mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-24 13:33:08 +03:00
b01fe5f792
* sysdeps/sparc/sparc32/dl-machine.h (LD_SO_PRELOAD): Remove unused
define.
* sysdeps/sparc/sparc32/bits/atomic.h: Include stdint.h, add
{,u}atomic*_t typedefs.
(__sparc32_atomic_do_lock): Add __volatile and memory clobber.
(__sparc32_atomic_do_unlock): Add memory barrier.
(__sparc32_atomic_do_lock24, __sparc32_atomic_do_unlock24): Define.
[!SHARED] (__v9_compare_and_exchange_val_32_acq): Define.
(__v7_compare_and_exchange_val_acq, __v7_compare_and_exchange_bool_acq,
__v7_exchange_acq, __v7_exchange_and_add, __v7_exchange_24_rel,
__v7_compare_and_exchange_val_24_acq, __atomic_is_v9,
atomic_exchange_acq, atomic_compare_and_exchange_val_24_acq,
atomic_exchange_24_rel): Define.
[SHARED] (atomic_exchange_and_add): Define.
[!SHARED] (__ATOMIC_HWCAP_SPARC_V9): Define.
[!SHARED] (_dl_hwcap): New weak decl.
* sysdeps/sparc/sparc32/sparcv9/bits/atomic.h (atomic_exchange_24_rel,
atomic_compare_and_exchange_val_24_acq): Define.
* sysdeps/sparc/sparc64/bits/atomic.h (atomic_exchange_24_rel,
atomic_compare_and_exchange_val_24_acq): Define.
245 lines
7.3 KiB
C
245 lines
7.3 KiB
C
/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Libr \ary; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#ifndef _LOWLEVELLOCK_H
|
|
#define _LOWLEVELLOCK_H 1
|
|
|
|
#include <time.h>
|
|
#include <sys/param.h>
|
|
#include <bits/pthreadtypes.h>
|
|
#include <atomic.h>
|
|
|
|
|
|
#define FUTEX_WAIT 0
|
|
#define FUTEX_WAKE 1
|
|
#define FUTEX_REQUEUE 3
|
|
#define FUTEX_CMP_REQUEUE 4
|
|
#define FUTEX_WAKE_OP 5
|
|
#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
|
|
|
|
/* Initializer for compatibility lock. */
|
|
#define LLL_MUTEX_LOCK_INITIALIZER (0)
|
|
|
|
#define lll_futex_wait(futexp, val) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
|
|
(futexp), FUTEX_WAIT, (val), 0); \
|
|
__ret; \
|
|
})
|
|
|
|
#define lll_futex_timed_wait(futexp, val, timespec) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
|
|
(futexp), FUTEX_WAIT, (val), (timespec)); \
|
|
__ret; \
|
|
})
|
|
|
|
#define lll_futex_wake(futexp, nr) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 4, \
|
|
(futexp), FUTEX_WAKE, (nr), 0); \
|
|
__ret; \
|
|
})
|
|
|
|
/* 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, 6, \
|
|
(futexp), FUTEX_CMP_REQUEUE, (nr_wake), \
|
|
(nr_move), (mutex), (val)); \
|
|
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
|
|
})
|
|
|
|
/* Returns non-zero if error happened, zero if success. */
|
|
#ifdef __sparc32_atomic_do_lock
|
|
/* Avoid FUTEX_WAKE_OP if supporting pre-v9 CPUs. */
|
|
# define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) 1
|
|
#else
|
|
# define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2) \
|
|
({ \
|
|
INTERNAL_SYSCALL_DECL (__err); \
|
|
long int __ret; \
|
|
\
|
|
__ret = INTERNAL_SYSCALL (futex, __err, 6, \
|
|
(futexp), FUTEX_WAKE_OP, (nr_wake), \
|
|
(nr_wake2), (futexp2), \
|
|
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
|
|
INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
|
|
})
|
|
#endif
|
|
|
|
static inline int
|
|
__attribute__ ((always_inline))
|
|
__lll_mutex_trylock (int *futex)
|
|
{
|
|
return atomic_compare_and_exchange_val_24_acq (futex, 1, 0) != 0;
|
|
}
|
|
#define lll_mutex_trylock(futex) __lll_mutex_trylock (&(futex))
|
|
|
|
static inline int
|
|
__attribute__ ((always_inline))
|
|
__lll_mutex_cond_trylock (int *futex)
|
|
{
|
|
return atomic_compare_and_exchange_val_24_acq (futex, 2, 0) != 0;
|
|
}
|
|
#define lll_mutex_cond_trylock(futex) __lll_mutex_cond_trylock (&(futex))
|
|
|
|
|
|
extern void __lll_lock_wait (int *futex) attribute_hidden;
|
|
|
