1 | /* |
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2 | * ITRON Message Buffer Manager |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <itron.h> |
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19 | |
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20 | #include <rtems/itron/msgbuffer.h> |
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21 | #include <rtems/itron/task.h> |
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22 | |
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23 | /* |
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24 | * trcv_mbf - Receive Message from MessageBuffer with Timeout |
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25 | */ |
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26 | |
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27 | ER trcv_mbf( |
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28 | VP msg, |
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29 | INT *p_msgsz, |
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30 | ID mbfid, |
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31 | TMO tmout |
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32 | ) |
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33 | { |
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34 | ITRON_Message_buffer_Control *the_message_buffer; |
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35 | Objects_Locations location; |
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36 | CORE_message_queue_Status status; |
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37 | boolean wait; |
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38 | Watchdog_Interval interval; |
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39 | |
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40 | interval = 0; |
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41 | if (tmout == TMO_POL) { |
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42 | wait = FALSE; |
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43 | } else { |
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44 | wait = TRUE; |
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45 | if (tmout != TMO_FEVR) |
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46 | interval = TOD_MILLISECONDS_TO_TICKS(tmout); |
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47 | } |
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48 | |
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49 | if (wait && _ITRON_Is_in_non_task_state() ) |
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50 | return E_CTX; |
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51 | |
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52 | if (!p_msgsz || !msg || tmout <= -2) |
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53 | return E_PAR; |
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54 | |
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55 | the_message_buffer = _ITRON_Message_buffer_Get(mbfid, &location); |
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56 | switch (location) { |
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57 | case OBJECTS_REMOTE: |
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58 | case OBJECTS_ERROR: /* Multiprocessing not supported */ |
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59 | return _ITRON_Message_buffer_Clarify_get_id_error(mbfid); |
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60 | |
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61 | case OBJECTS_LOCAL: |
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62 | _CORE_message_queue_Seize( |
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63 | &the_message_buffer->message_queue, |
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64 | the_message_buffer->Object.id, |
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65 | msg, |
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66 | p_msgsz, |
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67 | wait, |
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68 | interval |
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69 | ); |
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70 | _Thread_Enable_dispatch(); |
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71 | status = (CORE_message_queue_Status)_Thread_Executing->Wait.return_code; |
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72 | return |
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73 | _ITRON_Message_buffer_Translate_core_message_buffer_return_code(status); |
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74 | } |
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75 | |
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76 | /* |
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77 | * If multiprocessing were supported, this is where we would announce |
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78 | * the existence of the semaphore to the rest of the system. |
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79 | */ |
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80 | |
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81 | #if defined(RTEMS_MULTIPROCESSING) |
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82 | #endif |
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83 | return E_OK; |
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84 | } |
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