beginthreadex 例子

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beginthreadex 例子

基础知识：

uintptr_t _beginthread(    void( *start_address )( void * ),   unsigned stack_size,   void *arglist );uintptr_t _beginthreadex(    void *security,   unsigned stack_size,   unsigned ( *start_address )( void * ),   void *arglist,   unsigned initflag,   unsigned *thrdaddr );

start_address 
Start address of a routine that begins execution of a new thread. For _beginthread, the calling 
convention is either __cdecl or __clrcall; for _beginthreadex, it is either __stdcall or __clrcall.
stack_size 
Stack size for a new thread or 0.
arglist 
Argument list to be passed to a new thread or NULL.
security 
Pointer to a SECURITY_ATTRIBUTES structure that determines whether the returned handle can be 
inherited by child processes. If NULL, the handle cannot be inherited. Must be NULL for Windows 
95 applications.
initflag 
Initial state of a new thread (0 for running or CREATE_SUSPENDED for suspended); use ResumeThread 
to execute the thread.
thrdaddr 
Points to a 32-bit variable that receives the thread identifier. Might be NULL, in which case it is 
not used.

在msdn中这样的例子：
是关于_beginthreadex的
// crt_begthrdex.cpp
// compile with: /MT
#include <windows.h>
#include <stdio.h>
#include <process.h>

unsigned Counter;
unsigned __stdcall SecondThreadFunc( void* pArguments )
{
printf( "In second thread...\n" );

while ( Counter < 1000000 )
Counter++;

_endthreadex( 0 );
return 0;
}

int main()
{
HANDLE hThread;
unsigned threadID;

printf( "Creating second thread...\n" );

// Create the second thread.
hThread = (HANDLE)_beginthreadex( NULL, 0, &SecondThreadFunc,   NULL, 0, &threadID ); //NULL表示无传递参数

          // Wait until second thread terminates. If you comment out the line
// below, Counter will not be correct because the thread has not
// terminated, and Counter most likely has not been incremented to
// 1000000 yet.
WaitForSingleObject( hThread, INFINITE );
printf( "Counter should be 1000000; it is-> %d\n", Counter );
// Destroy the thread object.
CloseHandle( hThread );
}

=======================

有传递参数：

#include <windows.h>
#include <stdio.h>
#include <process.h>

typedef struct play_s
{
int sliderRange;

} Play_Param;

unsigned Counter;
unsigned __stdcall SecondThreadFunc( void* pArguments )
{
          Play_Param *pp = (Play_Param *) pArguments;

int aa = pp->sliderRange;

          while ( Counter < 1000000 )
Counter++;

_endthreadex( 0 );
return 0;
}

int main()
{
HANDLE hThread;
          Play_Param param;

          param.sliderRange = 1000;
          hThread = (HANDLE)_beginthreadex( NULL, 0, &SecondThreadFunc, &param, 0, NULL);//&param表示传递参数
         WaitForSingleObject( hThread, INFINITE );
         CloseHandle( hThread );
}

---------------------

void Start(Play_Param *param)
{
setState(RUN);//设置运行标示

if( hThread == 0 && ::WaitForSingleObject(hThread ,1) == WAIT_TIMEOUT) //判断是否在运行
hThread = (HANDLE)_beginthreadex( NULL, 0, &SecondThreadFunc, param, 0, NULL );

}