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<html>
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<head>
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<title>pcre_assign_jit_stack specification</title>
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<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
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<h1>pcre_assign_jit_stack man page</h1>
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<p>
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Return to the <a href="index.html">PCRE index page</a>.
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</p>
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<p>
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This page is part of the PCRE HTML documentation. It was generated automatically
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from the original man page. If there is any nonsense in it, please consult the
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man page, in case the conversion went wrong.
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<br>
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<br><b>
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SYNOPSIS
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</b><br>
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<P>
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<b>#include <pcre.h></b>
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</P>
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<P>
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<b>void pcre_assign_jit_stack(pcre_extra *<i>extra</i>,</b>
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<b> pcre_jit_callback <i>callback</i>, void *<i>data</i>);</b>
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<br>
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<br>
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<b>void pcre16_assign_jit_stack(pcre16_extra *<i>extra</i>,</b>
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<b> pcre16_jit_callback <i>callback</i>, void *<i>data</i>);</b>
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<br>
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<br>
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<b>void pcre32_assign_jit_stack(pcre32_extra *<i>extra</i>,</b>
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<b> pcre32_jit_callback <i>callback</i>, void *<i>data</i>);</b>
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</P>
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<br><b>
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DESCRIPTION
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</b><br>
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<P>
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This function provides control over the memory used as a stack at run-time by a
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call to <b>pcre[16|32]_exec()</b> with a pattern that has been successfully
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compiled with JIT optimization. The arguments are:
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<pre>
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extra the data pointer returned by <b>pcre[16|32]_study()</b>
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callback a callback function
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data a JIT stack or a value to be passed to the callback
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function
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</PRE>
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</P>
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<P>
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If <i>callback</i> is NULL and <i>data</i> is NULL, an internal 32K block on
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the machine stack is used.
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</P>
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<P>
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If <i>callback</i> is NULL and <i>data</i> is not NULL, <i>data</i> must
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be a valid JIT stack, the result of calling <b>pcre[16|32]_jit_stack_alloc()</b>.
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</P>
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<P>
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If <i>callback</i> not NULL, it is called with <i>data</i> as an argument at
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the start of matching, in order to set up a JIT stack. If the result is NULL,
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the internal 32K stack is used; otherwise the return value must be a valid JIT
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stack, the result of calling <b>pcre[16|32]_jit_stack_alloc()</b>.
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</P>
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<P>
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You may safely assign the same JIT stack to multiple patterns, as long as they
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are all matched in the same thread. In a multithread application, each thread
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must use its own JIT stack. For more details, see the
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<a href="pcrejit.html"><b>pcrejit</b></a>
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page.
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</P>
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<P>
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There is a complete description of the PCRE native API in the
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<a href="pcreapi.html"><b>pcreapi</b></a>
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page and a description of the POSIX API in the
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<a href="pcreposix.html"><b>pcreposix</b></a>
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page.
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<p>
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Return to the <a href="index.html">PCRE index page</a>.
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</p>
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