线程同步之事件对象

线程同步: 让线程协同步调，按照一定的先后次序来执行

当人工重置的事件得到通知时，等待该事件的所有线程均变为可调度线程。
当一个自动重置的事件得到通知时，等待该事件的线程中只有一个线程变为可调度线程。

参考：
多线程与事件对象
多线程编程(13) - 多线程同步之 Event (事件对象)

#include <windows.h>
#include <iostream>
using namespace std;

DWORD WINAPI Fun1Proc(
	LPVOID lpParameter   // thread data
	);

DWORD WINAPI Fun2Proc(
	LPVOID lpParameter   // thread data
	);

int tickets = 100;
HANDLE g_hEvent;

void main()
{
	HANDLE hThread1;
	HANDLE hThread2;
	hThread1 = CreateThread(NULL, 0, Fun1Proc, NULL, 0, NULL);
	hThread2 = CreateThread(NULL, 0, Fun2Proc, NULL, 0, NULL);
	CloseHandle(hThread1);
	CloseHandle(hThread2);

	g_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);//自动的、无信号状态
	SetEvent(g_hEvent);//设置事件信号为触发
	Sleep(4000);

}

DWORD WINAPI Fun1Proc(
	LPVOID lpParameter   // thread data
	)
{
	while (TRUE)
	{
		WaitForSingleObject(g_hEvent, INFINITE);
		if (tickets>0)
		{
			Sleep(1);
			cout << "thread1 sell ticket : " << tickets << endl;
			tickets--;
		}
		else
			break;
		SetEvent(g_hEvent);
	}

	return 0;
}

DWORD WINAPI Fun2Proc(
	LPVOID lpParameter   // thread data
	)
{

	while (TRUE)
	{
		WaitForSingleObject(g_hEvent, INFINITE);
		if (tickets>0)
		{
			Sleep(1);
			cout << "thread2 sell ticket : " << tickets << endl;
			tickets--;
		}
		else
			break;
		SetEvent(g_hEvent);
	}

	return 0;
}