54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
#ifndef WATCHDOG_WATCHDOG_H_
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#define WATCHDOG_WATCHDOG_H_
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#include <array>
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#include <chrono>
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#include <cstdint>
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#include <optional>
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#include <string>
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class WatchdogTask {
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public:
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enum class States { NOT_STARTED, RUNNING, SUSPENDED, FAULTY };
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enum class LoopResult {
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OK,
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START_REQ,
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START_WITH_WATCH_REQ,
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SUSPEND_REQ,
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CANCEL_REQ,
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TIMEOUT,
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HUNG_UP,
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FAULT
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};
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WatchdogTask();
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virtual ~WatchdogTask();
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int performOperation();
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private:
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int fd = 0;
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bool obswRunning = false;
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bool watchingObsw = false;
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bool printNotRunningLatch = false;
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std::array<uint8_t, 64> buf;
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std::optional<std::chrono::time_point<std::chrono::system_clock>> notRunningStart;
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States state = States::NOT_STARTED;
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// Primary loop. Takes care of delaying, and reading from the communication pipe and translating
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// messages to loop results.
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LoopResult watchdogLoop();
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bool stateMachine(LoopResult result);
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LoopResult pollEvent(struct pollfd& waiter);
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LoopResult parseCommand(ssize_t readLen);
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int performRunningOperation();
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int performNotRunningOperation(LoopResult type);
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int performSuspendOperation();
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};
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#endif /* WATCHDOG_WATCHDOG_H_ */
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