C++ Library - <atomic>

Introduction

These 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 and he atomic library provides components for fine-grained atomic operations allowing for lockless concurrent programming. Each atomic operation is indivisible with regards to any other atomic operation that involves the same object.

Atomic type

Sr.No.	Member types & Definition
1	atomic Atomic class template and specializations for bool, integral, and pointer types

C-style atomic types

The following are atomic types and also defined in this header.

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_least`N`_t`	`atomic_int_least`N`_t`
`uint_least`N`_t`	`atomic_uint_least`N`_t`
`int_fast`N`_t`	`atomic_int_fast`N`_t`
`uint_fast`N`_t`	`atomic_uint_fast`N`_t`
`intptr_t`	`atomic_intptr_t`
`uintptr_t`	`atomic_uintptr_t`
`size_t`	`atomic_size_t`
`ptrdiff_t`	`atomic_ptrdiff_t`

Introduction

Atomic type

C-style atomic types

Operations on atomic types

Flag type and operations