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/**
* Copyright (c) 2013, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SRC_COMPONENTS_HMI_MESSAGE_HANDLER_INCLUDE_HMI_MESSAGE_HANDLER_HMI_MESSAGE_HANDLER_IMPL_H_
#define SRC_COMPONENTS_HMI_MESSAGE_HANDLER_INCLUDE_HMI_MESSAGE_HANDLER_HMI_MESSAGE_HANDLER_IMPL_H_
#include <set>
#include "hmi_message_handler/hmi_message_adapter.h"
#include "hmi_message_handler/hmi_message_handler.h"
#include "utils/macro.h"
#include "utils/message_queue.h"
#include "utils/prioritized_queue.h"
#include "utils/threads/message_loop_thread.h"
#include "utils/threads/thread.h"
#include "utils/singleton.h"
namespace hmi_message_handler {
namespace impl {
/*
* These dummy classes are here to locally impose strong typing on different
* kinds of messages
* Currently there is no type difference between incoming and outgoing messages
* TODO(ik): replace these with globally defined message types
* when we have them.
*/
struct MessageFromHmi: public MessageSharedPointer {
MessageFromHmi(const MessageSharedPointer& message)
: MessageSharedPointer(message) {}
// PrioritizedQueue requres this method to decide which priority to assign
size_t PriorityOrder() const { return (*this)->Priority().OrderingValue(); }
};
struct MessageToHmi: public MessageSharedPointer {
MessageToHmi(const MessageSharedPointer& message)
: MessageSharedPointer(message) {}
// PrioritizedQueue requres this method to decide which priority to assign
size_t PriorityOrder() const { return (*this)->Priority().OrderingValue(); }
};
typedef threads::MessageLoopThread<
utils::PrioritizedQueue<MessageFromHmi> > FromHmiQueue;
typedef threads::MessageLoopThread<
utils::PrioritizedQueue<MessageToHmi> > ToHmiQueue;
}
class ToHMIThreadImpl;
class FromHMIThreadImpl;
class HMIMessageHandlerImpl
: public HMIMessageHandler,
public impl::FromHmiQueue::Handler,
public impl::ToHmiQueue::Handler,
public utils::Singleton<HMIMessageHandlerImpl> {
public:
~HMIMessageHandlerImpl();
void OnMessageReceived(MessageSharedPointer message);
void SendMessageToHMI(MessageSharedPointer message);
void set_message_observer(HMIMessageObserver* observer);
void OnErrorSending(MessageSharedPointer message);
void AddHMIMessageAdapter(HMIMessageAdapter* adapter);
void RemoveHMIMessageAdapter(HMIMessageAdapter* adapter);
private:
HMIMessageHandlerImpl();
// threads::MessageLoopThread<*>::Handler implementations
// CALLED ON messages_from_hmi_ THREAD!
virtual void Handle(const impl::MessageFromHmi message) OVERRIDE;
// CALLED ON messages_to_hmi_ THREAD!
virtual void Handle(const impl::MessageToHmi message) OVERRIDE;
private:
HMIMessageObserver* observer_;
mutable sync_primitives::Lock observer_locker_;
std::set<HMIMessageAdapter*> message_adapters_;
// Construct message threads when everything is already created
// Thread that pumps messages being passed to hmi.
impl::ToHmiQueue messages_to_hmi_;
// Thread that pumps messages coming from hmi.
impl::FromHmiQueue messages_from_hmi_;
DISALLOW_COPY_AND_ASSIGN(HMIMessageHandlerImpl);
FRIEND_BASE_SINGLETON_CLASS(HMIMessageHandlerImpl);
};
} // namespace hmi_message_handler
#endif // SRC_COMPONENTS_HMI_MESSAGE_HANDLER_INCLUDE_HMI_MESSAGE_HANDLER_HMI_MESSAGE_HANDLER_IMPL_H_
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