| Portability | non-portable (concurrency) |
|---|---|
| Stability | experimental |
| Maintainer | libraries@haskell.org |
| Safe Haskell | Trustworthy |
Control.Concurrent.QSem
Contents
Description
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