GetQueuedCompletionStatus正确返回但是GetLastError返回87 ERROR_INVALID_PARAMETER

Question

工作者线程代码如下，一旦收到一个包之后，GetQueuedCompletionStatus就会一直返回1。第一次是正确的数据，之后一直都是长度为0的数据DWORD _stdcall WorkThread(LPVOID voidParam)
{
struct ThreadParam *param = (struct ThreadParam *)voidParam; HANDLE myIocp = param->iocpModule->myIocp;
DWORD bytesLen = 0;
ULONG_PTR key;
OVERLAPPED *overLapped;
DWORD err = 0;
while (1)
{
BOOL result = GetQueuedCompletionStatus(myIocp, &bytesLen, &key, &overLapped, 3600000);
err = GetLastError();
if (result)
{
Socket_Context *sc = (Socket_Context *)key;
Io_Context *ic = CONTAINING_RECORD(overLapped, Io_Context, overLapped);
if (ic->operationType == RECV_POSTED)
wprintf(L"OK!");
param->iocpModule->PostRecv(ic);
}
else
{
if (overLapped != NULL)
{
wprintf(L"GetQueuedCompletionSta tus error, err=%d", err);
}
else
{
if (err == WAIT_TIMEOUT)
{
wprintf(L"GetQueuedCompletionStatus time out");
}
else
{
wprintf(L"GetQueuedCompletionStatus error, err=%d", err);
}
}
}
}
return 0;
}

Answer 1

DWORD _stdcall WorkThread(LPVOID voidParam)
{
    struct ThreadParam *param = (struct ThreadParam *)voidParam;
 
    HANDLE myIocp = param->iocpModule->myIocp;
    DWORD bytesLen = 0;
    ULONG_PTR key;
    OVERLAPPED *overLapped;
    DWORD err = 0;
    while (1)
    {
        BOOL result = GetQueuedCompletionStatus(myIocp, &bytesLen, &key, &overLapped, 3600000);
        err = GetLastError();
        if (result)
        {
            Socket_Context *sc = (Socket_Context *)key;
            Io_Context *ic = CONTAINING_RECORD(overLapped, Io_Context, overLapped);
            if (ic->operationType == RECV_POSTED)
                wprintf(L"OK!");
            param->iocpModule->PostRecv(ic);
        }
        else
        {
            if (overLapped != NULL)
            {
                wprintf(L"GetQueuedCompletionSta tus error, err=%d", err);
            }
            else
            {
                if (err == WAIT_TIMEOUT)
                {
                    wprintf(L"GetQueuedCompletionStatus time out");
                }
                else
                {
                    wprintf(L"GetQueuedCompletionStatus error, err=%d", err);
                }
            }
        }
    }
    return 0;
}红色那个值不能是随意值，该值是创建完成端口时，指定的那个值