FazBrowse GitHub Viewer
|
Trending
|
URL:
|
Home
Tools:
[Download Repo ZIP]
[View Raw Code]
[Original HTTPS Page]
cpython/Python/pytime.c at 2bd04d423404e5ea862c858f62af76feade4d831 · python/cpython · GitHub
python
/
cpython
Public
Uh oh!
There was an error while loading.
Please reload this page
.
Notifications
You must be signed in to change notification settings
Fork
36.1k
Star
77.2k
Code
Issues
5k+
Pull requests
2.7k
Actions
Projects
Security and quality
0
Insights
Additional navigation options
Code
Issues
Pull requests
Actions
Projects
Security and quality
Insights
Expand file tree
Breadcrumbs
cpython
/
Python
/
pytime.c
Copy path
More file actions
More file actions
Latest commit
History
History
History
1383 lines (1154 loc) · 32.7 KB
Breadcrumbs
cpython
/
Python
/
pytime.c
Copy path
File metadata and controls
1383 lines (1154 loc) · 32.7 KB
Raw
Copy raw file
Download raw file
Open symbols panel
Edit and raw actions
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
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include
"Python.h"
#include
"pycore_time.h"
// _PyTime_t
#ifdef
MS_WINDOWS
# include
<winsock2.h>
// struct timeval
#endif
#if
defined(
__APPLE__
)
# include
<mach/mach_time.h>
// mach_absolute_time(), mach_timebase_info()
#if
defined(
__APPLE__
)
&&
defined(
__has_builtin
)
# if
__has_builtin
(
__builtin_available
)
# define
HAVE_CLOCK_GETTIME_RUNTIME
__builtin_available(macOS 10.12, iOS 10.0, tvOS 10.0, watchOS 3.0, *)
# endif
#endif
#endif
/* To millisecond (10^-3) */
#define
SEC_TO_MS
1000
/* To microseconds (10^-6) */
#define
MS_TO_US
1000
#define
SEC_TO_US
(SEC_TO_MS * MS_TO_US)
/* To nanoseconds (10^-9) */
#define
US_TO_NS
1000
#define
MS_TO_NS
(MS_TO_US * US_TO_NS)
#define
SEC_TO_NS
(SEC_TO_MS * MS_TO_NS)
/* Conversion from nanoseconds */
#define
NS_TO_MS
(1000 * 1000)
#define
NS_TO_US
(1000)
#define
NS_TO_100NS
(100)
#if
SIZEOF_TIME_T
==
SIZEOF_LONG_LONG
# define
PY_TIME_T_MAX
LLONG_MAX
# define
PY_TIME_T_MIN
LLONG_MIN
#elif
SIZEOF_TIME_T
==
SIZEOF_LONG
# define
PY_TIME_T_MAX
LONG_MAX
# define
PY_TIME_T_MIN
LONG_MIN
#else
# error
"unsupported time_t size"
#endif
#if
PY_TIME_T_MAX
+
PY_TIME_T_MIN
!=
-1
# error
"time_t is not a two's complement integer type"
#endif
#if
_PyTime_MIN
+
_PyTime_MAX
!=
-1
# error
"_PyTime_t is not a two's complement integer type"
#endif
static
void
pytime_time_t_overflow
(
void
)
{
PyErr_SetString
(
PyExc_OverflowError
,
"timestamp out of range for platform time_t"
);
}
static
void
pytime_overflow
(
void
)
{
PyErr_SetString
(
PyExc_OverflowError
,
"timestamp too large to convert to C _PyTime_t"
);
}
static
inline
_PyTime_t
pytime_from_nanoseconds
(
_PyTime_t
t
)
{
// _PyTime_t is a number of nanoseconds
return
t
;
}
static
inline
_PyTime_t
pytime_as_nanoseconds
(
_PyTime_t
t
)
{
// _PyTime_t is a number of nanoseconds: see pytime_from_nanoseconds()
return
t
;
}
// Compute t1 + t2. Clamp to [_PyTime_MIN; _PyTime_MAX] on overflow.