|
|
|
static inline void
|
|
__attribute__ ((always_inline))
|
|
__lll_mutex_lock (int *futex)
|
|
{
|
|
int val = atomic_compare_and_exchange_val_24_acq (futex, 1, 0);
|
|
|
|
if (__builtin_expect (val != 0, 0))
|
|
__lll_lock_wait (futex);
|
|
}
|
|
#define lll_mutex_lock(futex) __lll_mutex_lock (&(futex))
|
|
|
|
|
|
static inline void
|
|
__attribute__ ((always_inline))
|
|
__lll_mutex_cond_lock (int *futex)
|
|
{
|
|
int val = atomic_compare_and_exchange_val_24_acq (futex, 2, 0);
|
|
|
|
if (__builtin_expect (val != 0, 0))
|
|
__lll_lock_wait (futex);
|
|
}
|
|
#define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex))
|
|
|
|
|
|
extern int __lll_timedlock_wait (int *futex, const struct timespec *)
|
|
attribute_hidden;
|
|
|
|
|
|
static inline int
|
|
__attribute__ ((always_inline))
|
|
__lll_mutex_timedlock (int *futex, const struct timespec *abstime)
|
|
{
|
|
int val = atomic_compare_and_exchange_val_24_acq (futex, 1, 0);
|
|
int result = 0;
|
|
|
|
if (__builtin_expect (val != 0, 0))
|
|
result = __lll_timedlock_wait (futex, abstime);
|
|
return result;
|
|
}
|
|
#define lll_mutex_timedlock(futex, abstime) \
|
|
__lll_mutex_timedlock (&(futex), abstime)
|
|
|
|
#define lll_mutex_unlock(lock) \
|
|
((void) ({ \
|
|
int *__futex = &(lock); \
|
|
int __val = atomic_exchange_24_rel (__futex, 0); \
|
|
if (__builtin_expect (__val > 1, 0)) \
|
|
lll_futex_wake (__futex, 1); \
|
|
}))
|
|
|
|
#define lll_mutex_unlock_force(lock) \
|
|
((void) ({ \
|
|
int *__futex = &(lock); \
|
|
(void) atomic_exchange_24_rel (__futex, 0); \
|
|
lll_futex_wake (__futex, 1); \
|
|
}))
|
|
|
|
#define lll_mutex_islocked(futex) \
|
|
(futex != 0)
|
|
|
|
|
|
/* We have a separate internal lock implementation which is not tied
|
|
to binary compatibility. We can use the lll_mutex_*. */
|
|
|
|
/* Type for lock object. */
|
|
typedef int lll_lock_t;
|
|
|
|
extern int lll_unlock_wake_cb (int *__futex) attribute_hidden;
|
|
|
|
/* Initializers for lock. */
|
|
#define LLL_LOCK_INITIALIZER (0)
|
|
#define LLL_LOCK_INITIALIZER_LOCKED (1)
|
|
|
|
#define lll_trylock(futex) lll_mutex_trylock (futex)
|
|
#define lll_lock(futex) lll_mutex_lock (futex)
|
|
#define lll_unlock(futex) lll_mutex_unlock (futex)
|
|
#define lll_islocked(futex) lll_mutex_islocked (futex)
|
|
|
|
|
|
/* The kernel notifies a process with uses CLONE_CLEARTID via futex
|
|
wakeup when the clone terminates. The memory location contains the
|
|
thread ID while the clone is running and is reset to zero
|
|
afterwards. */
|
|
#define lll_wait_tid(tid) \
|
|
do \
|
|
{ \
|
|
__typeof (tid) __tid; \
|
|
while ((__tid = (tid)) != 0) \
|
|
lll_futex_wait (&(tid), __tid); \
|
|
} \
|
|
while (0)
|
|
|
|
extern int __lll_timedwait_tid (int *, const struct timespec *)
|
|
attribute_hidden;
|
|
|
|
#define lll_timedwait_tid(tid, abstime) \
|
|
({ \
|
|
int __res = 0; \
|
|
if ((tid) != 0) \
|
|
__res = __lll_timedwait_tid (&(tid), (abstime)); \
|
|
__res; \
|
|
})
|
|
|
|
|
|
/* Conditional variable handling. */
|
|
|
|
extern void __lll_cond_wait (pthread_cond_t *cond)
|
|
attribute_hidden;
|
|
extern int __lll_cond_timedwait (pthread_cond_t *cond,
|
|
const struct timespec *abstime)
|
|
attribute_hidden;
|
|
extern void __lll_cond_wake (pthread_cond_t *cond)
|
|
attribute_hidden;
|
|
extern void __lll_cond_broadcast (pthread_cond_t *cond)
|
|
attribute_hidden;
|
|
|
|
#define lll_cond_wait(cond) \
|
|
__lll_cond_wait (cond)
|
|
#define lll_cond_timedwait(cond, abstime) \
|
|
__lll_cond_timedwait (cond, abstime)
|
|
#define lll_cond_wake(cond) \
|
|
__lll_cond_wake (cond)
|
|
#define lll_cond_broadcast(cond) \
|
|
__lll_cond_broadcast (cond)
|
|
|
|
#endif /* lowlevellock.h */
|