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      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 blink {
     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 blink::WebDiscardableMemory) {
     24  public:
     25   virtual ~WebDiscardableMemoryImpl();
     26 
     27   static scoped_ptr<WebDiscardableMemoryImpl> CreateLockedMemory(size_t size);
     28 
     29   // blink::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_
     45