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/*
Copyright (C) 2002 Andrew Morton
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.
$Id$
*/
#include <cstdio>
#include <pbd/error.h>
#include <ardour/cycle_timer.h>
#include "i18n.h"
using namespace PBD;
float CycleTimer::cycles_per_usec = 0;
float
CycleTimer::get_mhz()
{
FILE *f;
if ((f = fopen("/proc/cpuinfo", "r")) == 0) {
fatal << _("CycleTimer::get_mhz(): can't open /proc/cpuinfo") << endmsg;
/*NOTREACHED*/
return 0.0f;
}
while (true) {
float mhz;
int ret;
char buf[1000];
if (fgets (buf, sizeof(buf), f) == 0) {
fatal << _("CycleTimer::get_mhz(): cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
/*NOTREACHED*/
return 0.0f;
}
#ifdef __powerpc__
int imhz;
/* why can't the PPC crew standardize their /proc/cpuinfo format ? */
ret = sscanf (buf, "clock\t: %dMHz", &imhz);
mhz = (float) imhz;
#else /* XXX don't assume its x86 just because its not power pc */
ret = sscanf (buf, "cpu MHz : %f", &mhz);
#endif
if (ret == 1) {
fclose(f);
return mhz;
}
}
fatal << _("cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
/*NOTREACHED*/
return 0.0f;
}
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