Modulelifted-base-0.2.3.12

Control.Concurrent.QSem.Lifted

1 type
3 values

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

valuenewQSem :: MonadBase IO m => Int -> m QSem

valuesignalQSem :: MonadBase IO m => QSem -> m ()

valuewaitQSem :: MonadBase IO m => QSem -> m ()

newtypenewtype QSem

QSem is a quantity semaphore in which the resource is acquired and released in units of one. It provides guaranteed FIFO ordering for satisfying blocked waitQSem calls.

The pattern

bracket_ waitQSem signalQSem (...)

is safe; it never loses a unit of the resource.