mirror of
https://gitee.com/mirrors_PX4/PX4-Autopilot.git
synced 2026-05-17 17:37:35 +08:00
Pavel Kirienko
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
|
|
* System clock driver interface.
|
|
* Copyright (C) 2014 Pavel Kirienko <pavel.kirienko@gmail.com>
|
|
*/
|
|
|
|
#ifndef UAVCAN_DRIVER_SYSTEM_CLOCK_HPP_INCLUDED
|
|
#define UAVCAN_DRIVER_SYSTEM_CLOCK_HPP_INCLUDED
|
|
|
|
#include <uavcan/std.hpp>
|
|
#include <uavcan/build_config.hpp>
|
|
#include <uavcan/time.hpp>
|
|
|
|
namespace uavcan
|
|
{
|
|
|
|
/**
|
|
* System clock interface - monotonic and UTC.
|
|
*/
|
|
class UAVCAN_EXPORT ISystemClock
|
|
{
|
|
public:
|
|
virtual ~ISystemClock() { }
|
|
|
|
/**
|
|
* Monototic system clock.
|
|
* This shall never jump during UTC timestamp adjustments; the base time is irrelevant.
|
|
* On POSIX systems use clock_gettime() with CLOCK_MONOTONIC.
|
|
*/
|
|
virtual MonotonicTime getMonotonic() const = 0;
|
|
|
|
/**
|
|
* UTC clock.
|
|
* This can jump when the UTC timestamp is being adjusted.
|
|
* Return 0 if the UTC time is not available yet (e.g. the device just started up with no battery clock).
|
|
* On POSIX systems use gettimeofday().
|
|
*/
|
|
virtual UtcTime getUtc() const = 0;
|
|
|
|
/**
|
|
* Set the UTC system clock.
|
|
* @param [in] adjustment Amount of time to add to the clock value.
|
|
* For POSIX refer to adjtime(), settimeofday().
|
|
*/
|
|
virtual void adjustUtc(UtcDuration adjustment) = 0;
|
|
};
|
|
|
|
}
|
|
|
|
#endif // UAVCAN_DRIVER_SYSTEM_CLOCK_HPP_INCLUDED
|