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      3 <title>pcre_assign_jit_stack specification</title>
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      6 <h1>pcre_assign_jit_stack man page</h1>
      7 <p>
      8 Return to the <a href="index.html">PCRE index page</a>.
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     10 <p>
     11 This page is part of the PCRE HTML documentation. It was generated automatically
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     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>
     77