Remove //net (except for Android test stuff) and sdch

net/disk_cache/simple/simple_index.h

-// Copyright (c) 2013 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_SIMPLE_SIMPLE_INDEX_H_
-#define NET_DISK_CACHE_SIMPLE_SIMPLE_INDEX_H_
-
-#include <list>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/containers/hash_tables.h"
-#include "base/files/file_path.h"
-#include "base/gtest_prod_util.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/single_thread_task_runner.h"
-#include "base/threading/thread_checker.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "net/base/cache_type.h"
-#include "net/base/completion_callback.h"
-#include "net/base/net_export.h"
-
-#if defined(OS_ANDROID)
-#include "base/android/application_status_listener.h"
-#endif
-
-class Pickle;
-class PickleIterator;
-
-namespace disk_cache {
-
-class SimpleIndexDelegate;
-class SimpleIndexFile;
-struct SimpleIndexLoadResult;
-
-class NET_EXPORT_PRIVATE EntryMetadata {
- public:
-  EntryMetadata();
-  EntryMetadata(base::Time last_used_time, uint64 entry_size);
-
-  base::Time GetLastUsedTime() const;
-  void SetLastUsedTime(const base::Time& last_used_time);
-
-  uint64 GetEntrySize() const;
-  void SetEntrySize(uint64 entry_size);
-
-  // Serialize the data into the provided pickle.
-  void Serialize(Pickle* pickle) const;
-  bool Deserialize(PickleIterator* it);
-
-  static base::TimeDelta GetLowerEpsilonForTimeComparisons() {
-    return base::TimeDelta::FromSeconds(1);
-  }
-  static base::TimeDelta GetUpperEpsilonForTimeComparisons() {
-    return base::TimeDelta();
-  }
-
- private:
-  friend class SimpleIndexFileTest;
-
-  // There are tens of thousands of instances of EntryMetadata in memory, so the
-  // size of each entry matters.  Even when the values used to set these members
-  // are originally calculated as >32-bit types, the actual necessary size for
-  // each shouldn't exceed 32 bits, so we use 32-bit types here.
-  uint32 last_used_time_seconds_since_epoch_;
-  int32 entry_size_;  // Storage size in bytes.
-};
-static_assert(sizeof(EntryMetadata) == 8, "incorrect metadata size");
-
-// This class is not Thread-safe.
-class NET_EXPORT_PRIVATE SimpleIndex
-    : public base::SupportsWeakPtr<SimpleIndex> {
- public:
-  typedef std::vector<uint64> HashList;
-
-  SimpleIndex(const scoped_refptr<base::SingleThreadTaskRunner>& io_thread,
-              SimpleIndexDelegate* delegate,
-              net::CacheType cache_type,
-              scoped_ptr<SimpleIndexFile> simple_index_file);
-
-  virtual ~SimpleIndex();
-
-  void Initialize(base::Time cache_mtime);
-
-  void SetMaxSize(uint64 max_bytes);
-  uint64 max_size() const { return max_size_; }
-
-  void Insert(uint64 entry_hash);
-  void Remove(uint64 entry_hash);
-
-  // Check whether the index has the entry given the hash of its key.
-  bool Has(uint64 entry_hash) const;
-
-  // Update the last used time of the entry with the given key and return true
-  // iff the entry exist in the index.
-  bool UseIfExists(uint64 entry_hash);
-
-  void WriteToDisk();
-
-  // Update the size (in bytes) of an entry, in the metadata stored in the
-  // index. This should be the total disk-file size including all streams of the
-  // entry.
-  bool UpdateEntrySize(uint64 entry_hash, int64 entry_size);
-
-  typedef base::hash_map<uint64, EntryMetadata> EntrySet;
-
-  static void InsertInEntrySet(uint64 entry_hash,
-                               const EntryMetadata& entry_metadata,
-                               EntrySet* entry_set);
-
-  // Executes the |callback| when the index is ready. Allows multiple callbacks.
-  int ExecuteWhenReady(const net::CompletionCallback& callback);
-
-  // Returns entries from the index that have last accessed time matching the
-  // range between |initial_time| and |end_time| where open intervals are
-  // possible according to the definition given in |DoomEntriesBetween()| in the
-  // disk cache backend interface.
-  scoped_ptr<HashList> GetEntriesBetween(const base::Time initial_time,
-                                         const base::Time end_time);
-
-  // Returns the list of all entries key hash.
-  scoped_ptr<HashList> GetAllHashes();
-
-  // Returns number of indexed entries.
-  int32 GetEntryCount() const;
-
-  // Returns whether the index has been initialized yet.
-  bool initialized() const { return initialized_; }
-
- private:
-  friend class SimpleIndexTest;
-  FRIEND_TEST_ALL_PREFIXES(SimpleIndexTest, IndexSizeCorrectOnMerge);
-  FRIEND_TEST_ALL_PREFIXES(SimpleIndexTest, DiskWriteQueued);
-  FRIEND_TEST_ALL_PREFIXES(SimpleIndexTest, DiskWriteExecuted);
-  FRIEND_TEST_ALL_PREFIXES(SimpleIndexTest, DiskWritePostponed);
-
-  void StartEvictionIfNeeded();
-  void EvictionDone(int result);
-
-  void PostponeWritingToDisk();
-
-  void UpdateEntryIteratorSize(EntrySet::iterator* it, int64 entry_size);
-
-  // Must run on IO Thread.
-  void MergeInitializingSet(scoped_ptr<SimpleIndexLoadResult> load_result);
-
-#if defined(OS_ANDROID)
-  void OnApplicationStateChange(base::android::ApplicationState state);
-
-  scoped_ptr<base::android::ApplicationStatusListener> app_status_listener_;
-#endif
-
-  // The owner of |this| must ensure the |delegate_| outlives |this|.
-  SimpleIndexDelegate* delegate_;
-
-  EntrySet entries_set_;
-
-  const net::CacheType cache_type_;
-  uint64 cache_size_;  // Total cache storage size in bytes.
-  uint64 max_size_;
-  uint64 high_watermark_;
-  uint64 low_watermark_;
-  bool eviction_in_progress_;
-  base::TimeTicks eviction_start_time_;
-
-  // This stores all the entry_hash of entries that are removed during
-  // initialization.
-  base::hash_set<uint64> removed_entries_;
-  bool initialized_;
-
-  scoped_ptr<SimpleIndexFile> index_file_;
-
-  scoped_refptr<base::SingleThreadTaskRunner> io_thread_;
-
-  // All nonstatic SimpleEntryImpl methods should always be called on the IO
-  // thread, in all cases. |io_thread_checker_| documents and enforces this.
-  base::ThreadChecker io_thread_checker_;
-
-  // Timestamp of the last time we wrote the index to disk.
-  // PostponeWritingToDisk() may give up postponing and allow the write if it
-  // has been a while since last time we wrote.
-  base::TimeTicks last_write_to_disk_;
-
-  base::OneShotTimer<SimpleIndex> write_to_disk_timer_;
-  base::Closure write_to_disk_cb_;
-
-  typedef std::list<net::CompletionCallback> CallbackList;
-  CallbackList to_run_when_initialized_;
-
-  // Set to true when the app is on the background. When the app is in the
-  // background we can write the index much more frequently, to insure fresh
-  // index on next startup.
-  bool app_on_background_;
-};
-
-}  // namespace disk_cache
-
-#endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_INDEX_H_