static
inline
int
pytime_add
(
_PyTime_t
*
t1
,
_PyTime_t
t2
)
{
if
(
t2
>
0
&&
*
t1
>
_PyTime_MAX
-
t2
) {
*
t1
=
_PyTime_MAX
;
return
-1
;
}
else
if
(
t2
<
0
&&
*
t1
<
_PyTime_MIN
-
t2
) {
*
t1
=
_PyTime_MIN
;
return
-1
;
}
else
{
*
t1
+=
t2
;
return
0
;
}
}
_PyTime_t
_PyTime_Add
(
_PyTime_t
t1
,
_PyTime_t
t2
)
{
(
void
)
pytime_add
(
&
t1
,
t2
);
return
t1
;
}
static
inline
int
pytime_mul_check_overflow
(
_PyTime_t
a
,
_PyTime_t
b
)
{
if
(
b
!=
0
) {
assert
(
b
>
0
);
return
((
a
<
_PyTime_MIN
/
b
)
||
(
_PyTime_MAX
/
b
<
a
));
}
else
{
return
0
;
}
}
// Compute t * k. Clamp to [_PyTime_MIN; _PyTime_MAX] on overflow.
static
inline
int
pytime_mul
(
_PyTime_t
*
t
,
_PyTime_t
k
)
{
assert
(
k
>=
0
);
if
(
pytime_mul_check_overflow
(
*
t
,
k
)) {
*
t
=
(
*
t
>=
0
) ?
_PyTime_MAX
:
_PyTime_MIN
;
return
-1
;
}
else
{
*
t
*=
k
;
return
0
;
}
}
// Compute t * k. Clamp to [_PyTime_MIN; _PyTime_MAX] on overflow.
static
inline
_PyTime_t
_PyTime_Mul
(
_PyTime_t
t
,
_PyTime_t
k
)
{
(
void
)
pytime_mul
(
&
t
,
k
);
return
t
;
}
_PyTime_t
_PyTime_MulDiv
(
_PyTime_t
ticks
,
_PyTime_t
mul
,
_PyTime_t
div
)
{
/* Compute (ticks * mul / div) in two parts to reduce the risk of integer
overflow: compute the integer part, and then the remaining part.
(ticks * mul) / div == (ticks / div) * mul + (ticks % div) * mul / div
*/
_PyTime_t
intpart
,
remaining
;
intpart
=
ticks
/
div
;
ticks
%=
div
;
remaining
=
_PyTime_Mul
(
ticks
,
mul
) /
div
;
// intpart * mul + remaining
return
_PyTime_Add
(
_PyTime_Mul
(
intpart
,
mul
),
remaining
);
}
time_t
_PyLong_AsTime_t
(
PyObject
*
obj
)
{
#if
SIZEOF_TIME_T
==
SIZEOF_LONG_LONG
long long
val
=
PyLong_AsLongLong
(
obj
);
#elif
SIZEOF_TIME_T
<=
SIZEOF_LONG
long
val
=
PyLong_AsLong
(
obj
);
#else
# error
"unsupported time_t size"
#endif
if
(
val
==
-1
&&
PyErr_Occurred
()) {
if
(
PyErr_ExceptionMatches
(
PyExc_OverflowError
)) {
pytime_time_t_overflow
();
}
return
-1
;
}
return
(
time_t
)
val
;
}
PyObject
*
_PyLong_FromTime_t
(
time_t
t
)
{
#if
SIZEOF_TIME_T
==
SIZEOF_LONG_LONG
return
PyLong_FromLongLong
((
long long
)
t
);
#elif
SIZEOF_TIME_T
<=
SIZEOF_LONG
return
PyLong_FromLong
((
long
)
t
);
#else
# error
"unsupported time_t size"
#endif
}
// Convert _PyTime_t to time_t.
