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176 lines
8.3 KiB
C
176 lines
8.3 KiB
C
/* COPYRIGHT (c) 2017 Obsidian Research Corporation.
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* Licensed under BSD (MIT variant) or GPLv2. See COPYING.
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*
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* A version of C11 stdatomic.h that doesn't make spare angry. This doesn't
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* actually work.
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*/
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#ifndef _SPARSE_STDATOMIC_H_
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#define _SPARSE_STDATOMIC_H_
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#include <stddef.h>
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#include <stdint.h>
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#define _Atomic(T) struct {volatile __typeof__(T) __val; }
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#define ATOMIC_VAR_INIT(value) \
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{ \
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.__val = (value) \
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}
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#define atomic_init(obj, value) \
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do { \
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(obj)->__val = (value); \
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} while (0)
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enum memory_order {
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memory_order_relaxed,
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memory_order_consume,
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memory_order_acquire,
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memory_order_release,
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memory_order_acq_rel,
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memory_order_seq_cst,
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};
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typedef enum memory_order memory_order;
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#define atomic_thread_fence(order) __asm volatile("" : : : "memory")
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#define atomic_signal_fence(order) __asm volatile("" : : : "memory")
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#define atomic_is_lock_free(obj) (sizeof((obj)->__val) <= sizeof(void *))
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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(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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#define atomic_compare_exchange_strong_explicit(object, expected, desired, \
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success, failure) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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bool __r; \
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if (__v == *(expected)) { \
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r = true; \
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(object)->__val = (desired); \
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} else { \
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r = false; \
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*(expected) = __val; \
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} \
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__r; \
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})
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#define atomic_compare_exchange_weak_explicit(object, expected, desired, \
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success, failure) \
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atomic_compare_exchange_strong_explicit(object, expected, desired, \
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success, failure)
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#define atomic_exchange_explicit(object, desired, order) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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(object)->__val = (operand); \
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__v; \
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})
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#define atomic_fetch_add_explicit(object, operand, order) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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(object)->__val += (operand); \
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__v; \
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})
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#define atomic_fetch_and_explicit(object, operand, order) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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(object)->__val &= (operand); \
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__v; \
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})
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#define atomic_fetch_or_explicit(object, operand, order) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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(object)->__val |= (operand); \
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__v; \
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})
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#define atomic_fetch_sub_explicit(object, operand, order) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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(object)->__val -= (operand); \
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__v; \
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})
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#define atomic_fetch_xor_explicit(object, operand, order) \
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({ \
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__typeof__((object)->__val) __v = (object)->__val; \
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(object)->__val ^= (operand); \
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__v; \
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})
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#define atomic_load_explicit(object, order) ((object)->__val)
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#define atomic_store_explicit(object, desired, order) \
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({ (object)->__val = (desired); })
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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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memory_order_seq_cst, \
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memory_order_seq_cst)
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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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memory_order_seq_cst, \
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memory_order_seq_cst)
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#define atomic_exchange(object, desired) \
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atomic_exchange_explicit(object, desired, memory_order_seq_cst)
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#define atomic_fetch_add(object, operand) \
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atomic_fetch_add_explicit(object, operand, memory_order_seq_cst)
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#define atomic_fetch_and(object, operand) \
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atomic_fetch_and_explicit(object, operand, memory_order_seq_cst)
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#define atomic_fetch_or(object, operand) \
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atomic_fetch_or_explicit(object, operand, memory_order_seq_cst)
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#define atomic_fetch_sub(object, operand) \
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atomic_fetch_sub_explicit(object, operand, memory_order_seq_cst)
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#define atomic_fetch_xor(object, operand) \
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atomic_fetch_xor_explicit(object, operand, memory_order_seq_cst)
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#define atomic_load(object) atomic_load_explicit(object, memory_order_seq_cst)
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#define atomic_store(object, desired) \
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atomic_store_explicit(object, desired, memory_order_seq_cst)
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typedef atomic_bool atomic_flag;
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#define ATOMIC_FLAG_INIT ATOMIC_VAR_INIT(0)
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#define atomic_flag_clear_explicit(object, order) \
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atomic_store_explicit(object, 0, order)
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#define atomic_flag_test_and_set_explicit(object, order) \
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atomic_compare_exchange_strong_explicit(object, 0, 1, order, order)
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#define atomic_flag_clear(object) \
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atomic_flag_clear_explicit(object, memory_order_seq_cst)
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#define atomic_flag_test_and_set(object) \
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atomic_flag_test_and_set_explicit(object, memory_order_seq_cst)
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#endif
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