src/cache.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7 #ifndef INCLUDE_cache_h__
   8 #define INCLUDE_cache_h__
   9
  10 #include "git2/common.h"
  11 #include "git2/oid.h"
  12 #include "git2/odb.h"
  13
  14 #include "thread-utils.h"
  15 #include "oidmap.h"
  16
  17 enum {
  18         GIT_CACHE_STORE_ANY = 0,
  19         GIT_CACHE_STORE_RAW = 1,
  20         GIT_CACHE_STORE_PARSED = 2
  21 };
  22
  23 typedef struct {
  24         git_oid    oid;
  25         int16_t    type;  /* git_otype value */
  26         uint16_t   flags; /* GIT_CACHE_STORE value */
  27         size_t     size;
  28         git_atomic refcount;
  29 } git_cached_obj;
  30
  31 typedef struct {
  32         git_oidmap *map;
  33         git_rwlock  lock;
  34         ssize_t     used_memory;
  35 } git_cache;
  36
  37 extern bool git_cache__enabled;
  38 extern ssize_t git_cache__max_storage;
  39 extern git_atomic_ssize git_cache__current_storage;
  40
  41 int git_cache_set_max_object_size(git_otype type, size_t size);
  42
  43 int git_cache_init(git_cache *cache);
  44 void git_cache_free(git_cache *cache);
  45 void git_cache_clear(git_cache *cache);
  46
  47 void *git_cache_store_raw(git_cache *cache, git_odb_object *entry);
  48 void *git_cache_store_parsed(git_cache *cache, git_object *entry);
  49
  50 git_odb_object *git_cache_get_raw(git_cache *cache, const git_oid *oid);
  51 git_object *git_cache_get_parsed(git_cache *cache, const git_oid *oid);
  52 void *git_cache_get_any(git_cache *cache, const git_oid *oid);
  53
  54 GIT_INLINE(size_t) git_cache_size(git_cache *cache)
  55 {
  56         return (size_t)kh_size(cache->map);
  57 }
  58
  59 GIT_INLINE(void) git_cached_obj_incref(void *_obj)
  60 {
  61         git_cached_obj *obj = _obj;
  62         git_atomic_inc(&obj->refcount);
  63 }
  64
  65 void git_cached_obj_decref(void *_obj);
  66
  67 #endif