Add net to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 110 insertions, 0 deletions

diff --git a/net/disk_cache/mem_entry_impl.h b/net/disk_cache/mem_entry_impl.h
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+++ b/net/disk_cache/mem_entry_impl.h
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+// Copyright 2008, Google 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:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * 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.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+// OWNER OR 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 NET_DISK_CACHE_MEM_ENTRY_IMPL_H__
+#define NET_DISK_CACHE_MEM_ENTRY_IMPL_H__
+
+#include "net/disk_cache/disk_cache.h"
+
+namespace disk_cache {
+
+class MemBackendImpl;
+
+// This class implements the Entry interface for the memory-only cache. An
+// object of this class represents a single entry on the cache.
+class MemEntryImpl : public Entry {
+ public:
+  explicit MemEntryImpl(MemBackendImpl* backend);
+
+  // Entry interface.
+  virtual void Doom();
+  virtual void Close();
+  virtual std::string GetKey() const;
+  virtual Time GetLastUsed() const;
+  virtual Time GetLastModified() const;
+  virtual int32 GetDataSize(int index) const;
+  virtual int ReadData(int index, int offset, char* buf, int buf_len,
+                       net::CompletionCallback* completion_callback);
+  virtual int WriteData(int index, int offset, const char* buf, int buf_len,
+                        net::CompletionCallback* completion_callback,
+                        bool truncate);
+
+  // Performs the initialization of a EntryImpl that will be added to the
+  // cache.
+  bool CreateEntry(const std::string& key);
+
+  // Permamently destroys this entry
+  void InternalDoom();
+
+  MemEntryImpl* next() const {
+    return next_;
+  }
+
+  MemEntryImpl* prev() const {
+    return prev_;
+  }
+
+  void set_next(MemEntryImpl* next) {
+    next_ = next;
+  }
+
+  void set_prev(MemEntryImpl* prev) {
+    prev_ = prev;
+  }
+
+  void Open();
+  bool InUse();
+
+ private:
+  ~MemEntryImpl();
+
+  // Grows and cleans up the data buffer.
+  void PrepareTarget(int index, int offset, int buf_len);
+
+  // Updates ranking information.
+  void UpdateRank(bool modified);
+
+  std::string key_;
+  std::vector<char> data_[2];  // User data.
+  int32 data_size_[2];
+  int ref_count_;
+
+  MemEntryImpl* next_;         // Pointers for the LRU list.
+  MemEntryImpl* prev_;
+  Time last_modified_;         // LRU information.
+  Time last_used_;
+  MemBackendImpl* backend_;    // Back pointer to the cache.
+  bool doomed_;                // True if this entry was removed from the cache.
+
+  DISALLOW_EVIL_CONSTRUCTORS(MemEntryImpl);
+};
+
+}  // namespace disk_cache
+
+#endif  // NET_DISK_CACHE_MEM_ENTRY_IMPL_H__