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> 8 Return to the <a href="index.html">PCRE2 index page</a>. 9 </p> 10 <p> 11 This page is part of the PCRE2 HTML documentation. It was generated 12 automatically from the original man page. If there is any nonsense in it, 13 please consult the man page, in case the conversion went wrong. 14 <br> 15 <br><b> 16 SYNOPSIS 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> 26 DESCRIPTION 27 </b><br> 28 <P> 29 This function provides control over the memory used by JIT as a run-time stack 30 when <b>pcre2_match()</b> or <b>pcre2_jit_match()</b> is called with a pattern 31 that has been successfully processed by the JIT compiler. The information that 32 determines which stack is used is put into a match context that is subsequently 33 passed 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> 41 If <i>mcontext</i> is NULL, the function returns immediately, without doing 42 anything. 43 </P> 44 <P> 45 If <i>callback</i> is NULL and <i>callback_data</i> is NULL, an internal 32KiB 46 block on the machine stack is used. 47 </P> 48 <P> 49 If <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> 54 If <i>callback</i> not NULL, it is called with <i>callback_data</i> as an 55 argument at the start of matching, in order to set up a JIT stack. If the 56 result is NULL, the internal 32KiB stack is used; otherwise the return value 57 must be a valid JIT stack, the result of calling 58 <b>pcre2_jit_stack_create()</b>. 59 </P> 60 <P> 61 You may safely use the same JIT stack for multiple patterns, as long as they 62 are all matched in the same thread. In a multithread application, each thread 63 must use its own JIT stack. For more details, see the 64 <a href="pcre2jit.html"><b>pcre2jit</b></a> 65 page. 66 </P> 67 <P> 68 There is a complete description of the PCRE2 native API in the 69 <a href="pcre2api.html"><b>pcre2api</b></a> 70 page and a description of the POSIX API in the 71 <a href="pcre2posix.html"><b>pcre2posix</b></a> 72 page. 73 <p> 74 Return to the <a href="index.html">PCRE2 index page</a>. 75 </p> 76
