1<html> 2<head> 3<title>pcre2_jit_stack_assign specification</title> 4</head> 5<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB"> 6<h1>pcre2_jit_stack_assign man page</h1> 7<p> 8Return to the <a href="index.html">PCRE2 index page</a>. 9</p> 10<p> 11This page is part of the PCRE2 HTML documentation. It was generated 12automatically from the original man page. If there is any nonsense in it, 13please consult the man page, in case the conversion went wrong. 14<br> 15<br><b> 16SYNOPSIS 17</b><br> 18<P> 19<b>#include <pcre2.h></b> 20</P> 21<P> 22<b>void pcre2_jit_stack_assign(pcre2_match_context *<i>mcontext</i>,</b> 23<b> pcre2_jit_callback <i>callback_function</i>, void *<i>callback_data</i>);</b> 24</P> 25<br><b> 26DESCRIPTION 27</b><br> 28<P> 29This function provides control over the memory used by JIT as a run-time stack 30when <b>pcre2_match()</b> or <b>pcre2_jit_match()</b> is called with a pattern 31that has been successfully processed by the JIT compiler. The information that 32determines which stack is used is put into a match context that is subsequently 33passed to a matching function. The arguments of this function are: 34<pre> 35 mcontext a pointer to a match context 36 callback a callback function 37 callback_data a JIT stack or a value to be passed to the callback 38</PRE> 39</P> 40<P> 41If <i>mcontext</i> is NULL, the function returns immediately, without doing 42anything. 43</P> 44<P> 45If <i>callback</i> is NULL and <i>callback_data</i> is NULL, an internal 32KiB 46block on the machine stack is used. 47</P> 48<P> 49If <i>callback</i> is NULL and <i>callback_data</i> is not NULL, 50<i>callback_data</i> must be a valid JIT stack, the result of calling 51<b>pcre2_jit_stack_create()</b>. 52</P> 53<P> 54If <i>callback</i> not NULL, it is called with <i>callback_data</i> as an 55argument at the start of matching, in order to set up a JIT stack. If the 56result is NULL, the internal 32KiB stack is used; otherwise the return value 57must be a valid JIT stack, the result of calling 58<b>pcre2_jit_stack_create()</b>. 59</P> 60<P> 61You may safely use the same JIT stack for multiple patterns, as long as they 62are all matched in the same thread. In a multithread application, each thread 63must use its own JIT stack. For more details, see the 64<a href="pcre2jit.html"><b>pcre2jit</b></a> 65page. 66</P> 67<P> 68There is a complete description of the PCRE2 native API in the 69<a href="pcre2api.html"><b>pcre2api</b></a> 70page and a description of the POSIX API in the 71<a href="pcre2posix.html"><b>pcre2posix</b></a> 72page. 73<p> 74Return to the <a href="index.html">PCRE2 index page</a>. 75</p> 76