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/* $Id: time-r0drv-darwin.cpp $ */
/** @file
* IPRT - Time, Ring-0 Driver, Darwin.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_TIME
#include "the-darwin-kernel.h"
#include "internal/iprt.h"
#include <iprt/time.h>
#include <iprt/asm.h>
DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
{
static int8_t s_fSimple = -1;
/* first call: check if life is simple or not. */
if (s_fSimple < 0)
{
struct mach_timebase_info Info;
clock_timebase_info(&Info);
ASMAtomicXchgS8((int8_t * volatile)&s_fSimple, Info.denom == 1 && Info.numer == 1);
}
/* special case: absolute time is in nanoseconds */
if (s_fSimple)
return mach_absolute_time();
/* general case: let mach do the mult/div for us. */
uint64_t u64;
absolutetime_to_nanoseconds(mach_absolute_time(), &u64);
return u64;
}
RTDECL(uint64_t) RTTimeNanoTS(void)
{
return rtTimeGetSystemNanoTS();
}
RTDECL(uint64_t) RTTimeMilliTS(void)
{
return rtTimeGetSystemNanoTS() / RT_NS_1MS;
}
RTDECL(uint64_t) RTTimeSystemNanoTS(void)
{
return rtTimeGetSystemNanoTS();
}
RTDECL(uint64_t) RTTimeSystemMilliTS(void)
{
return rtTimeGetSystemNanoTS() / RT_NS_1MS;
}
RTDECL(PRTTIMESPEC) RTTimeNow(PRTTIMESPEC pTime)
{
#if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
uint32_t uSecs;
uint32_t uNanosecs;
#else
clock_sec_t uSecs;
clock_nsec_t uNanosecs;
#endif
clock_get_calendar_nanotime(&uSecs, &uNanosecs);
return RTTimeSpecSetNano(pTime, (uint64_t)uSecs * RT_NS_1SEC + uNanosecs);
}
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