信号量Semaphore

#include <iostream>
#include <windows.h>

using namespace std;



long g_lNum;

unsigned int _stdcall ThreadFun(void *pPM);

const int THREAD_NUM = 10;

CRITICAL_SECTION g_csThreadCode;

HANDLE hSemaphore;



int main()
{
	g_lNum = 0;
	
	HANDLE handle[10];
	
	int i = 0;
	
	InitializeCriticalSection(&g_csThreadCode);
	
	hSemaphore = CreateSemaphore(NULL, 0, 1, NULL);
	
	while(i < THREAD_NUM)
	{	
		
		handle[i] = (HANDLE)_beginthreadex(NULL, 0, ThreadFun, &i, 0, NULL);		
		i++;
		WaitForSingleObject(hSemaphore, INFINITE);
		
	}
	
	printf("end:%d\n", g_lNum);
	
	WaitForMultipleObjects(THREAD_NUM, handle, TRUE, INFINITE);
	
	DeleteCriticalSection(&g_csThreadCode);
	
	CloseHandle(hSemaphore);

	return 0;
}


unsigned int _stdcall ThreadFun(void *pPM)
{
	int nThreadNum = *(int *)pPM;
		
	//EnterCriticalSection(&g_csThreadCode);
	Sleep(100);
	g_lNum++;
	Sleep(0);	
	printf("i:%d,g_lNum:%d\n", nThreadNum, g_lNum);
	//LeaveCriticalSection(&g_csThreadCode);
	
	ReleaseSemaphore(hSemaphore, 1, NULL);
	//while(true);
		
	return 0;
	
}