Disk cache: Add a method to cancel pending sparse operations....

net/disk_cache/mem_entry_impl.h

 // Copyright (c) 2006-2009 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_MEM_ENTRY_IMPL_H_
 #define NET_DISK_CACHE_MEM_ENTRY_IMPL_H_
 
 #include "base/hash_tables.h"
 #include "base/scoped_ptr.h"
 #include "net/disk_cache/disk_cache.h"
@@ skipping 50 matching lines @@
   virtual int ReadData(int index, int offset, net::IOBuffer* buf, int buf_len,
                        net::CompletionCallback* completion_callback);
   virtual int WriteData(int index, int offset, net::IOBuffer* buf, int buf_len,
                         net::CompletionCallback* completion_callback,
                         bool truncate);
   virtual int ReadSparseData(int64 offset, net::IOBuffer* buf, int buf_len,
                              net::CompletionCallback* completion_callback);
   virtual int WriteSparseData(int64 offset, net::IOBuffer* buf, int buf_len,
                               net::CompletionCallback* completion_callback);
   virtual int GetAvailableRange(int64 offset, int len, int64* start);
+  virtual void CancelSparseIO() {}
+  virtual int ReadyForSparseIO(net::CompletionCallback* completion_callback);
 
   // Performs the initialization of a EntryImpl that will be added to the
   // cache.
   bool CreateEntry(const std::string& key);
 
   // Permanently destroys this entry.
   void InternalDoom();
 
   void Open();
   bool InUse();
@@ skipping 73 matching lines @@
   base::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_