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172 行
7.7 KiB
C
172 行
7.7 KiB
C
/* This file is derived from clang's stdatomic.h */
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/*===---- stdatomic.h - Standard header for atomic types and operations -----===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef _STDATOMIC_H
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#define _STDATOMIC_H
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#define __ATOMIC_RELAXED 0
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#define __ATOMIC_CONSUME 1
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#define __ATOMIC_ACQUIRE 2
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#define __ATOMIC_RELEASE 3
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#define __ATOMIC_ACQ_REL 4
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#define __ATOMIC_SEQ_CST 5
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/* Memory ordering */
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typedef enum {
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memory_order_relaxed = __ATOMIC_RELAXED,
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memory_order_consume = __ATOMIC_CONSUME,
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memory_order_acquire = __ATOMIC_ACQUIRE,
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memory_order_release = __ATOMIC_RELEASE,
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memory_order_acq_rel = __ATOMIC_ACQ_REL,
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memory_order_seq_cst = __ATOMIC_SEQ_CST,
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} memory_order;
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/* Atomic typedefs */
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typedef _Atomic(_Bool) atomic_bool;
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typedef _Atomic(char) atomic_char;
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typedef _Atomic(signed char) atomic_schar;
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typedef _Atomic(unsigned char) atomic_uchar;
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typedef _Atomic(short) atomic_short;
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typedef _Atomic(unsigned short) atomic_ushort;
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typedef _Atomic(int) atomic_int;
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typedef _Atomic(unsigned int) atomic_uint;
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typedef _Atomic(long) atomic_long;
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typedef _Atomic(unsigned long) atomic_ulong;
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typedef _Atomic(long long) atomic_llong;
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typedef _Atomic(unsigned long long) atomic_ullong;
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typedef _Atomic(uint_least16_t) atomic_char16_t;
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typedef _Atomic(uint_least32_t) atomic_char32_t;
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typedef _Atomic(wchar_t) atomic_wchar_t;
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typedef _Atomic(int_least8_t) atomic_int_least8_t;
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typedef _Atomic(uint_least8_t) atomic_uint_least8_t;
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typedef _Atomic(int_least16_t) atomic_int_least16_t;
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typedef _Atomic(uint_least16_t) atomic_uint_least16_t;
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typedef _Atomic(int_least32_t) atomic_int_least32_t;
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typedef _Atomic(uint_least32_t) atomic_uint_least32_t;
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typedef _Atomic(int_least64_t) atomic_int_least64_t;
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typedef _Atomic(uint_least64_t) atomic_uint_least64_t;
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typedef _Atomic(int_fast8_t) atomic_int_fast8_t;
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typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t;
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typedef _Atomic(int_fast16_t) atomic_int_fast16_t;
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typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t;
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typedef _Atomic(int_fast32_t) atomic_int_fast32_t;
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typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t;
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typedef _Atomic(int_fast64_t) atomic_int_fast64_t;
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typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t;
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typedef _Atomic(intptr_t) atomic_intptr_t;
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typedef _Atomic(uintptr_t) atomic_uintptr_t;
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typedef _Atomic(size_t) atomic_size_t;
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typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t;
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typedef _Atomic(intmax_t) atomic_intmax_t;
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typedef _Atomic(uintmax_t) atomic_uintmax_t;
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/* Atomic flag */
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typedef struct {
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atomic_bool value;
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} atomic_flag;
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#define ATOMIC_FLAG_INIT {0}
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#define ATOMIC_VAR_INIT(value) (value)
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/* Generic routines */
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#define atomic_init(object, desired) \
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atomic_store_explicit(object, desired, __ATOMIC_RELAXED)
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#define __atomic_store_n(ptr, val, order) \
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(*(ptr) = (val), __atomic_store((ptr), &(typeof(*(ptr))){val}, (order)))
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#define atomic_store_explicit(object, desired, order) \
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({ __typeof__ (object) ptr = (object); \
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__typeof__ (*ptr) tmp = (desired); \
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__atomic_store (ptr, &tmp, (order)); \
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})
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#define atomic_store(object, desired) \
