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// -*- C++ -*-
//
// Copyright (C) 2024, Vaclav Haisman. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modifica-
// tion, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
// DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef LOG4CPLUS_HELPERS_EVENTCOUNTER_H
#define LOG4CPLUS_HELPERS_EVENTCOUNTER_H
#include <log4cplus/config.hxx>
#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
#pragma once
#endif
#include <log4cplus/thread/syncprims.h>
#include <cstddef>
#include <atomic>
#include <chrono>
namespace log4cplus {
namespace helpers {
class LOG4CPLUS_EXPORT BaseEventCounter
{
public:
BaseEventCounter ();
virtual ~BaseEventCounter ();
virtual std::size_t record_event ();
protected:
std::atomic<std::size_t> event_count {0};
};
class LOG4CPLUS_EXPORT SteadyClockGate
: public BaseEventCounter
{
public:
using Clock = std::chrono::steady_clock;
using Duration = Clock::duration;
using TimePoint = std::chrono::time_point<Clock>;
struct LOG4CPLUS_EXPORT Info
{
~Info ();
std::size_t count;
Duration time_span;
};
SteadyClockGate (SteadyClockGate::Duration pause_duraiton);
virtual ~SteadyClockGate ();
bool latch_open (Info &);
private:
log4cplus::thread::SimpleMutex mtx;
Duration const pause_duration;
TimePoint timeout_point;
TimePoint prev_timeout_point;
};
} // namespace helpers
} // namespace log4cplus
#endif // LOG4CPLUS_HELPERS_EVENTCOUNTER_H
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