std::atomic_flag:: test

From cppreference.com
C++
Concurrency support library
Threads
(C++11)
(C++20)
(C++17) (C++17)
this_thread namespace
(C++11)
(C++11)
Cooperative cancellation
Mutual exclusion
Generic lock management
Condition variables
(C++11)
(C++11)
(C++11)
(C++11)
Semaphores
(C++20) (C++20)
Latches and Barriers
(C++20)
(C++20)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
(C++11)
Safe Reclamation
Hazard Pointers
(C++26)
(C++26)
(C++26)
Atomic types
(C++11)
(C++20)
(C++11)
Initialization of atomic types
(C++11) (deprecated in C++20)
(C++11) (deprecated in C++20)
(C++11)
Memory ordering
(C++11)
(C++11)
(C++11)
(C++11)
Free functions for atomic operations
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11) (C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++11) (C++11)
(C++26) (C++26)
(C++26) (C++26)
(C++11)
(C++20) (C++20)
(C++20)
(C++20)
Free functions for atomic flags
(C++11) (C++11)
(C++11) (C++11)
(C++20) (C++20)
(C++20) (C++20)
(C++20)
(C++20)
std::atomic_flag
bool test ( std:: memory_order order =
std:: memory_order_seq_cst ) const volatile noexcept ;
(1) (since C++20)
bool test ( std:: memory_order order =
std:: memory_order_seq_cst ) const noexcept ;
(2) (since C++20)

Atomically reads the value of the * this and returns the value.

If order is one of std:: memory_order_release and std:: memory_order_acq_rel , the behavior is undefined.

Parameters

order - the memory synchronization ordering

Return value

The value atomically read.

Example

This section is incomplete
Reason: no example

See also

(C++20) (C++20)
atomically returns the value of the flag
(function)
Retrieved from " https://en.cppreference.com/mwiki/index.php?title=cpp/atomic/atomic_flag/test&oldid=159555 "