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 #define GOT_PACKIDX_CACHE_SIZE	16
18 #define GOT_PACK_CACHE_SIZE	GOT_PACKIDX_CACHE_SIZE
19 
20 struct got_repository {
21 	char *path;
22 	char *path_git_dir;
23 
24 	/* The pack index cache speeds up search for packed objects. */
25 	struct got_packidx *packidx_cache[GOT_PACKIDX_CACHE_SIZE];
26 
27 	/* Open file handles for pack files. */
28 	struct got_pack packs[GOT_PACK_CACHE_SIZE];
29 
30 	/* Handles to child processes for reading loose objects. */
31 	 struct got_privsep_child privsep_children[5];
32 #define GOT_REPO_PRIVSEP_CHILD_OBJECT	0
33 #define GOT_REPO_PRIVSEP_CHILD_COMMIT	1
34 #define GOT_REPO_PRIVSEP_CHILD_TREE	2
35 #define GOT_REPO_PRIVSEP_CHILD_BLOB	3
36 #define GOT_REPO_PRIVSEP_CHILD_TAG	4
37 
38 	/* Caches for open objects. */
39 	struct got_object_cache objcache;
40 	struct got_object_cache treecache;
41 	struct got_object_cache commitcache;
42 	struct got_object_cache tagcache;
43 };
44 
45 const struct got_error*got_repo_cache_object(struct got_repository *,
46     struct got_object_id *, struct got_object *);
47 struct got_object *got_repo_get_cached_object(struct got_repository *,
48     struct got_object_id *);
49 const struct got_error*got_repo_cache_tree(struct got_repository *,
50     struct got_object_id *, struct got_tree_object *);
51 struct got_tree_object *got_repo_get_cached_tree(struct got_repository *,
52     struct got_object_id *);
53 const struct got_error*got_repo_cache_commit(struct got_repository *,
54     struct got_object_id *, struct got_commit_object *);
55 struct got_commit_object *got_repo_get_cached_commit(struct got_repository *,
56     struct got_object_id *);
57 const struct got_error*got_repo_cache_tag(struct got_repository *,
58     struct got_object_id *, struct got_tag_object *);
59 struct got_tag_object *got_repo_get_cached_tag(struct got_repository *,
60     struct got_object_id *);
61 const struct got_error *got_repo_cache_packidx(struct got_repository *,
62     struct got_packidx *);
63 const struct got_error *got_repo_search_packidx(struct got_packidx **, int *,
64     struct got_repository *, struct got_object_id *);
65 const struct got_error *got_repo_cache_pack(struct got_pack **,
66     struct got_repository *, const char *, struct got_packidx *);