vos/corelibs/vos/timer.hh

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/*
    This file is part of the Virtual Object System of
    the Interreality project (http://interreality.org).

    Copyright (C) 2001-2003 Peter Amstutz

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

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA

    Peter Amstutz <tetron@interreality.org>
*/
#ifndef _TIMER_HH_
#define _TIMER_HH_

#include <vos/corelibs/vos/vosdefs.hh>

namespace VOS
{
/** Get the current time in seconds from the underlying operating
    system call. */
VOS_API double getRealTime();

/** Get a timer time in seconds.  This is based on the "real" time,
    but it is guaranteed to always increase between calls.  This is
    necessary to smooth over some odd behavior in certain operating
    system / hardware combinations where the clock can actually run
    backwards over short, subsecond periods of time!
*/
VOS_API double getTimer();
}

#endif

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