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    1 <html>
    2 <head>
    3 <title>pcre_assign_jit_stack specification</title>
    4 </head>
    5 <body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
    6 <h1>pcre_assign_jit_stack man page</h1>
    7 <p>
    8 Return to the <a href="index.html">PCRE index page</a>.
    9 </p>
   10 <p>
   11 This page is part of the PCRE HTML documentation. It was generated automatically
   12 from the original man page. If there is any nonsense in it, please consult the
   13 man page, in case the conversion went wrong.
   14 <br>
   15 <br><b>
   16 SYNOPSIS
   17 </b><br>
   18 <P>
   19 <b>#include &#60;pcre.h&#62;</b>
   20 </P>
   21 <P>
   22 <b>void pcre_assign_jit_stack(pcre_extra *<i>extra</i>,</b>
   23 <b>     pcre_jit_callback <i>callback</i>, void *<i>data</i>);</b>
   24 <br>
   25 <br>
   26 <b>void pcre16_assign_jit_stack(pcre16_extra *<i>extra</i>,</b>
   27 <b>     pcre16_jit_callback <i>callback</i>, void *<i>data</i>);</b>
   28 <br>
   29 <br>
   30 <b>void pcre32_assign_jit_stack(pcre32_extra *<i>extra</i>,</b>
   31 <b>     pcre32_jit_callback <i>callback</i>, void *<i>data</i>);</b>
   32 </P>
   33 <br><b>
   34 DESCRIPTION
   35 </b><br>
   36 <P>
   37 This function provides control over the memory used as a stack at run-time by a
   38 call to <b>pcre[16|32]_exec()</b> with a pattern that has been successfully
   39 compiled with JIT optimization. The arguments are:
   40 <pre>
   41   extra     the data pointer returned by <b>pcre[16|32]_study()</b>
   42   callback  a callback function
   43   data      a JIT stack or a value to be passed to the callback
   44               function
   45 </PRE>
   46 </P>
   47 <P>
   48 If <i>callback</i> is NULL and <i>data</i> is NULL, an internal 32K block on
   49 the machine stack is used.
   50 </P>
   51 <P>
   52 If <i>callback</i> is NULL and <i>data</i> is not NULL, <i>data</i> must
   53 be a valid JIT stack, the result of calling <b>pcre[16|32]_jit_stack_alloc()</b>.
   54 </P>
   55 <P>
   56 If <i>callback</i> not NULL, it is called with <i>data</i> as an argument at
   57 the start of matching, in order to set up a JIT stack. If the result is NULL,
   58 the internal 32K stack is used; otherwise the return value must be a valid JIT
   59 stack, the result of calling <b>pcre[16|32]_jit_stack_alloc()</b>.
   60 </P>
   61 <P>
   62 You may safely assign the same JIT stack to multiple patterns, as long as they
   63 are all matched in the same thread. In a multithread application, each thread
   64 must use its own JIT stack. For more details, see the
   65 <a href="pcrejit.html"><b>pcrejit</b></a>
   66 page.
   67 </P>
   68 <P>
   69 There is a complete description of the PCRE native API in the
   70 <a href="pcreapi.html"><b>pcreapi</b></a>
   71 page and a description of the POSIX API in the
   72 <a href="pcreposix.html"><b>pcreposix</b></a>
   73 page.
   74 <p>
   75 Return to the <a href="index.html">PCRE index page</a>.
   76 </p>