blob: 6ee65f53cc2373893cc0a4c6572987b201474f35 (
plain) (
blame)
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
|
/**
* @file
*
* @brief Changes the Priority of a Thread
*
* @ingroup ScoreThread
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/threadimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/threadqimpl.h>
void _Thread_Change_priority(
Thread_Control *the_thread,
Priority_Control new_priority,
bool prepend_it
)
{
ISR_Level level;
_ISR_Disable( level );
/*
* Do not bother recomputing all the priority related information if
* we are not REALLY changing priority.
*/
if ( the_thread->current_priority != new_priority ) {
uint32_t my_generation = the_thread->priority_generation + 1;
the_thread->current_priority = new_priority;
the_thread->priority_generation = my_generation;
_Thread_queue_Requeue( the_thread->Wait.queue, the_thread );
_ISR_Flash( level );
if ( the_thread->priority_generation == my_generation ) {
if ( _States_Is_ready( the_thread->current_state ) ) {
_Scheduler_Change_priority(
the_thread,
new_priority,
prepend_it
);
} else {
_Scheduler_Update_priority( the_thread, new_priority );
}
}
}
_ISR_Enable( level );
}
|
