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| <title>pcre2_jit_stack_assign specification</title> | |
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| <h1>pcre2_jit_stack_assign man page</h1> | |
| <p> | |
| Return to the <a href="index.html">PCRE2 index page</a>. | |
| </p> | |
| <p> | |
| This page is part of the PCRE2 HTML documentation. It was generated | |
| automatically from the original man page. If there is any nonsense in it, | |
| please consult the man page, in case the conversion went wrong. | |
| <br> | |
| <h2> | |
| SYNOPSIS | |
| </h2> | |
| <p> | |
| <b>#include <pcre2.h></b> | |
| </p> | |
| <p> | |
| <b>void pcre2_jit_stack_assign(pcre2_match_context *<i>mcontext</i>,</b> | |
| <b> pcre2_jit_callback <i>callback_function</i>, void *<i>callback_data</i>);</b> | |
| </p> | |
| <h2> | |
| DESCRIPTION | |
| </h2> | |
| <p> | |
| This function provides control over the memory used by JIT as a run-time stack | |
| when <b>pcre2_match()</b> or <b>pcre2_jit_match()</b> is called with a pattern | |
| that has been successfully processed by the JIT compiler. The information that | |
| determines which stack is used is put into a match context that is subsequently | |
| passed to a matching function. The arguments of this function are: | |
| <pre> | |
| mcontext a pointer to a match context | |
| callback a callback function | |
| callback_data a JIT stack or a value to be passed to the callback | |
| </pre> | |
| </p> | |
| <p> | |
| If <i>mcontext</i> is NULL, the function returns immediately, without doing | |
| anything. | |
| </p> | |
| <p> | |
| If <i>callback</i> is NULL and <i>callback_data</i> is NULL, an internal 32KiB | |
| block on the machine stack is used. | |
| </p> | |
| <p> | |
| If <i>callback</i> is NULL and <i>callback_data</i> is not NULL, | |
| <i>callback_data</i> must be a valid JIT stack, the result of calling | |
| <b>pcre2_jit_stack_create()</b>. | |
| </p> | |
| <p> | |
| If <i>callback</i> not NULL, it is called with <i>callback_data</i> as an | |
| argument at the start of matching, in order to set up a JIT stack. If the | |
| result is NULL, the internal 32KiB stack is used; otherwise the return value | |
| must be a valid JIT stack, the result of calling | |
| <b>pcre2_jit_stack_create()</b>. | |
| </p> | |
| <p> | |
| You may safely use the same JIT stack for multiple patterns, as long as they | |
| are all matched in the same thread. In a multithread application, each thread | |
| must use its own JIT stack. For more details, see the | |
| <a href="pcre2jit.html"><b>pcre2jit</b></a> | |
| page. | |
| </p> | |
| <p> | |
| There is a complete description of the PCRE2 native API in the | |
| <a href="pcre2api.html"><b>pcre2api</b></a> | |
| page and a description of the POSIX API in the | |
| <a href="pcre2posix.html"><b>pcre2posix</b></a> | |
| page. | |
| <p> | |
| Return to the <a href="index.html">PCRE2 index page</a>. | |
| </p> | |