pcre2_jit_stack_assign(3) — Linux manual page

NAME \| SYNOPSIS \| DESCRIPTION \| COLOPHON

PCRE2_JIT...CK_ASSIGN(3) Library Functions ManualPCRE2_JIT...CK_ASSIGN(3)

NAME top

       PCRE2 - Perl-compatible regular expressions (revised API)

SYNOPSIS top


       #include <pcre2.h>

       void pcre2_jit_stack_assign(pcre2_match_context *mcontext,
         pcre2_jit_callback callback_function, void *callback_data);

DESCRIPTION top


       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 top

       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 2025-08-11.  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

PCRE2 10.46-DEV               13 August 2018     PCRE2_JIT...CK_ASSIGN(3)