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Define __raw_read_can_lock / __raw_write_can_lock.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2005-02-03 13:34:45 +00:00
parent f638d1971e
commit e3c4807825
1 changed files with 12 additions and 0 deletions
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12
include/asm-mips/spinlock.h
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@ -119,6 +119,18 @@ static inline unsigned int __raw_spin_trylock(raw_spinlock_t *lock)
* read-locks. * read-locks.
*/ */
/*
* read_can_lock - would read_trylock() succeed?
* @lock: the rwlock in question.
*/
#define __raw_read_can_lock(rw) ((rw)->lock >= 0)
/*
* write_can_lock - would write_trylock() succeed?
* @lock: the rwlock in question.
*/
#define __raw_write_can_lock(rw) (!(rw)->lock)
static inline void __raw_read_lock(raw_rwlock_t *rw) static inline void __raw_read_lock(raw_rwlock_t *rw)
{ {
unsigned int tmp; unsigned int tmp;