ed3c78771f
Bionic stdatomic.h is also used for the host (via a copy in
prebuilts/clang). Revert to guarding the include of uchar.h based on
__STDC_VERSION__, so it is included only when needed.
Change-Id: I5b45c7f5d16da223478512104702a3e4e5a975ae
Test: bionic tests on host and Angler. Confirmed failures I am
seeing are KIs.
546 lines
18 KiB
C++
546 lines
18 KiB
C++
/*-
|
|
* Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org>
|
|
* David Chisnall <theraven@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _STDATOMIC_H_
|
|
#define _STDATOMIC_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#if defined(__cplusplus) && __cplusplus >= 201103L && defined(_USING_LIBCXX)
|
|
# ifdef __clang__
|
|
# if __has_feature(cxx_atomic)
|
|
# define _STDATOMIC_HAVE_ATOMIC
|
|
# endif
|
|
# else /* gcc */
|
|
# define _STDATOMIC_HAVE_ATOMIC
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef _STDATOMIC_HAVE_ATOMIC
|
|
|
|
/* We have a usable C++ <atomic>; use it instead. */
|
|
|
|
#include <atomic>
|
|
|
|
#undef _Atomic
|
|
/* Also defined by <atomic> for gcc. But not used in macros. */
|
|
/* Also a clang intrinsic. */
|
|
/* Should not be used by client code before this file is */
|
|
/* included. The definitions in <atomic> themselves see */
|
|
/* the old definition, as they should. */
|
|
/* Client code sees the following definition. */
|
|
|
|
#define _Atomic(t) std::atomic<t>
|
|
|
|
using std::atomic_is_lock_free;
|
|
using std::atomic_init;
|
|
using std::atomic_store;
|
|
using std::atomic_store_explicit;
|
|
using std::atomic_load;
|
|
using std::atomic_load_explicit;
|
|
using std::atomic_exchange;
|
|
using std::atomic_exchange_explicit;
|
|
using std::atomic_compare_exchange_strong;
|
|
using std::atomic_compare_exchange_strong_explicit;
|
|
using std::atomic_compare_exchange_weak;
|
|
using std::atomic_compare_exchange_weak_explicit;
|
|
using std::atomic_fetch_add;
|
|
using std::atomic_fetch_add_explicit;
|
|
using std::atomic_fetch_sub;
|
|
using std::atomic_fetch_sub_explicit;
|
|
using std::atomic_fetch_or;
|
|
using std::atomic_fetch_or_explicit;
|
|
using std::atomic_fetch_xor;
|
|
using std::atomic_fetch_xor_explicit;
|
|
using std::atomic_fetch_and;
|
|
using std::atomic_fetch_and_explicit;
|
|
using std::atomic_thread_fence;
|
|
using std::atomic_signal_fence;
|
|
|
|
using std::memory_order;
|
|
using std::memory_order_relaxed;
|
|
using std::memory_order_consume;
|
|
using std::memory_order_acquire;
|
|
using std::memory_order_release;
|
|
using std::memory_order_acq_rel;
|
|
using std::memory_order_seq_cst;
|
|
|
|
using std::atomic_bool;
|
|
using std::atomic_char;
|
|
using std::atomic_schar;
|
|
using std::atomic_uchar;
|
|
using std::atomic_short;
|
|
using std::atomic_ushort;
|
|
using std::atomic_int;
|
|
using std::atomic_uint;
|
|
using std::atomic_long;
|
|
using std::atomic_ulong;
|
|
using std::atomic_llong;
|
|
using std::atomic_ullong;
|
|
using std::atomic_char16_t;
|
|
using std::atomic_char32_t;
|
|
using std::atomic_wchar_t;
|
|
using std::atomic_int_least8_t;
|
|
using std::atomic_uint_least8_t;
|
|
using std::atomic_int_least16_t;
|
|
using std::atomic_uint_least16_t;
|
|
using std::atomic_int_least32_t;
|
|
using std::atomic_uint_least32_t;
|
|
using std::atomic_int_least64_t;
|
|
using std::atomic_uint_least64_t;
|
|
using std::atomic_int_fast8_t;
|
|
using std::atomic_uint_fast8_t;
|
|
using std::atomic_int_fast16_t;
|
|
using std::atomic_uint_fast16_t;
|
|
using std::atomic_int_fast32_t;
|
|
using std::atomic_uint_fast32_t;
|
|
using std::atomic_int_fast64_t;
|
|
using std::atomic_uint_fast64_t;
|
|
using std::atomic_intptr_t;
|
|
using std::atomic_uintptr_t;
|
|
using std::atomic_size_t;
|
|
using std::atomic_ptrdiff_t;
|
|
using std::atomic_intmax_t;
|
|
using std::atomic_uintmax_t;
|
|
|
|
#else /* <atomic> unavailable, possibly because this is C, not C++ */
|
|
|
|
#include <sys/types.h>
|
|
#include <stdbool.h>
|
|
|
|
/*
|
|
* C: Do it ourselves.
