| /* |
| * Copyright (C) 2009-2011 the libgit2 contributors |
| * |
| * This file is part of libgit2, distributed under the GNU GPL v2 with |
| * a Linking Exception. For full terms see the included COPYING file. |
| */ |
| #ifndef INCLUDE_cache_h__ |
| #define INCLUDE_cache_h__ |
| |
| #include "git2/common.h" |
| #include "git2/oid.h" |
| #include "git2/odb.h" |
| |
| #include "thread-utils.h" |
| |
| #define GIT_DEFAULT_CACHE_SIZE 128 |
| |
| typedef void (*git_cached_obj_freeptr)(void *); |
| |
| typedef struct { |
| git_oid oid; |
| git_atomic refcount; |
| } git_cached_obj; |
| |
| typedef struct { |
| git_cached_obj *ptr; |
| git_mutex lock; |
| } cache_node; |
| |
| typedef struct { |
| cache_node *nodes; |
| |
| unsigned int lru_count; |
| size_t size_mask; |
| git_cached_obj_freeptr free_obj; |
| } git_cache; |
| |
| |
| int git_cache_init(git_cache *cache, size_t size, git_cached_obj_freeptr free_ptr); |
| void git_cache_free(git_cache *cache); |
| |
| void *git_cache_try_store(git_cache *cache, void *entry); |
| void *git_cache_get(git_cache *cache, const git_oid *oid); |
| |
| |
| GIT_INLINE(int) git_cached_obj_compare(git_cached_obj *obj, const git_oid *oid) |
| { |
| return git_oid_cmp(&obj->oid, oid); |
| } |
| |
| GIT_INLINE(void) git_cached_obj_incref(git_cached_obj *obj) |
| { |
| git_atomic_inc(&obj->refcount); |
| } |
| |
| GIT_INLINE(void) git_cached_obj_decref(git_cached_obj *obj, git_cached_obj_freeptr free_obj) |
| { |
| if (git_atomic_dec(&obj->refcount) == 0) |
| free_obj(obj); |
| } |
| |
| |
| |
| #endif |