pcre2_maketables_free (3) - Linux Man Pages
pcre2_maketables_free: Perl-compatible regular expressions (revised API)
PCRE2 - Perl-compatible regular expressions (revised API)
void pcre2_maketables_free(pcre2_general_context *gcontext, const uint8_t *tables);
This function discards a set of character tables that were created by a call to pcre2_maketables().
The gcontext parameter should match what was used in that call to account for any custom allocators that might be in use; if it is NULL the system free() is used.
There is a complete description of the PCRE2 native API in the pcre2api page.