Biegral Blog

      还是以售票系统为例：

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

DWORD WINAPI Fun1Proc(LPVOID lpParameter);
DWORD WINAPI Fun2Proc(LPVOID lpParameter);

int tickets = 100;
HANDLE g_hEvent; //	事件对象

int main()
{
	HANDLE hThread1;
	HANDLE hThread2;

	// 要实现线程同步，第二个参数必须是FALSE
	g_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

	hThread1 = CreateThread(NULL, 0, Fun1Proc, NULL, 0, NULL);
	hThread2 = CreateThread(NULL, 0, Fun2Proc, NULL, 0, NULL);
	CloseHandle(hThread1);
	CloseHandle(hThread2);

	SetEvent(g_hEvent);  // 将事件对象设置为有信号状态（互斥对象一产生便有信号）

	Sleep(4000);
	CloseHandle(g_hEvent);

	return 0;
}

DWORD WINAPI Fun1Proc(LPVOID lpParameter)
{
	while(1)
	{
		WaitForSingleObject(g_hEvent, INFINITE);

		if(tickets > 0)
		{
			Sleep(1);
			cout << "thread1 sell ticket : " << tickets-- << endl;
			SetEvent(g_hEvent); // 将事件对象设置为有信号状态（类似于互斥对象的释放）
		}
		else
		{
			break;
		}
	}
	
	return 0;
}

DWORD WINAPI Fun2Proc(LPVOID lpParameter)
{
	while(1)
	{
		WaitForSingleObject(g_hEvent, INFINITE);

		if(tickets > 0)
		{
			Sleep(1);
			cout << "thread2 sell ticket : "<< tickets-- << endl;
			SetEvent(g_hEvent); // 将事件对象设置为有信号状态（类似于互斥对象的释放）
		}
		else
		{
			break;
		}
	}
	
	return 0;
}