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Copy Darwin version of osdMonitonic.c to iOS

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This commit is contained in:
Andrew Johnson
2017-11-07 22:41:23 -06:00
parent 7b7abaea05
commit cb7b77b63d
1 changed files with 9 additions and 6 deletions
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15
src/osi/os/iOS/osdMonotonic.c
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@@ -4,7 +4,8 @@
* in file LICENSE that is included with this distribution.
\*************************************************************************/
#import <mach/mach_time.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
#define epicsExportSharedSymbols
#define EPICS_EXPOSE_LIBCOM_MONOTONIC_PRIVATE
@@ -13,19 +14,21 @@
#include "epicsTime.h"
#include "generalTimeSup.h"
/* see https://developer.apple.com/library/content/qa/qa1398/_index.html */
static mach_timebase_info_data_t tbinfo;
void osdMonotonicInit(void)
{
/* no-op */
(void)mach_timebase_info(&tbinfo);
}
epicsUInt64 epicsMonotonicResolution(void)
{
return 1; /* TODO, how to find ? */
return 1e-9 * tbinfo.numer / tbinfo.denom;
}
epicsUInt64 epicsMonotonicGet(void)
{
uint64_t val = mach_absolute_time(), ret;
absolutetime_to_nanoseconds(val, &ret);
return ret;
uint64_t val = mach_absolute_time();
return val * tbinfo.numer / tbinfo.denom;
}