// Return 0 on success. Return -1 and clamp the value on overflow.
static
int
_PyTime_AsTime_t
(
_PyTime_t
t
,
time_t
*
t2
)
{
#if
SIZEOF_TIME_T
<
_SIZEOF_PYTIME_T
if
((
_PyTime_t
)
PY_TIME_T_MAX
<
t
) {
*
t2
=
PY_TIME_T_MAX
;
return
-1
;
}
if
(
t
<
(
_PyTime_t
)
PY_TIME_T_MIN
) {
*
t2
=
PY_TIME_T_MIN
;
return
-1
;
}
#endif
*
t2
=
(
time_t
)
t
;
return
0
;
}
#ifdef
MS_WINDOWS
// Convert _PyTime_t to long.
// Return 0 on success. Return -1 and clamp the value on overflow.
static
int
_PyTime_AsLong
(
_PyTime_t
t
,
long
*
t2
)
{
#if
SIZEOF_LONG
<
_SIZEOF_PYTIME_T
if
((
_PyTime_t
)
LONG_MAX
<
t
) {
*
t2
=
LONG_MAX
;
return
-1
;
}
if
(
t
<
(
_PyTime_t
)
LONG_MIN
) {
*
t2
=
LONG_MIN
;
return
-1
;
}
#endif
*
t2
=
(
long
)
t
;
return
0
;
}
#endif
/* Round to nearest with ties going to nearest even integer
(_PyTime_ROUND_HALF_EVEN) */
static
double
pytime_round_half_even
(
double
x
)
{
double
rounded
=
round
(
x
);
if
(
fabs
(
x
-
rounded
)
==
0.5
) {
/* halfway case: round to even */
rounded
=
2.0
*
round
(
x
/
2.0
);
}
return
rounded
;
}
static
double
pytime_round
(
double
x
,
_PyTime_round_t
round
)
{
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
d
;
d
=
x
;
if
(
round
==
_PyTime_ROUND_HALF_EVEN
) {
d
=
pytime_round_half_even
(
d
);
}
else
if
(
round
==
_PyTime_ROUND_CEILING
) {
d
=
ceil
(
d
);
}
else
if
(
round
==
_PyTime_ROUND_FLOOR
) {
d
=
floor
(
d
);
}
else
{
assert
(
round
==
_PyTime_ROUND_UP
);
d
=
(
d
>=
0.0
) ?
ceil
(
d
) :
floor
(
d
);
}
return
d
;
}
static
int
pytime_double_to_denominator
(
double
d
,
time_t
*
sec
,
long
*
numerator
,
long
idenominator
,
_PyTime_round_t
round
)
{
double
denominator
=
(
double
)
idenominator
;
double
intpart
;
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
floatpart
;
floatpart
=
modf
(
d
,
&
intpart
);
floatpart
*=
denominator
;
floatpart
=
pytime_round
(
floatpart
,
round
);
if
(
floatpart
>=
denominator
) {
floatpart
-=
denominator
;
intpart
+=
1.0
;
}
else
if
(
floatpart
<
0
) {
floatpart
+=
denominator
;
intpart
-=
1.0
;
}
assert
(
0.0
<=
floatpart
&&
floatpart
<
denominator
);
/*
Conversion of an out-of-range value to time_t gives undefined behaviour
(C99 §6.3.1.4p1), so we must guard against it. However, checking that
`intpart` is in range is delicate: the obvious expression `intpart <=
PY_TIME_T_MAX` will first convert the value `PY_TIME_T_MAX` to a double,
potentially changing its value and leading to us failing to catch some
UB-inducing values. The code below works correctly under the mild
assumption that time_t is a two's complement integer type with no trap
representation, and that `PY_TIME_T_MIN` is within the representable
range of a C double.
Note: we want the `if` condition below to be true for NaNs; therefore,
resist any temptation to simplify by applying De Morgan's laws.
