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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_UTIL_TIME_H
#define BITCOIN_UTIL_TIME_H
#include <compat/compat.h>
#include <chrono>
#include <cstdint>
#include <string>
using namespace std::chrono_literals;
/** Mockable clock in the context of tests, otherwise the system clock */
struct NodeClock : public std::chrono::system_clock {
using time_point = std::chrono::time_point<NodeClock>;
/** Return current system time or mocked time, if set */
static time_point now() noexcept;
static std::time_t to_time_t(const time_point&) = delete; // unused
static time_point from_time_t(std::time_t) = delete; // unused
};
using NodeSeconds = std::chrono::time_point<NodeClock, std::chrono::seconds>;
using SteadyClock = std::chrono::steady_clock;
using SteadySeconds = std::chrono::time_point<std::chrono::steady_clock, std::chrono::seconds>;
using SteadyMilliseconds = std::chrono::time_point<std::chrono::steady_clock, std::chrono::milliseconds>;
using SteadyMicroseconds = std::chrono::time_point<std::chrono::steady_clock, std::chrono::microseconds>;
void UninterruptibleSleep(const std::chrono::microseconds& n);
/**
* Helper to count the seconds of a duration/time_point.
*
* All durations/time_points should be using std::chrono and calling this should generally
* be avoided in code. Though, it is still preferred to an inline t.count() to
* protect against a reliance on the exact type of t.
*
* This helper is used to convert durations/time_points before passing them over an
* interface that doesn't support std::chrono (e.g. RPC, debug log, or the GUI)
*/
template <typename Dur1, typename Dur2>
constexpr auto Ticks(Dur2 d)
{
return std::chrono::duration_cast<Dur1>(d).count();
}
template <typename Duration, typename Timepoint>
constexpr auto TicksSinceEpoch(Timepoint t)
{
return Ticks<Duration>(t.time_since_epoch());
}
constexpr int64_t count_seconds(std::chrono::seconds t) { return t.count(); }
constexpr int64_t count_milliseconds(std::chrono::milliseconds t) { return t.count(); }
constexpr int64_t count_microseconds(std::chrono::microseconds t) { return t.count(); }
using SecondsDouble = std::chrono::duration<double, std::chrono::seconds::period>;
/**
* DEPRECATED
* Use either ClockType::now() or Now<TimePointType>() if a cast is needed.
* ClockType is
* - std::chrono::steady_clock for steady time
* - std::chrono::system_clock for system time
* - NodeClock for mockable system time
*/
int64_t GetTime();
/** Returns the system time (not mockable) */
int64_t GetTimeMillis();
/** Returns the system time (not mockable) */
int64_t GetTimeMicros();
/**
* DEPRECATED
* Use SetMockTime with chrono type
*
* @param[in] nMockTimeIn Time in seconds.
*/
void SetMockTime(int64_t nMockTimeIn);
/** For testing. Set e.g. with the setmocktime rpc, or -mocktime argument */
void SetMockTime(std::chrono::seconds mock_time_in);
/** For testing */
std::chrono::seconds GetMockTime();
/**
* Return the current time point cast to the given precision. Only use this
* when an exact precision is needed, otherwise use T::clock::now() directly.
*/
template <typename T>
T Now()
{
return std::chrono::time_point_cast<typename T::duration>(T::clock::now());
}
/** DEPRECATED, see GetTime */
template <typename T>
T GetTime()
{
return Now<std::chrono::time_point<NodeClock, T>>().time_since_epoch();
}
/**
* ISO 8601 formatting is preferred. Use the FormatISO8601{DateTime,Date}
* helper functions if possible.
*/
std::string FormatISO8601DateTime(int64_t nTime);
std::string FormatISO8601Date(int64_t nTime);
int64_t ParseISO8601DateTime(const std::string& str);
/**
* Convert milliseconds to a struct timeval for e.g. select.
*/
struct timeval MillisToTimeval(int64_t nTimeout);
/**
* Convert milliseconds to a struct timeval for e.g. select.
*/
struct timeval MillisToTimeval(std::chrono::milliseconds ms);
/** Sanity check epoch match normal Unix epoch */
bool ChronoSanityCheck();
#endif // BITCOIN_UTIL_TIME_H
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