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https://git.proxmox.com/git/libgit2
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6a211d7c9a
This significantly reduces contention when many threads are trying to read from the cache simultaneously.
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#ifndef INCLUDE_cache_h__
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#define INCLUDE_cache_h__
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#include "git2/common.h"
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#include "git2/oid.h"
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#include "git2/odb.h"
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#include "thread-utils.h"
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#include "oidmap.h"
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enum {
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GIT_CACHE_STORE_ANY = 0,
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GIT_CACHE_STORE_RAW = 1,
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GIT_CACHE_STORE_PARSED = 2
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};
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typedef struct {
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git_oid oid;
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int16_t type; /* git_otype value */
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uint16_t flags; /* GIT_CACHE_STORE value */
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size_t size;
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git_atomic refcount;
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} git_cached_obj;
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typedef struct {
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git_oidmap *map;
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git_rwlock lock;
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ssize_t used_memory;
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} git_cache;
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extern bool git_cache__enabled;
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extern ssize_t git_cache__max_storage;
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extern git_atomic_ssize git_cache__current_storage;
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int git_cache_set_max_object_size(git_otype type, size_t size);
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int git_cache_init(git_cache *cache);
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void git_cache_free(git_cache *cache);
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void git_cache_clear(git_cache *cache);
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void *git_cache_store_raw(git_cache *cache, git_odb_object *entry);
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void *git_cache_store_parsed(git_cache *cache, git_object *entry);
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git_odb_object *git_cache_get_raw(git_cache *cache, const git_oid *oid);
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git_object *git_cache_get_parsed(git_cache *cache, const git_oid *oid);
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void *git_cache_get_any(git_cache *cache, const git_oid *oid);
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GIT_INLINE(size_t) git_cache_size(git_cache *cache)
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{
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return (size_t)kh_size(cache->map);
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}
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GIT_INLINE(void) git_cached_obj_incref(void *_obj)
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{
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git_cached_obj *obj = _obj;
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git_atomic_inc(&obj->refcount);
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}
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void git_cached_obj_decref(void *_obj);
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#endif
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