blob: 007914c09acac5b61a8fcf0b6e1c45ba55bc079f (
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
65
66
67
68
69
70
71
72
73
|
/**
* @file
*
* @brief RTEMS Semaphore Release
* @ingroup ClassicSem Semaphores
*
* This file contains the implementation of the Classic API directive
* rtems_semaphore_release().
*/
/*
* 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/rtems/semimpl.h>
#include <rtems/rtems/attrimpl.h>
#include <rtems/rtems/statusimpl.h>
rtems_status_code rtems_semaphore_release( rtems_id id )
{
Semaphore_Control *the_semaphore;
Thread_queue_Context queue_context;
rtems_attribute attribute_set;
Status_Control status;
the_semaphore = _Semaphore_Get(
id,
&queue_context,
_Semaphore_Core_mutex_mp_support
);
if ( the_semaphore == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
return _Semaphore_MP_Release( id );
#else
return RTEMS_INVALID_ID;
#endif
}
attribute_set = the_semaphore->attribute_set;
#if defined(RTEMS_SMP)
if ( _Attributes_Is_multiprocessor_resource_sharing( attribute_set ) ) {
status = _MRSP_Surrender(
&the_semaphore->Core_control.mrsp,
_Thread_Executing,
&queue_context
);
} else
#endif
if ( !_Attributes_Is_counting_semaphore( attribute_set ) ) {
status = _CORE_mutex_Surrender(
&the_semaphore->Core_control.mutex,
&queue_context
);
} else {
status = _CORE_semaphore_Surrender(
&the_semaphore->Core_control.semaphore,
UINT32_MAX,
&queue_context
);
}
return _Status_Get( status );
}
|
