| 1 | /* $Id: time-darwin.cpp 1 1970-01-01 00:00:00Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * InnoTek Portable Runtime - Time, Darwin.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License as published by the Free Software Foundation,
|
|---|
| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * If you received this file as part of a commercial VirtualBox
|
|---|
| 18 | * distribution, then only the terms of your commercial VirtualBox
|
|---|
| 19 | * license agreement apply instead of the previous paragraph.
|
|---|
| 20 | */
|
|---|
| 21 |
|
|---|
| 22 |
|
|---|
| 23 | /*******************************************************************************
|
|---|
| 24 | * Header Files *
|
|---|
| 25 | *******************************************************************************/
|
|---|
| 26 | #define LOG_GROUP RTLOGGROUP_TIME
|
|---|
| 27 | #define RTTIME_INCL_TIMEVAL
|
|---|
| 28 | #include <mach/mach_time.h>
|
|---|
| 29 | #include <mach/kern_return.h>
|
|---|
| 30 | #include <sys/time.h>
|
|---|
| 31 | #include <time.h>
|
|---|
| 32 |
|
|---|
| 33 | #include <iprt/time.h>
|
|---|
| 34 | #include "internal/time.h"
|
|---|
| 35 |
|
|---|
| 36 |
|
|---|
| 37 | DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
|
|---|
| 38 | {
|
|---|
| 39 | static struct mach_timebase_info s_Info = { 0, 0 };
|
|---|
| 40 | static double s_rdFactor = 0.0;
|
|---|
| 41 |
|
|---|
| 42 | /* get the factors the first time (pray we're not racing anyone) */
|
|---|
| 43 | if (s_Info.denom == 0)
|
|---|
| 44 | {
|
|---|
| 45 | static bool s_fFailedToGetTimeBaseInfo = false;
|
|---|
| 46 | if (!s_fFailedToGetTimeBaseInfo)
|
|---|
| 47 | {
|
|---|
| 48 | struct mach_timebase_info Info;
|
|---|
| 49 | if (mach_timebase_info(&Info) != KERN_SUCCESS)
|
|---|
| 50 | {
|
|---|
| 51 | s_rdFactor = (double)Info.numer / (double)Info.denom;
|
|---|
| 52 | s_Info = Info;
|
|---|
| 53 | }
|
|---|
| 54 | else
|
|---|
| 55 | {
|
|---|
| 56 | s_Info.denom = s_Info.numer = 0;
|
|---|
| 57 | s_fFailedToGetTimeBaseInfo = true;
|
|---|
| 58 | }
|
|---|
| 59 | }
|
|---|
| 60 | }
|
|---|
| 61 |
|
|---|
| 62 | /* special case: absolute time is in nanoseconds */
|
|---|
| 63 | if (s_Info.denom == 1 && s_Info.numer == 1)
|
|---|
| 64 | return mach_absolute_time();
|
|---|
| 65 |
|
|---|
| 66 | /* general case: multiply by factor to get nanoseconds. */
|
|---|
| 67 | if (s_rdFactor != 0.0)
|
|---|
| 68 | return mach_absolute_time() * s_rdFactor;
|
|---|
| 69 |
|
|---|
| 70 | /* worst case: fallback to gettimeofday(). */
|
|---|
| 71 | struct timeval tv;
|
|---|
| 72 | gettimeofday(&tv, NULL);
|
|---|
| 73 | return (uint64_t)tv.tv_sec * (uint64_t)(1000 * 1000 * 1000)
|
|---|
| 74 | + (uint64_t)(tv.tv_usec * 1000);
|
|---|
| 75 | }
|
|---|
| 76 |
|
|---|
| 77 |
|
|---|
| 78 | /**
|
|---|
| 79 | * Gets the current nanosecond timestamp.
|
|---|
| 80 | *
|
|---|
| 81 | * This differs from RTTimeNanoTS in that it will use system APIs and not do any
|
|---|
| 82 | * resolution or performance optimizations.
|
|---|
| 83 | *
|
|---|
| 84 | * @returns nanosecond timestamp.
|
|---|
| 85 | */
|
|---|
| 86 | RTDECL(uint64_t) RTTimeSystemNanoTS(void)
|
|---|
| 87 | {
|
|---|
| 88 | return rtTimeGetSystemNanoTS();
|
|---|
| 89 | }
|
|---|
| 90 |
|
|---|
| 91 |
|
|---|
| 92 | /**
|
|---|
| 93 | * Gets the current millisecond timestamp.
|
|---|
| 94 | *
|
|---|
| 95 | * This differs from RTTimeNanoTS in that it will use system APIs and not do any
|
|---|
| 96 | * resolution or performance optimizations.
|
|---|
| 97 | *
|
|---|
| 98 | * @returns millisecond timestamp.
|
|---|
| 99 | */
|
|---|
| 100 | RTDECL(uint64_t) RTTimeSystemMilliTS(void)
|
|---|
| 101 | {
|
|---|
| 102 | return rtTimeGetSystemNanoTS();
|
|---|
| 103 | }
|
|---|
| 104 |
|
|---|
| 105 |
|
|---|
| 106 | /**
|
|---|
| 107 | * Gets the current system time.
|
|---|
| 108 | *
|
|---|
| 109 | * @returns pTime.
|
|---|
| 110 | * @param pTime Where to store the time.
|
|---|
| 111 | */
|
|---|
| 112 | RTDECL(PRTTIMESPEC) RTTimeNow(PRTTIMESPEC pTime)
|
|---|
| 113 | {
|
|---|
| 114 | /** @todo find nanosecond API for getting time of day. */
|
|---|
| 115 | struct timeval tv;
|
|---|
| 116 | gettimeofday(&tv, NULL);
|
|---|
| 117 | return RTTimeSpecSetTimeval(pTime, &tv);
|
|---|
| 118 | }
|
|---|
| 119 |
|
|---|
