blob: bc131e2e81fc9c8b25a8ef8ee9025c03fbcda9be (
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
76
77
|
/**
* @file
*
* @brief POSIX Function Initializes a Spinlock Instance
* @ingroup POSIXAPI
*/
/*
* POSIX Spinlock Manager -- Initialize a Spinlock Instance
*
* COPYRIGHT (c) 1989-2006.
* 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 <pthread.h>
#include <errno.h>
#include <rtems/system.h>
#include <rtems/posix/spinlockimpl.h>
/*
* pthread_spinlock_init
*
* This directive creates a spinlock. A spinlock id is returned.
*
* Input parameters:
* spinlock - pointer to spinlock id
* pshared - is this spinlock shared between processes
*
* Output parameters:
* spinlock - spinlock id
* 0 - if successful
* error code - if unsuccessful
*/
int pthread_spin_init(
pthread_spinlock_t *spinlock,
int pshared
)
{
POSIX_Spinlock_Control *the_spinlock;
if ( !spinlock )
return EINVAL;
switch ( pshared ) {
case PTHREAD_PROCESS_PRIVATE: /* only supported values */
break;
case PTHREAD_PROCESS_SHARED:
default:
return EINVAL;
}
the_spinlock = _POSIX_Spinlock_Allocate();
if ( !the_spinlock ) {
_Objects_Allocator_unlock();
return EAGAIN;
}
_CORE_spinlock_Initialize( &the_spinlock->Spinlock );
_Objects_Open_u32( &_POSIX_Spinlock_Information, &the_spinlock->Object, 0 );
*spinlock = the_spinlock->Object.id;
_Objects_Allocator_unlock();
return 0;
}
|
