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This header providesatomic operations, in particular, it's a part of theconcurrency support library.
Contents |
Operations on atomic types | |
| indicates that the given atomic type is lock-free (macro constant)[edit] | |
(C11) | indicates whether the atomic object is lock-free (function)[edit] |
| stores a value in an atomic object (function)[edit] | |
| reads a value from an atomic object (function)[edit] | |
| swaps a value with the value of an atomic object (function)[edit] | |
| swaps a value with an atomic object if the old value is what is expected, otherwise reads the old value (function)[edit] | |
| atomic addition (function)[edit] | |
| atomic subtraction (function)[edit] | |
| atomic bitwise OR (function)[edit] | |
| atomic bitwise exclusive OR (function)[edit] | |
| atomic bitwise AND (function)[edit] | |
Flag type and operations | |
(C11) | lock-free atomic boolean flag (struct)[edit] |
| sets an atomic_flag to true and returns the old value (function)[edit] | |
| sets an atomic_flag to false (function)[edit] | |
Initialization | |
(C11) | initializes an existing atomic object (function)[edit] |
(C11)(deprecated in C17)(removed in C23) | initializes a new atomic object (function macro)[edit] |
(C11) | initializes a newatomic_flag (macro constant)[edit] |
Memory synchronization ordering | |
(C11) | defines memory ordering constraints (enum)[edit] |
(C11) | breaks a dependency chain formemory_order_consume (function macro)[edit] |
(C11) | generic memory order-dependent fence synchronization primitive (function)[edit] |
(C11) | fence between a thread and a signal handler executed in the same thread (function)[edit] |
Convenience type aliases | |
| Typedef name | Full type name |
atomic_bool(C11) | _Atomic _Bool |
atomic_char(C11) | _Atomicchar |
atomic_schar(C11) | _Atomicsignedchar |
atomic_uchar(C11) | _Atomicunsignedchar |
atomic_short(C11) | _Atomicshort |
atomic_ushort(C11) | _Atomicunsignedshort |
atomic_int(C11) | _Atomicint |
atomic_uint(C11) | _Atomicunsignedint |
atomic_long(C11) | _Atomiclong |
atomic_ulong(C11) | _Atomicunsignedlong |
atomic_llong(C11) | _Atomiclonglong |
atomic_ullong(C11) | _Atomicunsignedlonglong |
atomic_char8_t(C23) | _Atomic char8_t |
atomic_char16_t(C11) | _Atomic char16_t |
atomic_char32_t(C11) | _Atomic char32_t |
atomic_wchar_t(C11) | _Atomicwchar_t |
atomic_int_least8_t(C11) | _Atomicint_least8_t |
atomic_uint_least8_t(C11) | _Atomicuint_least8_t |
atomic_int_least16_t(C11) | _Atomicint_least16_t |
atomic_uint_least16_t(C11) | _Atomicuint_least16_t |
atomic_int_least32_t(C11) | _Atomicint_least32_t |
atomic_uint_least32_t(C11) | _Atomicuint_least32_t |
atomic_int_least64_t(C11) | _Atomicint_least64_t |
atomic_uint_least64_t(C11) | _Atomicuint_least64_t |
atomic_int_fast8_t(C11) | _Atomicint_fast8_t |
atomic_uint_fast8_t(C11) | _Atomicuint_fast8_t |
atomic_int_fast16_t(C11) | _Atomicint_fast16_t |
atomic_uint_fast16_t(C11) | _Atomicuint_fast16_t |
atomic_int_fast32_t(C11) | _Atomicint_fast32_t |
atomic_uint_fast32_t(C11) | _Atomicuint_fast32_t |
atomic_int_fast64_t(C11) | _Atomicint_fast64_t |
atomic_uint_fast64_t(C11) | _Atomicuint_fast64_t |
atomic_intptr_t(C11) | _Atomicintptr_t |
atomic_uintptr_t(C11) | _Atomicuintptr_t |
atomic_size_t(C11) | _Atomicsize_t |
atomic_ptrdiff_t(C11) | _Atomicptrdiff_t |
atomic_intmax_t(C11) | _Atomicintmax_t |
atomic_uintmax_t(C11) | _Atomicuintmax_t |
| This section is incomplete Reason: add more from 7.17 Atomics <stdatomic.h> and B.16 Atomics <stdatomic.h> |
#define __STDC_VERSION_STDATOMIC_H__ 202311L voidatomic_init(volatile A* obj,/*C*/ value);/*type*/kill_dependency(/*type*/ y);voidatomic_thread_fence(memory_order order);voidatomic_signal_fence(memory_order order);boolatomic_is_lock_free(constvolatile A* obj);voidatomic_store(volatile A* object,/*C*/ desired);voidatomic_store_explicit(volatile A* object,/*C*/ desired,memory_order order);/*C*/atomic_load(constvolatile A* object);/*C*/atomic_load_explicit(constvolatile A* object,memory_order order);/*C*/atomic_exchange(volatile A* object,/*C*/ desired);/*C*/atomic_exchange_explicit(volatile A* object,/*C*/ desired,memory_order order);boolatomic_compare_exchange_strong(volatile A* object,/*C*/* expected,/*C*/ desired);boolatomic_compare_exchange_strong_explicit(volatile A* object,/*C*/* expected,/*C*/ desired,memory_order success,memory_order failure);boolatomic_compare_exchange_weak(volatile A* object,/*C*/* expected,/*C*/ desired);boolatomic_compare_exchange_weak_explicit(volatile A* object,/*C*/* expected,/*C*/ desired,memory_order success,memory_order failure);/*C*//*atomic_fetch_key*/(volatile A* object, M operand);/*C*//*atomic_fetch_key_explicit*/(volatile A* object, M operand,memory_order order);boolatomic_flag_test_and_set(volatileatomic_flag* object);boolatomic_flag_test_and_set_explicit(volatileatomic_flag* object,memory_order order);voidatomic_flag_clear(volatileatomic_flag* object);voidatomic_flag_clear_explicit(volatileatomic_flag* object,memory_order order);
