source: rtems/c/src/exec/rtems/src/event.c @ 5e9b32b

4.104.114.84.95
Last change on this file since 5e9b32b was 5e9b32b, checked in by Joel Sherrill <joel.sherrill@…>, on 09/26/95 at 19:27:15

posix support initially added

  • Property mode set to 100644
File size: 2.7 KB
Line 
1/*
2 *  Event Manager
3 *
4 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
5 *  On-Line Applications Research Corporation (OAR).
6 *  All rights assigned to U.S. Government, 1994.
7 *
8 *  This material may be reproduced by or for the U.S. Government pursuant
9 *  to the copyright license under the clause at DFARS 252.227-7013.  This
10 *  notice must appear in all copies of this file and its derivatives.
11 *
12 *  $Id$
13 */
14
15#include <rtems/system.h>
16#include <rtems/rtems/status.h>
17#include <rtems/rtems/event.h>
18#include <rtems/score/isr.h>
19#include <rtems/score/object.h>
20#include <rtems/rtems/options.h>
21#include <rtems/score/states.h>
22#include <rtems/score/thread.h>
23#include <rtems/rtems/tasks.h>
24
25/*PAGE
26 *
27 *  rtems_event_send
28 *
29 *  This directive allows a thread send an event set to another thread.
30 *
31 *  Input parameters:
32 *    id    - thread id
33 *    event - event set
34 *
35 *  Output parameters:
36 *    RTEMS_SUCCESSFUL - if successful
37 *    error code - if unsuccessful
38 */
39
40rtems_status_code rtems_event_send(
41  Objects_Id         id,
42  rtems_event_set event_in
43)
44{
45  register Thread_Control *the_thread;
46  Objects_Locations        location;
47  RTEMS_API_Control       *api;
48
49  the_thread = _Thread_Get( id, &location );
50  switch ( location ) {
51    case OBJECTS_ERROR:
52      return RTEMS_INVALID_ID;
53    case OBJECTS_REMOTE:
54      return(
55        _Event_MP_Send_request_packet(
56          EVENT_MP_SEND_REQUEST,
57          id,
58          event_in
59        )
60      );
61    case OBJECTS_LOCAL:
62      api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
63      _Event_sets_Post( event_in, &api->pending_events );
64      _Event_Surrender( the_thread );
65      _Thread_Enable_dispatch();
66      return RTEMS_SUCCESSFUL;
67  }
68
69  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
70}
71
72/*PAGE
73 *
74 *  rtems_event_receive
75 *
76 *  This directive allows a thread to receive a set of events.
77 *
78 *  Input parameters:
79 *    event_in   - input event condition
80 *    option_set - options
81 *    ticks      - number of ticks to wait (0 means wait forever)
82 *    event_out  - pointer to output event set
83 *
84 *  Output parameters:
85 *    event out         - event set
86 *    RTEMS_SUCCESSFUL - if successful
87 *    error code        - if unsuccessful
88 */
89
90rtems_status_code rtems_event_receive(
91  rtems_event_set  event_in,
92  rtems_option     option_set,
93  rtems_interval   ticks,
94  rtems_event_set *event_out
95)
96{
97  RTEMS_API_Control       *api;
98
99  api = _Thread_Executing->API_Extensions[ THREAD_API_RTEMS ];
100
101  if ( _Event_sets_Is_empty( event_in ) ) {
102    *event_out = api->pending_events;
103    return RTEMS_SUCCESSFUL;
104  }
105
106  _Thread_Disable_dispatch();
107  _Event_Seize( event_in, option_set, ticks, event_out );
108  _Thread_Enable_dispatch();
109  return( _Thread_Executing->Wait.return_code );
110}
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