base-4.4.1.0: Basic libraries

Portabilitynon-portable (concurrency)
Stabilityexperimental
Maintainerlibraries@haskell.org

Control.Concurrent.QSemN

Contents

Description

Quantity semaphores in which each thread may wait for an arbitrary "amount".

Synopsis

General Quantity Semaphores

data QSemN Source

A QSemN is a quantity semaphore, in which the available "quantity" may be signalled or waited for in arbitrary amounts.

Instances

newQSemN :: Int -> IO QSemNSource

Build a new QSemN with a supplied initial quantity. The initial quantity must be at least 0.

waitQSemN :: QSemN -> Int -> IO ()Source

Wait for the specified quantity to become available

signalQSemN :: QSemN -> Int -> IO ()Source

Signal that a given quantity is now available from the QSemN.