std::atomic::is_lock_free
From cppreference.com
(since C++11) | ||
bool is_lock_free() const;
|
||
bool is_lock_free() const volatile;
|
||
Checks whether the atomic operations on all objects of this type are lock-free.
Contents |
[edit] Parameters
(none)
[edit] Return value
true if the atomic operations on the objects of this type are lock-free, false otherwise.
[edit] Notes
All atomic types except for std::atomic_flag may be implemented using mutexes or other locking operations, rather than using the lock-free atomic CPU instructions. Atomic types are also allowed to be sometimes lock-free, e.g. if only aligned memory accesses are naturally atomic on a given architecture, misaligned objects of the same type have to use locks.
The C++ standard recommends (but does not require) that lock-free atomic operations are also address-free, that is, suitable for communication between processes using shared memory.
[edit] Exceptions
noexcept specification:
noexcept
[edit] See also
(C++11)
|
checks if the atomic type's operations are lock-free (function template) |
[static] (C++17)
|
indicates that the type is always lock-free (public static member constant) |