tinycc/include/stdatomic.h

/* This file is derived from clang's stdatomic.h */

/*===---- stdatomic.h - Standard header for atomic types and operations -----===
 *
 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 * See https://llvm.org/LICENSE.txt for license information.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 *
 *===-----------------------------------------------------------------------===
 */

#ifndef _STDATOMIC_H
#define _STDATOMIC_H

#include <stddef.h>
#include <stdint.h>

#define __ATOMIC_RELAXED 0
#define __ATOMIC_CONSUME 1
#define __ATOMIC_ACQUIRE 2
#define __ATOMIC_RELEASE 3
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_SEQ_CST 5

/* Memory ordering */
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;

/* Atomic typedefs */
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;
typedef _Atomic(uint_least16_t) atomic_char16_t;
typedef _Atomic(uint_least32_t) atomic_char32_t;
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;

/* Atomic flag */
typedef struct {
    atomic_bool value;
} atomic_flag;

#define ATOMIC_FLAG_INIT {0}

#define atomic_flag_test_and_set(object) \
    __atomic_exchange(&(object)->value, 1, __ATOMIC_SEQ_CST)
#define atomic_flag_test_and_set_explicit(object, order) \
    __atomic_exchange(&(object)->value, 1, order)

#define atomic_flag_clear(object) \
    __atomic_store(&(object)->value, 0, __ATOMIC_SEQ_CST)
#define atomic_flag_clear_explicit(object, order) \
    __atomic_store(&(object)->value, 0, order)

/* Generic routines */
#define atomic_init(object, desired) \
    __atomic_store(object, desired, __ATOMIC_RELAXED)

#define atomic_store(object, desired) \
    __atomic_store(object, desired, __ATOMIC_SEQ_CST)
#define atomic_store_explicit __atomic_store

#define atomic_load(object) \
    __atomic_load(object, __ATOMIC_SEQ_CST)
#define atomic_load_explicit __atomic_load

#define atomic_exchange(object, desired) \
    __atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
#define atomic_exchange_explicit __atomic_exchange

#define atomic_compare_exchange_strong(object, expected, desired) \
    __atomic_compare_exchange(object, expected, desired, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
#define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \
    __atomic_compare_exchange(object, expected, desired, 0, success, failure)

#define atomic_compare_exchange_weak(object, expected, desired) \
    __atomic_compare_exchange(object, expected, desired, 1, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
#define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \
    __atomic_compare_exchange(object, expected, desired, 1, success, failure)

#define atomic_fetch_add(object, operand) \
    __atomic_fetch_add(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_add_explicit __atomic_fetch_add

#define atomic_fetch_sub(object, operand) \
    __atomic_fetch_sub(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_sub_explicit __atomic_fetch_sub

#define atomic_fetch_or(object, operand) \
    __atomic_fetch_or(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_or_explicit __atomic_fetch_or

#define atomic_fetch_xor(object, operand) \
    __atomic_fetch_xor(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_xor_explicit __atomic_fetch_xor

#define atomic_fetch_and(object, operand) \
    __atomic_fetch_and(object, operand, __ATOMIC_SEQ_CST)
#define atomic_fetch_and_explicit __atomic_fetch_and

#endif /* _STDATOMIC_H */