|
|
* Note that the runtime representation defined here should be compatible
|
|
* with the C++ one, i.e. an _Atomic(T) needs to contain the same
|
|
* bits as a T.
|
|
*/
|
|
|
|
#include <stddef.h> /* For ptrdiff_t. */
|
|
#include <stdint.h> /* TODO: don't drag in all the macros, just the types. */
|
|
// Include uchar.h only when needed. Bionic's stdatomic.h is also used for the
|
|
// host (via a copy in prebuilts/clang) and uchar.h is not available in the
|
|
// glibc used for the host.
|
|
#if __STDC_VERSION__ >= 201112L
|
|
# include <uchar.h> /* For char16_t and char32_t. */
|
|
#endif
|
|
|
|
|
|
#ifdef __clang__
|
|
# if __has_extension(c_atomic) || __has_extension(cxx_atomic)
|
|
# define __CLANG_ATOMICS
|
|
# else
|
|
# error "stdatomic.h does not support your compiler"
|
|
# endif
|
|
# if __has_builtin(__sync_swap)
|
|
# define __HAS_BUILTIN_SYNC_SWAP
|
|
# endif
|
|
#else
|
|
# define __GNUC_ATOMICS
|
|
#endif
|
|
|
|
/*
|
|
* 7.17.1 Atomic lock-free macros.
|
|
*/
|
|
|
|
#ifdef __GCC_ATOMIC_BOOL_LOCK_FREE
|
|
#define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_CHAR_LOCK_FREE
|
|
#define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_CHAR16_T_LOCK_FREE
|
|
#define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_CHAR32_T_LOCK_FREE
|
|
#define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_WCHAR_T_LOCK_FREE
|
|
#define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_SHORT_LOCK_FREE
|
|
#define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_INT_LOCK_FREE
|
|
#define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_LONG_LOCK_FREE
|
|
#define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_LLONG_LOCK_FREE
|
|
#define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE
|
|
#endif
|
|
#ifdef __GCC_ATOMIC_POINTER_LOCK_FREE
|
|
#define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE
|
|
#endif
|
|
|
|
/*
|
|
* 7.17.2 Initialization.
|
|
*/
|
|
|
|
#if defined(__CLANG_ATOMICS)
|
|
#define ATOMIC_VAR_INIT(value) (value)
|
|
#define atomic_init(obj, value) __c11_atomic_init(obj, value)
|
|
#else
|
|
#define ATOMIC_VAR_INIT(value) { .__val = (value) }
|
|
#define atomic_init(obj, value) ((void)((obj)->__val = (value)))
|
|
#endif
|
|
|
|
/*
|
|
* Clang and recent GCC both provide predefined macros for the memory
|
|
* orderings. If we are using a compiler that doesn't define them, use the
|
|
* clang values - these will be ignored in the fallback path.
