1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreThreadQueue
*
* @brief This source file contains the implementation of
* _Thread_queue_Flush_default_filter(),
* _Thread_queue_Flush_status_object_was_deleted(),
* _Thread_queue_Flush_status_unavailable(), and
* _Thread_queue_Flush_critical().
*/
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/threadimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/status.h>
Thread_Control *_Thread_queue_Flush_default_filter(
Thread_Control *the_thread,
Thread_queue_Queue *queue,
Thread_queue_Context *queue_context
)
{
(void) queue;
(void) queue_context;
return the_thread;
}
Thread_Control *_Thread_queue_Flush_status_object_was_deleted(
Thread_Control *the_thread,
Thread_queue_Queue *queue,
Thread_queue_Context *queue_context
)
{
the_thread->Wait.return_code = STATUS_OBJECT_WAS_DELETED;
(void) queue;
(void) queue_context;
return the_thread;
}
Thread_Control *_Thread_queue_Flush_status_unavailable(
Thread_Control *the_thread,
Thread_queue_Queue *queue,
Thread_queue_Context *queue_context
)
{
the_thread->Wait.return_code = STATUS_UNAVAILABLE;
(void) queue;
(void) queue_context;
return the_thread;
}
size_t _Thread_queue_Flush_critical(
Thread_queue_Queue *queue,
const Thread_queue_Operations *operations,
Thread_queue_Flush_filter filter,
Thread_queue_Context *queue_context
)
{
size_t flushed;
size_t priority_updates;
Chain_Control unblock;
Chain_Node *node;
Chain_Node *tail;
flushed = 0;
priority_updates = 0;
_Chain_Initialize_empty( &unblock );
while ( true ) {
Thread_queue_Heads *heads;
Thread_Control *first;
bool do_unblock;
heads = queue->heads;
if ( heads == NULL ) {
break;
}
first = ( *operations->first )( heads );
first = ( *filter )( first, queue, queue_context );
if ( first == NULL ) {
break;
}
/*
* We do not have enough space in the queue context to collect all priority
* updates, so clear it each time and accumulate the priority updates.
*/
_Thread_queue_Context_clear_priority_updates( queue_context );
do_unblock = _Thread_queue_Extract_locked(
queue,
operations,
first,
queue_context
);
if ( do_unblock ) {
Scheduler_Node *scheduler_node;
scheduler_node = _Thread_Scheduler_get_home_node( first );
_Chain_Append_unprotected(
&unblock,
&scheduler_node->Wait.Priority.Node.Node.Chain
);
}
priority_updates +=
_Thread_queue_Context_get_priority_updates( queue_context );
++flushed;
}
node = _Chain_First( &unblock );
tail = _Chain_Tail( &unblock );
if ( node != tail ) {
Per_CPU_Control *cpu_self;
cpu_self = _Thread_queue_Dispatch_disable( queue_context );
_Thread_queue_Queue_release( queue, &queue_context->Lock_context.Lock_context );
do {
Scheduler_Node *scheduler_node;
Thread_Control *the_thread;
Chain_Node *next;
next = _Chain_Next( node );
scheduler_node = SCHEDULER_NODE_OF_WAIT_PRIORITY_NODE( node );
the_thread = _Scheduler_Node_get_owner( scheduler_node );
_Thread_Remove_timer_and_unblock( the_thread, queue );
node = next;
} while ( node != tail );
if ( priority_updates != 0 ) {
Thread_Control *owner;
ISR_lock_Context lock_context;
owner = queue->owner;
_Assert( owner != NULL );
_Thread_State_acquire( owner, &lock_context );
_Scheduler_Update_priority( owner );
_Thread_State_release( owner, &lock_context );
}
_Thread_Dispatch_enable( cpu_self );
} else {
_Thread_queue_Queue_release( queue, &queue_context->Lock_context.Lock_context );
}
return flushed;
}
|
