54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
#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)
|
|
|
|
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) */
|