| 1 | /* $Id: time-r0drv-darwin.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Time, Ring-0 Driver, Darwin.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2022 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP RTLOGGROUP_TIME
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| 42 | #include "the-darwin-kernel.h"
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| 43 | #include "internal/iprt.h"
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| 44 | #include <iprt/time.h>
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| 45 |
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| 46 | #include <iprt/asm.h>
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| 47 |
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| 48 |
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| 49 | DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
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| 50 | {
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| 51 | static int8_t s_fSimple = -1;
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| 52 |
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| 53 | /* first call: check if life is simple or not. */
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| 54 | if (s_fSimple < 0)
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| 55 | {
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| 56 | struct mach_timebase_info Info;
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| 57 | clock_timebase_info(&Info);
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| 58 | ASMAtomicXchgS8((int8_t * volatile)&s_fSimple, Info.denom == 1 && Info.numer == 1);
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| 59 | }
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| 60 |
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| 61 | /* special case: absolute time is in nanoseconds */
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| 62 | if (s_fSimple)
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| 63 | return mach_absolute_time();
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| 64 |
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| 65 | /* general case: let mach do the mult/div for us. */
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| 66 | uint64_t u64;
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| 67 | absolutetime_to_nanoseconds(mach_absolute_time(), &u64);
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| 68 | return u64;
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| 69 | }
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| 70 |
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| 71 |
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| 72 | RTDECL(uint64_t) RTTimeNanoTS(void)
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| 73 | {
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| 74 | return rtTimeGetSystemNanoTS();
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| 75 | }
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| 76 |
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| 77 |
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| 78 | RTDECL(uint64_t) RTTimeMilliTS(void)
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| 79 | {
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| 80 | return rtTimeGetSystemNanoTS() / RT_NS_1MS;
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| 81 | }
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| 82 |
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| 83 |
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| 84 | RTDECL(uint64_t) RTTimeSystemNanoTS(void)
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| 85 | {
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| 86 | return rtTimeGetSystemNanoTS();
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| 87 | }
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| 88 |
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| 89 |
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| 90 | RTDECL(uint64_t) RTTimeSystemMilliTS(void)
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| 91 | {
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| 92 | return rtTimeGetSystemNanoTS() / RT_NS_1MS;
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| 93 | }
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| 94 |
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| 95 |
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| 96 | RTDECL(PRTTIMESPEC) RTTimeNow(PRTTIMESPEC pTime)
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| 97 | {
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| 98 | #if MAC_OS_X_VERSION_MIN_REQUIRED < 1060
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| 99 | uint32_t uSecs;
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| 100 | uint32_t uNanosecs;
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| 101 | #else
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| 102 | clock_sec_t uSecs;
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| 103 | clock_nsec_t uNanosecs;
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| 104 | #endif
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| 105 | clock_get_calendar_nanotime(&uSecs, &uNanosecs);
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| 106 | return RTTimeSpecSetNano(pTime, (int64_t)uSecs * RT_NS_1SEC + uNanosecs);
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| 107 | }
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| 108 |
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