/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2019, 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) /* set in win32_init() */ extern LARGE_INTEGER Curl_freq; extern bool Curl_isVistaOrGreater; struct curltime Curl_now(void) { struct curltime now; if(Curl_isVistaOrGreater) { /* QPC timer might have issues pre-Vista */ LARGE_INTEGER count; QueryPerformanceCounter(&count); now.tv_sec = (time_t)(count.QuadPart / Curl_freq.QuadPart); now.tv_usec = (int)((count.QuadPart % Curl_freq.QuadPart) * 1000000 / Curl_freq.QuadPart); } else { /* Disable /analyze warning that GetTickCount64 is preferred */ #if defined(_MSC_VER) #pragma warning(push) #pragma warning(disable:28159) #endif DWORD milliseconds = GetTickCount(); #if defined(_MSC_VER) #pragma warning(pop) #endif now.tv_sec = milliseconds / 1000; now.tv_usec = (milliseconds % 1000) * 1000; } 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. */ #ifdef HAVE_GETTIMEOFDAY struct timeval now; #endif struct curltime cnow; struct timespec tsnow; /* ** clock_gettime() may be defined by Apple's SDK as weak symbol thus ** code compiles but fails during run-time if clock_gettime() is ** called on unsupported OS version. */ #if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1) bool have_clock_gettime = FALSE; if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *)) have_clock_gettime = TRUE; #endif if( #if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1) have_clock_gettime && #endif (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_MACH_ABSOLUTE_TIME) #include <stdint.h> #include <mach/mach_time.h> struct curltime Curl_now(void) { /* ** Monotonic timer on Mac OS is provided by mach_absolute_time(), which ** returns time in Mach "absolute time units," which are platform-dependent. ** To convert to nanoseconds, one must use conversion factors specified by ** mach_timebase_info(). */ static mach_timebase_info_data_t timebase; struct curltime cnow; uint64_t usecs; if(0 == timebase.denom) (void) mach_timebase_info(&timebase); usecs = mach_absolute_time(); usecs *= timebase.numer; usecs /= timebase.denom; usecs /= 1000; cnow.tv_sec = usecs / 1000000; cnow.tv_usec = (int)(usecs % 1000000); 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 = (int)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 /* * 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 = (timediff_t)newer.tv_sec-older.tv_sec; if(diff >= (TIMEDIFF_T_MAX/1000)) return TIMEDIFF_T_MAX; else if(diff <= (TIMEDIFF_T_MIN/1000)) return TIMEDIFF_T_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 = (timediff_t)newer.tv_sec-older.tv_sec; if(diff >= (TIMEDIFF_T_MAX/1000000)) return TIMEDIFF_T_MAX; else if(diff <= (TIMEDIFF_T_MIN/1000000)) return TIMEDIFF_T_MIN; return diff * 1000000 + newer.tv_usec-older.tv_usec; }