37 windows_37_Thread_InterLock 线程-原子锁

windows_37_Thread_InterLock 线程-原子锁

// windows_37_Thread_InterLock.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "windows.h"

long g_nValue1 = 0;
long g_nValue2 = 0;

DWORD WINAPI InterProc1( LPVOID pParam )
{
  for (int nIndex = 0; nIndex < 10000000;nIndex++)
  {
    //普通的加加
    g_nValue1++;
  }
  return 0;
}
DWORD WINAPI InterProc2( LPVOID pParam )
{
  for (int nIndex = 0; nIndex < 100;nIndex++)
  {
    //原子锁加加
    //g_nValue2++;
    InterlockedIncrement( &g_nValue2 );
  }
  return 0;
}

void Create( )
{
  DWORD nThreadID = 0;
  HANDLE hThread[4] = { NULL };
  hThread[0] = CreateThread( NULL, 0, InterProc1, NULL, 0, &nThreadID );
  hThread[1] = CreateThread( NULL, 0, InterProc1, NULL, 0, &nThreadID );
  hThread[2] = CreateThread( NULL, 0, InterProc2, NULL, 0, &nThreadID );
  hThread[3] = CreateThread( NULL, 0, InterProc2, NULL, 0, &nThreadID );
  WaitForMultipleObjects( 4, hThread, FALSE, INFINITE );
  printf( "%ld\n", g_nValue1 );
  printf( "%ld\n", g_nValue2 );

}
int _tmain(int argc, _TCHAR* argv[])
{
  Create( );
	return 0;
}

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