skia/ext/SkDiscardableMemory_chrome.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SKIA_EXT_SK_DISCARDABLE_MEMORY_CHROME_H_
   6 #define SKIA_EXT_SK_DISCARDABLE_MEMORY_CHROME_H_
   7
   8 #include "base/memory/discardable_memory.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "third_party/skia/src/core/SkDiscardableMemory.h"
  11
  12 // This class implements the SkDiscardableMemory interface using
  13 // base::DiscardableMemory.
  14 class SK_API SkDiscardableMemoryChrome : public SkDiscardableMemory {
  15 public:
  16   SkDiscardableMemoryChrome();
  17   virtual ~SkDiscardableMemoryChrome();
  18
  19   // Initialize the SkDiscardableMemoryChrome object and lock the memory.
  20   // Returns true on success. No memory is allocated if this call returns
  21   // false. This call should only be called once.
  22   bool InitializeAndLock(size_t bytes);
  23
  24   // Implementation of SkDiscardableMemory interface.
  25   virtual bool lock() OVERRIDE;
  26   virtual void* data() OVERRIDE;
  27   virtual void unlock() OVERRIDE;
  28
  29 private:
  30   scoped_ptr<base::DiscardableMemory> discardable_;
  31 };
  32
  33 #endif  // SKIA_EXT_SK_DISCARDABLE_MEMORY_CHROME_H_