PCRE2 - Perl-compatible regular expressions (revised API)
#include <pcre2.h>
void pcre2_general_context_free(pcre2_general_context *gcontext);This function frees the memory occupied by a general context, using the memory freeing function within the context, if set. If the argument is NULL, the function returns immediately without doing anything.
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.