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// Copyright (c) 2011 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 MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_
#define MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop_proxy.h"
#include "media/base/media_export.h"
class MessageLoop;
namespace media {
// Factory object that manages named MessageLoops.
class MEDIA_EXPORT MessageLoopFactory {
public:
// Get the message loop associated with |name|. A new MessageLoop
// is created if the factory doesn't have one associated with |name|.
// NULL is returned if |name| is an empty string, or a new
// MessageLoop needs to be created and a failure occurs during the
// creation process.
virtual MessageLoop* GetMessageLoop(const std::string& name) = 0;
// Get the message loop proxy associated with |name|. A new MessageLoopProxy
// is created if the factory doesn't have one associated with |name|.
// NULL is returned if |name| is an empty string, or a new
// MessageLoop needs to be created and a failure occurs during the
// creation process.
virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoopProxy(
const std::string& name) = 0;
protected:
// Only allow scoped_ptr<> to delete factory.
friend class scoped_ptr<MessageLoopFactory>;
virtual ~MessageLoopFactory();
};
} // namespace media
#endif // MEDIA_BASE_MESSAGE_LOOP_FACTORY_H_
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