigned pid;

hMutex = CreateMutex(NULL,FALSE,"");
char *pstr=" 参数传递成功\n";
// _beginthreadex(NULL,0,(unsigned (__stdcall*)(void*))thread_proc1,0,0,0);
// _beginthreadex(NULL,0,(unsigned (__stdcall*)(void*))thread_proc2,0,0,0);

_beginthread(thread_proc1,0,pstr);
_beginthread(thread_proc2,0,pstr);
printf("hello");

getch();
return (0);
}