C Library Header – stdatomic

<stdatomic.h> header is for atomic operations on data shared between threads.

The <stdatomic.h> header shall define the following macro constants:

ATOMIC_FLAG_INIT	initializes a new atomic_flag (C11)
ATOMIC_VAR_INIT	initializes a new atomic object (C11)
ATOMIC_BOOL_LOCK_FREE ATOMIC_CHAR_LOCK_FREE ATOMIC_CHAR16_T_LOCK_FREE ATOMIC_CHAR32_T_LOCK_FREE ATOMIC_WCHAR_T_LOCK_FREE ATOMIC_SHORT_LOCK_FREE ATOMIC_INT_LOCK_FREE ATOMIC_LONG_LOCK_FREE ATOMIC_LLONG_LOCK_FREE ATOMIC_POINTER_LOCK_FREE	indicates that the given atomic type is lock-free (C11)
kill_dependency	breaks a dependency chain for memory_order_consume (C11)

The <stdatomic.h> header shall define the following functions:

atomic_flag_test_and_set atomic_flag_test_and_set_explicit	sets an atomic_flag to true and returns the old value (C11)
atomic_flag_clear atomic_flag_clear_explicit	sets an atomic_flag to false (C11)
atomic_init	initializes an existing atomic object (C11)
atomic_is_lock_free	indicates whether the atomic object is lock-free (C11)
atomic_store atomic_store_explicit	stores a value in an atomic object (C11)
atomic_load atomic_load_explicit	reads a value from an atomic object (C11)
atomic_exchange atomic_exchange_explicit	swaps a value with the value of an atomic object (C11)
atomic_compare_exchange_strong atomic_compare_exchange_strong_explicit atomic_compare_exchange_weak atomic_compare_exchange_weak_explicit	swaps a value with the an atomic object if the old value is what is expected, otherwise reads the old value (C11)
atomic_fetch_add atomic_fetch_add_explicit	atomic addition (C11)
atomic_fetch_sub atomic_fetch_sub_explicit	atomic subtraction (C11)
atomic_fetch_or atomic_fetch_or_explicit	atomic logical OR (C11)
atomic_fetch_xor atomic_fetch_xor_explicit	atomic logical exclusive OR (C11)
atomic_fetch_and atomic_fetch_and_explicit	atomic logical AND (C11)
atomic_thread_fence	generic memory order-dependent fence synchronization primitive (C11)
atomic_signal_fence	fence between a thread and a signal handler executed in the same thread (C11)

The <stdatomic.h> header shall define the following type:

memory_order	defines memory ordering constraints (enum) (C11)
atomic_flag	lock-free atomic boolean flag (struct)(C11)
atomic_bool atomic_char atomic_schar atomic_uchar atomic_short atomic_ushort atomic_int atomic_uint atomic_long atomic_ulong atomic_llong atomic_ullong atomic_char16_t atomic_char32_t atomic_wchar_t atomic_int_least8_t atomic_uint_least8_t atomic_int_least16_t atomic_uint_least16_t atomic_int_least32_t atomic_uint_least32_t atomic_int_least64_t atomic_uint_least64_t atomic_int_fast8_t atomic_uint_fast8_t atomic_int_fast16_t atomic_uint_fast16_t atomic_int_fast32_t atomic_uint_fast32_t atomic_int_fast64_t atomic_uint_fast64_t atomic_intptr_t atomic_uintptr_t atomic_size_t atomic_ptrdiff_t atomic_intmax_t atomic_uintmax_t	Data type’s(C11)

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Related topics:
<setjmp.h>   |   <signal.h>   |   <stdalign.h>   |   <stdarg.h>   |   <stdbool.h>   |   Standard Library in C

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