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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef NetworkCacheBlobStorage_h
#define NetworkCacheBlobStorage_h
#include "NetworkCacheData.h"
#include "NetworkCacheKey.h"
#include <memory>
#include <wtf/SHA1.h>
namespace WebKit {
namespace NetworkCache {
// BlobStorage deduplicates the data using SHA1 hash computed over the blob bytes.
class BlobStorage {
WTF_MAKE_TZONE_ALLOCATED(BlobStorage);
WTF_MAKE_NONCOPYABLE(BlobStorage);
public:
BlobStorage(const String& blobDirectoryPath, Salt, unsigned memoryCacheFileLimit = 0);
struct Blob {
Data data;
SHA1::Digest hash;
};
// These are all synchronous and should not be used from the main thread.
Blob add(const String& path, const Data&, bool addToMemoryCache = false);
Blob get(const String& path);
// Blob won't be removed until synchronization.
void remove(const String& path);
unsigned shareCount(const String& path);
size_t approximateSize() const { return m_approximateSize; }
void synchronize();
#if ENABLE(NETWORK_CACHE_BLOB_STORAGE_MEMORY_CACHE)
class MemoryCache {
WTF_MAKE_TZONE_ALLOCATED(MemoryCache);
WTF_MAKE_NONCOPYABLE(MemoryCache);
public:
explicit MemoryCache(unsigned fileLimit);
std::optional<Blob> get(const String& path);
void add(const String& path, const Blob&);
void remove(const String& path);
private:
UnfairLock m_lock;
unsigned m_limit;
HashMap<String, BlobStorage::Blob> m_cache;
};
#endif
private:
String blobDirectoryPathIsolatedCopy() const;
String blobPathForHash(const SHA1::Digest&) const;
const String m_blobDirectoryPath;
const Salt m_salt;
std::atomic<size_t> m_approximateSize { 0 };
#if ENABLE(NETWORK_CACHE_BLOB_STORAGE_MEMORY_CACHE)
std::unique_ptr<MemoryCache> m_memoryCache;
#endif
};
}
}
#endif
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