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