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cache.h

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/*

* Copyright (C) 2009-2012 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 **nodes;

git_mutex lock;

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(void) git_cached_obj_incref(void *_obj)

{

git_cached_obj *obj = _obj;

git_atomic_inc(&obj->refcount);

}

GIT_INLINE(void) git_cached_obj_decref(void *_obj, git_cached_obj_freeptr free_obj)

{

git_cached_obj *obj = _obj;

if (git_atomic_dec(&obj->refcount) == 0)

free_obj(obj);

}

#endif