blob: c15f7e6ad28f71f42048165e7695129c212882e1 (
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
74
75
|
/**
* @file
*
* @brief Locking and Unlocking a Mutex
* @ingroup POSIXAPI
*/
/*
* COPYRIGHT (c) 1989-2007.
* 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/posix/muteximpl.h>
#include <rtems/posix/posixapi.h>
/*
* 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93
*
* NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29
*/
int pthread_mutex_unlock(
pthread_mutex_t *mutex
)
{
POSIX_Mutex_Control *the_mutex;
Thread_queue_Context queue_context;
Thread_Control *executing;
Status_Control status;
the_mutex = _POSIX_Mutex_Get( mutex, &queue_context );
if ( the_mutex == NULL ) {
return EINVAL;
}
executing = _Thread_Executing;
switch ( the_mutex->protocol ) {
case POSIX_MUTEX_PRIORITY_CEILING:
status = _CORE_ceiling_mutex_Surrender(
&the_mutex->Mutex,
executing,
&queue_context
);
break;
case POSIX_MUTEX_NO_PROTOCOL:
status = _CORE_recursive_mutex_Surrender(
&the_mutex->Mutex.Recursive,
POSIX_MUTEX_NO_PROTOCOL_TQ_OPERATIONS,
executing,
&queue_context
);
break;
default:
_Assert( the_mutex->protocol == POSIX_MUTEX_PRIORITY_INHERIT );
status = _CORE_recursive_mutex_Surrender(
&the_mutex->Mutex.Recursive,
CORE_MUTEX_TQ_PRIORITY_INHERIT_OPERATIONS,
executing,
&queue_context
);
break;
}
return _POSIX_Get_error( status );
}
|
