mirror of
https://github.com/sigmasternchen/php-doc-en
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d9ecfba6ad
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@347824 c90b9560-bf6c-de11-be94-00142212c4b1
130 lines
4.8 KiB
XML
130 lines
4.8 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<phpdoc:classref xml:id="class.parallel-channel" xmlns:phpdoc="http://php.net/ns/phpdoc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
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<title>The parallel\Channel class</title>
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<titleabbrev>parallel\Channel</titleabbrev>
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<partintro>
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<section>
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<title>Unbuffered Channels</title>
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<para>
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An unbuffered channel will block on calls to <methodname>parallel\Channel::send</methodname> until there is a receiver, and block on calls to
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<methodname>parallel\Channel::recv</methodname> until there is a sender. This means an unbuffered channel is not only a way to share data among tasks
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but also a simple method of synchronization.
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</para>
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<para>
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An unbuffered channel is the fastest way to share data among tasks, requiring the least copying.
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</para>
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</section>
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<section>
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<title>Buffered Channels</title>
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<para>
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A buffered channel will not block on calls to <methodname>parallel\Channel::send</methodname> until capacity is reached, calls to
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<methodname>parallel\Channel::recv</methodname> will block until there is data in the buffer.
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</para>
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</section>
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<section>
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<title>Closures over Channels</title>
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<para>
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A powerful feature of parallel channels is that they allow the exchange of closures between tasks (and runtimes).
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</para>
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<para>
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When a closure is sent over a channel the closure is buffered, it doesn't change the buffering of the channel transmitting the closure,
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but it does effect the static scope inside the closure: The same closure sent to different runtimes, or the same runtime,
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will not share their static scope.
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</para>
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<para>
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This means that whenever a closure is executed that was transmitted by a channel, static state will be as it was when the closure was buffered.
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</para>
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</section>
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<section>
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<title>Anonymous Channels</title>
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<para>
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The anonymous channel constructor allows the programmer to avoid assigning names to every channel: parallel will generate a unique name for anonymous
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channels.
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</para>
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</section>
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<section xml:id="parallel-channel.synopsis">
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&reftitle.classsynopsis;
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<!-- {{{ Synopsis -->
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<classsynopsis>
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<ooclass><classname>parallel\Channel</classname></ooclass>
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<!-- {{{ Class synopsis -->
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<classsynopsisinfo>
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<ooclass>
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<modifier>final</modifier>
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<classname>parallel\Channel</classname>
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</ooclass>
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</classsynopsisinfo>
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<!-- }}} -->
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<classsynopsisinfo role="comment">Anonymous Constructor</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.parallel-channel')/db:refentry/db:refsect1[@audience='anonymous']/descendant::db:methodsynopsis[not(@role='procedural')])">
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<xi:fallback />
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</xi:include>
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<classsynopsisinfo role="comment">Access</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.parallel-channel')/db:refentry/db:refsect1[@audience='access']/descendant::db:methodsynopsis[not(@role='procedural')])">
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<xi:fallback />
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</xi:include>
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<classsynopsisinfo role="comment">Sharing</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.parallel-channel')/db:refentry/db:refsect1[@audience='sharing']/descendant::db:methodsynopsis[not(@role='procedural')])">
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<xi:fallback />
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</xi:include>
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<classsynopsisinfo role="comment">Closing</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.parallel-channel')/db:refentry/db:refsect1[@audience='close']/descendant::db:methodsynopsis[not(@role='procedural')])">
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<xi:fallback />
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</xi:include>
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<classsynopsisinfo role="comment">Constant for Infinitely Buffered</classsynopsisinfo>
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<fieldsynopsis>
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<modifier>const</modifier>
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<varname>Infinite</varname>
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</fieldsynopsis>
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</classsynopsis>
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<!-- }}} -->
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</section>
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</partintro>
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&reference.parallel.parallel.channel.construct;
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&reference.parallel.parallel.channel.make;
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&reference.parallel.parallel.channel.open;
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&reference.parallel.parallel.channel.recv;
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&reference.parallel.parallel.channel.send;
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&reference.parallel.parallel.channel.close;
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</phpdoc:classref>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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