mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 19:30:10 +00:00
76a0b73e81
atomic_compare_and_exchange_bool_rel and catomic_compare_and_exchange_bool_rel are removed and replaced with the new C11-like atomic_compare_exchange_weak_release. The concurrent code in nscd/cache.c has not been reviewed yet, so this patch does not add detailed comments. * nscd/cache.c (cache_add): Use new C11-like atomic operation instead of atomic_compare_and_exchange_bool_rel. * nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_full): Likewise. * include/atomic.h (atomic_compare_and_exchange_bool_rel, catomic_compare_and_exchange_bool_rel): Remove. * sysdeps/aarch64/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/alpha/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/arm/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/mips/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise. * sysdeps/tile/atomic-machine.h (atomic_compare_and_exchange_bool_rel): Likewise.
82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
|
|
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 Library. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* The sub-architecture headers provide definitions for these macros
|
|
that work for "int" and "long" size values only:
|
|
|
|
atomic_compare_and_exchange_val_acq()
|
|
atomic_exchange_acq()
|
|
atomic_exchange_and_add()
|
|
atomic_and_val()
|
|
atomic_or_val()
|
|
atomic_decrement_if_positive() [tilegx only]
|
|
|
|
Here we provide generic definitions true for all Tilera chips. */
|
|
|
|
#include <stdint.h>
|
|
#include <features.h>
|
|
|
|
typedef int32_t atomic32_t;
|
|
typedef uint32_t uatomic32_t;
|
|
typedef int_fast32_t atomic_fast32_t;
|
|
typedef uint_fast32_t uatomic_fast32_t;
|
|
|
|
typedef int64_t atomic64_t;
|
|
typedef uint64_t uatomic64_t;
|
|
typedef int_fast64_t atomic_fast64_t;
|
|
typedef uint_fast64_t uatomic_fast64_t;
|
|
|
|
typedef intptr_t atomicptr_t;
|
|
typedef uintptr_t uatomicptr_t;
|
|
typedef intmax_t atomic_max_t;
|
|
typedef uintmax_t uatomic_max_t;
|
|
|
|
/* Barrier macro. */
|
|
#define atomic_full_barrier() __sync_synchronize()
|
|
|
|
/* APIs with "release" semantics. */
|
|
#define atomic_compare_and_exchange_val_rel(mem, n, o) \
|
|
({ \
|
|
atomic_full_barrier (); \
|
|
atomic_compare_and_exchange_val_acq ((mem), (n), (o)); \
|
|
})
|
|
#define atomic_exchange_rel(mem, n) \
|
|
({ \
|
|
atomic_full_barrier (); \
|
|
atomic_exchange_acq ((mem), (n)); \
|
|
})
|
|
|
|
/* Various macros that should just be synonyms. */
|
|
#define catomic_exchange_and_add atomic_exchange_and_add
|
|
#define atomic_and(mem, mask) ((void) atomic_and_val ((mem), (mask)))
|
|
#define catomic_and atomic_and
|
|
#define atomic_or(mem, mask) ((void) atomic_or_val ((mem), (mask)))
|
|
#define catomic_or atomic_or
|
|
|
|
/* atomic_bit_test_set in terms of atomic_or_val. */
|
|
#define atomic_bit_test_set(mem, bit) \
|
|
({ __typeof (*(mem)) __att0_mask = ((__typeof (*(mem))) 1 << (bit)); \
|
|
atomic_or_val ((mem), __att0_mask) & __att0_mask; })
|
|
|
|
/*
|
|
* This non-existent symbol is called for unsupporrted sizes,
|
|
* indicating a bug in the caller.
|
|
*/
|
|
extern int __atomic_error_bad_argument_size(void)
|
|
__attribute__ ((warning ("bad sizeof atomic argument")));
|