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688fa86de4
When the libc headers used to build mosquitto define CLOCK_BOOTTIME but the kernel where mosquitto runs does not implement CLOCK_BOOTTIME, all timestamps are wrong (uninitialized data), because there is no check for the success of the clock_gettime() calls. This adds probing for the availability of CLOCK_BOOTTIME from mosquitto_lib_init(), falling back to CLOCK_MONOTONIC, and then modifies mosquitto_time() to use the selected clock. Probing at init time avoids having to do two clock_gettime() calls for every timestamp if CLOCK_BOOTTIME is not available. It also fixes a similar problem in mosquitto_lib_init(). Signed-off-by: Diego Santa Cruz <diego.santacruz@spinetix.com>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/*
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Copyright (c) 2013-2020 Roger Light <roger@atchoo.org>
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All rights reserved. This program and the accompanying materials
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are made available under the terms of the Eclipse Public License 2.0
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and Eclipse Distribution License v1.0 which accompany this distribution.
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The Eclipse Public License is available at
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https://www.eclipse.org/legal/epl-2.0/
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and the Eclipse Distribution License is available at
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http://www.eclipse.org/org/documents/edl-v10.php.
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SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
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Contributors:
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Roger Light - initial implementation and documentation.
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*/
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#include "config.h"
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#ifdef __APPLE__
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#include <mach/mach.h>
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#include <mach/mach_time.h>
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#endif
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#ifdef WIN32
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#if !(defined(_MSC_VER) && _MSC_VER <= 1500)
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# define _WIN32_WINNT _WIN32_WINNT_VISTA
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#endif
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# include <windows.h>
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#else
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# include <unistd.h>
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#endif
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#include <time.h>
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#include "mosquitto.h"
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#include "time_mosq.h"
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#if _POSIX_TIMERS>0 && defined(_POSIX_MONOTONIC_CLOCK)
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static clockid_t time_clock;
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#endif
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void mosquitto_time_init(void)
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{
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#if _POSIX_TIMERS>0 && defined(_POSIX_MONOTONIC_CLOCK)
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struct timespec tp;
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#ifdef CLOCK_BOOTTIME
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if (clock_gettime(CLOCK_BOOTTIME, &tp) == 0) {
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time_clock = CLOCK_BOOTTIME;
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} else {
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time_clock = CLOCK_MONOTONIC;
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}
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#else
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time_clock = CLOCK_MONOTONIC;
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#endif
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#endif
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}
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time_t mosquitto_time(void)
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{
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#ifdef WIN32
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return GetTickCount64()/1000;
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#elif _POSIX_TIMERS>0 && defined(_POSIX_MONOTONIC_CLOCK)
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struct timespec tp;
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if (clock_gettime(time_clock, &tp) == 0)
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return tp.tv_sec;
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return (time_t) -1;
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#elif defined(__APPLE__)
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static mach_timebase_info_data_t tb;
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uint64_t ticks;
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uint64_t sec;
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ticks = mach_absolute_time();
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if(tb.denom == 0){
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mach_timebase_info(&tb);
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}
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sec = ticks*tb.numer/tb.denom/1000000000;
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return (time_t)sec;
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#else
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return time(NULL);
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#endif
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}
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