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The system watchdog monitors whether there is message traffic on the Bus. If no message was sent for an extended period of time, a reset will occur. It should also protect against system-wide hangs. On Linux, watchdog is simulated by a FreeRTOS task that will call exit on timeout.
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include "Message.hpp"
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#include "Watchdog.hpp"
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <vector>
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namespace sys
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{
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class Service; // Forward declaration
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class Bus; // Forward declaration
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class BusProxy
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{
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public:
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static constexpr auto defaultTimeout = 5000U;
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~BusProxy() noexcept;
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bool sendUnicast(std::shared_ptr<Message> message, const std::string &targetName);
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SendResult sendUnicast(std::shared_ptr<Message> message, const std::string &targetName, std::uint32_t timeout);
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void sendMulticast(std::shared_ptr<Message> message, BusChannel channel);
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void sendBroadcast(std::shared_ptr<Message> message);
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std::vector<BusChannel> channels;
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private:
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friend class Service;
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explicit BusProxy(Service *owner, Watchdog &watchdog);
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void sendResponse(std::shared_ptr<Message> response, std::shared_ptr<Message> request);
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void connect();
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void disconnect();
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Service *owner;
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Watchdog &watchdog;
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std::unique_ptr<Bus> busImpl;
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};
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} // namespace sys
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