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