FreeCalypso > hg > fc-tourmaline
comparison 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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0:4e78acac3d88 | 1:fa8dc04885d8 |
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1 /** | |
2 * @file rnet_rt_api_getbufsize.c | |
3 * | |
4 * RNET_RT API | |
5 * | |
6 * @author Regis Feneon | |
7 * @version 0.1 | |
8 */ | |
9 | |
10 /* | |
11 * $Id: rnet_rt_api_getbufsize.c,v 1.3 2002/10/30 15:23:34 rf Exp $ | |
12 * $Name: ti_20021030 $ | |
13 * | |
14 * History: | |
15 * | |
16 * Date Author Modification | |
17 * -------------------------------------------------- | |
18 * 3/22/2002 Regis Feneon Create | |
19 * | |
20 * (C) Copyright 2002 by TI, All Rights Reserved | |
21 * | |
22 */ | |
23 | |
24 #include "rnet_cfg.h" | |
25 #ifdef RNET_CFG_REAL_TRANSPORT | |
26 | |
27 #include "rnet_rt_i.h" | |
28 #include "rnet_rt_env.h" | |
29 | |
30 /** | |
31 * Use to determine the amount of data pending in the network's input buffer | |
32 * that can be read from the connection ID. | |
33 * | |
34 * If desc is stream oriented (TCP), returns the amount of data that can be read | |
35 * in a single call to the rnet_recv function; this might not be the same as the | |
36 * total amount of data queued on the socket. | |
37 * If desc is message oriented (UDP), returns the size of the first datagram | |
38 * (message) queued on the socket. | |
39 * | |
40 * Use the socket option SO_NREAD. | |
41 * | |
42 * @param desc Connection identifier [IN]. | |
43 * @param size_p Pointer to an unsigned int in which the result is stored [OUT]. | |
44 * @return RNET_NOT_INITIALIZED NET subsystem not initialized (internal error). | |
45 * RNET_INTERNAL_ERR Network subsystem failed. | |
46 * RNET_INVALID_PARAMETER The connection ID is invalid. | |
47 * RNET_NOT_READY Still processing a callback function. | |
48 * RNET_OK Value successfully get. | |
49 */ | |
50 | |
51 T_RNET_RET rnet_rt_get_buff_size (T_RNET_DESC * desc, | |
52 UINT32 * size_p) | |
53 { | |
54 int err, len, nread; | |
55 | |
56 len = sizeof( nread); | |
57 | |
58 /* get number of bytes in receive buffer */ | |
59 rvf_lock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); | |
60 err = ngSAIOGetOption( (NGsock *) desc, NG_IOCTL_SOCKET, NG_SO_NREAD, | |
61 &nread, &len); | |
62 rvf_unlock_mutex( &rnet_rt_env_ctrl_blk_p->mutex); | |
63 | |
64 if( err == NG_EOK) { | |
65 *size_p = nread; | |
66 return( RNET_OK); | |
67 } | |
68 | |
69 return( rnet_rt_ngip_error( err)); | |
70 } | |
71 | |
72 #endif /* ifdef RNET_CFG_REAL_TRANSPORT */ | |
73 |