blob: bc18baddbc20eb6859eb1cac01b992739425e722 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/* $Id: time-darwin.cpp $ */
/** @file
* IPRT - Time, Darwin.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_TIME
#define RTTIME_INCL_TIMEVAL
#include <mach/mach_time.h>
#include <mach/kern_return.h>
#include <sys/time.h>
#include <time.h>
#include <iprt/time.h>
#include <iprt/assert.h>
#include "internal/time.h"
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static struct mach_timebase_info g_Info = { 0, 0 };
static double g_rdFactor = 0.0;
static bool g_fFailedToGetTimeBaseInfo = false;
/**
* Perform lazy init (pray we're not racing anyone in a bad way).
*/
static void rtTimeDarwinLazyInit(void)
{
struct mach_timebase_info Info;
if (mach_timebase_info(&Info) == KERN_SUCCESS)
{
g_rdFactor = (double)Info.numer / (double)Info.denom;
g_Info = Info;
}
else
{
g_fFailedToGetTimeBaseInfo = true;
Assert(g_Info.denom == 0 && g_Info.numer == 0 && g_rdFactor == 0.0);
}
}
/**
* Internal worker.
* @returns Nanosecond timestamp.
*/
DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
{
/* Lazy init. */
if (RT_UNLIKELY(g_Info.denom == 0 && !g_fFailedToGetTimeBaseInfo))
rtTimeDarwinLazyInit();
/* special case: absolute time is in nanoseconds */
if (g_Info.denom == 1 && g_Info.numer == 1)
return mach_absolute_time();
/* general case: multiply by factor to get nanoseconds. */
if (g_rdFactor != 0.0)
return mach_absolute_time() * g_rdFactor;
/* worst case: fallback to gettimeofday(). */
struct timeval tv;
gettimeofday(&tv, NULL);
return (uint64_t)tv.tv_sec * RT_NS_1SEC_64
+ (uint64_t)(tv.tv_usec * RT_NS_1US);
}
RTDECL(uint64_t) RTTimeSystemNanoTS(void)
{
return rtTimeGetSystemNanoTS();
}
RTDECL(uint64_t) RTTimeSystemMilliTS(void)
{
return rtTimeGetSystemNanoTS() / RT_NS_1MS;
}
RTDECL(PRTTIMESPEC) RTTimeNow(PRTTIMESPEC pTime)
{
/** @todo find nanosecond API for getting time of day. */
struct timeval tv;
gettimeofday(&tv, NULL);
return RTTimeSpecSetTimeval(pTime, &tv);
}
|
