1 // Copyright (c) 1987-2023 by the citadel.org team
2 // This program is open source software. Use, duplication, or disclosure
3 // are subject to the terms of the GNU General Public License, version 3.
5 // The functions in this file handle the selection and activation of a storage backend for Citadel Server.
6 // Right now, it simply activates Berkeley DB because that's the only one we have.
13 #include <libcitadel.h>
14 #include "ctdl_module.h"
16 #include "citserver.h"
19 // Header files for all available backends must be included here.
20 #include "backends/berkeley_db/berkeley_db.h"
22 // Backends must include implementations of all these functions, but with their own prefix instead of "cdb_".
23 // The initialization function of the selected backend will map them.
24 void (*cdb_open_databases)(void) = NULL;
25 void (*cdb_close_databases)(void) = NULL;
26 int (*cdb_store)(int, const void *, int, void *, int) = NULL;
27 int (*cdb_delete)(int, void *, int) = NULL;
28 void (*cdb_free)(struct cdbdata *) = NULL;
29 struct cdbdata * (*cdb_next_item)(int) = NULL;
30 void (*cdb_close_cursor)(int) = NULL;
31 void (*cdb_begin_transaction)(void) = NULL;
32 void (*cdb_end_transaction)(void) = NULL;
33 void (*cdb_check_handles)(void) = NULL;
34 void (*cdb_trunc)(int) = NULL;
35 void (*cdb_chmod_data)(void) = NULL;
36 void (*check_handles)(void *) = NULL;
37 void (*cdb_compact)(void) = NULL;
38 void (*cdb_checkpoint)(void) = NULL;
39 void (*cdb_rewind)(int) = NULL;
40 struct cdbdata * (*cdb_fetch)(int, const void *, int) = NULL;
42 // This function is responsible for choosing and initializing a back end.
43 void cdb_init_backends(void) {
44 bdb_init_backend(); // for now, this is the only one, so we select it always.