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view src/g23m-fad/tcpip/rnet/rnet_rt/rnet_rt_api_getbufsize.c @ 159:e8853af07f45
configure-tms470.sh: j100 target in m0-to-bin selection
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 17 Mar 2019 07:22:30 +0000 |
parents | d393cd9bb723 |
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/** * @file rnet_rt_api_getbufsize.c * * RNET_RT API * * @author Regis Feneon * @version 0.1 */ /* * $Id: rnet_rt_api_getbufsize.c,v 1.3 2002/10/30 15:23:34 rf Exp $ * $Name: ti_20021030 $ * * History: * * Date Author Modification * -------------------------------------------------- * 3/22/2002 Regis Feneon Create * * (C) Copyright 2002 by TI, All Rights Reserved * */ #include "rnet_cfg.h" #ifdef RNET_CFG_REAL_TRANSPORT #include "rnet_rt_i.h" #include "rnet_rt_env.h" /** * Use to determine the amount of data pending in the network's input buffer * that can be read from the connection ID. * * If desc is stream oriented (TCP), returns the amount of data that can be read * in a single call to the rnet_recv function; this might not be the same as the * total amount of data queued on the socket. * If desc is message oriented (UDP), returns the size of the first datagram * (message) queued on the socket. * * Use the socket option SO_NREAD. * * @param desc Connection identifier [IN]. * @param size_p Pointer to an unsigned int in which the result is stored [OUT]. * @return RNET_NOT_INITIALIZED NET subsystem not initialized (internal error). * RNET_INTERNAL_ERR Network subsystem failed. * RNET_INVALID_PARAMETER The connection ID is invalid. * RNET_NOT_READY Still processing a callback function. * RNET_OK Value successfully get. */ T_RNET_RET rnet_rt_get_buff_size (T_RNET_DESC * desc, UINT32 * size_p) { int err, len, nread; len = sizeof( nread); /* get number of bytes in receive buffer */ rvf_lock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); err = ngSAIOGetOption( (NGsock *) desc, NG_IOCTL_SOCKET, NG_SO_NREAD, &nread, &len); rvf_unlock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); if( err == NG_EOK) { *size_p = nread; return( RNET_OK); } return( rnet_rt_ngip_error( err)); } #endif /* ifdef RNET_CFG_REAL_TRANSPORT */