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Extract Darwin "PlatformHelpers"

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This commit is contained in:
Alexander Momchilov
2021-08-22 12:30:08 -04:00
parent 754c0d6bb9
commit dadcb87ad0
6 changed files with 107 additions and 51 deletions
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12
darwin/Platform.c
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@ -35,6 +35,7 @@ in the source distribution for its full text.
#include "TasksMeter.h"
#include "UptimeMeter.h"
#include "darwin/DarwinProcessList.h"
#include "darwin/PlatformHelpers.h"
#include "zfs/ZfsArcMeter.h"
#include "zfs/ZfsCompressedArcMeter.h"
@ -42,6 +43,7 @@ in the source distribution for its full text.
#include <mach/clock.h>
#include <mach/mach.h>
#endif
#ifdef HAVE_MACH_MACH_TIME_H
#include <mach/mach_time.h>
#endif
@ -125,15 +127,7 @@ static double Platform_nanosecondsPerMachTick = 1.0;
static double Platform_nanosecondsPerSchedulerTick = -1;
void Platform_init(void) {
// 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);
Platform_nanosecondsPerMachTick = (double)info.numer / (double)info.denom;
#else
Platform_nanosecondsPerMachTick = 1.0;
#endif
Platform_nanosecondsPerMachTick = Platform_calculateNanosecondsPerMachTick();
// Determine the number of scheduler clock ticks per second
errno = 0;