*/
if
(!((
double
)
PY_TIME_T_MIN
<=
intpart
&&
intpart
<
-
(
double
)
PY_TIME_T_MIN
)) {
pytime_time_t_overflow
();
return
-1
;
}
*
sec
=
(
time_t
)
intpart
;
*
numerator
=
(
long
)
floatpart
;
assert
(
0
<=
*
numerator
&&
*
numerator
<
idenominator
);
return
0
;
}
static
int
pytime_object_to_denominator
(
PyObject
*
obj
,
time_t
*
sec
,
long
*
numerator
,
long
denominator
,
_PyTime_round_t
round
)
{
assert
(
denominator
>=
1
);
if
(
PyFloat_Check
(
obj
)) {
double
d
=
PyFloat_AsDouble
(
obj
);
if
(
Py_IS_NAN
(
d
)) {
*
numerator
=
0
;
PyErr_SetString
(
PyExc_ValueError
,
"Invalid value NaN (not a number)"
);
return
-1
;
}
return
pytime_double_to_denominator
(
d
,
sec
,
numerator
,
denominator
,
round
);
}
else
{
*
sec
=
_PyLong_AsTime_t
(
obj
);
*
numerator
=
0
;
if
(
*
sec
==
(
time_t
)
-
1
&&
PyErr_Occurred
()) {
return
-1
;
}
return
0
;
}
}
int
_PyTime_ObjectToTime_t
(
PyObject
*
obj
,
time_t
*
sec
,
_PyTime_round_t
round
)
{
if
(
PyFloat_Check
(
obj
)) {
double
intpart
;
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
d
;
d
=
PyFloat_AsDouble
(
obj
);
if
(
Py_IS_NAN
(
d
)) {
PyErr_SetString
(
PyExc_ValueError
,
"Invalid value NaN (not a number)"
);
return
-1
;
}
d
=
pytime_round
(
d
,
round
);
(
void
)
modf
(
d
,
&
intpart
);
/* See comments in pytime_double_to_denominator */
if
(!((
double
)
PY_TIME_T_MIN
<=
intpart
&&
intpart
<
-
(
double
)
PY_TIME_T_MIN
)) {
pytime_time_t_overflow
();
return
-1
;
}
*
sec
=
(
time_t
)
intpart
;
return
0
;
}
else
{
*
sec
=
_PyLong_AsTime_t
(
obj
);
if
(
*
sec
==
(
time_t
)
-
1
&&
PyErr_Occurred
()) {
return
-1
;
}
return
0
;
}
}
int
_PyTime_ObjectToTimespec
(
PyObject
*
obj
,
time_t
*
sec
,
long
*
nsec
,
_PyTime_round_t
round
)
{
return
pytime_object_to_denominator
(
obj
,
sec
,
nsec
,
SEC_TO_NS
,
round
);
}
int
_PyTime_ObjectToTimeval
(
PyObject
*
obj
,
time_t
*
sec
,
long
*
usec
,
_PyTime_round_t
round
)
{
return
pytime_object_to_denominator
(
obj
,
sec
,
usec
,
SEC_TO_US
,
round
);
}
_PyTime_t
_PyTime_FromSeconds
(
int
seconds
)
{
/* ensure that integer overflow cannot happen, int type should have 32
bits, whereas _PyTime_t type has at least 64 bits (SEC_TO_NS takes 30
bits). */
static_assert
(
INT_MAX
<=
_PyTime_MAX
/
SEC_TO_NS
,
"_PyTime_t overflow"
);
static_assert
(
INT_MIN
>=
_PyTime_MIN
/
SEC_TO_NS
,
"_PyTime_t underflow"
);
_PyTime_t
t
=
(
_PyTime_t
)
seconds
;
assert
((
t
>=
0
&&
t
<=
_PyTime_MAX
/
SEC_TO_NS
)
||
(
t
<
0
&&
t
>=
_PyTime_MIN
/
SEC_TO_NS
));
t
*=
SEC_TO_NS
;
return
pytime_from_nanoseconds
(
t
);
}
_PyTime_t
_PyTime_FromNanoseconds
(
_PyTime_t
ns
)
{
return
pytime_from_nanoseconds
(
ns
);
}
_PyTime_t
_PyTime_FromMicrosecondsClamp
(
_PyTime_t
us
)
{
_PyTime_t
ns
=
_PyTime_Mul
(
us
,
US_TO_NS
);
return
pytime_from_nanoseconds
(
ns
);
}
int
_PyTime_FromNanosecondsObject
(
_PyTime_t
*
tp
,
PyObject
*
obj
)
{
if
(!
