thodg/libgit2/src/cache.h

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• Hash : bb742ede
  Author :
  Date : 2011-09-19T01:54:32
  

  Cleanup legal data 1. The license header is technically not valid if it doesn't have a copyright signature. 2. The COPYING file has been updated with the different licenses used in the project. 3. The full GPLv2 header in each file annoys me.

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• src/cache.h

• /*
   * 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
  

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