<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Control.Concurrent.QSem</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
window.onload = function () {pageLoad();setSynopsis("mini_Control-Concurrent-QSem.html");};
//]]>
</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">base-4.5.1.0: Basic libraries</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Portability</th><td>non-portable (concurrency)</td></tr><tr><th>Stability</th><td>experimental</td></tr><tr><th>Maintainer</th><td>libraries@haskell.org</td></tr><tr><th>Safe Haskell</th><td>Trustworthy</td></tr></table><p class="caption">Control.Concurrent.QSem</p></div><div id="table-of-contents"><p class="caption">Contents</p><ul><li><a href="#g:1">Simple Quantity Semaphores
</a></li></ul></div><div id="description"><p class="caption">Description</p><div class="doc"><p>Simple quantity semaphores.
</p></div></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><span class="keyword">data</span> <a href="#t:QSem">QSem</a> </li><li class="src short"><a href="#v:newQSem">newQSem</a> :: <a href="Data-Int.html#t:Int">Int</a> -> <a href="System-IO.html#t:IO">IO</a> <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></li><li class="src short"><a href="#v:waitQSem">waitQSem</a> :: <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a> -> <a href="System-IO.html#t:IO">IO</a> <a href="../ghc-prim-0.2.0.0/GHC-Tuple.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:signalQSem">signalQSem</a> :: <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a> -> <a href="System-IO.html#t:IO">IO</a> <a href="../ghc-prim-0.2.0.0/GHC-Tuple.html#t:-40--41-">()</a></li></ul></div><div id="interface"><h1 id="g:1">Simple Quantity Semaphores
</h1><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:QSem" class="def">QSem</a> </p><div class="doc"><p>A <code><a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></code> is a simple quantity semaphore, in which the available
"quantity" is always dealt with in units of one.
</p></div><div class="subs instances"><p id="control.i:QSem" class="caption collapser" onclick="toggleSection('i:QSem')">Instances</p><div id="section.i:QSem" class="show"><table><tr><td class="src"><a href="Data-Eq.html#t:Eq">Eq</a> <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="Data-Typeable-Internal.html#t:Typeable">Typeable</a> <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:newQSem" class="def">newQSem</a> :: <a href="Data-Int.html#t:Int">Int</a> -> <a href="System-IO.html#t:IO">IO</a> <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></p><div class="doc"><p>Build a new <code><a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></code> with a supplied initial quantity.
The initial quantity must be at least 0.
</p></div></div><div class="top"><p class="src"><a name="v:waitQSem" class="def">waitQSem</a> :: <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a> -> <a href="System-IO.html#t:IO">IO</a> <a href="../ghc-prim-0.2.0.0/GHC-Tuple.html#t:-40--41-">()</a></p><div class="doc"><p>Wait for a unit to become available
</p></div></div><div class="top"><p class="src"><a name="v:signalQSem" class="def">signalQSem</a> :: <a href="Control-Concurrent-QSem.html#t:QSem">QSem</a> -> <a href="System-IO.html#t:IO">IO</a> <a href="../ghc-prim-0.2.0.0/GHC-Tuple.html#t:-40--41-">()</a></p><div class="doc"><p>Signal that a unit of the <code><a href="Control-Concurrent-QSem.html#t:QSem">QSem</a></code> is available
</p></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.11.0</p></div></body></html>
distrib
>
Mageia
>
5
>
i586
>
media
>
core-release
>
by-pkgid
>
6e204a966e8c42d976f99a1700ce5f20
>
files
>
2217
