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)