pcre2_set_heap_limit (3) - Linux Manuals
pcre2_set_heap_limit: Perl-compatible regular expressions (revised API)
NAME
PCRE2 - Perl-compatible regular expressions (revised API)
SYNOPSIS
#include <pcre2.h>
int pcre2_set_heap_limit(pcre2_match_context *mcontext, uint32_t value);
DESCRIPTION
This function sets the backtracking heap limit field in a match context. The result is always zero.
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.