PyLong_Check
(
obj
)) {
PyErr_Format
(
PyExc_TypeError
,
"expect int, got %s"
,
Py_TYPE
(
obj
)
->
tp_name
);
return
-1
;
}
static_assert
(
sizeof
(
long long
)
==
sizeof
(
_PyTime_t
),
"_PyTime_t is not long long"
);
long long
nsec
=
PyLong_AsLongLong
(
obj
);
if
(
nsec
==
-1
&&
PyErr_Occurred
()) {
if
(
PyErr_ExceptionMatches
(
PyExc_OverflowError
)) {
pytime_overflow
();
}
return
-1
;
}
_PyTime_t
t
=
(
_PyTime_t
)
nsec
;
*
tp
=
pytime_from_nanoseconds
(
t
);
return
0
;
}
#ifdef
HAVE_CLOCK_GETTIME
static
int
pytime_fromtimespec
(
_PyTime_t
*
tp
,
struct
timespec
*
ts
,
int
raise_exc
)
{
_PyTime_t
t
,
tv_nsec
;
static_assert
(
sizeof
(
ts
->
tv_sec
) <=
sizeof
(
_PyTime_t
),
"timespec.tv_sec is larger than _PyTime_t"
);
t
=
(
_PyTime_t
)
ts
->
tv_sec
;
int
res1
=
pytime_mul
(
&
t
,
SEC_TO_NS
);
tv_nsec
=
ts
->
tv_nsec
;
int
res2
=
pytime_add
(
&
t
,
tv_nsec
);
*
tp
=
pytime_from_nanoseconds
(
t
);
if
(
raise_exc
&&
(
res1
<
0
||
res2
<
0
)) {
pytime_overflow
();
return
-1
;
}
return
0
;
}
int
_PyTime_FromTimespec
(
_PyTime_t
*
tp
,
struct
timespec
*
ts
)
{
return
pytime_fromtimespec
(
tp
,
ts
,
1
);
}
#endif
#ifndef
MS_WINDOWS
static
int
pytime_fromtimeval
(
_PyTime_t
*
tp
,
struct
timeval
*
tv
,
int
raise_exc
)
{
static_assert
(
sizeof
(
tv
->
tv_sec
) <=
sizeof
(
_PyTime_t
),
"timeval.tv_sec is larger than _PyTime_t"
);
_PyTime_t
t
=
(
_PyTime_t
)
tv
->
tv_sec
;
int
res1
=
pytime_mul
(
&
t
,
SEC_TO_NS
);
_PyTime_t
usec
=
(
_PyTime_t
)
tv
->
tv_usec
*
US_TO_NS
;
int
res2
=
pytime_add
(
&
t
,
usec
);
*
tp
=
pytime_from_nanoseconds
(
t
);
if
(
raise_exc
&&
(
res1
<
0
||
res2
<
0
)) {
pytime_overflow
();
return
-1
;
}
return
0
;
}
int
_PyTime_FromTimeval
(
_PyTime_t
*
tp
,
struct
timeval
*
tv
)
{
return
pytime_fromtimeval
(
tp
,
tv
,
1
);
}
#endif
static
int
pytime_from_double
(
_PyTime_t
*
tp
,
double
value
,
_PyTime_round_t
round
,
long
unit_to_ns
)
{
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
d
;
/* convert to a number of nanoseconds */
d
=
value
;
d
*= (
double
)
unit_to_ns
;
d
=
pytime_round
(
d
,
round
);
/* See comments in pytime_double_to_denominator */
if
(!((
double
)
_PyTime_MIN
<=
d
&&
d
<
-
(
double
)
_PyTime_MIN
)) {
pytime_time_t_overflow
();
return
-1
;
}
_PyTime_t
ns
