2 * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
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.
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.
18 #include <sys/queue.h>
26 #include "got_error.h"
27 #include "got_object.h"
29 #include "got_lib_delta.h"
30 #include "got_lib_inflate.h"
31 #include "got_lib_object.h"
32 #include "got_lib_object_idset.h"
33 #include "got_lib_object_cache.h"
35 #define GOT_OBJECT_CACHE_SIZE_OBJ 256
36 #define GOT_OBJECT_CACHE_SIZE_TREE 256
37 #define GOT_OBJECT_CACHE_SIZE_COMMIT 64
38 #define GOT_OBJECT_CACHE_SIZE_TAG 32
40 const struct got_error *
41 got_object_cache_init(struct got_object_cache *cache,
42 enum got_object_cache_type type)
44 memset(cache, 0, sizeof(*cache));
46 cache->idset = got_object_idset_alloc();
47 if (cache->idset == NULL)
48 return got_error_from_errno();
52 case GOT_OBJECT_CACHE_TYPE_OBJ:
53 cache->size = GOT_OBJECT_CACHE_SIZE_OBJ;
55 case GOT_OBJECT_CACHE_TYPE_TREE:
56 cache->size = GOT_OBJECT_CACHE_SIZE_TREE;
58 case GOT_OBJECT_CACHE_TYPE_COMMIT:
59 cache->size = GOT_OBJECT_CACHE_SIZE_COMMIT;
61 case GOT_OBJECT_CACHE_TYPE_TAG:
62 cache->size = GOT_OBJECT_CACHE_SIZE_TAG;
68 const struct got_error *
69 got_object_cache_add(struct got_object_cache *cache, struct got_object_id *id, void *item)
71 const struct got_error *err = NULL;
72 struct got_object_cache_entry *ce;
75 nelem = got_object_idset_num_elements(cache->idset);
76 if (nelem >= cache->size) {
77 err = got_object_idset_remove((void **)&ce,
81 switch (cache->type) {
82 case GOT_OBJECT_CACHE_TYPE_OBJ:
83 got_object_close(ce->data.obj);
85 case GOT_OBJECT_CACHE_TYPE_TREE:
86 got_object_tree_close(ce->data.tree);
88 case GOT_OBJECT_CACHE_TYPE_COMMIT:
89 got_object_commit_close(ce->data.commit);
91 case GOT_OBJECT_CACHE_TYPE_TAG:
92 got_object_tag_close(ce->data.tag);
99 ce = malloc(sizeof(*ce));
101 return got_error_from_errno();
102 memcpy(&ce->id, id, sizeof(ce->id));
103 switch (cache->type) {
104 case GOT_OBJECT_CACHE_TYPE_OBJ:
105 ce->data.obj = (struct got_object *)item;
107 case GOT_OBJECT_CACHE_TYPE_TREE:
108 ce->data.tree = (struct got_tree_object *)item;
110 case GOT_OBJECT_CACHE_TYPE_COMMIT:
111 ce->data.commit = (struct got_commit_object *)item;
113 case GOT_OBJECT_CACHE_TYPE_TAG:
114 ce->data.tag = (struct got_tag_object *)item;
118 err = got_object_idset_add(cache->idset, id, ce);
120 if (err->code == GOT_ERR_OBJ_EXISTS) {
129 got_object_cache_get(struct got_object_cache *cache, struct got_object_id *id)
131 struct got_object_cache_entry *ce;
133 cache->cache_searches++;
134 ce = got_object_idset_get(cache->idset, id);
137 switch (cache->type) {
138 case GOT_OBJECT_CACHE_TYPE_OBJ:
140 case GOT_OBJECT_CACHE_TYPE_TREE:
141 return ce->data.tree;
142 case GOT_OBJECT_CACHE_TYPE_COMMIT:
143 return ce->data.commit;
144 case GOT_OBJECT_CACHE_TYPE_TAG:
153 #ifdef GOT_OBJ_CACHE_DEBUG
155 print_cache_stats(struct got_object_cache *cache, const char *name)
157 fprintf(stderr, "%s: %s cache: %d elements, %d searches, %d hits, "
158 "%d missed, %d evicted\n", getprogname(), name,
159 got_object_idset_num_elements(cache->idset),
160 cache->cache_searches, cache->cache_hit,
161 cache->cache_miss, cache->cache_evict);
164 const struct got_error *
165 check_refcount(struct got_object_id *id, void *data, void *arg)
167 struct got_object_cache *cache = arg;
168 struct got_object_cache_entry *ce = data;
169 struct got_object *obj;
170 struct got_tree_object *tree;
171 struct got_commit_object *commit;
172 struct got_tag_object *tag;
175 if (got_object_id_str(&id_str, id) != NULL)
178 switch (cache->type) {
179 case GOT_OBJECT_CACHE_TYPE_OBJ:
181 if (obj->refcnt == 1)
183 fprintf(stderr, "object %s has %d unclaimed references\n",
184 id_str, obj->refcnt - 1);
186 case GOT_OBJECT_CACHE_TYPE_TREE:
187 tree = ce->data.tree;
188 if (tree->refcnt == 1)
190 fprintf(stderr, "tree %s has %d unclaimed references\n",
191 id_str, tree->refcnt - 1);
193 case GOT_OBJECT_CACHE_TYPE_COMMIT:
194 commit = ce->data.commit;
195 if (commit->refcnt == 1)
197 fprintf(stderr, "commit %s has %d unclaimed references\n",
198 id_str, commit->refcnt - 1);
200 case GOT_OBJECT_CACHE_TYPE_TAG:
202 if (tag->refcnt == 1)
204 fprintf(stderr, "tag %s has %d unclaimed references\n",
205 id_str, tag->refcnt - 1);
214 got_object_cache_close(struct got_object_cache *cache)
216 #ifdef GOT_OBJ_CACHE_DEBUG
217 switch (cache->type) {
218 case GOT_OBJECT_CACHE_TYPE_OBJ:
219 print_cache_stats(cache, "object");
221 case GOT_OBJECT_CACHE_TYPE_TREE:
222 print_cache_stats(cache, "tree");
224 case GOT_OBJECT_CACHE_TYPE_COMMIT:
225 print_cache_stats(cache, "commit");
229 got_object_idset_for_each(cache->idset, check_refcount, cache);
233 got_object_idset_free(cache->idset);