int user_free_master(void **user)
The user frees all the data structures within *user, and also free *user itself. This can be done using the built-in macro FREE that checks the existence of a pointer before freeing it.
|void **user||INOUT||Pointer to the user-defined data structure (should be NULL on return).|
|USER_ERROR||Ignored. This is probably not a fatal error.|
|USER_SUCCESS||Everything was freed successfully.|
|USER_DEFAULT||There is no user memory to free.|