blob: 093dcc6788dbe0309eb380db540da991827e65a4 (
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
|
#ifndef _SPARC64_SEMAPHORE_H
#define _SPARC64_SEMAPHORE_H
/* These are actually reasonable on the V9.
*
* See asm-ppc/semaphore.h for implementation commentary,
* only sparc64 specific issues are commented here.
*/
#ifdef __KERNEL__
#include <asm/atomic.h>
#include <asm/system.h>
#include <linux/wait.h>
#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
wait_queue_head_t wait;
};
#define __SEMAPHORE_INITIALIZER(name, count) \
{ ATOMIC_INIT(count), \
__WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name, 0)
static inline void sema_init (struct semaphore *sem, int val)
{
atomic_set(&sem->count, val);
init_waitqueue_head(&sem->wait);
}
static inline void init_MUTEX (struct semaphore *sem)
{
sema_init(sem, 1);
}
static inline void init_MUTEX_LOCKED (struct semaphore *sem)
{
sema_init(sem, 0);
}
extern void up(struct semaphore *sem);
extern void down(struct semaphore *sem);
extern int down_trylock(struct semaphore *sem);
extern int down_interruptible(struct semaphore *sem);
#endif /* __KERNEL__ */
#endif /* !(_SPARC64_SEMAPHORE_H) */
|
