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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "timeval.h"
#if defined(WIN32) && !defined(MSDOS)
struct curltime Curl_now(void)
{
/*
** GetTickCount() is available on _all_ Windows versions from W95 up
** to nowadays. Returns milliseconds elapsed since last system boot,
** increases monotonically and wraps once 49.7 days have elapsed.
*/
struct curltime now;
#if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
(_WIN32_WINNT < _WIN32_WINNT_VISTA)
DWORD milliseconds = GetTickCount();
now.tv_sec = milliseconds / 1000;
now.tv_usec = (milliseconds % 1000) * 1000;
#else
ULONGLONG milliseconds = GetTickCount64();
now.tv_sec = (time_t) (milliseconds / 1000);
now.tv_usec = (unsigned int) (milliseconds % 1000) * 1000;
#endif
return now;
}
#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
struct curltime Curl_now(void)
{
/*
** clock_gettime() is granted 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.
*/
struct timeval now;
struct curltime cnow;
struct timespec tsnow;
if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
cnow.tv_sec = tsnow.tv_sec;
cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000);
}
/*
** Even when the configure process has truly detected monotonic clock
** availability, it might happen that it is not actually available at
** run-time. When this occurs simply fallback to other time source.
*/
#ifdef HAVE_GETTIMEOFDAY
else {
(void)gettimeofday(&now, NULL);
cnow.tv_sec = now.tv_sec;
cnow.tv_usec = (unsigned int)now.tv_usec;
}
#else
else {
cnow.tv_sec = time(NULL);
cnow.tv_usec = 0;
}
#endif
return cnow;
}
#elif defined(HAVE_GETTIMEOFDAY)
struct curltime Curl_now(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.
*/
struct timeval now;
struct curltime ret;
(void)gettimeofday(&now, NULL);
ret.tv_sec = now.tv_sec;
ret.tv_usec = now.tv_usec;
return ret;
}
#else
struct curltime Curl_now(void)
{
/*
** time() returns the value of time in seconds since the Epoch.
*/
struct curltime now;
now.tv_sec = time(NULL);
now.tv_usec = 0;
return now;
}
#endif
#if SIZEOF_TIME_T < 8
#define TIME_MAX INT_MAX
#define TIME_MIN INT_MIN
#else
#define TIME_MAX 9223372036854775807LL
#define TIME_MIN -9223372036854775807LL
#endif
/*
* Returns: time difference in number of milliseconds. For too large diffs it
* returns max value.
*
* @unittest: 1323
*/
timediff_t Curl_timediff(struct curltime newer, struct curltime older)
{
timediff_t diff = newer.tv_sec-older.tv_sec;
if(diff >= (TIME_MAX/1000))
return TIME_MAX;
else if(diff <= (TIME_MIN/1000))
return TIME_MIN;
return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000;
}
/*
* Returns: time difference in number of microseconds. For too large diffs it
* returns max value.
*/
timediff_t Curl_timediff_us(struct curltime newer, struct curltime older)
{
timediff_t diff = newer.tv_sec-older.tv_sec;
if(diff >= (TIME_MAX/1000000))
return TIME_MAX;
else if(diff <= (TIME_MIN/1000000))
return TIME_MIN;
return diff * 1000000 + newer.tv_usec-older.tv_usec;
}
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