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Unified Diff: net/disk_cache/flash/log_structured_store.h

Issue 11532011: Renamed classes for consistency. (Closed) Base URL: http://git.chromium.org/chromium/src.git@master
Patch Set: test 2. Created 8 years ago
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Index: net/disk_cache/flash/log_structured_store.h
diff --git a/net/disk_cache/flash/log_structured_store.h b/net/disk_cache/flash/log_structured_store.h
deleted file mode 100644
index ea65d34325daa66f44eeb34509bc21f4cc396f6e..0000000000000000000000000000000000000000
--- a/net/disk_cache/flash/log_structured_store.h
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef NET_DISK_CACHE_FLASH_LOG_STRUCTURED_STORE_H_
-#define NET_DISK_CACHE_FLASH_LOG_STRUCTURED_STORE_H_
-
-#include <set>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/gtest_prod_util.h"
-#include "net/base/net_export.h"
-
-namespace disk_cache {
-
-class Segment;
-class Storage;
-
-// This class implements a general purpose store for storing and retrieving
-// entries consisting of arbitrary binary data. The store has log semantics,
-// i.e. it's not possible to overwrite data in place. In order to update an
-// entry, a new version must be written. Only one entry can be written to at
-// any given time, while concurrent reading of multiple entries is supported.
-class NET_EXPORT_PRIVATE LogStructuredStore {
- public:
- explicit LogStructuredStore(Storage* storage);
- ~LogStructuredStore();
-
- // Performs initialization. Must be the first function called and further
- // calls should be made only if it is successful.
- bool Init();
-
- // Closes the store. Should be the last function called before destruction.
- bool Close();
-
- // Creates an entry of |size| bytes. The id of the created entry is stored in
- // |entry_id|.
- bool CreateEntry(int32 size, int32* entry_id);
-
- // TODO(agayev): Add DeleteEntry.
-
- // Appends data to the end of the last created entry.
- bool WriteData(const void* buffer, int32 size);
-
- // Opens an entry with id |entry_id|.
- bool OpenEntry(int32 entry_id);
-
- // Reads |size| bytes starting from |offset| into |buffer|, where |offset| is
- // relative to the entry's content, from an entry identified by |entry_id|.
- bool ReadData(int32 entry_id, void* buffer, int32 size, int32 offset) const;
-
- // Closes an entry that was either opened with OpenEntry or created with
- // CreateEntry.
- void CloseEntry(int32 id);
-
- private:
- FRIEND_TEST_ALL_PREFIXES(FlashCacheTest,
- LogStructuredStoreReadFromClosedSegment);
- FRIEND_TEST_ALL_PREFIXES(FlashCacheTest,
- LogStructuredStoreSegmentSelectionIsFifo);
- FRIEND_TEST_ALL_PREFIXES(FlashCacheTest,
- LogStructuredStoreInUseSegmentIsSkipped);
- FRIEND_TEST_ALL_PREFIXES(FlashCacheTest,
- LogStructuredStoreReadFromCurrentAfterClose);
-
- int32 GetNextSegmentIndex();
- bool InUse(int32 segment_index) const;
-
- Storage* storage_;
-
- int32 num_segments_;
-
- // Currently open segments, either for reading or writing. There can only be
- // one segment open for writing, and multiple open for reading.
- std::vector<Segment*> open_segments_;
-
- // The index of the segment currently being written to. It's an index to
- // |open_segments_| vector.
- int32 write_index_;
-
- // Ids of entries currently open, either CreatEntry'ed or OpenEntry'ed.
- std::set<int32> open_entries_;
-
- // Id of the entry that is currently being written to, -1 if there is no entry
- // currently being written to.
- int32 current_entry_id_;
-
- // Number of bytes left to be written to the entry identified by
- // |current_entry_id_|. Its value makes sense iff |current_entry_id_| is not
- // -1.
- int32 current_entry_num_bytes_left_to_write_;
-
- bool init_; // Init was called.
- bool closed_; // Close was called.
-
- DISALLOW_COPY_AND_ASSIGN(LogStructuredStore);
-};
-
-} // namespace disk_cache
-
-#endif // NET_DISK_CACHE_FLASH_LOG_STRUCTURED_STORE_H_
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