是否有可能无法获得WSASend呼叫的完成？

WSASend

WSASend

void CSocketServer::Write(
    Socket *pSocket,
    CIOBuffer *pBuffer) const
{
    pSocket->AddRef();

    pBuffer->SetOperation(IO_Write_Completed);
    pBuffer->SetupWrite();
    pBuffer->AddRef();

    DWORD dwFlags = 0;
    DWORD dwSendNumBytes = 0;

    if (SOCKET_ERROR == ::WSASend(
        pSocket->m_socket,
        pBuffer->GetWSABUF(), 
        1, 
        &dwSendNumBytes,
        dwFlags,
        pBuffer, 
        NULL))
    {
        DWORD lastError = ::WSAGetLastError();

        if (ERROR_IO_PENDING != lastError)
        {
            pSocket->OnConnectionError(WriteError, pBuffer, lastError);

            pSocket->WriteCompleted();  // this pending write will never complete...

            pSocket->Release();
            pBuffer->Release();
        }
    }
    // Note: even if WSASend returns SUCCESS an IO Completion Packet is 
    // queued to the IOCP the same as if ERROR_IO_PENDING was returned.
    // Thus we need no special handling for the non error return case.
    // See http://support.microsoft.com/default.aspx?scid=kb;en-us;Q192800
    // for details.
}