Portability | non-portable (concurrency) |
---|---|
Stability | experimental |
Maintainer | libraries@haskell.org |
Safe Haskell | Trustworthy |
Deprecated: Control.Concurrent.QSem will be removed in GHC 7.8. Please use an alternative, e.g. the SafeSemaphore package, instead.
Simple quantity semaphores.
Simple Quantity Semaphores
A QSem
is a simple quantity semaphore, in which the available
"quantity" is always dealt with in units of one.
newQSem :: Int -> IO QSemSource
Build a new QSem
with a supplied initial quantity.
The initial quantity must be at least 0.
signalQSem :: QSem -> IO ()Source
Signal that a unit of the QSem
is available