std::latch::count_down
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std::latch
Member functions
latch::count_down
Constants
void count_down( std::ptrdiff_t n = 1 );
(since C++20)
Atomically decrements the internal counter by n without blocking the caller.
If n is greater than the value of the internal counter or is negative, the behavior is undefined.
This operation strongly happens-before all calls that are unblocked on this latch.
[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.