mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-22 06:27:51 +00:00
bf9710fd5a
This only affects build_android, if nacl-gcc-prep is run then build/`uname -s` will be created.
35 lines
692 B
C
35 lines
692 B
C
#include <time.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
static double cpufrequency = 0;
|
|
|
|
static void init(void)
|
|
{
|
|
long result = 0; size_t resultlen = sizeof(long);
|
|
sysctlbyname("machdep.tsc_freq",&result,&resultlen,0,0);
|
|
cpufrequency = result;
|
|
}
|
|
|
|
long long cpucycles_monotonic(void)
|
|
{
|
|
double result;
|
|
struct timespec t;
|
|
if (!cpufrequency) init();
|
|
clock_gettime(CLOCK_MONOTONIC,&t);
|
|
result = t.tv_nsec;
|
|
result *= 0.000000001;
|
|
result += (double) t.tv_sec;
|
|
result *= cpufrequency;
|
|
return result;
|
|
}
|
|
|
|
long long cpucycles_monotonic_persecond(void)
|
|
{
|
|
if (!cpufrequency) init();
|
|
return cpufrequency;
|
|
}
|