/* times.cc Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Red Hat, Inc. This file is part of Cygwin. This software is a copyrighted work licensed under the terms of the Cygwin license. Please consult the file "CYGWIN_LICENSE" for details. */ #include "winsup.h" #include #include #include #include #include #include #include #include "cygerrno.h" #include "security.h" #include "path.h" #include "fhandler.h" #include "dtable.h" #include "cygheap.h" #include "pinfo.h" #include "hires.h" #include "cygtls.h" #include "sigproc.h" #include "sync.h" #define FACTOR (0x19db1ded53e8000LL) #define NSPERSEC 10000000LL static inline LONGLONG systime () { LARGE_INTEGER x; FILETIME ft; GetSystemTimeAsFileTime (&ft); x.HighPart = ft.dwHighDateTime; x.LowPart = ft.dwLowDateTime; x.QuadPart -= FACTOR; /* Add conversion factor for UNIX vs. Windows base time */ x.QuadPart /= 10; /* Convert to microseconds */ return x.QuadPart; } /* Cygwin internal */ static unsigned long long __stdcall __to_clock_t (FILETIME *src, int flag) { unsigned long long total = ((unsigned long long) src->dwHighDateTime << 32) + ((unsigned)src->dwLowDateTime); syscall_printf ("dwHighDateTime %u, dwLowDateTime %u", src->dwHighDateTime, src->dwLowDateTime); /* Convert into clock ticks - the total is in 10ths of a usec. */ if (flag) total -= FACTOR; total /= (unsigned long long) (NSPERSEC / CLOCKS_PER_SEC); syscall_printf ("total %08x %08x", (unsigned) (total>>32), (unsigned) (total)); return total; } /* times: POSIX 4.5.2.1 */ extern "C" clock_t times (struct tms *buf) { FILETIME creation_time, exit_time, kernel_time, user_time; myfault efault; if (efault.faulted (EFAULT)) return ((clock_t) -1); LONGLONG ticks = gtod.uptime (); /* Ticks is in milliseconds, convert to our ticks. Use long long to prevent overflow. */ clock_t tc = (clock_t) (ticks * CLOCKS_PER_SEC / 1000); if (wincap.has_get_process_times ()) { GetProcessTimes (hMainProc, &creation_time, &exit_time, &kernel_time, &user_time); syscall_printf ("ticks %d, CLOCKS_PER_SEC %d", ticks, CLOCKS_PER_SEC); syscall_printf ("user_time %d, kernel_time %d, creation_time %d, exit_time %d", user_time, kernel_time, creation_time, exit_time); buf->tms_stime = __to_clock_t (&kernel_time, 0); buf->tms_utime = __to_clock_t (&user_time, 0); timeval_to_filetime (&myself->rusage_children.ru_stime, &kernel_time); buf->tms_cstime = __to_clock_t (&kernel_time, 1); timeval_to_filetime (&myself->rusage_children.ru_utime, &user_time); buf->tms_cutime = __to_clock_t (&user_time, 1); } else /* GetProcessTimes() does not work for non-NT versions of Windows. The return values are undefined, so instead just copy the ticks value into utime so that clock() will work properly on these systems */ { buf->tms_utime = tc; buf->tms_stime = 0; buf->tms_cstime = 0; buf->tms_cutime = 0; } return tc; } EXPORT_ALIAS (times, _times) /* settimeofday: BSD */ extern "C" int settimeofday (const struct timeval *tv, const struct timezone *tz) { SYSTEMTIME st; struct tm *ptm; int res; tz = tz; /* silence warning about unused variable */ ptm = gmtime (&tv->tv_sec); st.wYear = ptm->tm_year + 1900; st.wMonth = ptm->tm_mon + 1; st.wDayOfWeek = ptm->tm_wday; st.wDay = ptm->tm_mday; st.wHour = ptm->tm_hour; st.wMinute = ptm->tm_min; st.wSecond = ptm->tm_sec; st.wMilliseconds = tv->tv_usec / 1000; res = !SetSystemTime (&st); syscall_printf ("%d = settimeofday (%x, %x)", res, tv, tz); return res; } /* timezone: standards? */ extern "C" char * timezone (void) { char *b = _my_tls.locals.timezone_buf; tzset (); __small_sprintf (b,"GMT%+d:%02d", (int) (-_timezone / 3600), (int) (abs (_timezone / 60) % 60)); return b; } /* Cygwin internal */ void __stdcall totimeval (struct timeval *dst, FILETIME *src, int sub, int flag) { long