std::atomic<T>::is_always_lock_free

 

C++

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Atomic operations library

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atomic (C++11)

atomic_ref (C++20)

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atomic_storeatomic_store_explicit (C++11)(C++11)

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atomic_fetch_addatomic_fetch_add_explicit (C++11)(C++11)

atomic_fetch_subatomic_fetch_sub_explicit (C++11)(C++11)

atomic_fetch_andatomic_fetch_and_explicit (C++11)(C++11)

atomic_fetch_oratomic_fetch_or_explicit (C++11)(C++11)

atomic_fetch_xoratomic_fetch_xor_explicit (C++11)(C++11)

atomic_is_lock_free (C++11)

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std::atomic

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atomic::is_lock_free

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atomic::is_always_lock_free (C++17)

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atomic::operator++atomic::operator++(int)atomic::operator--atomic::operator--(int)

atomic::operator+=atomic::operator-=atomic::operator&=atomic::operator|=atomic::operator^=

 

static constexpr bool is_always_lock_free = /*implementation-defined*/;		(since C++17)

Equals true if this atomic type is always lock-free and false if it is never or sometimes lock-free.

The value of this constant is consistent with both the macro ATOMIC_xxx_LOCK_FREE, where defined, with the member function is_lock_free and non-member function std::atomic_is_lock_free.

Notes

There is no non-member function equivalent of this static member constant because non-member functions take pointers to atomic types, and therefore aren't as useful in constant expressions.

See also

is_lock_free	checks if the atomic object is lock-free (public member function)
atomic_is_lock_free (C++11)	checks if the atomic type's operations are lock-free (function template)