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(FUTEX_CMP_REQUEUE): Define.

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(lll_futex_requeue): Add val argument, use FUTEX_CMP_REQUEUE
internally.  Return non-zero if error, zero if success.
This commit is contained in:
Ulrich Drepper 2004-06-03 15:57:25 +00:00
parent 8a9a971c4d
commit e0a27e2f47
1 changed files with 7 additions and 5 deletions
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12
sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
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@ -30,6 +30,7 @@
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
/* Initializer for compatibility lock. */
#define LLL_MUTEX_LOCK_INITIALIZER (0)
@ -61,14 +62,15 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret; \
})
#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex) \
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val) \
({ \
INTERNAL_SYSCALL_DECL (__err); \
long int __ret; \
__ret = INTERNAL_SYSCALL (futex, __err, 5, \
(futexp), FUTEX_REQUEUE, (nr_wake), (nr_move), \
(mutex)); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret; \
__ret = INTERNAL_SYSCALL (futex, __err, 6, \
(futexp), FUTEX_CMP_REQUEUE, (nr_wake), \
(nr_move), (mutex), (val)); \
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
})