多线程实现消息通信

多线程实现消息通信

在测试学习线程创建及通信过程中，测试多种方式，感觉此种较为简单易懂实用

#include <stdio.h>
#include <windows.h>

struct info
{
    HWND hWnd;
    DWORD dwThreadId;
    char* thing;
};

DWORD  WINAPI ThreadFun(LPVOID lpParam);// Main Thread
DWORD  WINAPI Thread1(LPVOID lpParam);    // Sub Thread

int main()
{
    info Info;
    char th[] = "somthing";
    Info.hWnd = GetActiveWindow();//GetSafeHwnd(); // get current HWND
    Info.thing = th;
    DWORD dwThreadID;
    HANDLE hThread = CreateThread(NULL,0, ThreadFun,&Info, NULL,&dwThreadID);
    Info.dwThreadId = dwThreadID;
    WaitForSingleObject(hThread, INFINITE);
    CloseHandle(hThread);
    HANDLE hCurrentProc = GetCurrentProcess();
    printf("%08X %08X
", hThread, hCurrentProc);
    
    return 0;
}

DWORD  WINAPI ThreadFun(LPVOID lpParam)
{
    info* Info = (info*)lpParam;//传递的消息结构体
    printf("Thread Start!!!!!
");
    
    printf("ThreadID %d
", Info->dwThreadId);//
    MSG msg;
    
    info mInfo;
    mInfo.dwThreadId = GetCurrentThreadId();
    
    HANDLE hThread1 = CreateThread(NULL,0, Thread1, &mInfo, NULL, NULL);
    printf("SomeThing %s
", Info->thing);

//主线程实现消息检测循环，当接收退出信息退出循环
    while(1)
    {
        PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
        if(msg.message == WM_QUIT)
        {
            printf("
Get message(Quit) from Thread1

");
            CloseHandle(hThread1);
            break;
        }
    }
    printf("Thread Over!
");
    return 0;
}
//子线程
DWORD  WINAPI Thread1(LPVOID lpParam)
{
    info* Info = (info*)lpParam;
    printf("
	Thread1 Start!!!!!
");
    printf("	This ThreadID(%d) is MainThreadID!!!!!
", Info->dwThreadId);
    printf("	Thread1ID %d
", GetCurrentThreadId());
    int ret = PostThreadMessage(Info->dwThreadId, WM_QUIT, NULL, NULL);
    if(ret == ERROR_INVALID_THREAD_ID)
        printf("	postthreadmessage Fail!!!!!
");
    else
        printf("	ret: 0x%08x
", ret);
    return 0;
}