#include <pcre2.h>
pcre2_general_context *pcre2_general_context_copy( pcre2_general_context *gcontext);
This function makes a new copy of a general context, using the memory allocation functions in the context, if set, to get the necessary memory. Otherwise malloc() is used. The result is NULL if the memory cannot be obtained.
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.