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// boost/chrono/stopwatches/suspendable_stopwatch.hpp ------------------------------------------------------------//
// Copyright 2011 Vicente J. Botet Escriba
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org/libs/libs/chrono/stopwatches for documentation.
#ifndef BOOST_CHRONO_STOPWATCHES_SUSPENDABLE_STOPWATCH__HPP
#define BOOST_CHRONO_STOPWATCHES_SUSPENDABLE_STOPWATCH__HPP
#include <boost/chrono/config.hpp>
#include <boost/chrono/stopwatches/stopwatch_scoped.hpp>
#include <boost/chrono/stopwatches/collectors/no_memory.hpp> // default laps_collector
#include <boost/chrono/stopwatches/dont_start.hpp>
#include <boost/chrono/detail/system.hpp>
#include <boost/chrono/system_clocks.hpp>
#include <utility>
namespace boost
{
namespace chrono
{
template<typename Clock=high_resolution_clock, typename LapsCollector=no_memory<typename Clock::duration> >
class suspendable_stopwatch
{
public:
typedef LapsCollector laps_collector;
typedef Clock clock;
typedef typename Clock::duration duration;
typedef typename Clock::time_point time_point;
typedef typename Clock::rep rep;
typedef typename Clock::period period;
BOOST_STATIC_CONSTEXPR bool is_steady = Clock::is_steady;
suspendable_stopwatch() :
start_(duration::zero()),
running_(false),
suspended_(false),
laps_collector_(),
partial_(duration::zero())
{
start();
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
explicit suspendable_stopwatch(
system::error_code & ec
) :
start_(duration::zero()),
running_(false),
suspended_(false),
laps_collector_(),
partial_(duration::zero())
{
start(ec);
}
#endif
explicit suspendable_stopwatch(
const dont_start_t&
) :
start_(duration::zero()),
running_(false),
suspended_(false),
laps_collector_(),
partial_(duration::zero())
{
}
explicit suspendable_stopwatch(
laps_collector const& acc
) :
start_(duration::zero()),
running_(false),
suspended_(false),
laps_collector_(acc),
partial_(duration::zero())
{
start();
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
explicit suspendable_stopwatch(
laps_collector const& acc,
system::error_code & ec
) :
start_(duration::zero()),
running_(false),
suspended_(false),
laps_collector_(acc),
partial_(duration::zero())
{
start(ec);
}
#endif
suspendable_stopwatch(
laps_collector const& acc,
const dont_start_t&
) :
start_(duration::zero()),
running_(false),
suspended_(false),
laps_collector_(acc),
partial_(duration::zero())
{
}
~suspendable_stopwatch()
{
stop();
}
void restart()
{
time_point tmp = clock::now();
if (running_)
{
partial_ += tmp - start_;
laps_collector_.store(partial_);
partial_ = duration::zero();
}
else
{
running_ = true;
}
start_ = tmp;
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
void restart(system::error_code & ec)
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
if (running_)
{
partial_ += tmp - start_;
laps_collector_.store(partial_);
partial_ = duration::zero();
}
else
{
running_ = true;
}
start_ = tmp;
}
#endif
void start()
{
start_ = clock::now();;
partial_ = duration::zero();
running_ = true;
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
void start(system::error_code & ec)
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
partial_ = duration::zero();
start_ = tmp;
running_ = true;
}
#endif
void stop()
{
partial_ += clock::now() - start_;
laps_collector_.store(partial_);
start_ = time_point(duration::zero());
running_ = false;
suspended_ = false;
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
void stop(system::error_code & ec)
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
partial_ += tmp - start_;
laps_collector_.store(partial_);
start_ = time_point(duration::zero());
running_ = false;
suspended_ = false;
}
#endif
void suspend()
{
if (is_running())
{
if (!suspended_)
{
partial_ += clock::now() - start_;
suspended_ = true;
}
}
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
void suspend(system::error_code & ec)
{
if (is_running())
{
if (!suspended_)
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
partial_ += tmp - start_;
suspended_ = true;
}
else
{
ec.clear();
}
} else
{
ec.clear();
}
}
#endif
void resume()
{
if (suspended_)
{
start_ = clock::now();
suspended_ = false;
}
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
void resume(system::error_code & ec)
{
if (suspended_)
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return;
start_ = tmp;
suspended_ = false;
} else
{
ec.clear();
}
}
#endif
bool is_running() const {
return running_;
}
bool is_suspended() const {
return suspended_;
}
duration elapsed() const
{
if (is_running())
{
if (suspended_) {
return partial_;
}
else
{
return partial_ + clock::now() - start_;
}
} else
{
return duration::zero();
}
}
#if !defined BOOST_CHRONO_DONT_PROVIDE_HYBRID_ERROR_HANDLING
duration elapsed(system::error_code & ec) const
{
if (is_running())
{
if (suspended_) {
return partial_;
}
else
{
time_point tmp = clock::now(ec);
if (!BOOST_CHRONO_IS_THROWS(ec) && ec) return duration::zero();
return partial_ + tmp - start_;
}
} else
{
return duration::zero();
}
}
#endif
void reset(
)
{
laps_collector_.reset();
running_ = false;
suspended_ = false;
partial_ = duration::zero();
start_ = time_point(duration::zero());
}
laps_collector const& get_laps_collector()
{
return laps_collector_;
}
typedef stopwatch_runner<suspendable_stopwatch<Clock, LapsCollector> >
scoped_run;
typedef stopwatch_stopper<suspendable_stopwatch<Clock, LapsCollector> >
scoped_stop;
typedef stopwatch_suspender<suspendable_stopwatch<Clock, LapsCollector> >
scoped_suspend;
typedef stopwatch_resumer<suspendable_stopwatch<Clock, LapsCollector> >
scoped_resume;
private:
time_point start_;
bool running_;
bool suspended_;
laps_collector laps_collector_;
duration partial_;
};
} // namespace chrono
} // namespace boost
#endif
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