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 | |
---|
41 | void _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.return_argument = seized_events; |
---|
68 | |
---|
69 | _ISR_Flash( level ); |
---|
70 | |
---|
71 | if ( !_Watchdog_Is_active( &the_thread->Timer ) ) { |
---|
72 | _ISR_Enable( level ); |
---|
73 | _Thread_Unblock( the_thread ); |
---|
74 | } |
---|
75 | else { |
---|
76 | _Watchdog_Deactivate( &the_thread->Timer ); |
---|
77 | _ISR_Enable( level ); |
---|
78 | (void) _Watchdog_Remove( &the_thread->Timer ); |
---|
79 | _Thread_Unblock( the_thread ); |
---|
80 | } |
---|
81 | return; |
---|
82 | } |
---|
83 | } |
---|
84 | |
---|
85 | switch ( _Event_Sync_state ) { |
---|
86 | case EVENT_SYNC_SYNCHRONIZED: |
---|
87 | case EVENT_SYNC_SATISFIED: |
---|
88 | break; |
---|
89 | |
---|
90 | case EVENT_SYNC_NOTHING_HAPPENED: |
---|
91 | case EVENT_SYNC_TIMEOUT: |
---|
92 | if ( !_Thread_Is_executing( the_thread ) ) |
---|
93 | break; |
---|
94 | |
---|
95 | if ( seized_events == event_condition || _Options_Is_any(option_set) ) { |
---|
96 | api->pending_events = |
---|
97 | _Event_sets_Clear( pending_events,seized_events ); |
---|
98 | *(rtems_event_set *)the_thread->Wait.return_argument = seized_events; |
---|
99 | _Event_Sync_state = EVENT_SYNC_SATISFIED; |
---|
100 | } |
---|
101 | break; |
---|
102 | } |
---|
103 | } |
---|
104 | _ISR_Enable( level ); |
---|
105 | } |
---|