pcre2_jit_stack_assign(3) pcre2_jit_stack_assign(3)
NAME
PCRE2 - Perl-compatible regular expressions (revised API)
SYNOPSIS
#include <pcre2.h>
pcre2_jit_stack_assign(3) *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 argu-
ments 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)
pcre2 10.32 - Generated Sun Sep 16 09:38:57 CDT 2018