|
|
*/
|
|
|
|
#ifndef __ATOMIC_RELAXED
|
|
#define __ATOMIC_RELAXED 0
|
|
#endif
|
|
#ifndef __ATOMIC_CONSUME
|
|
#define __ATOMIC_CONSUME 1
|
|
#endif
|
|
#ifndef __ATOMIC_ACQUIRE
|
|
#define __ATOMIC_ACQUIRE 2
|
|
#endif
|
|
#ifndef __ATOMIC_RELEASE
|
|
#define __ATOMIC_RELEASE 3
|
|
#endif
|
|
#ifndef __ATOMIC_ACQ_REL
|
|
#define __ATOMIC_ACQ_REL 4
|
|
#endif
|
|
#ifndef __ATOMIC_SEQ_CST
|
|
#define __ATOMIC_SEQ_CST 5
|
|
#endif
|
|
|
|
/*
|
|
* 7.17.3 Order and consistency.
|
|
*
|
|
* The memory_order_* constants that denote the barrier behaviour of the
|
|
* atomic operations.
|
|
* The enum values must be identical to those used by the
|
|
* C++ <atomic> header.
|
|
*/
|
|
|
|
typedef enum {
|
|
memory_order_relaxed = __ATOMIC_RELAXED,
|
|
memory_order_consume = __ATOMIC_CONSUME,
|
|
memory_order_acquire = __ATOMIC_ACQUIRE,
|
|
memory_order_release = __ATOMIC_RELEASE,
|
|
memory_order_acq_rel = __ATOMIC_ACQ_REL,
|
|
memory_order_seq_cst = __ATOMIC_SEQ_CST
|
|
} memory_order;
|
|
|
|
/*
|
|
* 7.17.4 Fences.
|
|
*/
|
|
|
|
static __inline void
|
|
atomic_thread_fence(memory_order __order __attribute__((unused)))
|
|
{
|
|
|
|
#ifdef __CLANG_ATOMICS
|
|
__c11_atomic_thread_fence(__order);
|
|
#elif defined(__GNUC_ATOMICS)
|
|
__atomic_thread_fence(__order);
|
|
#else
|
|
__sync_synchronize();
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
atomic_signal_fence(memory_order __order __attribute__((unused)))
|
|
{
|
|
|
|
#ifdef __CLANG_ATOMICS
|
|
__c11_atomic_signal_fence(__order);
|
|
#elif defined(__GNUC_ATOMICS)
|
|
__atomic_signal_fence(__order);
|
|
#else
|
|
__asm volatile ("" ::: "memory");
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* 7.17.5 Lock-free property.
|
|
*/
|
|
|
|
#if defined(_KERNEL)
|
|
/* Atomics in kernelspace are always lock-free. */
|
|
#define atomic_is_lock_free(obj) \
|
|
((void)(obj), (_Bool)1)
|
|
#elif defined(__CLANG_ATOMICS)
|
|
#define atomic_is_lock_free(obj) \
|
|
__c11_atomic_is_lock_free(sizeof(*(obj)))
|
|
#elif defined(__GNUC_ATOMICS)
|
|
#define atomic_is_lock_free(obj) \
|
|
__atomic_is_lock_free(sizeof((obj)->__val), &(obj)->__val)
|
|
#else
|
|
#define atomic_is_lock_free(obj) \
|
|
((void)(obj), sizeof((obj)->__val) <= sizeof(void *))
|
|
#endif
|
|
|
|
/*
|
|
* 7.17.6 Atomic integer types.
|
|
*/
|
|
|
|
#ifndef __CLANG_ATOMICS
|
|
/*
|
|
* No native support for _Atomic(). Place object in structure to prevent
|
|
* most forms of direct non-atomic access.
