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//
// Clock.cpp
//
// Library: Foundation
// Package: DateTime
// Module: Clock
//
// Copyright (c) 2013, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Clock.h"
#include "Poco/Exception.h"
#include "Poco/Timestamp.h"
#if defined(__MACH__)
#include <mach/mach.h>
#include <mach/clock.h>
#elif defined(POCO_OS_FAMILY_UNIX)
#include <time.h>
#include <unistd.h>
#elif defined(POCO_VXWORKS)
#include <timers.h>
#elif defined(POCO_OS_FAMILY_WINDOWS)
#include "Poco/UnWindows.h"
#endif
#include <algorithm>
#undef min
#undef max
#include <limits>
#ifndef POCO_HAVE_CLOCK_GETTIME
#if (defined(_POSIX_TIMERS) && defined(CLOCK_REALTIME)) || defined(POCO_VXWORKS) || defined(__QNX__)
#ifndef __APPLE__ // See GitHub issue #1453 - not available before Mac OS 10.12/iOS 10
#define POCO_HAVE_CLOCK_GETTIME
#endif
#endif
#endif
namespace Poco {
const Clock::ClockVal Clock::CLOCKVAL_MIN = std::numeric_limits<Clock::ClockVal>::min();
const Clock::ClockVal Clock::CLOCKVAL_MAX = std::numeric_limits<Clock::ClockVal>::max();
Clock::Clock()
{
update();
}
Clock::Clock(ClockVal tv)
{
_clock = tv;
}
Clock::Clock(const Clock& other)
{
_clock = other._clock;
}
Clock::~Clock()
{
}
Clock& Clock::operator = (const Clock& other)
{
_clock = other._clock;
return *this;
}
Clock& Clock::operator = (ClockVal tv)
{
_clock = tv;
return *this;
}
void Clock::swap(Clock& timestamp)
{
std::swap(_clock, timestamp._clock);
}
void Clock::update()
{
#if defined(POCO_OS_FAMILY_WINDOWS)
LARGE_INTEGER perfCounter;
LARGE_INTEGER perfFreq;
if (QueryPerformanceCounter(&perfCounter) && QueryPerformanceFrequency(&perfFreq))
{
_clock = resolution()*(perfCounter.QuadPart/perfFreq.QuadPart);
_clock += (perfCounter.QuadPart % perfFreq.QuadPart)*resolution()/perfFreq.QuadPart;
}
else throw Poco::SystemException("cannot get system clock");
#elif defined(__MACH__)
clock_serv_t cs;
mach_timespec_t ts;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cs);
clock_get_time(cs, &ts);
mach_port_deallocate(mach_task_self(), cs);
_clock = ClockVal(ts.tv_sec)*resolution() + ts.tv_nsec/1000;
#elif defined(POCO_VXWORKS)
struct timespec ts;
#if defined(CLOCK_MONOTONIC) // should be in VxWorks 6.x
if (clock_gettime(CLOCK_MONOTONIC, &ts))
throw SystemException("cannot get system clock");
#else
if (clock_gettime(CLOCK_REALTIME, &ts))
throw SystemException("cannot get system clock");
#endif
_clock = ClockVal(ts.tv_sec)*resolution() + ts.tv_nsec/1000;
#elif defined(POCO_HAVE_CLOCK_GETTIME)
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
throw SystemException("cannot get system clock");
_clock = ClockVal(ts.tv_sec)*resolution() + ts.tv_nsec/1000;
#else
Poco::Timestamp now;
_clock = now.epochMicroseconds();
#endif
}
Clock::ClockDiff Clock::accuracy()
{
#if defined(POCO_OS_FAMILY_WINDOWS)
LARGE_INTEGER perfFreq;
if (QueryPerformanceFrequency(&perfFreq) && perfFreq.QuadPart > 0)
{
ClockVal acc = resolution()/perfFreq.QuadPart;
return acc > 0 ? acc : 1;
}
else throw Poco::SystemException("cannot get system clock accuracy");
#elif defined(__MACH__)
clock_serv_t cs;
int nanosecs;
mach_msg_type_number_t n = 1;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cs);
clock_get_attributes(cs, CLOCK_GET_TIME_RES, (clock_attr_t)&nanosecs, &n);
mach_port_deallocate(mach_task_self(), cs);
ClockVal acc = nanosecs/1000;
return acc > 0 ? acc : 1;
#elif defined(POCO_VXWORKS)
struct timespec ts;
#if defined(CLOCK_MONOTONIC) // should be in VxWorks 6.x
if (clock_getres(CLOCK_MONOTONIC, &ts))
throw SystemException("cannot get system clock");
#else
if (clock_getres(CLOCK_REALTIME, &ts))
throw SystemException("cannot get system clock");
#endif
ClockVal acc = ClockVal(ts.tv_sec)*resolution() + ts.tv_nsec/1000;
return acc > 0 ? acc : 1;
#elif defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
struct timespec ts;
if (clock_getres(CLOCK_MONOTONIC, &ts))
throw SystemException("cannot get system clock");
ClockVal acc = ClockVal(ts.tv_sec)*resolution() + ts.tv_nsec/1000;
return acc > 0 ? acc : 1;
#else
return 1000;
#endif
}
bool Clock::monotonic()
{
#if defined(POCO_OS_FAMILY_WINDOWS)
return true;
#elif defined(__MACH__)
return true;
#elif defined(POCO_VXWORKS)
#if defined(CLOCK_MONOTONIC) // should be in VxWorks 6.x
return true;
#else
return false;
#endif
#elif defined(_POSIX_TIMERS) && defined(_POSIX_MONOTONIC_CLOCK)
return true;
#else
return false;
#endif
}
} // namespace Poco
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