Windows_41_thread_semaphore Thread-Signal

Windows_41_thread_semaphore Thread-Signal

  
 

   
  

  
// windows_41_Thread_Semaphore.cpp : 定义控制台应用程序的入口点。
   
  

  
//
   
  

  

   
  

  
#include "stdafx.h"
   
  

  
#include "windows.h"
   
  

  
/*
   
  

  
 效果：前面很快出五个，后面一秒出一个
   
  

  
*/
   
  

  
//1、创建信号量
   
  

  
//CreateSemaphore
   
  

  
//2、等候信号量
   
  

  
//WaitForSingleObject
   
  

  
//WaitForMultipleObjects
   
  

  
//3、释放信号
   
  

  
//ReleaseSemaphore
   
  

  
//4、关闭信号量
   
  

  
//CloseHandle
   
  

  
HANDLE g_hSemaphore = NULL;
   
  

  

   
  

  
//输入1或者5发送1或者5个信号量
   
  

  
DWORD WINAPI ThreadSend3( LPVOID pParam )
   
  

  
{
   
  

  
 while (true)
   
  

  
 {
   
  

  
 //3、释放信号
   
  

  
 //ReleaseSemaphore
   
  

  
 Sleep( 1000 );
   
  

  
 CHAR ch = getchar( );
   
  

  
 switch (ch)
   
  

  
 {
   
  

  
 case ‘1‘:
   
  

  
 //释放信号
   
  

  
 ReleaseSemaphore( g_hSemaphore, 1, NULL );
   
  

  
 break;
   
  

  
 case ‘5‘:
   
  

  
 ReleaseSemaphore( g_hSemaphore, 5, NULL );
   
  

  
 break;
   
  

  
 }
   
  

  
 }
   
  

  
 return 0;
   
  

  
}
   
  

  

   
  

  
DWORD WINAPI ThreadSend( LPVOID pParam )
   
  

  
{
   
  

  
 while (true)
   
  

  
 {
   
  

  
//3、释放信号
   
  

  
//ReleaseSemaphore
   
  

  
 ReleaseSemaphore( g_hSemaphore, 1, NULL );
   
  

  
 Sleep( 1000 );
   
  

  
 }
   
  

  
 return 0;
   
  

  
}
   
  

  

   
  

  
DWORD WINAPI ThreadRecv( LPVOID pParam )
   
  

  
{
   
  

  
 while (true)
   
  

  
 {
   
  

  
 WaitForSingleObject( g_hSemaphore, INFINITE );
   
  

  
 printf( "Hello Semaphore\n" );
   
  

  
 Sleep( 100 );
   
  

  
 }
   
  

  
 return 0;
   
  

  
}
   
  

  
void Create( )
   
  

  
{
   
  

  
 DWORD nThreadID = 0;
   
  

  
 HANDLE hThread[2] = { 0 };
   
  

  

   
  

  
 HThread  [ 0  ]    Span class= "pun" >=   createthread   (   NULL     0     threadsend   ,   NULL     0    ,&  nthreadid    
   
  

  
 hThread[1] = CreateThread( NULL, 0, ThreadRecv, NULL, 0 ,&nThreadID);
   
  

  

   
  

  
 // 等候两个线程的结束
   
  

  
 WaitForMultipleObjects( 2, hThread, TRUE, INFINITE );
   
  

  
}
   
  

  
int _tmain(int argc, _TCHAR* argv[])
   
  

  
{
   
  

  

   
  

  
//1、创建信号量
   
  

  
//CreateSemaphore
   
  

  
 g_hSemaphore = CreateSemaphore( NULL, 5, 10, NULL );
   
  

  
 Create( );
   
  

  

   
  

  
//4、关闭信号量
   
  

  
//CloseHandle
   
  

  
 CloseHandle( g_hSemaphore );
   
  

  
return 0;
   
  

  
}
  
 

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Windows_41_thread_semaphore Thread-Signal