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android-kvm / toolchains / linux-x86 / gcc / c588ecff793814a1dcc41379e41d09c476b937ce / . / aarch64-linux-gnu-5.1 / share / doc / gfortran / MCLOCK.html
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24<title>The GNU Fortran Compiler: MCLOCK</title>
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71<a name="MCLOCK"></a>
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73<p>
74Next: <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> &nbsp; [<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>
75</div>
76<hr>
77<a name="MCLOCK-_002d_002d_002d-Time-function"></a>
78<h3 class="section">9.183 <code>MCLOCK</code> &mdash; Time function</h3>
79<a name="index-MCLOCK"></a>
80<a name="index-time_002c-clock-ticks"></a>
81<a name="index-clock-ticks"></a>
82
83<dl compact="compact">
84<dt><em>Description</em>:</dt>
85<dd><p>Returns the number of clock ticks since the start of the process, based
86on the function <code>clock(3)</code> in the C standard library.
87</p>
88<p>This intrinsic is not fully portable, such as to systems with 32-bit
89<code>INTEGER</code> types but supporting times wider than 32 bits. Therefore,
90the values returned by this intrinsic might be, or become, negative, or
91numerically less than previous values, during a single run of the
92compiled program.
93</p>
94</dd>
95<dt><em>Standard</em>:</dt>
96<dd><p>GNU extension
97</p>
98</dd>
99<dt><em>Class</em>:</dt>
100<dd><p>Function
101</p>
102</dd>
103<dt><em>Syntax</em>:</dt>
104<dd><p><code>RESULT = MCLOCK()</code>
105</p>
106</dd>
107<dt><em>Return value</em>:</dt>
108<dd><p>The return value is a scalar of type <code>INTEGER(4)</code>, equal to the
109number of clock ticks since the start of the process, or <code>-1</code> if
110the system does not support <code>clock(3)</code>.
111</p>
112</dd>
113<dt><em>See also</em>:</dt>
114<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>
115</p>
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118
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