1PCRE2_JIT_STACK_ASSIGN(3)  Library Functions Manual  PCRE2_JIT_STACK_ASSIGN(3)
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NAME

6       PCRE2 - Perl-compatible regular expressions (revised API)
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SYNOPSIS

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10       #include <pcre2.h>
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12       void pcre2_jit_stack_assign(pcre2_match_context *mcontext,
13         pcre2_jit_callback callback_function, void *callback_data);
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DESCRIPTION

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17       This  function  provides  control over the memory used by JIT as a run-
18       time stack when pcre2_match() or pcre2_jit_match()  is  called  with  a
19       pattern  that  has been successfully processed by the JIT compiler. The
20       information that determines which stack is used is  put  into  a  match
21       context  that  is subsequently passed to a matching function. The argu‐
22       ments of this function are:
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24         mcontext       a pointer to a match context
25         callback       a callback function
26         callback_data  a JIT stack or a value to be passed to the callback
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28       If mcontext is NULL, the function returns  immediately,  without  doing
29       anything.
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31       If  callback is NULL and callback_data is NULL, an internal 32KiB block
32       on the machine stack is used.
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34       If callback is NULL and callback_data is not NULL,  callback_data  must
35       be a valid JIT stack, the result of calling pcre2_jit_stack_create().
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37       If callback not NULL, it is called with callback_data as an argument at
38       the start of matching, in order to set up a JIT stack. If the result is
39       NULL, the internal 32KiB stack is used; otherwise the return value must
40       be a valid JIT stack, the result of calling pcre2_jit_stack_create().
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42       You may safely use the same JIT stack for multiple patterns, as long as
43       they  are all matched in the same thread. In a multithread application,
44       each thread must use its own JIT  stack.  For  more  details,  see  the
45       pcre2jit page.
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47       There is a complete description of the PCRE2 native API in the pcre2api
48       page and a description of the POSIX API in the pcre2posix page.
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52PCRE2 10.32                      28 June 2018        PCRE2_JIT_STACK_ASSIGN(3)
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