126 lines
4.7 KiB
HTML
126 lines
4.7 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1999-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>The GNU Fortran Compiler: MCLOCK</title>
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<meta name="description" content="The GNU Fortran Compiler: MCLOCK">
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<meta name="keywords" content="The GNU Fortran Compiler: MCLOCK">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<link href="MCLOCK8.html#MCLOCK8" rel="next" title="MCLOCK8">
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<link href="MAXVAL.html#MAXVAL" rel="prev" title="MAXVAL">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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span.roman {font-family:serif; font-weight:normal}
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span.sansserif {font-family:sans-serif; font-weight:normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="MCLOCK"></a>
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<div class="header">
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<p>
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Next: <a href="MCLOCK8.html#MCLOCK8" accesskey="n" rel="next">MCLOCK8</a>, Previous: <a href="MAXVAL.html#MAXVAL" accesskey="p" rel="prev">MAXVAL</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="MCLOCK-_002d_002d_002d-Time-function"></a>
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<h3 class="section">9.184 <code>MCLOCK</code> — Time function</h3>
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<a name="index-MCLOCK"></a>
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<a name="index-time_002c-clock-ticks"></a>
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<a name="index-clock-ticks"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Returns the number of clock ticks since the start of the process, based
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on the function <code>clock(3)</code> in the C standard library.
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</p>
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<p>This intrinsic is not fully portable, such as to systems with 32-bit
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<code>INTEGER</code> types but supporting times wider than 32 bits. Therefore,
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the values returned by this intrinsic might be, or become, negative, or
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numerically less than previous values, during a single run of the
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compiled program.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>GNU extension
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>RESULT = MCLOCK()</code>
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</p>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>The return value is a scalar of type <code>INTEGER(4)</code>, equal to the
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number of clock ticks since the start of the process, or <code>-1</code> if
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the system does not support <code>clock(3)</code>.
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</p>
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</dd>
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<dt><em>See also</em>:</dt>
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<dd><p><a href="CTIME.html#CTIME">CTIME</a>, <a href="GMTIME.html#GMTIME">GMTIME</a>, <a href="LTIME.html#LTIME">LTIME</a>, <a href="#MCLOCK">MCLOCK</a>, <a href="TIME.html#TIME">TIME</a>
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</p>
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</dd>
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</dl>
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</body>
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</html>
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