eive-obsw/watchdog/Watchdog.h

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