Modulelifted-base-0.2.3.12

Control.Concurrent.QSemN.Lifted

1 type
3 values

Packagelifted-base-0.2.3.12
Exports4
LicenceBSD-3-Clause
SourceQSemN.hs

valuenewQSemN :: MonadBase IO m => Int -> m QSemN

valuesignalQSemN :: MonadBase IO m => QSemN -> Int -> m ()

valuewaitQSemN :: MonadBase IO m => QSemN -> Int -> m ()

datadata QSemN

QSemN is a quantity semaphore in which the resource is acquired and released in arbitrary amounts. It provides guaranteed FIFO ordering for satisfying blocked waitQSemN calls.

The pattern

bracket_ (waitQSemN n) (signalQSemN n) (...)

is safe; it never loses any of the resource.