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/*
Copyright (C) 1998-99 Paul Barton-Davis
This program 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.
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
*/
#ifndef __precision_timer_h__
#define __precision_timer_h__
#include <pbd/cycles.h>
typedef cycles_t precision_time_t;
class PrecisionTimer {
public:
PrecisionTimer ();
/* returns current time in microseconds since
the time base was created (which may be
the same as when the PrecisionTimer was
created or it may not).
*/
#ifdef PBD_HAVE_CYCLE_COUNTER
precision_time_t current () {
return get_cycles() / cycles_per_usec;
}
#else /* !HAVE_CYCLE_COUNTER */
precision_time_t current () {
struct timeval now;
gettimeofday (&now, 0);
return (precision_time_t) ((now.tv_sec * 1000000) + now.tv_usec);
}
#endif /* HAVE_CYCLE_COUNTER */
private:
int get_mhz();
static precision_time_t cycles_per_usec;
};
#endif // __precision_timer.h
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