NAME

       PCRE - Perl-compatible regular expressions

SYNOPSIS

       #include <pcre.h>

       void pcre_assign_jit_stack(pcre_extra *extra,
            pcre_jit_callback callback, void *data);

       void pcre16_assign_jit_stack(pcre16_extra *extra,
            pcre16_jit_callback callback, void *data);

       void pcre32_assign_jit_stack(pcre32_extra *extra,
            pcre32_jit_callback callback, void *data);

DESCRIPTION

       This  function  provides  control over the memory used as a stack at run-time by a call to
       pcre[16|32]_exec()  with  a  pattern  that  has  been  successfully  compiled   with   JIT
       optimization. The arguments are:

         extra     the data pointer returned by pcre[16|32]_study()
         callback  a callback function
         data      a JIT stack or a value to be passed to the callback
                     function

       If callback is NULL and data is NULL, an internal 32K block on the machine stack is used.

       If  callback  is  NULL and data is not NULL, data must be a valid JIT stack, the result of
       calling pcre[16|32]_jit_stack_alloc().

       If callback not NULL, it is called with data as an argument at the start of  matching,  in
       order  to  set  up  a  JIT  stack.  If the result is NULL, the internal 32K stack is used;
       otherwise  the  return  value  must  be  a  valid  JIT  stack,  the  result   of   calling
       pcre[16|32]_jit_stack_alloc().

       You  may  safely  assign  the same JIT stack to 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 pcrejit page.

       There  is  a  complete  description  of  the  PCRE  native  API  in the pcreapi page and a
       description of the POSIX API in the pcreposix page.