long x = __to_clock_t (src, flag); x *= (int) (1e6) / CLOCKS_PER_SEC; /* Turn x into usecs */ x -= (long long) sub * (int) (1e6); dst->tv_usec = x % (long long) (1e6); /* And split */ dst->tv_sec = x / (long long) (1e6); } hires_ms NO_COPY gtod; /* FIXME: Make thread safe */ extern "C" int gettimeofday (struct timeval *tv, struct timezone *tz) { static bool tzflag; LONGLONG now = gtod.usecs (); if (now == (LONGLONG) -1) return -1; tv->tv_sec = now / 1000000; tv->tv_usec = now % 1000000; if (tz != NULL) { if (!tzflag) { tzset (); tzflag = true; } tz->tz_minuteswest = _timezone / 60; tz->tz_dsttime = _daylight; } return 0; } EXPORT_ALIAS (gettimeofday, _gettimeofday) /* Cygwin internal */ void time_t_to_filetime (time_t time_in, FILETIME *out) { long long x = time_in * NSPERSEC + FACTOR; out->dwHighDateTime = x >> 32; out->dwLowDateTime = x; } /* Cygwin internal */ void __stdcall timeval_to_filetime (const struct timeval *time_in, FILETIME *out) { long long x = time_in->tv_sec * NSPERSEC + time_in->tv_usec * (NSPERSEC/1000000) + FACTOR; out->dwHighDateTime = x >> 32; out->dwLowDateTime = x; } /* Cygwin internal */ static timeval __stdcall time_t_to_timeval (time_t in) { timeval res; res.tv_sec = in; res.tv_usec = 0; return res; } /* Cygwin internal */ /* Convert a Win32 time to "UNIX" format. */ long __stdcall to_time_t (FILETIME *ptr) { /* A file time is the number of 100ns since jan 1 1601 stuffed into two long words. A time_t is the number of seconds since jan 1 1970. */ long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned)ptr->dwLowDateTime); /* pass "no time" as epoch */ if (x == 0) return 0; x -= FACTOR; /* number of 100ns between 1601 and 1970 */ x /= (long long) NSPERSEC; /* number of 100ns in a second */ return x; } /* Cygwin internal */ /* Convert a Win32 time to "UNIX" timestruc_t format. */ void __stdcall to_timestruc_t (FILETIME *ptr, timestruc_t *out) { /* A file time is the number of 100ns since jan 1 1601 stuffed into two long words. A timestruc_t is the number of seconds and microseconds since jan 1 1970 stuffed into a time_t and a long. */ long rem; long long x = ((long long) ptr->dwHighDateTime << 32) + ((unsigned)ptr->dwLowDateTime); /* pass "no time" as epoch */ if (x == 0) { out->tv_sec = 0; out->tv_nsec = 0; return; } x -= FACTOR; /* number of 100ns between 1601 and 1970 */ rem = x % ((long long)NSPERSEC); x /= (long long) NSPERSEC; /* number of 100ns in a second */ out->tv_nsec = rem * 100; /* as tv_nsec is in nanoseconds */ out->tv_sec = x; } /* Cygwin internal */ /* Get the current time as a "UNIX" timestruc_t format. */ void __stdcall time_as_timestruc_t (timestruc_t * out) { FILETIME filetime; GetSystemTimeAsFileTime (&filetime); to_timestruc_t (&filetime, out); } /* time: POSIX 4.5.1.1, C 4.12.2.4 */ /* Return number of seconds since 00:00 UTC on jan 1, 1970 */ extern "C" time_t time (time_t * ptr) { time_t res; FILETIME filetime; GetSystemTimeAsFileTime (&filetime); res = to_time_t (&filetime); if (ptr) *ptr = res; syscall_printf ("%d = time (%x)", res, ptr); return res; } /* * localtime_r.c * Original Author: Adapted from tzcode maintained by Arthur David Olson. * * Converts the calendar time pointed to by tim_p into a broken-down time * expressed as local time. Returns a pointer to a structure containing the * broken-down time. */ #define SECSPERMIN 60 #define MINSPERHOUR 60 #define HOURSPERDAY 24 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) #define SECSPERDAY (SECSPERHOUR * HOURSPERDAY) #define DAYSPERWEEK 7 #define MONSPERYEAR 12 #define YEAR_BASE 1900 #define EPOCH_YEAR 1970 #define EPOCH_WDAY 4 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) #if 0 /* POSIX_LOCALTIME */ static _CONST int