MSBD_P273（俩窗口售票问题）

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

DWORD WINAPI Fun1Proc(LPVOID lpParameter);	//thread data
DWORD WINAPI Fun2Proc(LPVOID lpParameter);	//thread data

int index = 0;
int tickets = 10;
HANDLE hMutex;

int main() {
	HANDLE hThread1;
	HANDLE hThread2;

	//创建线程
	hThread1 = CreateThread(NULL, 0, Fun1Proc, NULL, 0, NULL);
	hThread2 = CreateThread(NULL, 0, Fun2Proc, NULL, 0, NULL);
	CloseHandle(hThread1);
	CloseHandle(hThread2);

	//创建互斥对象
	hMutex = CreateMutex(NULL, TRUE, "tickets");
	/*if (hMutex) {
		if (ERROR ALREADY EXISTS == GetLastError()) {
			cout << "only one instance can run!" << endl;
			return 0;
		}
	}*/
	WaitForSingleObject(hMutex, INFINITE);
	ReleaseMutex(hMutex);
	ReleaseMutex(hMutex);

	Sleep(4000);
	system("pause");
	return 0;
}

//线程1的入口函数
DWORD WINAPI Fun1Proc(LPVOID lpParameter) {	//thread data
	while (true) {
		ReleaseMutex(hMutex);
		WaitForSingleObject(hMutex, INFINITE);
		if (tickets > 0) {
			Sleep(1);
			cout << "thread1 sell ticket :" << tickets-- << endl;
		}
		else
			break;
		ReleaseMutex(hMutex);
	}

	return 0;
}

//线程2的入口函数
DWORD WINAPI Fun2Proc(LPVOID lpParameter) {	//thread data
	while (true) {
		ReleaseMutex(hMutex);
		WaitForSingleObject(hMutex, INFINITE);
		if (tickets > 0) {
			Sleep(1);
			cout << "thread2 sell ticket :" << tickets-- << endl;
		}
		else
			break;
		ReleaseMutex(hMutex);
	}

	return 0;
}