1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Message Queue Receive |
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5 | * @ingroup ClassicMessageQueue |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2014. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/rtems/messageimpl.h> |
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22 | #include <rtems/rtems/optionsimpl.h> |
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23 | |
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24 | THREAD_QUEUE_OBJECT_ASSERT( Message_queue_Control, message_queue.Wait_queue ); |
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25 | |
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26 | rtems_status_code rtems_message_queue_receive( |
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27 | rtems_id id, |
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28 | void *buffer, |
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29 | size_t *size, |
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30 | rtems_option option_set, |
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31 | rtems_interval timeout |
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32 | ) |
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33 | { |
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34 | Message_queue_Control *the_message_queue; |
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35 | ISR_lock_Context lock_context; |
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36 | Thread_Control *executing; |
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37 | |
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38 | if ( buffer == NULL ) { |
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39 | return RTEMS_INVALID_ADDRESS; |
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40 | } |
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41 | |
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42 | if ( size == NULL ) { |
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43 | return RTEMS_INVALID_ADDRESS; |
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44 | } |
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45 | |
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46 | the_message_queue = _Message_queue_Get( id, &lock_context ); |
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47 | |
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48 | if ( the_message_queue == NULL ) { |
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49 | #if defined(RTEMS_MULTIPROCESSING) |
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50 | return _Message_queue_MP_Receive( id, buffer, size, option_set, timeout ); |
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51 | #else |
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52 | return RTEMS_INVALID_ID; |
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53 | #endif |
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54 | } |
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55 | |
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56 | _CORE_message_queue_Acquire_critical( |
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57 | &the_message_queue->message_queue, |
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58 | &lock_context |
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59 | ); |
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60 | |
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61 | executing = _Thread_Executing; |
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62 | _CORE_message_queue_Seize( |
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63 | &the_message_queue->message_queue, |
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64 | executing, |
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65 | buffer, |
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66 | size, |
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67 | !_Options_Is_no_wait( option_set ), |
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68 | timeout, |
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69 | &lock_context |
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70 | ); |
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71 | return _Message_queue_Translate_core_message_queue_return_code( |
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72 | executing->Wait.return_code |
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73 | ); |
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74 | } |
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