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.