db_env_set_func_free
#include <db.h>
int
db_env_set_func_free(void (*func_free)(void *ptr)); Replace Berkeley DB calls to the ANSI C X3.159-1989 (ANSI C) standard free function with func_free, which must conform to the standard interface specification.
The db_env_set_func_free() function configures all operations performed by a process and all of its threads of control, not operations confined to a single database environment.
Although the db_env_set_func_free() function may be called at any time during the life of the application, it should normally be called before making calls to the db_env_create or db_create methods.
The db_env_set_func_free() function returns a non-zero error value on failure and 0 on success.
Parameters
func_free
The func_free parameter is the replacement function. It must conform to the standard interface specification.