PCRE2_JIT_STACK_ASSIGN(3)                     FreeBSD Library Functions Manual

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.

PCRE2 10.32                      28 June 2018        PCRE2_JIT_STACK_ASSIGN(3)