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74 lines
2.9 KiB
HTML
74 lines
2.9 KiB
HTML
4 years ago
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Reentrancy (LIBM)</title>
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<meta name="description" content="Reentrancy (LIBM)">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
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<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="index.html#Top" rel="up" title="Top">
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<link href="Long-Double-Functions.html#Long-Double-Functions" rel="next" title="Long Double Functions">
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</head>
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<body lang="en">
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<a name="Reentrancy"></a>
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<div class="header">
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<p>
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Next: <a href="Long-Double-Functions.html#Long-Double-Functions" accesskey="n" rel="next">Long Double Functions</a>, Previous: <a href="Complex.html#Complex" accesskey="p" rel="prev">Complex</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Reentrancy-Properties-of-libm"></a>
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<h2 class="chapter">3 Reentrancy Properties of <code>libm</code></h2>
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<a name="index-reentrancy"></a>
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<a name="index-matherr-and-reentrancy"></a>
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<p>When a libm function detects an exceptional case, <code>errno</code> may be
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set.
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</p>
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<p><code>errno</code> is a macro which expands to the per-thread error value.
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This makes it thread safe, and therefore reentrant.
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</p>
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