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newlib/winsup/cygwin/times.cc

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/* 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 <time.h>
#include <sys/times.h>
#include <sys/timeb.h>
#include <utime.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#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 / 1000;
tp->tv_nsec = (period % 1000) * 1000000;
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) / 1000000);
if (timeBeginPeriod (period))
{
minperiod = period;
period_set = true;
}
else
{
__seterrno ();
timeBeginPeriod (minperiod);
return -1;
}
return 0;
}
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