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