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atomic_store_explicit (object, desired, __ATOMIC_SEQ_CST)
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#define __atomic_load_n(ptr, order) \
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({ typeof(*(ptr)) __val; \
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__atomic_load((ptr), &__val, (order)); \
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__val; })
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#define atomic_load_explicit(object, order) \
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({ __typeof__ (object) ptr = (object); \
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__typeof__ ((void)0,*ptr) tmp; \
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__atomic_load (ptr, &tmp, (order)); \
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tmp; \
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})
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#define atomic_load(object) atomic_load_explicit (object, __ATOMIC_SEQ_CST)
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#define atomic_exchange_explicit(object, desired, order) \
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({ __typeof__ (object) ptr = (object); \
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__typeof__ (*ptr) val = (desired); \
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__typeof__ (*ptr) tmp; \
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__atomic_exchange (ptr, &val, &tmp, (order)); \
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tmp; \
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})
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#define atomic_exchange(object, desired) \
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atomic_exchange_explicit (object, desired, __ATOMIC_SEQ_CST)
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#define __atomic_compare_exchange_n(ptr, expected, desired, weak, success, failure) \
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({ typeof(*(ptr)) __desired = (desired); \
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__atomic_compare_exchange((ptr), (expected), &__desired, \
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(weak), (success), (failure)); })
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#define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \
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({ __typeof__ (object) ptr = (object); \
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__typeof__ (*ptr) tmp = desired; \
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__atomic_compare_exchange(ptr, expected, &tmp, 0, success, failure); \
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})
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#define atomic_compare_exchange_strong(object, expected, desired) \
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atomic_compare_exchange_strong_explicit (object, expected, desired, \
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__ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
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#define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \
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({ __typeof__ (object) ptr = (object); \
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__typeof__ (*ptr) tmp = desired; \
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__atomic_compare_exchange(ptr, expected, &tmp, 1, success, failure); \
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})
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#define atomic_compare_exchange_weak(object, expected, desired) \
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atomic_compare_exchange_weak_explicit (object, expected, desired, \
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__ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
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#define atomic_fetch_add(object, operand) \
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__atomic_fetch_add(object, operand, __ATOMIC_SEQ_CST)
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#define atomic_fetch_add_explicit __atomic_fetch_add
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#define atomic_fetch_sub(object, operand) \
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__atomic_fetch_sub(object, operand, __ATOMIC_SEQ_CST)
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#define atomic_fetch_sub_explicit __atomic_fetch_sub
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#define atomic_fetch_or(object, operand) \
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__atomic_fetch_or(object, operand, __ATOMIC_SEQ_CST)
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#define atomic_fetch_or_explicit __atomic_fetch_or
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#define atomic_fetch_xor(object, operand) \
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__atomic_fetch_xor(object, operand, __ATOMIC_SEQ_CST)
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#define atomic_fetch_xor_explicit __atomic_fetch_xor
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#define atomic_fetch_and(object, operand) \
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__atomic_fetch_and(object, operand, __ATOMIC_SEQ_CST)
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#define atomic_fetch_and_explicit __atomic_fetch_and
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extern void atomic_thread_fence (memory_order);
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#define __atomic_thread_fence(order) atomic_thread_fence (order)
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extern void atomic_signal_fence (memory_order);
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#define __atomic_signal_fence(order) atomic_signal_fence(order)
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#define atomic_signal_fence(order) __atomic_signal_fence (order)
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extern bool __atomic_is_lock_free(size_t size, void *ptr);
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#define atomic_is_lock_free(OBJ) __atomic_is_lock_free (sizeof (*(OBJ)), (OBJ))
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extern bool atomic_flag_test_and_set(void *object);
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extern bool atomic_flag_test_and_set_explicit(void *object, memory_order order);
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extern void atomic_flag_clear(void *object);
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extern void atomic_flag_clear_explicit(void *object, memory_order order);
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#endif /* _STDATOMIC_H */
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