|
|
*/
|
|
#define _Atomic(T) struct { T volatile __val; }
|
|
#endif
|
|
|
|
typedef _Atomic(bool) atomic_bool;
|
|
typedef _Atomic(char) atomic_char;
|
|
typedef _Atomic(signed char) atomic_schar;
|
|
typedef _Atomic(unsigned char) atomic_uchar;
|
|
typedef _Atomic(short) atomic_short;
|
|
typedef _Atomic(unsigned short) atomic_ushort;
|
|
typedef _Atomic(int) atomic_int;
|
|
typedef _Atomic(unsigned int) atomic_uint;
|
|
typedef _Atomic(long) atomic_long;
|
|
typedef _Atomic(unsigned long) atomic_ulong;
|
|
typedef _Atomic(long long) atomic_llong;
|
|
typedef _Atomic(unsigned long long) atomic_ullong;
|
|
#if __STDC_VERSION__ >= 201112L || __cplusplus >= 201103L
|
|
typedef _Atomic(char16_t) atomic_char16_t;
|
|
typedef _Atomic(char32_t) atomic_char32_t;
|
|
#endif
|
|
typedef _Atomic(wchar_t) atomic_wchar_t;
|
|
typedef _Atomic(int_least8_t) atomic_int_least8_t;
|
|
typedef _Atomic(uint_least8_t) atomic_uint_least8_t;
|
|
typedef _Atomic(int_least16_t) atomic_int_least16_t;
|
|
typedef _Atomic(uint_least16_t) atomic_uint_least16_t;
|
|
typedef _Atomic(int_least32_t) atomic_int_least32_t;
|
|
typedef _Atomic(uint_least32_t) atomic_uint_least32_t;
|
|
typedef _Atomic(int_least64_t) atomic_int_least64_t;
|
|
typedef _Atomic(uint_least64_t) atomic_uint_least64_t;
|
|
typedef _Atomic(int_fast8_t) atomic_int_fast8_t;
|
|
typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t;
|
|
typedef _Atomic(int_fast16_t) atomic_int_fast16_t;
|
|
typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t;
|
|
typedef _Atomic(int_fast32_t) atomic_int_fast32_t;
|
|
typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t;
|
|
typedef _Atomic(int_fast64_t) atomic_int_fast64_t;
|
|
typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t;
|
|
typedef _Atomic(intptr_t) atomic_intptr_t;
|
|
typedef _Atomic(uintptr_t) atomic_uintptr_t;
|
|
typedef _Atomic(size_t) atomic_size_t;
|
|
typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t;
|
|
typedef _Atomic(intmax_t) atomic_intmax_t;
|
|
typedef _Atomic(uintmax_t) atomic_uintmax_t;
|
|
|
|
/*
|
|
* 7.17.7 Operations on atomic types.
|
|
*/
|
|
|
|
/*
|
|
* Compiler-specific operations.
|
|
*/
|
|
|
|
#if defined(__CLANG_ATOMICS)
|
|
#define atomic_compare_exchange_strong_explicit(object, expected, \
|
|
desired, success, failure) \
|
|
__c11_atomic_compare_exchange_strong(object, expected, desired, \
|
|
success, failure)
|
|
#define atomic_compare_exchange_weak_explicit(object, expected, \
|
|
desired, success, failure) \
|
|
__c11_atomic_compare_exchange_weak(object, expected, desired, \
|
|
success, failure)
|
|
#define atomic_exchange_explicit(object, desired, order) \
|
|
__c11_atomic_exchange(object, desired, order)
|
|
#define atomic_fetch_add_explicit(object, operand, order) \
|
|
__c11_atomic_fetch_add(object, operand, order)
|
|
#define atomic_fetch_and_explicit(object, operand, order) \
|
|
__c11_atomic_fetch_and(object, operand, order)
|
|
#define atomic_fetch_or_explicit(object, operand, order) \
|
|
__c11_atomic_fetch_or(object, operand, order)
|
|
#define atomic_fetch_sub_explicit(object, operand, order) \
|
|
__c11_atomic_fetch_sub(object, operand, order)
|
|
#define atomic_fetch_xor_explicit(object, operand, order) \
|
|
__c11_atomic_fetch_xor(object, operand, order)
|
|
#define atomic_load_explicit(object, order) \
|
|
__c11_atomic_load(object, order)
|
|
#define atomic_store_explicit(object, desired, order) \
|
|
__c11_atomic_store(object, desired, order)
|
|
#elif defined(__GNUC_ATOMICS)
|
|
#define atomic_compare_exchange_strong_explicit(object, expected, \
|
|
desired, success, failure) \
|
|
