Method Select

plugins/dm.gameconnection/clsocket/SimpleSocket.cpp:1129–1188

------------------------------------------------------------------------------ Select() ------------------------------------------------------------------------------

//
//------------------------------------------------------------------------------
bool CSimpleSocket::Select(int32 nTimeoutSec, int32 nTimeoutUSec)
{
    bool            bRetVal = false;
    struct timeval *pTimeout = NULL;
    struct timeval  timeout;
    int32           nNumDescriptors = -1;
    int32           nError = 0;

    FD_ZERO(&m_errorFds);
    FD_ZERO(&m_readFds);
    FD_ZERO(&m_writeFds);
    FD_SET(m_socket, &m_errorFds);
    FD_SET(m_socket, &m_readFds);
    FD_SET(m_socket, &m_writeFds);

    //---------------------------------------------------------------------
    // If timeout has been specified then set value, otherwise set timeout
    // to NULL which will block until a descriptor is ready for read/write
    // or an error has occurred.
    //---------------------------------------------------------------------
    if ((nTimeoutSec > 0) || (nTimeoutUSec > 0))
    {
        timeout.tv_sec = nTimeoutSec;
        timeout.tv_usec = nTimeoutUSec;
        pTimeout = &timeout;
    }

    nNumDescriptors = SELECT(m_socket+1, &m_readFds, &m_writeFds, &m_errorFds, pTimeout);
//    nNumDescriptors = SELECT(m_socket+1, &m_readFds, NULL, NULL, pTimeout);

    //----------------------------------------------------------------------
    // Handle timeout
    //----------------------------------------------------------------------
    if (nNumDescriptors == 0)
    {
        SetSocketError(CSimpleSocket::SocketTimedout);
    }
    //----------------------------------------------------------------------
    // If a file descriptor (read/write) is set then check the
    // socket error (SO_ERROR) to see if there is a pending error.
    //----------------------------------------------------------------------
    else if ((FD_ISSET(m_socket, &m_readFds)) || (FD_ISSET(m_socket, &m_writeFds)))
    {
        int32 nLen = sizeof(nError);

        if (GETSOCKOPT(m_socket, SOL_SOCKET, SO_ERROR, &nError, &nLen) == 0)
        {
            errno = nError;

            if (nError == 0)
            {
                bRetVal = true;
            }
        }

        TranslateSocketError();
    }