FreeCalypso > hg > fc-tourmaline
diff src/g23m-fad/tcpip/rnet/rnet_rt/rnet_rt_api_getbufsize.c @ 1:fa8dc04885d8
src/g23m-*: import from Magnetite
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 16 Oct 2020 06:25:50 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/g23m-fad/tcpip/rnet/rnet_rt/rnet_rt_api_getbufsize.c Fri Oct 16 06:25:50 2020 +0000 @@ -0,0 +1,73 @@ +/** + * @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 */ +