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/* MIT License
*
* Copyright (c) 2008 Daniel Stenberg
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MIT
*/
#include "ares_setup.h"
#include "ares.h"
#include "ares_private.h"
#if defined(WIN32) && !defined(MSDOS)
ares_timeval_t ares__tvnow(void)
{
/* GetTickCount64() is available on Windows Vista and higher */
ares_timeval_t now;
ULONGLONG milliseconds = GetTickCount64();
now.sec = (ares_int64_t)milliseconds / 1000;
now.usec = (unsigned int)(milliseconds % 1000) * 1000;
return now;
}
#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
ares_timeval_t ares__tvnow(void)
{
/* clock_gettime() is guaranteed to be increased monotonically when the
* monotonic clock is queried. Time starting point is unspecified, it
* could be the system start-up time, the Epoch, or something else,
* in any case the time starting point does not change once that the
* system has started up. */
ares_timeval_t now;
struct timespec tsnow;
if (clock_gettime(CLOCK_MONOTONIC, &tsnow) == 0) {
now.sec = (ares_int64_t)tsnow.tv_sec;
now.usec = (unsigned int)(tsnow.tv_nsec / 1000);
} else {
struct timeval tv;
(void)gettimeofday(&tv, NULL);
now.sec = (ares_int64_t)tv.tv_sec;
now.usec = (unsigned int)tv.tv_usec;
}
return now;
}
#elif defined(HAVE_GETTIMEOFDAY)
ares_timeval_t ares__tvnow(void)
{
/* gettimeofday() is not granted to be increased monotonically, due to
* clock drifting and external source time synchronization it can jump
* forward or backward in time. */
ares_timeval_t now;
struct timeval tv;
(void)gettimeofday(&tv, NULL);
now.sec = (ares_int64_t)tv.tv_sec;
now.usec = (unsigned int)tv.tv_usec;
return now;
}
#else
# error missing sub-second time retrieval function
#endif
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