source: rtems/c/src/exec/rtems/src/eventsurrender.c @ bfbc4d3

4.104.114.84.95
Last change on this file since bfbc4d3 was bfbc4d3, checked in by Joel Sherrill <joel.sherrill@…>, on 03/29/01 at 15:51:08

2001-03-26 Zoltan Kocsi <zoltan@…>

  • src/eventsurrender.c: Clear event condition when task is unblocked. This makes sure that subsequent event send thinks the task is still blocked and overwrites the initial events received.
  • Property mode set to 100644
File size: 2.8 KB
Line 
1/*
2 *  Event Manager
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.OARcorp.com/rtems/license.html.
10 *
11 *  $Id$
12 */
13
14#include <rtems/system.h>
15#include <rtems/rtems/status.h>
16#include <rtems/rtems/event.h>
17#include <rtems/score/isr.h>
18#include <rtems/score/object.h>
19#include <rtems/rtems/options.h>
20#include <rtems/score/states.h>
21#include <rtems/score/thread.h>
22#include <rtems/rtems/tasks.h>
23
24/*PAGE
25 *
26 *  _Event_Surrender
27 *
28 *  This routines remove a thread from the specified threadq.
29 *
30 *  Input parameters:
31 *    the_thread - pointer to thread to be dequeued
32 *
33 *  Output parameters: NONE
34 *
35 *  INTERRUPT LATENCY:
36 *    before flash
37 *    after flash
38 *    check sync
39 */
40
41void _Event_Surrender(
42  Thread_Control *the_thread
43)
44{
45  ISR_Level           level;
46  rtems_event_set     pending_events;
47  rtems_event_set     event_condition;
48  rtems_event_set     seized_events;
49  rtems_option        option_set;
50  RTEMS_API_Control  *api;
51
52  api = the_thread->API_Extensions[ THREAD_API_RTEMS ];
53
54  option_set = (rtems_option) the_thread->Wait.option;
55
56  _ISR_Disable( level );
57  pending_events  = api->pending_events;
58  event_condition = (rtems_event_set) the_thread->Wait.count;
59
60  seized_events = _Event_sets_Get( pending_events, event_condition );
61
62  if ( !_Event_sets_Is_empty( seized_events ) ) {
63    if ( _States_Is_waiting_for_event( the_thread->current_state ) ) {
64      if ( seized_events == event_condition || _Options_Is_any( option_set ) ) {
65        api->pending_events =
66           _Event_sets_Clear( pending_events, seized_events );
67        (rtems_event_set) the_thread->Wait.count = 0;
68        *(rtems_event_set *)the_thread->Wait.return_argument = seized_events;
69
70        _ISR_Flash( level );
71
72        if ( !_Watchdog_Is_active( &the_thread->Timer ) ) {
73          _ISR_Enable( level );
74          _Thread_Unblock( the_thread );
75        }
76        else {
77          _Watchdog_Deactivate( &the_thread->Timer );
78          _ISR_Enable( level );
79          (void) _Watchdog_Remove( &the_thread->Timer );
80          _Thread_Unblock( the_thread );
81        }
82        return;
83      }
84    }
85
86    switch ( _Event_Sync_state ) {
87      case EVENT_SYNC_SYNCHRONIZED:
88      case EVENT_SYNC_SATISFIED:
89        break;
90 
91      case EVENT_SYNC_NOTHING_HAPPENED:
92      case EVENT_SYNC_TIMEOUT:
93        if ( !_Thread_Is_executing( the_thread ) )
94          break;
95
96        if ( seized_events == event_condition || _Options_Is_any(option_set) ) {
97          api->pending_events =
98               _Event_sets_Clear( pending_events,seized_events );
99          *(rtems_event_set *)the_thread->Wait.return_argument = seized_events;
100          _Event_Sync_state = EVENT_SYNC_SATISFIED;
101        }
102        break;
103    }
104  }
105  _ISR_Enable( level );
106}
Note: See TracBrowser for help on using the repository browser.