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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef WEBKIT_GLUE_WEB_DISCARDABLE_MEMORY_IMPL_H_
#define WEBKIT_GLUE_WEB_DISCARDABLE_MEMORY_IMPL_H_
#include "base/memory/discardable_memory.h"
#include "base/memory/scoped_ptr.h"
#include "third_party/WebKit/public/platform/WebDiscardableMemory.h"
#include "webkit/glue/webkit_glue_export.h"
namespace WebKit {
class WebDiscardableMemory;
}
namespace webkit_glue {
// Implementation of WebDiscardableMemory that is responsible for allocating
// discardable memory.
class WEBKIT_GLUE_EXPORT WebDiscardableMemoryImpl
: NON_EXPORTED_BASE(public WebKit::WebDiscardableMemory) {
public:
WebDiscardableMemoryImpl();
virtual ~WebDiscardableMemoryImpl();
// WebKit::WebDiscardableMemory implementation.
virtual bool lock();
virtual void unlock();
virtual void* data();
// Initialize the WebDiscardableMemoryImpl object and lock the memory.
// Returns true on success. No memory is allocated if this call returns
// false. This call should only be called once.
bool InitializeAndLock(size_t size);
private:
scoped_ptr<base::DiscardableMemory> discardable_;
DISALLOW_COPY_AND_ASSIGN(WebDiscardableMemoryImpl);
};
} // namespace webkit_glue
#endif // WEBKIT_GLUE_WEB_DISCARDABLE_MEMORY_IMPL_H_
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