=
(
_PyTime_t
)
d
;
*
tp
=
pytime_from_nanoseconds
(
ns
);
return
0
;
}
static
int
pytime_from_object
(
_PyTime_t
*
tp
,
PyObject
*
obj
,
_PyTime_round_t
round
,
long
unit_to_ns
)
{
if
(
PyFloat_Check
(
obj
)) {
double
d
;
d
=
PyFloat_AsDouble
(
obj
);
if
(
Py_IS_NAN
(
d
)) {
PyErr_SetString
(
PyExc_ValueError
,
"Invalid value NaN (not a number)"
);
return
-1
;
}
return
pytime_from_double
(
tp
,
d
,
round
,
unit_to_ns
);
}
else
{
long long
sec
=
PyLong_AsLongLong
(
obj
);
if
(
sec
==
-1
&&
PyErr_Occurred
()) {
if
(
PyErr_ExceptionMatches
(
PyExc_OverflowError
)) {
pytime_overflow
();
}
return
-1
;
}
static_assert
(
sizeof
(
long long
) <=
sizeof
(
_PyTime_t
),
"_PyTime_t is smaller than long long"
);
_PyTime_t
ns
=
(
_PyTime_t
)
sec
;
if
(
pytime_mul
(
&
ns
,
unit_to_ns
)
<
0
) {
pytime_overflow
();
return
-1
;
}
*
tp
=
pytime_from_nanoseconds
(
ns
);
return
0
;
}
}
int
_PyTime_FromSecondsObject
(
_PyTime_t
*
tp
,
PyObject
*
obj
,
_PyTime_round_t
round
)
{
return
pytime_from_object
(
tp
,
obj
,
round
,
SEC_TO_NS
);
}
int
_PyTime_FromMillisecondsObject
(
_PyTime_t
*
tp
,
PyObject
*
obj
,
_PyTime_round_t
round
)
{
return
pytime_from_object
(
tp
,
obj
,
round
,
MS_TO_NS
);
}
double
_PyTime_AsSecondsDouble
(
_PyTime_t
t
)
{
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
d
;
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
if
(
ns
%
SEC_TO_NS
==
0
) {
/* Divide using integers to avoid rounding issues on the integer part.
1e-9 cannot be stored exactly in IEEE 64-bit. */
_PyTime_t
secs
=
ns
/
SEC_TO_NS
;
d
=
(
double
)
secs
;
}
else
{
d
=
(
double
)
ns
;
d
/=
1e9
;
}
return
d
;
}
PyObject
*
_PyTime_AsNanosecondsObject
(
_PyTime_t
t
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
static_assert
(
sizeof
(
long long
) >=
sizeof
(
_PyTime_t
),
"_PyTime_t is larger than long long"
);
return
PyLong_FromLongLong
((
long long
)
ns
);
}
static
_PyTime_t
pytime_divide_round_up
(
const
_PyTime_t
t
,
const
_PyTime_t
k
)
{
assert
(
k
>
1
);
if
(
t
>=
0
) {
// Don't use (t + k - 1) / k to avoid integer overflow
// if t is equal to _PyTime_MAX
_PyTime_t
q
=
t
/
k
;
if
(
t
%
k
) {
q
+=
1
;
}
return
q
;
}
else
{
// Don't use (t - (k - 1)) / k to avoid integer overflow
// if t is equals to _PyTime_MIN.
