Namespaces
Variants
Views
Actions

std::latch::try_wait

From cppreference.com
< cpp‎ | thread‎ | latch
 
 
Concurrency support library
Threads
(C++11)
(C++20)
(C++20)
this_thread namespace
(C++11)
(C++11)
(C++11)
Mutual exclusion
(C++11)
(C++11)  
Generic lock management
(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
(C++11)
(C++11)
Condition variables
(C++11)
Semaphores
Latches and Barriers
(C++20)
(C++20)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
Safe Reclamation
(C++26)
(C++26)
Hazard Pointers

Atomic types
(C++11)
(C++20)
Initialization of atomic types
(C++11)(deprecated in C++20)
(C++11)(deprecated in C++20)
Memory ordering
Free functions for atomic operations
Free functions for atomic flags
 
 
bool try_wait() const noexcept;
(since C++20)

Returns true only if the internal counter has reached zero. This function may spuriously return false with very low probability even if the internal counter has reached zero.

[edit] Parameters

(none)

[edit] Return value

With very low probability false, otherwise cnt == 0, where cnt is the value of the internal counter.

[edit] Notes

The reason why a spurious result is permitted is to allow implementations to use a memory order more relaxed than std::memory_order_seq_cst.