__atomic_compare_exchange_n(&(object)->__val, expected, \
|
|
desired, 0, success, failure)
|
|
#define atomic_compare_exchange_weak_explicit(object, expected, \
|
|
desired, success, failure) \
|
|
__atomic_compare_exchange_n(&(object)->__val, expected, \
|
|
desired, 1, success, failure)
|
|
#define atomic_exchange_explicit(object, desired, order) \
|
|
__atomic_exchange_n(&(object)->__val, desired, order)
|
|
#define atomic_fetch_add_explicit(object, operand, order) \
|
|
__atomic_fetch_add(&(object)->__val, operand, order)
|
|
#define atomic_fetch_and_explicit(object, operand, order) \
|
|
__atomic_fetch_and(&(object)->__val, operand, order)
|
|
#define atomic_fetch_or_explicit(object, operand, order) \
|
|
__atomic_fetch_or(&(object)->__val, operand, order)
|
|
#define atomic_fetch_sub_explicit(object, operand, order) \
|
|
__atomic_fetch_sub(&(object)->__val, operand, order)
|
|
#define atomic_fetch_xor_explicit(object, operand, order) \
|
|
__atomic_fetch_xor(&(object)->__val, operand, order)
|
|
#define atomic_load_explicit(object, order) \
|
|
__atomic_load_n(&(object)->__val, order)
|
|
#define atomic_store_explicit(object, desired, order) \
|
|
__atomic_store_n(&(object)->__val, desired, order)
|
|
#else
|
|
#define __atomic_apply_stride(object, operand) \
|
|
(((__typeof__((object)->__val))0) + (operand))
|
|
#define atomic_compare_exchange_strong_explicit(object, expected, \
|
|
desired, success, failure) __extension__ ({ \
|
|
__typeof__(expected) __ep = (expected); \
|
|
__typeof__(*__ep) __e = *__ep; \
|
|
(void)(success); (void)(failure); \
|
|
(bool)((*__ep = __sync_val_compare_and_swap(&(object)->__val, \
|
|
__e, desired)) == __e); \
|
|
})
|
|
#define atomic_compare_exchange_weak_explicit(object, expected, \
|
|
desired, success, failure) \
|
|
atomic_compare_exchange_strong_explicit(object, expected, \
|
|
desired, success, failure)
|
|
#ifdef __HAS_BUILTIN_SYNC_SWAP
|
|
/* Clang provides a full-barrier atomic exchange - use it if available. */
|
|
#define atomic_exchange_explicit(object, desired, order) \
|
|
((void)(order), __sync_swap(&(object)->__val, desired))
|
|
#else
|
|
/*
|
|
* __sync_lock_test_and_set() is only an acquire barrier in theory (although in
|
|
* practice it is usually a full barrier) so we need an explicit barrier before
|
|
* it.
|
|
*/
|
|
#define atomic_exchange_explicit(object, desired, order) \
|
|
__extension__ ({ \
|
|
__typeof__(object) __o = (object); \
|
|
__typeof__(desired) __d = (desired); \
|
|
(void)(order); \
|
|
__sync_synchronize(); \
|
|
__sync_lock_test_and_set(&(__o)->__val, __d); \
|
|
})
|
|
#endif
|
|
#define atomic_fetch_add_explicit(object, operand, order) \
|
|
((void)(order), __sync_fetch_and_add(&(object)->__val, \
|
|
__atomic_apply_stride(object, operand)))
|
|
#define atomic_fetch_and_explicit(object, operand, order) \
|
|
((void)(order), __sync_fetch_and_and(&(object)->__val, operand))
|
|
#define atomic_fetch_or_explicit(object, operand, order) \
|
|
((void)(order), __sync_fetch_and_or(&(object)->__val, operand))
|
|
#define atomic_fetch_sub_explicit(object, operand, order) \
|
|
((void)(order), __sync_fetch_and_sub(&(object)->__val, \
|
|
__atomic_apply_stride(object, operand)))
|
|
#define atomic_fetch_xor_explicit(object, operand, order) \
|
|
((void)(order), __sync_fetch_and_xor(&(object)->__val, operand))
|
|
#define atomic_load_explicit(object, order) \
|
|
((void)(order), __sync_fetch_and_add(&(object)->__val, 0))
|
|
#define atomic_store_explicit(object, desired, order) \
|
|
((void)atomic_exchange_explicit(object, desired, order))
|
|
#endif
|
|
|
|
/*
|
|
* Convenience functions.
