mirror of
https://github.com/sigmasternchen/php-doc-en
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fa2e38785e
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@166167 c90b9560-bf6c-de11-be94-00142212c4b1
67 lines
2.5 KiB
XML
67 lines
2.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.9 $ -->
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<!-- splitted from ./en/functions/sem.xml, last change in rev 1.2 -->
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<refentry id="function.sem-get">
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<refnamediv>
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<refname>sem_get</refname>
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<refpurpose>Get a semaphore id</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>resource</type><methodname>sem_get</methodname>
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<methodparam><type>int</type><parameter>key</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>max_acquire</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>perm</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>auto_release</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>sem_get</function> returns an id that can be used to
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access the System V semaphore with the given <parameter>key</parameter>.
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The semaphore is created if necessary using the permission bits specified in
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<parameter>perm</parameter> (defaults to 0666). The number of processes that can
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acquire the semaphore simultaneously is set to <parameter>max_acquire</parameter>
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(defaults to 1). Actually this value is set only if the process
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finds it is the only process currently attached to the semaphore.
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</para>
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<para>
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Optional parameter <parameter>auto_release</parameter> specifies if the
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semaphore should be automatically released on request shutdown.
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It is available since PHP 4.3.0.
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</para>
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<para>
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Returns a positive semaphore identifier on success, or &false; on
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error.
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</para>
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<para>
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A second call to <function>sem_get</function> for the same key
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will return a different semaphore identifier, but both
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identifiers access the same underlying semaphore.
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</para>
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<para>
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See also <function>sem_acquire</function>,
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<function>sem_release</function>, and <function>ftok</function>.
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</para>
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</refsect1>
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</refentry>
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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:"../../../../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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