62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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/*
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Copyright (C) 1998-99 Paul Barton-Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#ifndef __precision_timer_h__
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#define __precision_timer_h__
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#include <pbd/cycles.h>
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typedef cycles_t precision_time_t;
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class PrecisionTimer {
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public:
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PrecisionTimer ();
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/* returns current time in microseconds since
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the time base was created (which may be
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the same as when the PrecisionTimer was
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created or it may not).
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*/
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#ifdef PBD_HAVE_CYCLE_COUNTER
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precision_time_t current () {
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return get_cycles() / cycles_per_usec;
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}
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#else /* !HAVE_CYCLE_COUNTER */
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precision_time_t current () {
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struct timeval now;
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gettimeofday (&now, 0);
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return (precision_time_t) ((now.tv_sec * 1000000) + now.tv_usec);
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}
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#endif /* HAVE_CYCLE_COUNTER */
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private:
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int get_mhz();
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static precision_time_t cycles_per_usec;
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};
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#endif // __precision_timer.h
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