1 | /* |
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2 | * Event 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.rtems.com/license/LICENSE. |
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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 <rtems/system.h> |
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19 | #include <rtems/rtems/status.h> |
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20 | #include <rtems/rtems/event.h> |
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21 | #include <rtems/score/isr.h> |
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22 | #include <rtems/score/object.h> |
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23 | #include <rtems/rtems/options.h> |
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24 | #include <rtems/score/states.h> |
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25 | #include <rtems/score/thread.h> |
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26 | #include <rtems/rtems/tasks.h> |
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27 | |
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28 | /*PAGE |
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29 | * |
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30 | * rtems_event_receive |
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31 | * |
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32 | * This directive allows a thread to receive a set of events. |
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33 | * |
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34 | * Input parameters: |
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35 | * event_in - input event condition |
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36 | * option_set - options |
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37 | * ticks - number of ticks to wait (0 means wait forever) |
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38 | * event_out - pointer to output event set |
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39 | * |
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40 | * Output parameters: |
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41 | * event out - event set |
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42 | * RTEMS_SUCCESSFUL - if successful |
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43 | * error code - if unsuccessful |
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44 | */ |
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45 | |
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46 | rtems_status_code rtems_event_receive( |
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47 | rtems_event_set event_in, |
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48 | rtems_option option_set, |
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49 | rtems_interval ticks, |
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50 | rtems_event_set *event_out |
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51 | ) |
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52 | { |
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53 | RTEMS_API_Control *api; |
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54 | |
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55 | if ( !event_out ) |
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56 | return RTEMS_INVALID_ADDRESS; |
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57 | |
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58 | api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ]; |
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59 | |
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60 | if ( _Event_sets_Is_empty( event_in ) ) { |
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61 | *event_out = api->pending_events; |
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62 | return RTEMS_SUCCESSFUL; |
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63 | } |
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64 | |
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65 | _Thread_Disable_dispatch(); |
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66 | _Event_Seize( event_in, option_set, ticks, event_out ); |
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67 | _Thread_Enable_dispatch(); |
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68 | return( _Thread_Executing->Wait.return_code ); |
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69 | } |
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