[header][Multi-threading] atomic (C++11)

*[header][Multi-threading] atomic (C++11)

<atomic>

Atomic

Atomic types are types that encapsulate a value whose access is guaranteed to not cause data races and can be used to synchronize memory accesses among different threads.

This header declares two C++ classes, atomic and atomic_flag, that implement all the features of atomic types in self-contained classes. The header also declares an entire set of C-style types and functions compatible with the atomic support in C.

Classes

atomic

Atomic (class template )

atomic_flag

Atomic flag (class )

Types

memory_order

Memory order (enum )

C-style atomic types

The following atomic types are also defined in this header; each with the same behavior as the respective instantiation of atomic for the listed contained type.

contained type	atomic type	description
bool	atomic_bool
char	atomic_char	atomics for fundamental integral types. These are either typedefs of the corresponding full specialization of the atomic class template or a base class of such specialization.
signed char	atomic_schar
unsigned char	atomic_uchar
short	atomic_short
unsigned short	atomic_ushort
int	atomic_int
unsigned int	atomic_uint
long	atomic_long
unsigned long	atomic_ulong
long long	atomic_llong
unsigned long long	atomic_ullong
wchar_t	atomic_wchar_t
char16_t	atomic_char16_t
char32_t	atomic_char32_t
intmax_t	atomic_intmax_t	atomics for width-based integrals (those defined in <cinttypes>). Each of these is either an alias of one of the above atomics for fundamental integral types or of a full specialization of the atomic class template with an extended integral type. Where N is one in 8, 16, 32, 64, or any other type width supported by the library.
uintmax_t	atomic_uintmax_t
int_leastN_t	atomic_int_leastN_t
uint_leastN_t	atomic_uint_leastN_t
int_fastN_t	atomic_int_fastN_t
uint_fastN_t	atomic_uint_fastN_t
intptr_t	atomic_intptr_t
uintptr_t	atomic_uintptr_t
size_t	atomic_size_t
ptrdiff_t	atomic_ptrdiff_t

Functions

kill_dependency

Kill dependency (function )

atomic_thread_fence

Thread fence (function )

atomic_signal_fence

Signal fence (function )

Functions for atomic objects (C-style)

atomic_is_lock_free

Is lock-free (function )

atomic_init

Initialize atomic object (function )

atomic_store

Modify contained value (function )

atomic_store_explicit

Modify contained value (explicit memory order) (function )

atomic_load

Read contained value (function )

atomic_load_explicit

Read contained value (explicit memory order) (function )

atomic_exchange

Read and modify contained value (function )

atomic_exchange_explicit

Read and modify contained value (explicit memory order) (function )

atomic_compare_exchange_weak

Compare and exchange contained value (weak) (function )

atomic_compare_exchange_weak_explicit

Compare and exchange contained value (weak, explicit) (function )

atomic_compare_exchange_strong

Compare and exchange contained value (strong) (function )

atomic_compare_exchange_strong_explicit

Compare and exchange contained value (strong, explicit) (function )

atomic_fetch_add

Add to contained value (function )

atomic_fetch_add_explicit

Add to contained value (explicit memory order) (function )

atomic_fetch_sub

Subtract from contained value (function )

atomic_fetch_sub_explicit

Subtract from contained value (explicit memory order) (function )

atomic_fetch_and

Apply bitwise AND to contained value (function )

atomic_fetch_and_explicit

Apply bitwise AND to contained value (explicit memory order) (function )

atomic_fetch_or

Apply bitwise OR to contained value (function )

atomic_fetch_or_explicit

Apply bitwise OR to contained value (explicit memory order) (function )

atomic_fetch_xor

Apply bitwise XOR to contained value (function )

atomic_fetch_xor_explicit

Apply bitwise XOR to contained value (explicit memory order) (function )

Functions for atomic flags (C-style)

atomic_flag_test_and_set

Test and set atomic flag (function )

atomic_flag_test_and_set_explicit

Test and set atomic flag (explicit memory order) (function )

atomic_flag_clear

Clear atomic flag (function )

atomic_flag_clear_explicit

Clear atomic flag (explicit memory order) (function )

Macro functions

ATOMIC_VAR_INIT

Initialization of atomic variable (macro )

ATOMIC_FLAG_INIT

Initialization of atomic flag (macro )

Macro constants

macro	relative to types	defined as
ATOMIC_BOOL_LOCK_FREE	bool	0 if the types are never lock-free. 1 it the types are sometimes lock-free. 2 if the types are always lock-free. Consistent with the value returned by atomic::is_lock_free.
ATOMIC_CHAR_LOCK_FREE	char  signed char  unsigned char
ATOMIC_SHORT_LOCK_FREE	short  unsigned short
ATOMIC_INT_LOCK_FREE	int  unsigned int
ATOMIC_LONG_LOCK_FREE	long  unsigned long
ATOMIC_LLONG_LOCK_FREE	long long  unsigned long long
ATOMIC_WCHAR_T_LOCK_FREE	wchar_t
ATOMIC_CHAR16_T_LOCK_FREE	char16_t
ATOMIC_CHAR32_T_LOCK_FREE	char32_t
ATOMIC_POINTER_LOCK_FREE	U*  (for any type U)

내용 출처 : http://www.cplusplus.com/reference/atomic/