1 /*
2  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 enum got_object_cache_type {
18 	GOT_OBJECT_CACHE_TYPE_OBJ,
19 	GOT_OBJECT_CACHE_TYPE_TREE,
20 	GOT_OBJECT_CACHE_TYPE_COMMIT,
21 	GOT_OBJECT_CACHE_TYPE_TAG,
22 	GOT_OBJECT_CACHE_TYPE_RAW,
23 };
24 
25 struct got_object_cache_entry {
26 	struct got_object_id id;
27 	union {
28 		struct got_object *obj;
29 		struct got_tree_object *tree;
30 		struct got_commit_object *commit;
31 		struct got_tag_object *tag;
32 		struct got_raw_object *raw;
33 	} data;
34 };
35 
36 struct got_object_cache {
37 	enum got_object_cache_type type;
38 	struct got_object_idset *idset;
39 	size_t size;
40 	int cache_searches;
41 	int cache_hit;
42 	int cache_miss;
43 	int cache_evict;
44 	int cache_toolarge;
45 	size_t max_cached_size;
46 };
47 
48 const struct got_error *got_object_cache_init(struct got_object_cache *,
49     enum got_object_cache_type);
50 const struct got_error *got_object_cache_add(struct got_object_cache *,
51     struct got_object_id *, void *);
52 void *got_object_cache_get(struct got_object_cache *, struct got_object_id *);
53 void got_object_cache_close(struct got_object_cache *);