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
|
/**
* @file
*
* @brief RTEMS Delete Semaphore
* @ingroup ClassicSem
*/
/*
* 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/statusimpl.h>
rtems_status_code rtems_semaphore_delete(
rtems_id id
)
{
Semaphore_Control *the_semaphore;
Thread_queue_Context queue_context;
Status_Control status;
_Objects_Allocator_lock();
the_semaphore = _Semaphore_Get( id, &queue_context );
if ( the_semaphore == NULL ) {
_Objects_Allocator_unlock();
#if defined(RTEMS_MULTIPROCESSING)
if ( _Semaphore_MP_Is_remote( id ) ) {
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
}
#endif
return RTEMS_INVALID_ID;
}
_Thread_queue_Acquire_critical(
&the_semaphore->Core_control.Wait_queue,
&queue_context.Lock_context
);
switch ( the_semaphore->variant ) {
case SEMAPHORE_VARIANT_MUTEX:
if ( _CORE_mutex_Is_locked( &the_semaphore->Core_control.mutex ) ) {
status = STATUS_RESOURCE_IN_USE;
} else {
status = STATUS_SUCCESSFUL;
}
break;
#if defined(RTEMS_SMP)
case SEMAPHORE_VARIANT_MRSP:
status = _MRSP_Can_destroy( &the_semaphore->Core_control.mrsp );
break;
#endif
default:
_Assert(
the_semaphore->variant == SEMAPHORE_VARIANT_SIMPLE_BINARY
|| the_semaphore->variant == SEMAPHORE_VARIANT_COUNTING
);
status = STATUS_SUCCESSFUL;
break;
}
if ( status != STATUS_SUCCESSFUL ) {
_Thread_queue_Release(
&the_semaphore->Core_control.Wait_queue,
&queue_context.Lock_context
);
_Objects_Allocator_unlock();
return _Status_Get( status );
}
_Objects_Close( &_Semaphore_Information, &the_semaphore->Object );
switch ( the_semaphore->variant ) {
#if defined(RTEMS_SMP)
case SEMAPHORE_VARIANT_MRSP:
_MRSP_Destroy( &the_semaphore->Core_control.mrsp, &queue_context );
break;
#endif
default:
_Assert(
the_semaphore->variant == SEMAPHORE_VARIANT_MUTEX
|| the_semaphore->variant == SEMAPHORE_VARIANT_SIMPLE_BINARY
|| the_semaphore->variant == SEMAPHORE_VARIANT_COUNTING
);
_Thread_queue_Flush_critical(
&the_semaphore->Core_control.Wait_queue.Queue,
_Semaphore_Get_operations( the_semaphore ),
_Thread_queue_Flush_status_object_was_deleted,
&queue_context
);
_Thread_queue_Destroy( &the_semaphore->Core_control.Wait_queue );
break;
}
#if defined(RTEMS_MULTIPROCESSING)
if ( the_semaphore->is_global ) {
_Objects_MP_Close( &_Semaphore_Information, id );
_Semaphore_MP_Send_process_packet(
SEMAPHORE_MP_ANNOUNCE_DELETE,
id,
0, /* Not used */
0 /* Not used */
);
}
#endif
_Semaphore_Free( the_semaphore );
_Objects_Allocator_unlock();
return RTEMS_SUCCESSFUL;
}
|