|
|
*
|
|
* Don't provide these in kernel space. In kernel space, we should be
|
|
* disciplined enough to always provide explicit barriers.
|
|
*/
|
|
|
|
#ifndef _KERNEL
|
|
#define atomic_compare_exchange_strong(object, expected, desired) \
|
|
atomic_compare_exchange_strong_explicit(object, expected, \
|
|
desired, memory_order_seq_cst, memory_order_seq_cst)
|
|
#define atomic_compare_exchange_weak(object, expected, desired) \
|
|
atomic_compare_exchange_weak_explicit(object, expected, \
|
|
desired, memory_order_seq_cst, memory_order_seq_cst)
|
|
#define atomic_exchange(object, desired) \
|
|
atomic_exchange_explicit(object, desired, memory_order_seq_cst)
|
|
#define atomic_fetch_add(object, operand) \
|
|
atomic_fetch_add_explicit(object, operand, memory_order_seq_cst)
|
|
#define atomic_fetch_and(object, operand) \
|
|
atomic_fetch_and_explicit(object, operand, memory_order_seq_cst)
|
|
#define atomic_fetch_or(object, operand) \
|
|
atomic_fetch_or_explicit(object, operand, memory_order_seq_cst)
|
|
#define atomic_fetch_sub(object, operand) \
|
|
atomic_fetch_sub_explicit(object, operand, memory_order_seq_cst)
|
|
#define atomic_fetch_xor(object, operand) \
|
|
atomic_fetch_xor_explicit(object, operand, memory_order_seq_cst)
|
|
#define atomic_load(object) \
|
|
atomic_load_explicit(object, memory_order_seq_cst)
|
|
#define atomic_store(object, desired) \
|
|
atomic_store_explicit(object, desired, memory_order_seq_cst)
|
|
#endif /* !_KERNEL */
|
|
|
|
/*
|
|
* 7.17.8 Atomic flag type and operations.
|
|
*
|
|
* XXX: Assume atomic_bool can be used as an atomic_flag. Is there some
|
|
* kind of compiler built-in type we could use?
|
|
*/
|
|
|
|
typedef struct {
|
|
atomic_bool __flag;
|
|
} atomic_flag;
|
|
|
|
#define ATOMIC_FLAG_INIT { ATOMIC_VAR_INIT(false) }
|
|
|
|
static __inline bool
|
|
atomic_flag_test_and_set_explicit(volatile atomic_flag *__object,
|
|
memory_order __order)
|
|
{
|
|
return (atomic_exchange_explicit(&__object->__flag, 1, __order));
|
|
}
|
|
|
|
static __inline void
|
|
atomic_flag_clear_explicit(volatile atomic_flag *__object, memory_order __order)
|
|
{
|
|
|
|
atomic_store_explicit(&__object->__flag, 0, __order);
|
|
}
|
|
|
|
#ifndef _KERNEL
|
|
static __inline bool
|
|
atomic_flag_test_and_set(volatile atomic_flag *__object)
|
|
{
|
|
|
|
return (atomic_flag_test_and_set_explicit(__object,
|
|
memory_order_seq_cst));
|
|
}
|
|
|
|
static __inline void
|
|
atomic_flag_clear(volatile atomic_flag *__object)
|
|
{
|
|
|
|
atomic_flag_clear_explicit(__object, memory_order_seq_cst);
|
|
}
|
|
#endif /* !_KERNEL */
|
|
|
|
#endif /* <atomic> unavailable */
|
|
|
|
#endif /* !_STDATOMIC_H_ */
|