225 lines
6.2 KiB
C
225 lines
6.2 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "timeval.h"
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#if defined(WIN32) && !defined(MSDOS)
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/* set in win32_init() */
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extern LARGE_INTEGER Curl_freq;
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extern bool Curl_isVistaOrGreater;
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/* In case of bug fix this function has a counterpart in tool_util.c */
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struct curltime Curl_now(void)
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{
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struct curltime now;
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if(Curl_isVistaOrGreater) { /* QPC timer might have issues pre-Vista */
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LARGE_INTEGER count;
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QueryPerformanceCounter(&count);
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now.tv_sec = (time_t)(count.QuadPart / Curl_freq.QuadPart);
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now.tv_usec = (int)((count.QuadPart % Curl_freq.QuadPart) * 1000000 /
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Curl_freq.QuadPart);
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}
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else {
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/* Disable /analyze warning that GetTickCount64 is preferred */
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#if defined(_MSC_VER)
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#pragma warning(push)
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#pragma warning(disable:28159)
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#endif
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DWORD milliseconds = GetTickCount();
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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now.tv_sec = milliseconds / 1000;
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now.tv_usec = (milliseconds % 1000) * 1000;
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}
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return now;
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}
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#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) || \
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defined(HAVE_CLOCK_GETTIME_MONOTONIC_RAW)
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struct curltime Curl_now(void)
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{
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/*
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** clock_gettime() is granted to be increased monotonically when the
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** monotonic clock is queried. Time starting point is unspecified, it
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** could be the system start-up time, the Epoch, or something else,
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** in any case the time starting point does not change once that the
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** system has started up.
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*/
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#ifdef HAVE_GETTIMEOFDAY
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struct timeval now;
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#endif
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struct curltime cnow;
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struct timespec tsnow;
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/*
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** clock_gettime() may be defined by Apple's SDK as weak symbol thus
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** code compiles but fails during run-time if clock_gettime() is
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** called on unsupported OS version.
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*/
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#if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \
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(HAVE_BUILTIN_AVAILABLE == 1)
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bool have_clock_gettime = FALSE;
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if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *))
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have_clock_gettime = TRUE;
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#endif
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#ifdef HAVE_CLOCK_GETTIME_MONOTONIC_RAW
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if(
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#if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \
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(HAVE_BUILTIN_AVAILABLE == 1)
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have_clock_gettime &&
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#endif
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(0 == clock_gettime(CLOCK_MONOTONIC_RAW, &tsnow))) {
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cnow.tv_sec = tsnow.tv_sec;
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cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000);
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}
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else
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#endif
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if(
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#if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \
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(HAVE_BUILTIN_AVAILABLE == 1)
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have_clock_gettime &&
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#endif
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(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow))) {
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cnow.tv_sec = tsnow.tv_sec;
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cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000);
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}
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/*
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** Even when the configure process has truly detected monotonic clock
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** availability, it might happen that it is not actually available at
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** run-time. When this occurs simply fallback to other time source.
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*/
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#ifdef HAVE_GETTIMEOFDAY
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else {
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(void)gettimeofday(&now, NULL);
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cnow.tv_sec = now.tv_sec;
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cnow.tv_usec = (unsigned int)now.tv_usec;
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}
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#else
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else {
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cnow.tv_sec = time(NULL);
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cnow.tv_usec = 0;
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}
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#endif
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return cnow;
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}
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#elif defined(HAVE_MACH_ABSOLUTE_TIME)
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#include <stdint.h>
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#include <mach/mach_time.h>
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struct curltime Curl_now(void)
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{
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/*
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** Monotonic timer on Mac OS is provided by mach_absolute_time(), which
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** returns time in Mach "absolute time units," which are platform-dependent.
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** To convert to nanoseconds, one must use conversion factors specified by
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** mach_timebase_info().
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*/
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static mach_timebase_info_data_t timebase;
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struct curltime cnow;
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uint64_t usecs;
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if(0 == timebase.denom)
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(void) mach_timebase_info(&timebase);
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usecs = mach_absolute_time();
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usecs *= timebase.numer;
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usecs /= timebase.denom;
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usecs /= 1000;
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cnow.tv_sec = usecs / 1000000;
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cnow.tv_usec = (int)(usecs % 1000000);
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return cnow;
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}
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#elif defined(HAVE_GETTIMEOFDAY)
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struct curltime Curl_now(void)
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{
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/*
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** gettimeofday() is not granted to be increased monotonically, due to
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** clock drifting and external source time synchronization it can jump
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** forward or backward in time.
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*/
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struct timeval now;
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struct curltime ret;
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(void)gettimeofday(&now, NULL);
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ret.tv_sec = now.tv_sec;
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ret.tv_usec = (int)now.tv_usec;
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return ret;
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}
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#else
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struct curltime Curl_now(void)
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{
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/*
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** time() returns the value of time in seconds since the Epoch.
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*/
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struct curltime now;
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now.tv_sec = time(NULL);
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now.tv_usec = 0;
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return now;
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}
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#endif
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/*
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* Returns: time difference in number of milliseconds. For too large diffs it
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* returns max value.
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*
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* @unittest: 1323
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*/
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timediff_t Curl_timediff(struct curltime newer, struct curltime older)
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{
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timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
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if(diff >= (TIMEDIFF_T_MAX/1000))
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return TIMEDIFF_T_MAX;
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else if(diff <= (TIMEDIFF_T_MIN/1000))
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return TIMEDIFF_T_MIN;
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return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000;
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}
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/*
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* Returns: time difference in number of microseconds. For too large diffs it
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* returns max value.
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*/
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timediff_t Curl_timediff_us(struct curltime newer, struct curltime older)
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{
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timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
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if(diff >= (TIMEDIFF_T_MAX/1000000))
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return TIMEDIFF_T_MAX;
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else if(diff <= (TIMEDIFF_T_MIN/1000000))
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return TIMEDIFF_T_MIN;
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return diff * 1000000 + newer.tv_usec-older.tv_usec;
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}
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