thodg/libgit2/src/cache.h

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• Hash : 78606263
  Author :
  Date : 2013-04-15T00:05:44
  

  Add callback to git_objects_table This adds create and free callback to the git_objects_table so that more of the creation and destruction of objects can be table driven instead of using switch statements. This also makes the semantics of certain object creation functions consistent so that we can make better use of function pointers. This also fixes a theoretical error case where an object allocation fails and we end up storing NULL into the cache.

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• src/cache.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * 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"
  #include "oidmap.h"
  
  enum {
  	GIT_CACHE_STORE_ANY = 0,
  	GIT_CACHE_STORE_RAW = 1,
  	GIT_CACHE_STORE_PARSED = 2
  };
  
  typedef struct {
  	git_oid    oid;
  	int16_t    type;  /* git_otype value */
  	uint16_t   flags; /* GIT_CACHE_STORE value */
  	size_t     size;
  	git_atomic refcount;
  } git_cached_obj;
  
  typedef struct {
  	git_oidmap *map;
  	git_mutex   lock;
  	size_t      used_memory;
  } git_cache;
  
  extern bool git_cache__enabled;
  
  int git_cache_set_max_object_size(git_otype type, size_t size);
  
  int git_cache_init(git_cache *cache);
  void git_cache_free(git_cache *cache);
  
  void *git_cache_store_raw(git_cache *cache, git_odb_object *entry);
  void *git_cache_store_parsed(git_cache *cache, git_object *entry);
  
  git_odb_object *git_cache_get_raw(git_cache *cache, const git_oid *oid);
  git_object *git_cache_get_parsed(git_cache *cache, const git_oid *oid);
  void *git_cache_get_any(git_cache *cache, const git_oid *oid);
  
  GIT_INLINE(size_t) git_cache_size(git_cache *cache)
  {
  	return (size_t)kh_size(cache->map);
  }
  
  GIT_INLINE(void) git_cached_obj_incref(void *_obj)
  {
  	git_cached_obj *obj = _obj;
  	git_atomic_inc(&obj->refcount);
  }
  
  void git_cached_obj_decref(void *_obj);
  
  #endif
  

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