_PyTime_t
q
=
t
/
k
;
if
(
t
%
k
) {
q
-=
1
;
}
return
q
;
}
}
static
_PyTime_t
pytime_divide
(
const
_PyTime_t
t
,
const
_PyTime_t
k
,
const
_PyTime_round_t
round
)
{
assert
(
k
>
1
);
if
(
round
==
_PyTime_ROUND_HALF_EVEN
) {
_PyTime_t
x
=
t
/
k
;
_PyTime_t
r
=
t
%
k
;
_PyTime_t
abs_r
=
Py_ABS
(
r
);
if
(
abs_r
>
k
/
2
||
(
abs_r
==
k
/
2
&&
(
Py_ABS
(
x
)
&
1
))) {
if
(
t
>=
0
) {
x
++
;
}
else
{
x
--
;
}
}
return
x
;
}
else
if
(
round
==
_PyTime_ROUND_CEILING
) {
if
(
t
>=
0
) {
return
pytime_divide_round_up
(
t
,
k
);
}
else
{
return
t
/
k
;
}
}
else
if
(
round
==
_PyTime_ROUND_FLOOR
){
if
(
t
>=
0
) {
return
t
/
k
;
}
else
{
return
pytime_divide_round_up
(
t
,
k
);
}
}
else
{
assert
(
round
==
_PyTime_ROUND_UP
);
return
pytime_divide_round_up
(
t
,
k
);
}
}
// Compute (t / k, t % k) in (pq, pr).
// Make sure that 0 <= pr < k.
// Return 0 on success.
// Return -1 on underflow and store (_PyTime_MIN, 0) in (pq, pr).
static
int
pytime_divmod
(
const
_PyTime_t
t
,
const
_PyTime_t
k
,
_PyTime_t
*
pq
,
_PyTime_t
*
pr
)
{
assert
(
k
>
1
);
_PyTime_t
q
=
t
/
k
;
_PyTime_t
r
=
t
%
k
;
if
(
r
<
0
) {
if
(
q
==
_PyTime_MIN
) {
*
pq
=
_PyTime_MIN
;
*
pr
=
0
;
return
-1
;
}
r
+=
k
;
q
-=
1
;
}
assert
(
0
<=
r
&&
r
<
k
);
*
pq
=
q
;
*
pr
=
r
;
return
0
;
}
_PyTime_t
_PyTime_AsNanoseconds
(
_PyTime_t
t
)
{
return
pytime_as_nanoseconds
(
t
);
}
#ifdef
MS_WINDOWS
_PyTime_t
_PyTime_As100Nanoseconds
(
_PyTime_t
t
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
return
pytime_divide
(
ns
,
NS_TO_100NS
,
round
);
}
#endif
_PyTime_t
_PyTime_AsMicroseconds
(
_PyTime_t
t
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
return
pytime_divide
(
ns
,
NS_TO_US
,
round
);
}
_PyTime_t
_PyTime_AsMilliseconds
(
_PyTime_t
t
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
return
pytime_divide
(
ns
,
NS_TO_MS
,
round
);
}
static
int
pytime_as_timeval
(
_PyTime_t
t
,
_PyTime_t
*
ptv_sec
,
int
*
ptv_usec
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
_PyTime_t
us
=
pytime_divide
(
ns
,
US_TO_NS
,
round
);
_PyTime_t
tv_sec
,
tv_usec
;
int
res
=
pytime_divmod
(
us
,
SEC_TO_US
,
&
tv_sec
,
&
tv_usec
);
*
ptv_sec
=
tv_sec
;
*
ptv_usec
=
(
int
)
tv_usec
;
return
res
;
}
static
int
pytime_as_timeval_struct
(
_PyTime_t
t
,
struct
timeval
*
tv
,
_PyTime_round_t
round
,
int
raise_exc
)
{
_PyTime_t
tv_sec
;
int
tv_usec
;
int
res
=
pytime_as_timeval
(
t
,
&
tv_sec
,
&
tv_usec
,
round
);
int
res2
;
#ifdef
MS_WINDOWS
// On Windows, timeval.tv_sec type is long
res2
=
_PyTime_AsLong
(
tv_sec
,
&
tv
->
tv_sec
);
#else
