| 1 | /* $Id: time-posix.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Time, POSIX.
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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 | #define RTTIME_INCL_TIMEVAL
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| 43 | #include <sys/time.h>
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| 44 | #include <time.h>
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| 45 |
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| 46 | #include <iprt/time.h>
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| 47 | #include "internal/time.h"
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| 48 |
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| 49 |
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| 50 | DECLINLINE(uint64_t) rtTimeGetSystemNanoTS(void)
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| 51 | {
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| 52 | #if defined(CLOCK_MONOTONIC) && !defined(RT_OS_L4) && !defined(RT_OS_OS2)
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| 53 | /* check monotonic clock first. */
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| 54 | static bool s_fMonoClock = true;
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| 55 | if (s_fMonoClock)
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| 56 | {
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| 57 | struct timespec ts;
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| 58 | if (!clock_gettime(CLOCK_MONOTONIC, &ts))
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| 59 | return (uint64_t)ts.tv_sec * RT_NS_1SEC_64
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| 60 | + ts.tv_nsec;
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| 61 | s_fMonoClock = false;
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| 62 | }
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| 63 | #endif
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| 64 |
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| 65 | /* fallback to gettimeofday(). */
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| 66 | struct timeval tv;
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| 67 | gettimeofday(&tv, NULL);
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| 68 | return (uint64_t)tv.tv_sec * RT_NS_1SEC_64
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| 69 | + (uint64_t)(tv.tv_usec * RT_NS_1US);
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| 70 | }
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| 71 |
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| 72 |
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| 73 | /**
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| 74 | * Gets the current nanosecond timestamp.
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| 75 | *
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| 76 | * This differs from RTTimeNanoTS in that it will use system APIs and not do any
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| 77 | * resolution or performance optimizations.
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| 78 | *
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| 79 | * @returns nanosecond timestamp.
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| 80 | */
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| 81 | RTDECL(uint64_t) RTTimeSystemNanoTS(void)
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| 82 | {
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| 83 | return rtTimeGetSystemNanoTS();
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| 84 | }
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| 85 |
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| 86 |
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| 87 | /**
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| 88 | * Gets the current millisecond timestamp.
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| 89 | *
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| 90 | * This differs from RTTimeNanoTS in that it will use system APIs and not do any
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| 91 | * resolution or performance optimizations.
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| 92 | *
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| 93 | * @returns millisecond timestamp.
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| 94 | */
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| 95 | RTDECL(uint64_t) RTTimeSystemMilliTS(void)
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| 96 | {
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| 97 | return rtTimeGetSystemNanoTS() / RT_NS_1MS;
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| 98 | }
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| 99 |
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