content/child/web_discardable_memory_impl.h

   1 // Copyright 2014 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 CONTENT_CHILD_WEB_DISCARDABLE_MEMORY_IMPL_H_
   6 #define CONTENT_CHILD_WEB_DISCARDABLE_MEMORY_IMPL_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "third_party/WebKit/public/platform/WebDiscardableMemory.h"
  11
  12 namespace base {
  13 class DiscardableMemory;
  14 }
  15
  16 namespace content {
  17
  18 // Implementation of WebDiscardableMemory that is responsible for allocating
  19 // discardable memory.
  20 class WebDiscardableMemoryImpl : public blink::WebDiscardableMemory {
  21  public:
  22   virtual ~WebDiscardableMemoryImpl();
  23
  24   static scoped_ptr<WebDiscardableMemoryImpl> CreateLockedMemory(size_t size);
  25
  26   // blink::WebDiscardableMemory:
  27   virtual bool lock();
  28   virtual void unlock();
  29   virtual void* data();
  30
  31  private:
  32   WebDiscardableMemoryImpl(scoped_ptr<base::DiscardableMemory> memory);
  33
  34   scoped_ptr<base::DiscardableMemory> discardable_;
  35
  36   DISALLOW_COPY_AND_ASSIGN(WebDiscardableMemoryImpl);
  37 };
  38
  39 }  // namespace content
  40
  41 #endif  // CONTENT_CHILD_WEB_DISCARDABLE_MEMORY_IMPL_H_