mon_lengths[2][MONSPERYEAR] = { {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} }; static _CONST int year_lengths[2] = { 365, 366 }; /* * Convert a time_t into a struct tm *. * Does NO timezone conversion. */ /* Cygwin internal */ static struct tm * __stdcall corelocaltime (const time_t * tim_p) { long days, rem; int y; int yleap; _CONST int *ip; struct tm &localtime_buf=_my_tls.locals.localtime_buf; time_t tim = *tim_p; struct tm *res = &localtime_buf; days = ((long) tim) / SECSPERDAY; rem = ((long) tim) % SECSPERDAY; while (rem < 0) { rem += SECSPERDAY; --days; } while (rem >= SECSPERDAY) { rem -= SECSPERDAY; ++days; } /* compute hour, min, and sec */ res->tm_hour = (int) (rem / SECSPERHOUR); rem %= SECSPERHOUR; res->tm_min = (int) (rem / SECSPERMIN); res->tm_sec = (int) (rem % SECSPERMIN); /* compute day of week */ if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0) res->tm_wday += DAYSPERWEEK; /* compute year & day of year */ y = EPOCH_YEAR; if (days >= 0) { for (;;) { yleap = isleap (y); if (days < year_lengths[yleap]) break; y++; days -= year_lengths[yleap]; } } else { do { --y; yleap = isleap (y); days += year_lengths[yleap]; } while (days < 0); } res->tm_year = y - YEAR_BASE; res->tm_yday = days; ip = mon_lengths[yleap]; for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon) days -= ip[res->tm_mon]; res->tm_mday = days + 1; /* set daylight saving time flag */ res->tm_isdst = -1; syscall_printf ("%d = corelocaltime (%x)", res, tim_p); return (res); } /* localtime: POSIX 8.1.1, C 4.12.3.4 */ /* * localtime takes a time_t (which is in UTC) * and formats it into a struct tm as a local time. */ extern "C" struct tm * localtime (const time_t *tim_p) { time_t tim = *tim_p; struct tm *rtm; tzset (); tim -= _timezone; rtm = corelocaltime (&tim); rtm->tm_isdst = _daylight; syscall_printf ("%x = localtime (%x)", rtm, tim_p); return rtm; } /* gmtime: C 4.12.3.3 */ /* * gmtime takes a time_t (which is already in UTC) * and just puts it into a struct tm. */ extern "C" struct tm * gmtime (const time_t *tim_p) { time_t tim = *tim_p; struct tm *rtm = corelocaltime (&tim); /* UTC has no daylight savings time */ rtm->tm_isdst = 0; syscall_printf ("%x = gmtime (%x)", rtm, tim_p); return rtm; } #endif /* POSIX_LOCALTIME */ static int utimes_worker (const char *path, const struct timeval *tvp, int nofollow) { int res = -1; path_conv win32 (path, PC_POSIX | (nofollow ? PC_SYM_NOFOLLOW : PC_SYM_FOLLOW)); if (win32.error) set_errno (win32.error); else { fhandler_base *fh = NULL; bool fromfd = false; cygheap_fdenum cfd (true); while (cfd.next () >= 0) if (cfd->get_access () & (FILE_WRITE_ATTRIBUTES | GENERIC_WRITE) && strcmp (cfd->get_win32_name (), win32) == 0) { fh = cfd; fromfd = true; break; } if (!fh) { if (!(fh = build_fh_pc (win32))) goto error; if (fh->error ()) { debug_printf ("got %d error from build_fh_name", fh->error ()); set_errno (fh->error ()); } } res = fh->utimes (tvp); if (!fromfd) delete fh; } error: syscall_printf ("%d = utimes (%s, %p)", res, path, tvp); return res; } /* utimes: POSIX/SUSv3 */ extern "C" int utimes (const char *path, const struct timeval *tvp) { return utimes_worker (path, tvp, 0); } /* BSD */ extern "C" int lutimes (const char *path, const struct timeval *tvp) { return utimes_worker (path, tvp, 1); } /* BSD */ extern "C" int futimes (int fd, const struct timeval *tvp) { int res; cygheap_fdget cfd (fd); if (cfd < 0) res = -1; else if (cfd->get_access () & (FILE_WRITE_ATTRIBUTES | GENERIC_WRITE)) res = cfd->utimes (tvp); else res = utimes_worker (cfd->get_win32_name (), tvp, 1); syscall_printf ("%d = futimes (%d, %p)", res, fd, tvp); return res; } /* utime: POSIX 5.6.6.1 */ extern "C" int utime (const char *path, const struct utimbuf *buf) { struct timeval