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(lll_robust_mutex_dead, lll_robust_mutex_trylock, lll_robust_mutex_lock,

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lll_robust_mutex_cond_lock, lll_robust_mutex_timedlock,
lll_robust_mutex_unlock): New macros.
(__lll_robust_lock_wait, __lll_robust_timedlock_wait): New prototypes.
This commit is contained in:
Ulrich Drepper 2006-02-17 18:44:32 +00:00
parent e112446e01
commit 26d77dc296
1 changed files with 61 additions and 1 deletions
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62
sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
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@ -1,4 +1,4 @@
/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -64,6 +64,15 @@
INTERNAL_SYSCALL_ERROR_P (__ret, __err)? -__ret : __ret; \
})
#define lll_robust_mutex_dead(futexv) \
do \
{ \
int *__futexp = &(futexv); \
atomic_or (__futexp, FUTEX_OWNER_DIED); \
lll_futex_wake (__futexp, 1); \
} \
while (0)
/* Returns non-zero if error happened, zero if success. */
#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val) \
({ \
@ -106,7 +115,16 @@ __lll_mutex_cond_trylock(int *futex)
#define lll_mutex_cond_trylock(lock) __lll_mutex_cond_trylock (&(lock))
static inline int __attribute__((always_inline))
__lll_robust_mutex_trylock(int *futex, int id)
{
return atomic_compare_and_exchange_val_acq (futex, id, 0) != 0;
}
#define lll_robust_mutex_trylock(lock, id) \
__lll_robust_mutex_trylock (&(lock), id)
extern void __lll_lock_wait (int *futex) attribute_hidden;
extern int __lll_robust_lock_wait (int *futex) attribute_hidden;
static inline void __attribute__((always_inline))
__lll_mutex_lock(int *futex)
@ -117,6 +135,18 @@ __lll_mutex_lock(int *futex)
#define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
static inline int __attribute__ ((always_inline))
__lll_robust_mutex_lock (int *futex, int id)
{
int result = 0;
if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0)
result = __lll_robust_lock_wait (futex);
return result;
}
#define lll_robust_mutex_lock(futex, id) \
__lll_robust_mutex_lock (&(futex), id)
static inline void __attribute__ ((always_inline))
__lll_mutex_cond_lock (int *futex)
{
@ -126,8 +156,14 @@ __lll_mutex_cond_lock (int *futex)
#define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex))
#define lll_robust_mutex_cond_lock(futex, id) \
__lll_robust_mutex_lock (&(futex), (id) | FUTEX_WAITERS)
extern int __lll_timedlock_wait (int *futex, const struct timespec *)
attribute_hidden;
extern int __lll_robust_timedlock_wait (int *futex, const struct timespec *)
attribute_hidden;
static inline int __attribute__ ((always_inline))
__lll_mutex_timedlock (int *futex, const struct timespec *abstime)
@ -141,6 +177,19 @@ __lll_mutex_timedlock (int *futex, const struct timespec *abstime)
__lll_mutex_timedlock (&(futex), abstime)
static inline int __attribute__ ((always_inline))
__lll_robust_mutex_timedlock (int *futex, const struct timespec *abstime,
int id)
{
int result = 0;
if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0)
result = __lll_robust_timedlock_wait (futex, abstime);
return result;
}
#define lll_robust_mutex_timedlock(futex, abstime, id) \
__lll_robust_mutex_timedlock (&(futex), abstime, id)
static inline void __attribute__ ((always_inline))
__lll_mutex_unlock (int *futex)
{
@ -151,6 +200,17 @@ __lll_mutex_unlock (int *futex)
#define lll_mutex_unlock(futex) __lll_mutex_unlock(&(futex))
static inline void __attribute__ ((always_inline))
__lll_robust_mutex_unlock (int *futex, int mask)
{
int val = atomic_exchange_rel (futex, 0);
if (__builtin_expect (val & mask, 0))
lll_futex_wake (futex, 1);
}
#define lll_robust_mutex_unlock(futex) \
__lll_robust_mutex_unlock(&(futex), FUTEX_WAITERS)
static inline void __attribute__ ((always_inline))
__lll_mutex_unlock_force (int *futex)
{