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time-unit-test-clock.cpp
Go to the documentation of this file.
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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#include "
time-unit-test-clock.hpp
"
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#include "
monotonic_deadline_timer.hpp
"
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#include <thread>
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namespace
ndn
{
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namespace
time
{
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const
std::chrono::microseconds
SLEEP_AFTER_TIME_CHANGE
(2);
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template
<
class
BaseClock>
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UnitTestClock<BaseClock>::UnitTestClock
(
const
nanoseconds& startTime)
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: m_currentTime(startTime)
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{
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}
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template
<
class
BaseClock>
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std::string
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UnitTestClock<BaseClock>::getSince
()
const
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{
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return
" since unit test clock advancements"
;
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}
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template
<
class
BaseClock>
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typename
BaseClock::time_point
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UnitTestClock<BaseClock>::getNow
()
const
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{
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return
typename
BaseClock::time_point(duration_cast<typename BaseClock::duration>(m_currentTime));
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}
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template
<
class
BaseClock>
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boost::posix_time::time_duration
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UnitTestClock<BaseClock>::toPosixDuration
(
const
typename
BaseClock::duration& duration)
const
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{
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return
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#ifdef BOOST_DATE_TIME_HAS_NANOSECONDS
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boost::posix_time::nanoseconds(1)
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#else
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boost::posix_time::microseconds(1)
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#endif
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;
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}
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template
<
class
BaseClock>
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void
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UnitTestClock<BaseClock>::advance
(
const
nanoseconds& duration)
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{
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m_currentTime += duration;
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// On some platforms, boost::asio::io_service for deadline_timer (e.g., the one used in
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// Scheduler) will call time_traits<>::now() and will "sleep" for
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// time_traits<>::to_posix_time(duration) period before calling time_traits<>::now()
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// again. (Note that such "sleep" will occur even if there is no actual waiting and
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// program is calling io_service.poll().)
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//
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// As a result, in order for the clock advancement to be effective, we must sleep for a
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// period greater than time_traits<>::to_posix_time().
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//
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// See also http://blog.think-async.com/2007/08/time-travel.html
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BOOST_ASSERT(boost::posix_time::microseconds(
SLEEP_AFTER_TIME_CHANGE
.count()) >
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boost::asio::time_traits<steady_clock>::to_posix_duration(duration));
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std::this_thread::sleep_for(
SLEEP_AFTER_TIME_CHANGE
);
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}
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template
<
class
BaseClock>
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void
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UnitTestClock<BaseClock>::setNow
(
const
nanoseconds& timeSinceEpoch)
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{
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BOOST_ASSERT(boost::posix_time::microseconds(
SLEEP_AFTER_TIME_CHANGE
.count()) >
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boost::asio::time_traits<steady_clock>::to_posix_duration(timeSinceEpoch -
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m_currentTime));
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m_currentTime = timeSinceEpoch;
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std::this_thread::sleep_for(
SLEEP_AFTER_TIME_CHANGE
);
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}
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template
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class
UnitTestClock<system_clock>
;
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template
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class
UnitTestClock<steady_clock>
;
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}
// namespace time
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}
// namespace ndn
ndn
Copyright (c) 2011-2015 Regents of the University of California.
Definition:
ndn-strategy-choice-helper.hpp:34
time-unit-test-clock.hpp
ndn::time::UnitTestClock::advance
void advance(const nanoseconds &duration)
Advance unit test clock by duration.
Definition:
time-unit-test-clock.cpp:67
ndn::time
Definition:
time-custom-clock.hpp:28
ndn::time::UnitTestClock
Clock that can be used in unit tests for time-dependent tests independent of wall clock...
Definition:
time-unit-test-clock.hpp:74
ndn::time::UnitTestClock::UnitTestClock
UnitTestClock(const nanoseconds &startTime=UnitTestClockTraits< BaseClock >::getDefaultStartTime())
Definition:
time-unit-test-clock.cpp:32
ndn::time::UnitTestClock::setNow
void setNow(const nanoseconds &timeSinceEpoch)
Explicitly set clock to timeSinceEpoch.
Definition:
time-unit-test-clock.cpp:88
ndn::time::UnitTestClock::toPosixDuration
virtual boost::posix_time::time_duration toPosixDuration(const typename BaseClock::duration &duration) const
Definition:
time-unit-test-clock.cpp:53
ndn::time::UnitTestClock::getNow
virtual BaseClock::time_point getNow() const
Definition:
time-unit-test-clock.cpp:46
ndn::time::UnitTestClock::getSince
virtual std::string getSince() const
Definition:
time-unit-test-clock.cpp:39
ndn::time::SLEEP_AFTER_TIME_CHANGE
const std::chrono::microseconds SLEEP_AFTER_TIME_CHANGE(2)
monotonic_deadline_timer.hpp
ndnSIM
ndn-cxx
src
util
time-unit-test-clock.cpp
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