LockStatistics.hh

//********************************************************************
//*** Thread/LockStatistics.hh
//*** Copyright (c) 2003-2009 by Markus Winand <mws@fatalmind.com>
//*** $Id: LockStatistics.hh,v 1.14 2009-03-02 14:16:46 mws Exp $
//********************************************************************
/*
This file is part of ResourcePool.

ResourcePool is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2 of 
the License, or (at your option) any later version.

ResourcePool 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 ResourcePool; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307  USA */

#ifndef INCLUDED_THREAD_LOCKSTATISTICS_HH
#define INCLUDED_THREAD_LOCKSTATISTICS_HH

#ifndef INCLUDED_THREAD_LOCKSTATISTICSFWD_HH
#include "LockStatisticsFwd.hh"
#endif

#ifndef POSIX_TIMERFWD_HH
#include "POSIX/timerFwd.hh"
#endif

#ifndef INCLUDED_THREAD_LOCKFWD_HH
#include "LockFwd.hh"
#endif

#include <iosfwd>

namespace fatalmind {

class LockUsageStatistics {
    public:
        inline LockUsageStatistics()
        : _lock(0)
        , _reclev(0)
        , _maxreclev(0)
        {
        }
        
        inline void stat_lock() {
            ++_lock;
            ++_reclev;
        }

        inline void stat_unlock() {
            if (_reclev > _maxreclev) {
                _maxreclev = _reclev;
            }
            --_reclev;
        }

    friend std::ostream& operator<<(std::ostream& o, const LockUsageStatistics& s);
    private:
        int _lock;
        int _reclev;
        int _maxreclev;
};

} // namespace fatalmind

#ifndef POSIX_TIME_HH
#include "POSIX/time.hh"
#endif

namespace fatalmind {

class LockTimingStatistics {
    public:
        inline LockTimingStatistics()
        : _waittime()
        {};
        typedef timer<MultiThreadedModel<LockStatistics<NopLockUsageStatistics,NopLockTimingStatistics> >, SingleThreadedModel<LockStatistics<NopLockUsageStatistics, NopLockTimingStatistics> > > _timer_t;
        POSIX::timespec<MultiThreadedModel<LockStatistics<NopLockUsageStatistics, NopLockTimingStatistics> > > _waittime;
    friend
        std::ostream& operator<<(std::ostream& o, const LockTimingStatistics& s);
};

} // namespace fatalmind

#endif

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