完成端口(IOCP) 也可以这样用~~呵呵~ 用来充当线程之间的数据队列~

// Test32.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <stdlib.h>
#include <windows.h>
#include <process.h>
#include <iostream>

HANDLE m_hCompletionPort;


volatile BOOL m_bShutDown;

struct TESTOVERLAPPED
{
    OVERLAPPED    m_ol;
    CHAR        szData[512];
};


UINT WINAPI IOWorkerThreadProc(LPVOID pParam)
{
    BOOL            bError            = FALSE;
    DWORD            dwIoSize        = 0;
    DWORD            dwCmpKey        = 0;
    LPOVERLAPPED    lpOverlapped    = NULL;
    TESTOVERLAPPED*    pOverlapBuff    = NULL;


    while ( !bError )
    {
        pOverlapBuff        = NULL;
        dwCmpKey = 0;
        // Get a completed IO request.
        BOOL bIORet = GetQueuedCompletionStatus(m_hCompletionPort, &dwIoSize, (LPDWORD) &dwCmpKey, &lpOverlapped, INFINITE);
        // Simulate workload (for debugging, to find possible reordering)
        //Sleep(20);


        // If Something whent wrong..
        if (!bIORet)  
        {
            DWORD dwIOError = GetLastError();
            if(dwIOError != WAIT_TIMEOUT) // It was not an Time out event we wait for ever (INFINITE) 
            {    
    
                    continue;

            }
        }// if (!bIORet) 



        if(bIORet && lpOverlapped && dwCmpKey) 
        {
            pOverlapBuff=CONTAINING_RECORD(lpOverlapped, TESTOVERLAPPED, m_ol);
            if(pOverlapBuff!=NULL)
            {
                //pThis->ProcessIOMessage(pOverlapBuff, dwCmpKey, dwIoSize);
                printf("ThreaId：0x%x %d %s ",GetCurrentThreadId(),dwCmpKey,pOverlapBuff->szData);
            }

            delete pOverlapBuff;
        }    

        if((dwCmpKey == NULL) && (pOverlapBuff == NULL) && m_bShutDown)
        {
            bError = TRUE;
        }
    } 

    printf("Thread dead!");

    return 0xdead;
}




int _tmain(int argc, _TCHAR* argv[])
{
    m_hCompletionPort = CreateIoCompletionPort( INVALID_HANDLE_VALUE, NULL, 0, 0 );

    uintptr_t hThread =_beginthreadex(0,0,IOWorkerThreadProc, 0,0, NULL);
    hThread =_beginthreadex(0,0,IOWorkerThreadProc, 0,0, NULL);
    hThread =_beginthreadex(0,0,IOWorkerThreadProc, 0,0, NULL);

    m_bShutDown = FALSE;

    for(int i = 0; i < 30; i++)
    {
        DWORD dwCmpKey = i;
        TESTOVERLAPPED * pOverlapBuff = new TESTOVERLAPPED;
        memset(pOverlapBuff->szData,0,sizeof(pOverlapBuff->szData));
        sprintf(pOverlapBuff->szData,"CMD ID：%d",i);
        PostQueuedCompletionStatus(m_hCompletionPort, 0, (ULONG_PTR) &dwCmpKey, &pOverlapBuff->m_ol);
    }

    m_bShutDown = TRUE;
    PostQueuedCompletionStatus(m_hCompletionPort,0,0,0);

    getchar();

    return 0;
}