std::latch::arrive_and_wait
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std::latch
Member functions
latch::arrive_and_wait
Constants
void arrive_and_wait( std::ptrdiff_t n = 1 );
(since C++20)
Atomically decrements the internal counter by n and (if necessary) blocks the calling thread until the counter reaches zero. Equivalent to count_down(n); wait();.
If n is greater than the value of the internal counter or is negative, the behavior is undefined.
[edit] Parameters
n
-
the value by which the internal counter is decreased
[edit] Return value
(none)
[edit] Exceptions
Throws std::system_error with an error code allowed for mutex types on error.