aboutsummaryrefslogtreecommitdiff
path: root/winsup/cygwin/times.cc
blob: 44a08831a9a873c8696c6089ca05332ea7ca2c1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
/* times.cc

   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 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 "cygerrno.h"
#include "security.h"
#include "path.h"
#include "fhandler.h"
#include "pinfo.h"
#include "hires.h"

#define FACTOR (0x19db1ded53e8000LL)
#define NSPERSEC 10000000LL

static void __stdcall timeval_to_filetime (timeval *time, FILETIME *out);

/* 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;

  if (check_null_invalid_struct_errno (buf))
    return ((clock_t) -1);

  DWORD ticks = GetTickCount ();
  /* Ticks is in milliseconds, convert to our ticks. Use long long to prevent
     overflow. */
  clock_t tc = (clock_t) ((long long) 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;
}

extern "C" clock_t _times (struct tms *) __attribute__((alias ("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 ()
{
#ifdef _MT_SAFE
  char *b=_reent_winsup ()->timezone_buf;
#else
  static NO_COPY char b[20] = {0};
#endif

  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);
}

/* FIXME: Make thread safe */
extern "C" int
gettimeofday (struct timeval *tv, struct timezone *tz)
{
  static hires_ms gtod;
  static bool tzflag;
  LONGLONG now = gtod.usecs (false);
  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;
}

extern "C" int _gettimeofday (struct timeval *, struct timezone *)
  __attribute__((alias ("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 */
static void __stdcall
timeval_to_filetime (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)
{
  SYSTEMTIME systemtime;
  FILETIME filetime;

  GetSystemTime (&systemtime);
  SystemTimeToFileTime (&systemtime, &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;
  SYSTEMTIME systemtime;
  FILETIME filetime;

  GetSystemTime (&systemtime);
  SystemTimeToFileTime (&systemtime, &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;
#ifdef _MT_SAFE
  struct tm &localtime_buf=_reent_winsup ()->_localtime_buf;
#else
  static NO_COPY struct tm localtime_buf = {0};
#endif

  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 */

/* utimes: standards? */
extern "C" int
utimes (const char *path, struct timeval *tvp)
{
  int res = 0;
  struct timeval tmp[2];
  path_conv win32 (path);

  if (win32.error)
    {
      set_errno (win32.error);
      syscall_printf ("-1 = utimes (%s, %x)", path, tvp);
      return -1;
    }

  /* MSDN suggests using FILE_FLAG_BACKUP_SEMANTICS for accessing
     the times of directories.  */
  /* Note: It's not documented in MSDN that FILE_WRITE_ATTRIBUTES is
     sufficient to change the timestamps... */
  HANDLE h = CreateFile (win32, FILE_WRITE_ATTRIBUTES,
			 FILE_SHARE_READ | FILE_SHARE_WRITE,
			 &sec_none_nih, OPEN_EXISTING,
			 FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS,
			 0);

  if (h == INVALID_HANDLE_VALUE)
    {
      if (win32.isdir ())
	{
	  /* What we can do with directories more? */
	  res = 0;
	}
      else
	{
	  res = -1;
	  __seterrno ();
	}
    }
  else
    {
      if (tvp == 0)
	{
	  gettimeofday (&tmp[0], 0);
	  tmp[1] = tmp[0];
	  tvp = tmp;
	}

      FILETIME lastaccess;
      FILETIME lastwrite;

      timeval_to_filetime (tvp + 0, &lastaccess);
      timeval_to_filetime (tvp + 1, &lastwrite);

      debug_printf ("incoming lastaccess %08x %08x",
		   tvp->tv_sec,
		   tvp->tv_usec);

//      dump_filetime (lastaccess);
//      dump_filetime (lastwrite);

      /* FIXME: SetFileTime needs a handle with a write lock
	 on the file whose time is being modified.  So calls to utime()
	 fail for read only files.  */

      if (!SetFileTime (h, 0, &lastaccess, &lastwrite))
	{
	  __seterrno ();
	  res = -1;
	}
      else
	res = 0;
      CloseHandle (h);
    }

  syscall_printf ("%d = utimes (%s, %x); (h%d)",
		  res, path, tvp, h);
  return res;
}

/* utime: POSIX 5.6.6.1 */
extern "C" int
utime (const char *path, 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 ()
{
}

void
hires_us::prime ()
{
  LARGE_INTEGER ifreq;
  if (!QueryPerformanceFrequency (&ifreq))
    {
      inited = -1;
      return;
    }

  FILETIME f;
  int priority = GetThreadPriority (GetCurrentThread ());
  SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);
  if (!QueryPerformanceCounter (&primed_pc))
    {
      SetThreadPriority (GetCurrentThread (), priority);
      inited = -1;
      return;
    }

  GetSystemTimeAsFileTime (&f);
  SetThreadPriority (GetCurrentThread (), priority);

  inited = 1;
  primed_ft.HighPart = f.dwHighDateTime;
  primed_ft.LowPart = f.dwLowDateTime;
  primed_ft.QuadPart -= FACTOR;
  primed_ft.QuadPart /= 10;
  freq = (double) ((double) 1000000. / (double) ifreq.QuadPart);
  return;
}

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));
  return justdelta ? now.QuadPart : primed_ft.QuadPart + now.QuadPart;
}

void
hires_ms::prime ()
{
  TIMECAPS tc;
  FILETIME f;
  int priority = GetThreadPriority (GetCurrentThread ());
  SetThreadPriority (GetCurrentThread (), THREAD_PRIORITY_TIME_CRITICAL);

  if (timeGetDevCaps (&tc, sizeof (tc)) != TIMERR_NOERROR)
    minperiod = 0;
  else
    {
      minperiod = min (max (tc.wPeriodMin, 1), tc.wPeriodMax);
      timeBeginPeriod (minperiod);
    }

  initime_ms = timeGetTime ();
  GetSystemTimeAsFileTime (&f);
  SetThreadPriority (GetCurrentThread (), priority);

  inited = 1;
  initime_us.HighPart = f.dwHighDateTime;
  initime_us.LowPart = f.dwLowDateTime;
  initime_us.QuadPart -= FACTOR;
  initime_us.QuadPart /= 10;
}

LONGLONG
hires_ms::usecs (bool justdelta)
{
  if (!inited)
    prime ();
  DWORD now = timeGetTime ();
  // FIXME: Not sure how this will handle the 49.71 day wrap around
  LONGLONG res = initime_us.QuadPart + ((LONGLONG) (now - initime_ms) * 1000);
  return res;
}

hires_ms::~hires_ms ()
{
  timeEndPeriod (minperiod);
}