tmp[2]; if (buf == 0) return utimes (path, 0); debug_printf ("incoming utime act %x", buf->actime); tmp[0] = time_t_to_timeval (buf->actime); tmp[1] = time_t_to_timeval (buf->modtime); return utimes (path, tmp); } /* ftime: standards? */ extern "C" int ftime (struct timeb *tp) { struct timeval tv; struct timezone tz; if (gettimeofday (&tv, &tz) < 0) return -1; tp->time = tv.tv_sec; tp->millitm = tv.tv_usec / 1000; tp->timezone = tz.tz_minuteswest; tp->dstflag = tz.tz_dsttime; return 0; } /* obsolete, changed to cygwin_tzset when localtime.c was added - dj */ extern "C" void cygwin_tzset () { } #define stupid_printf if (cygwin_finished_initializing) debug_printf void hires_us::prime () { LARGE_INTEGER ifreq; if (!QueryPerformanceFrequency (&ifreq)) { inited = -1; return; } int priority = GetThreadPriority (GetCurrentThread ()); SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL); if (!QueryPerformanceCounter (&primed_pc)) { SetThreadPriority (GetCurrentThread (), priority); inited = -1; return; } primed_ft.QuadPart = systime (); freq = (double) ((double) 1000000. / (double) ifreq.QuadPart); inited = true; SetThreadPriority (GetCurrentThread (), priority); } LONGLONG hires_us::usecs (bool justdelta) { if (!inited) prime (); if (inited < 0) { set_errno (ENOSYS); return (long long) -1; } LARGE_INTEGER now; if (!QueryPerformanceCounter (&now)) { set_errno (ENOSYS); return -1; } // FIXME: Use round() here? now.QuadPart = (LONGLONG) (freq * (double) (now.QuadPart - primed_pc.QuadPart)); LONGLONG res = justdelta ? now.QuadPart : primed_ft.QuadPart + now.QuadPart; return res; } void hires_ms::prime () { if (!inited) { int priority = GetThreadPriority (GetCurrentThread ()); SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL); initime_us = systime () - (((LONGLONG) timeGetTime ()) * 1000LL); inited = true; SetThreadPriority (GetCurrentThread (), priority); } return; } LONGLONG hires_ms::usecs () { if (!inited) prime (); LONGLONG t = systime (); LONGLONG res = initime_us + (((LONGLONG) timeGetTime ()) * 1000LL); if (res < (t - 40000LL)) { inited = false; prime (); res = initime_us + (((LONGLONG) timeGetTime ()) * 1000LL); } return res; } extern "C" int clock_gettime (clockid_t clk_id, struct timespec *tp) { if (clk_id != CLOCK_REALTIME) { set_errno (ENOSYS); return -1; } LONGLONG now = gtod.usecs (); if (now == (LONGLONG) -1) return -1; tp->tv_sec = now / 1000000; tp->tv_nsec = (now % 1000000) * 1000; return 0; } static DWORD minperiod; // FIXME: Maintain period after a fork. UINT hires_ms::resolution () { if (!minperiod) { /* Try to empirically determine current timer resolution */ int priority = GetThreadPriority (GetCurrentThread ()); SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL); DWORD period = 0; for (int i = 0; i < 4; i++) { DWORD now; DWORD then = timeGetTime (); while ((now = timeGetTime ()) == then) continue; then = now; while ((now = timeGetTime ()) == then) continue; period += now - then; } SetThreadPriority (GetCurrentThread (), priority); period /= 4; minperiod = period; } return minperiod; } extern "C" int clock_getres (clockid_t clk_id, struct timespec *tp) { if (clk_id != CLOCK_REALTIME) { set_errno (ENOSYS); return -1; } DWORD period = gtod.resolution (); tp->tv_sec = period / 1000000; tp->tv_nsec = (period % 1000000) * 1000; return 0; } extern "C" int clock_setres (clockid_t clk_id, struct timespec *tp) { static NO_COPY bool period_set; if (clk_id != CLOCK_REALTIME) { set_errno (ENOSYS); return -1; } if (period_set) timeEndPeriod (minperiod); DWORD period = (tp->tv_sec * 1000) + ((tp->tv_nsec) / 1000); if (timeBeginPeriod (period)) { minperiod = period; period_set = true; } else { __seterrno (); timeBeginPeriod (minperiod); return -1; } return 0; }