[thread.latch.general] (original) (raw)

32 Concurrency support library [thread]

32.9 Coordination types [thread.coord]

32.9.2 Latches [thread.latch]

32.9.2.1 General [thread.latch.general]

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A latch is a thread coordination mechanism that allows any number of threads to block until an expected number of threads arrive at the latch (via the count_down function).

The expected count is set when the latch is created.

An individual latch is a single-use object; once the expected count has been reached, the latch cannot be reused.