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std::atomic_ref<T>::fetch_min

From cppreference.com
< cpp‎ | atomic‎ | atomic ref
 
 
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member only of atomic_ref<Integral > specializations
T fetch_min( T arg, std::memory_order order =
                        std::memory_order_seq_cst ) const noexcept;
(1) (since C++26)
member only of atomic_ref<T*> partial specialization
T* fetch_min( T* arg, std::memory_order order =
                          std::memory_order_seq_cst ) const noexcept;
(2) (since C++26)

Atomically replaces the current value of the referenced object with the result of std::min of the value and arg. That is, it performs atomic minimum operation. The operation is a read-modify-write operation. Memory is affected according to the value of order.

2) If the pointers point to different complete objects (or subobjects thereof), pointer comparison does not establish a strict weak ordering.

Contents

[edit] Parameters

arg - the other argument of std::min
order - memory order constraints to enforce

[edit] Return value

The value immediately preceding the effects of this function in the modification order of *this.

[edit] Notes

Feature-test macro Value Std Feature
__cpp_lib_atomic_min_max 202403L (C++26) Atomic minimum/maximum

[edit] Example