std::atomic<T>::fetch_max
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std::atomic
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atomic::fetch_max
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member only of
atomic<Integral > specializationsT fetch_max( T arg, std::memory_order order =
std::memory_order_seq_cst ) noexcept;
(1)
(since C++26)
std::memory_order_seq_cst ) noexcept;
T fetch_max( T arg, std::memory_order order =
std::memory_order_seq_cst ) volatile noexcept;
(2)
(since C++26)
std::memory_order_seq_cst ) volatile noexcept;
member only of
atomic<T*> partial specializationT* fetch_max( T* arg, std::memory_order order =
std::memory_order_seq_cst ) noexcept;
(3)
(since C++26)
std::memory_order_seq_cst ) noexcept;
T* fetch_max( T* arg, std::memory_order order =
std::memory_order_seq_cst ) volatile noexcept;
(4)
(since C++26)
std::memory_order_seq_cst ) volatile noexcept;
Atomically replaces the current value with the result of std::max of the value and arg. That is, it performs atomic maximum operation. The operation is a read-modify-write operation. Memory is affected according to the value of order.
3,4) If the pointers point to different complete objects (or subobjects thereof), pointer comparison does not establish a strict weak ordering.
It is deprecated if std::atomic <T>::is_always_lock_free is false and overload (2) or (4) participates in overload resolution.
Contents
[edit] Parameters
arg
-
the other argument of std::max
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
This section is incomplete
Reason: no example
Reason: no example