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/*
htop - darwin/PlatformHelpers.c
(C) 2018 Pierre Malhaire, 2020-2021 htop dev team, 2021 Alexander Momchilov
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include "darwin/PlatformHelpers.h"
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <sys/sysctl.h>
#include "CRT.h"
#ifdef HAVE_MACH_MACH_TIME_H
#include <mach/mach_time.h>
#endif
void Platform_GetKernelVersion(KernelVersion* k) {
static KernelVersion cachedKernelVersion;
if (!cachedKernelVersion.major) {
// just in case it fails someday
cachedKernelVersion = (KernelVersion) { -1, -1, -1 };
char str[256] = {0};
size_t size = sizeof(str);
int ret = sysctlbyname("kern.osrelease", str, &size, NULL, 0);
if (ret == 0) {
sscanf(str, "%hd.%hd.%hd", &cachedKernelVersion.major, &cachedKernelVersion.minor, &cachedKernelVersion.patch);
}
}
memcpy(k, &cachedKernelVersion, sizeof(cachedKernelVersion));
}
int Platform_CompareKernelVersion(KernelVersion v) {
struct KernelVersion actualVersion;
Platform_GetKernelVersion(&actualVersion);
if (actualVersion.major != v.major) {
return actualVersion.major - v.major;
}
if (actualVersion.minor != v.minor) {
return actualVersion.minor - v.minor;
}
if (actualVersion.patch != v.patch) {
return actualVersion.patch - v.patch;
}
return 0;
}
bool Platform_KernelVersionIsBetween(KernelVersion lowerBound, KernelVersion upperBound) {
return 0 <= Platform_CompareKernelVersion(lowerBound)
&& Platform_CompareKernelVersion(upperBound) < 0;
}
double Platform_calculateNanosecondsPerMachTick() {
// Check if we can determine the timebase used on this system.
// If the API is unavailable assume we get our timebase in nanoseconds.
#ifdef HAVE_MACH_TIMEBASE_INFO
mach_timebase_info_data_t info;
mach_timebase_info(&info);
return (double)info.numer / (double)info.denom;
#else
return 1.0;
#endif
}
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