src/webkit/child/web_discardable_memory_impl.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 WEBKIT_CHILD_WEB_DISCARDABLE_MEMORY_IMPL_H_
   6 #define WEBKIT_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 #include "webkit/child/webkit_child_export.h"
  13
  14 namespace WebKit {
  15 class WebDiscardableMemory;
  16 }
  17
  18 namespace webkit_glue {
  19
  20 // Implementation of WebDiscardableMemory that is responsible for allocating
  21 // discardable memory.
  22 class WEBKIT_CHILD_EXPORT WebDiscardableMemoryImpl
  23     : NON_EXPORTED_BASE(public WebKit::WebDiscardableMemory) {
  24  public:
  25   virtual ~WebDiscardableMemoryImpl();
  26
  27   static scoped_ptr<WebDiscardableMemoryImpl> CreateLockedMemory(size_t size);
  28
  29   // WebKit::WebDiscardableMemory:
  30   virtual bool lock();
  31   virtual void unlock();
  32   virtual void* data();
  33
  34  private:
  35   WebDiscardableMemoryImpl(scoped_ptr<base::DiscardableMemory> memory);
  36
  37   scoped_ptr<base::DiscardableMemory> discardable_;
  38
  39   DISALLOW_COPY_AND_ASSIGN(WebDiscardableMemoryImpl);
  40 };
  41
  42 }  // namespace webkit_glue
  43
  44 #endif  // WEBKIT_CHILD_WEB_DISCARDABLE_MEMORY_IMPL_H_