semaphore module provides a general use
semaphore for synchronization.
This class represents a general counting semaphore as concieved by Edsger Dijkstra. As per Mesa type monitors however, "signal" has been replaced with "notify" to indicate that control is not transferred to the waiter when a notification is sent.
Initializes a semaphore object with the specified initial
|uint ||The initial
Wait until the current count is above zero, then atomically decrement the count by one and return.
Suspends the calling thread until the current count moves above zero or until the supplied time
period has elapsed. If the count moves above zero in this interval, then atomically decrement the count by one and return
true. Otherwise, return
|Duration ||The time to
periodmust be non-negative.
trueif notified before the timeout and
Atomically increment the current count by one. This will
notify one waiter, if there are any in the queue.
If the current count is equal to zero, return. Otherwise, atomically decrement the count by one and return
trueif the count was above zero and
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Licensed under the Boost License 1.0.