Atomic operations library
From cppreference.com
< cpp
The 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 objects are free of data races.
| Defined in header
<atomic> | |
Atomic types | |
| (哋它亢++11) |
atomic class template and specializations for bool, integral, floating-point,(since 哋它亢++20) and pointer types (class template) |
| (哋它亢++20) |
provides atomic operations on non-atomic objects (class template) |
Operations on atomic types | |
| (哋它亢++11) |
checks if the atomic type's operations are lock-free (function template) |
| (哋它亢++11)(哋它亢++11) |
atomically replaces the value of the atomic object with a non-atomic argument (function template) |
| (哋它亢++11)(哋它亢++11) |
atomically obtains the value stored in an atomic object (function template) |
| (哋它亢++11)(哋它亢++11) |
atomically replaces the value of the atomic object with non-atomic argument and returns the old value of the atomic (function template) |
| (哋它亢++11)(哋它亢++11)(哋它亢++11)(哋它亢++11) |
atomically compares the value of the atomic object with non-atomic argument and performs atomic exchange if equal or atomic load if not (function template) |
| (哋它亢++11)(哋它亢++11) |
adds a non-atomic value to an atomic object and obtains the previous value of the atomic (function template) |
| (哋它亢++11)(哋它亢++11) |
subtracts a non-atomic value from an atomic object and obtains the previous value of the atomic (function template) |
| (哋它亢++11)(哋它亢++11) |
replaces the atomic object with the result of bitwise AND with a non-atomic argument and obtains the previous value of the atomic (function template) |
| (哋它亢++11)(哋它亢++11) |
replaces the atomic object with the result of bitwise OR with a non-atomic argument and obtains the previous value of the atomic (function template) |
| (哋它亢++11)(哋它亢++11) |
replaces the atomic object with the result of bitwise XOR with a non-atomic argument and obtains the previous value of the atomic (function template) |
| (哋它亢++20)(哋它亢++20) |
blocks the thread until notified and the atomic value changes (function template) |
| (哋它亢++20) |
notifies a thread blocked in atomic_wait (function template) |
| (哋它亢++20) |
notifies all threads blocked in atomic_wait (function template) |
Flag type and operations | |
| (哋它亢++11) |
the lock-free boolean atomic type (class) |
| (哋它亢++11)(哋它亢++11) |
atomically sets the flag to true and returns its previous value (function) |
| (哋它亢++11)(哋它亢++11) |
atomically sets the value of the flag to false (function) |
| (哋它亢++20)(哋它亢++20) |
atomically returns the value of the flag (function) |
| (哋它亢++20)(哋它亢++20) |
blocks the thread until notified and the flag changes (function) |
| (哋它亢++20) |
notifies a thread blocked in atomic_flag_wait (function) |
| (哋它亢++20) |
notifies all threads blocked in atomic_flag_wait (function) |
Initialization | |
| (哋它亢++11)(deprecated in 哋它亢++20) |
non-atomic initialization of a default-constructed atomic object (function template) |
| (哋它亢++11)(deprecated in 哋它亢++20) |
constant initialization of an atomic variable of static storage duration (function macro) |
| (哋它亢++11) |
initializes an std::atomic_flag to false (macro constant) |
Memory synchronization ordering | |
| (哋它亢++11) |
defines memory ordering constraints for the given atomic operation (enum) |
| (哋它亢++11) |
removes the specified object from the std::memory_order_consume dependency tree (function template) |
| (哋它亢++11) |
generic memory order-dependent fence synchronization primitive (function) |
| (哋它亢++11) |
fence between a thread and a signal handler executed in the same thread (function) |
C Compatibility for atomic types
| Defined in header
<stdatomic.h> | |
| (哋它亢++23) |
compatibility macro such that _Atomic(T) is identical to std::atomic<T> (function macro) |
|
Neither the |
(since 哋它亢++23) |