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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Constant used to receive the set of currently pending events in |
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5 | * @ingroup ClassicEventSet Event Set |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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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.com/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/event.h> |
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22 | #include <rtems/rtems/tasks.h> |
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23 | |
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24 | rtems_status_code rtems_event_receive( |
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25 | rtems_event_set event_in, |
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26 | rtems_option option_set, |
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27 | rtems_interval ticks, |
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28 | rtems_event_set *event_out |
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29 | ) |
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30 | { |
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31 | rtems_status_code sc; |
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32 | |
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33 | if ( event_out != NULL ) { |
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34 | Thread_Control *executing = _Thread_Executing; |
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35 | RTEMS_API_Control *api = executing->API_Extensions[ THREAD_API_RTEMS ]; |
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36 | Event_Control *event = &api->Event; |
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37 | |
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38 | if ( !_Event_sets_Is_empty( event_in ) ) { |
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39 | _Thread_Disable_dispatch(); |
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40 | _Event_Seize( |
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41 | event_in, |
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42 | option_set, |
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43 | ticks, |
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44 | event_out, |
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45 | executing, |
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46 | event, |
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47 | &_Event_Sync_state, |
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48 | STATES_WAITING_FOR_EVENT |
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49 | ); |
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50 | _Thread_Enable_dispatch(); |
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51 | |
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52 | sc = executing->Wait.return_code; |
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53 | } else { |
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54 | *event_out = event->pending_events; |
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55 | sc = RTEMS_SUCCESSFUL; |
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56 | } |
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57 | } else { |
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58 | sc = RTEMS_INVALID_ADDRESS; |
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59 | } |
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60 | |
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61 | return sc; |
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62 | } |
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