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https://github.com/irungentoo/toxcore.git
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43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <mach/mach_time.h>
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#define timebase mach_absolute_time
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static int cpumib[2] = { CTL_HW, HW_CPU_FREQ } ;
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static int tbmib[2] = { CTL_HW, HW_TB_FREQ } ;
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static long myround(double u)
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{
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long result = u;
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while (result + 0.5 < u) result += 1;
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while (result - 0.5 > u) result -= 1;
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return result;
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}
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static long tbcycles = 0;
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static void init(void)
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{
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unsigned int cpufrequency = 0; size_t cpufrequencylen = sizeof(unsigned int);
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unsigned int tbfrequency = 0; size_t tbfrequencylen = sizeof(unsigned int);
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sysctl(cpumib,2,&cpufrequency,&cpufrequencylen,0,0);
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sysctl(tbmib,2,&tbfrequency,&tbfrequencylen,0,0);
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if (tbfrequency > 0)
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tbcycles = myround((double) (unsigned long long) cpufrequency
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/ (double) (unsigned long long) tbfrequency);
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}
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long long cpucycles_powerpcmacos(void)
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{
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if (!tbcycles) init();
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return timebase() * tbcycles;
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}
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long long cpucycles_powerpcmacos_persecond(void)
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{
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unsigned int result = 0; size_t resultlen = sizeof(unsigned int);
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sysctl(cpumib,2,&result,&resultlen,0,0);
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return (unsigned long long) result;
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}
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