|Quantity semaphores in which each thread may wait for an arbitrary
|General Quantity Semaphores
|A QSemN is a quantity semaphore, in which the available
"quantity" may be signalled or waited for in arbitrary amounts.
|Build a new QSemN with a supplied initial quantity.
The initial quantity must be at least 0.
|Wait for the specified quantity to become available
|Signal that a given quantity is now available from the QSemN.
|Produced by Haddock version 2.6.0|