pcre2_jit_stack_assign(3) — Linux manual page
PCRE2_JI...K_ASSIGN(3) Library Functions Manual PCRE2_JI...K_ASSIGN(3)
NAME
PCRE2 - Perl-compatible regular expressions (revised API)
SYNOPSIS
#include <pcre2.h>
void pcre2_jit_stack_assign(pcre2_match_context *mcontext,
pcre2_jit_callback callback_function, void *callback_data);
DESCRIPTION
This function provides control over the memory used by JIT as a
run-time stack when pcre2_match() or pcre2_jit_match() 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:
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
If mcontext is NULL, the function returns immediately, without
doing anything.
If callback is NULL and callback_data is NULL, an internal 32KiB
block on the machine stack is used.
If callback is NULL and callback_data is not NULL, callback_data
must be a valid JIT stack, the result of calling
pcre2_jit_stack_create().
If callback not NULL, it is called with callback_data 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 pcre2_jit_stack_create().
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 pcre2jit page.
There is a complete description of the PCRE2 native API in the
pcre2api page and a description of the POSIX API in the
pcre2posix page.
COLOPHON
This page is part of the PCRE (Perl Compatible Regular
Expressions) project. Information about the project can be found
at ⟨http://www.pcre.org/⟩. If you have a bug report for this
manual page, see
⟨http://bugs.exim.org/enter_bug.cgi?product=PCRE⟩. This page was
obtained from the tarball fetched from
⟨https://github.com/PhilipHazel/pcre2.git⟩ on 2024-06-14. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org