三个线程打印ABC10次，ABCABCABC....

Posted 2020-09-26

// ConsoleApplication2.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <iostream>
#include "windows.h"
#include<string>

using namespace std;

HANDLE hEventA;
HANDLE hEventB;
HANDLE hEventC;

DWORD WINAPI funproc(LPVOID lpparentet)
{
    string  s = (char * )lpparentet;
    int count = 0;

    string sA = "A";
    string sB = "B";
    string sC = "C";
    
    while (count < 10)
    {
        Sleep(100);
        if (sA.compare(s)==0)
        {
            DWORD dwRet = WaitForSingleObject(hEventA, INFINITE);
            if (dwRet == WAIT_OBJECT_0)
            {
                printf("A");
                count++;
                SetEvent(hEventB);
            }
        }

        if (sB.compare(s) == 0)
        {
            DWORD dwRet = WaitForSingleObject(hEventB, INFINITE);
            if (dwRet == WAIT_OBJECT_0)
            {
                printf("B");
                count++;
                SetEvent(hEventC);
            }
        }

        if (sC.compare(s) == 0)
        {
            DWORD dwRet = WaitForSingleObject(hEventC, INFINITE);
            if (dwRet == WAIT_OBJECT_0)
            {
                printf("C");
                count++;
                SetEvent(hEventA);
            }
        }
    }

    return 0;
}

int main()
{
    hEventA = CreateEvent(NULL, false, true, NULL);
    hEventB = CreateEvent(NULL, false, false, NULL);
    hEventC = CreateEvent(NULL, false, false, NULL);

    HANDLE hThreadA = CreateThread(NULL, 0, funproc, "A", 0, NULL);
    HANDLE hThreadB = CreateThread(NULL, 0, funproc, "B", 0, NULL);
    HANDLE hThreadC = CreateThread(NULL, 0, funproc, "C", 0, NULL);

    Sleep(10000);


    return 0;
}