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/*
Copyright (C) 2001-2003 Paul Davis
Copyright (C) 2004-2008 Grame
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.
*/
#include "JackTime.h"
#include "JackError.h"
#ifdef __APPLE__
double __jack_time_ratio;
/* This should only be called ONCE per process. */
void InitTime()
{
jack_log("InitTime");
mach_timebase_info_data_t info;
mach_timebase_info(&info);
__jack_time_ratio = ((float)info.numer / info.denom) / 1000;
}
#endif
#ifdef WIN32
EXPORT LARGE_INTEGER _jack_freq;
void InitTime()
{
QueryPerformanceFrequency(&_jack_freq);
jack_log("InitTime freq = %ld %ld", _jack_freq.HighPart, _jack_freq.LowPart);
_jack_freq.QuadPart = _jack_freq.QuadPart / 1000000; // by usec
}
jack_time_t GetMicroSeconds(void)
{
LARGE_INTEGER t1;
QueryPerformanceCounter (&t1);
return (jack_time_t)(((double)t1.QuadPart)/((double)_jack_freq.QuadPart));
}
// TODO
#endif
#ifdef linux
#ifdef GETCYCLE_TIME
#include <stdio.h>
jack_time_t GetMhz(void)
{
FILE *f = fopen("/proc/cpuinfo", "r");
if (f == 0) {
perror("can't open /proc/cpuinfo\n");
exit(1);
}
for (;;) {
jack_time_t mhz;
int ret;
char buf[1000];
if (fgets(buf, sizeof(buf), f) == NULL) {
jack_error ("FATAL: cannot locate cpu MHz in "
"/proc/cpuinfo\n");
exit(1);
}
#if defined(__powerpc__)
ret = sscanf(buf, "clock\t: %" SCNu64 "MHz", &mhz);
#elif defined( __i386__ ) || defined (__hppa__) || defined (__ia64__) || \
defined(__x86_64__)
ret = sscanf(buf, "cpu MHz : %" SCNu64, &mhz);
#elif defined( __sparc__ )
ret = sscanf(buf, "Cpu0Bogo : %" SCNu64, &mhz);
#elif defined( __mc68000__ )
ret = sscanf(buf, "Clocking: %" SCNu64, &mhz);
#elif defined( __s390__ )
ret = sscanf(buf, "bogomips per cpu: %" SCNu64, &mhz);
#else /* MIPS, ARM, alpha */
ret = sscanf(buf, "BogoMIPS : %" SCNu64, &mhz);
#endif
if (ret == 1) {
fclose(f);
return (jack_time_t)mhz;
}
}
}
jack_time_t __jack_cpu_mhz;
void InitTime()
{
__jack_cpu_mhz = GetMhz();
}
#else
void InitTime()
{}
#endif
#endif
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