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/*
* Copyright (c) [2012-2015] Novell, Inc.
*
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as published
* by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, contact Novell, Inc.
*
* To contact Novell about this file by physical or electronic mail, you may
* find current contact information at www.novell.com.
*/
#include "RefCounter.h"
RefCounter::RefCounter()
: last_used(steady_clock::now())
{
}
int
RefCounter::inc_use_count()
{
boost::lock_guard<boost::mutex> lock(mutex);
return ++counter;
}
int
RefCounter::dec_use_count()
{
boost::lock_guard<boost::mutex> lock(mutex);
assert(counter > 0);
if (--counter == 0)
last_used = steady_clock::now();
return counter;
}
void
RefCounter::update_use_time()
{
boost::lock_guard<boost::mutex> lock(mutex);
last_used = steady_clock::now();
}
int
RefCounter::use_count() const
{
boost::lock_guard<boost::mutex> lock(mutex);
return counter;
}
milliseconds
RefCounter::unused_for() const
{
boost::lock_guard<boost::mutex> lock(mutex);
if (counter != 0)
return milliseconds(0);
return duration_cast<milliseconds>(steady_clock::now() - last_used);
}
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