res2
=
_PyTime_AsTime_t
(
tv_sec
,
&
tv
->
tv_sec
);
#endif
if
(
res2
<
0
) {
tv_usec
=
0
;
}
tv
->
tv_usec
=
tv_usec
;
if
(
raise_exc
&&
(
res
<
0
||
res2
<
0
)) {
pytime_time_t_overflow
();
return
-1
;
}
return
0
;
}
int
_PyTime_AsTimeval
(
_PyTime_t
t
,
struct
timeval
*
tv
,
_PyTime_round_t
round
)
{
return
pytime_as_timeval_struct
(
t
,
tv
,
round
,
1
);
}
void
_PyTime_AsTimeval_clamp
(
_PyTime_t
t
,
struct
timeval
*
tv
,
_PyTime_round_t
round
)
{
(
void
)
pytime_as_timeval_struct
(
t
,
tv
,
round
,
0
);
}
int
_PyTime_AsTimevalTime_t
(
_PyTime_t
t
,
time_t
*
p_secs
,
int
*
us
,
_PyTime_round_t
round
)
{
_PyTime_t
secs
;
if
(
pytime_as_timeval
(
t
,
&
secs
,
us
,
round
)
<
0
) {
pytime_time_t_overflow
();
return
-1
;
}
if
(
_PyTime_AsTime_t
(
secs
,
p_secs
)
<
0
) {
pytime_time_t_overflow
();
return
-1
;
}
return
0
;
}
#if
defined(
HAVE_CLOCK_GETTIME
)
||
defined(
HAVE_KQUEUE
)
static
int
pytime_as_timespec
(
_PyTime_t
t
,
struct
timespec
*
ts
,
int
raise_exc
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
_PyTime_t
tv_sec
,
tv_nsec
;
int
res
=
pytime_divmod
(
ns
,
SEC_TO_NS
,
&
tv_sec
,
&
tv_nsec
);
int
res2
=
_PyTime_AsTime_t
(
tv_sec
,
&
ts
->
tv_sec
);
if
(
res2
<
0
) {
tv_nsec
=
0
;
}
ts
->
tv_nsec
=
tv_nsec
;
if
(
raise_exc
&&
(
res
<
0
||
res2
<
0
)) {
pytime_time_t_overflow
();
return
-1
;
}
return
0
;
}
void
_PyTime_AsTimespec_clamp
(
_PyTime_t
t
,
struct
timespec
*
ts
)
{
(
void
)
pytime_as_timespec
(
t
,
ts
,
0
);
}
int
_PyTime_AsTimespec
(
_PyTime_t
t
,
struct
timespec
*
ts
)
{
return
pytime_as_timespec
(
t
,
ts
,
1
);
}
#endif
static
int
py_get_system_clock
(
_PyTime_t
*
tp
,
_Py_clock_info_t
*
info
,
int
raise_exc
)
{
assert
(
info
==
NULL
||
raise_exc
);
#ifdef
MS_WINDOWS
FILETIME
system_time
;
ULARGE_INTEGER
large
;
GetSystemTimeAsFileTime
(
&
system_time
);
large
.
u
.
LowPart
=
system_time
.
dwLowDateTime
;
large
.
u
.
HighPart
=
system_time
.
dwHighDateTime
;
/* 11,644,473,600,000,000,000: number of nanoseconds between
the 1st january 1601 and the 1st january 1970 (369 years + 89 leap
days). */
_PyTime_t
ns
=
large
.
QuadPart
*
100
-
11644473600000000000
;
*
tp
=
pytime_from_nanoseconds
(
ns
);
if
(
info
) {
DWORD
timeAdjustment
,
timeIncrement
;
BOOL
isTimeAdjustmentDisabled
,
ok
;
info
->
implementation
=
"GetSystemTimeAsFileTime()"
;
info
->
monotonic
=
0
;
ok
=
GetSystemTimeAdjustment
(
&
timeAdjustment
,
&
timeIncrement
,
&
isTimeAdjustmentDisabled
);
if
(!
ok
) {
PyErr_SetFromWindowsErr
(
0
);
return
-1
;
}
info
->
resolution
=
timeIncrement
*
1e-7
;
info
->
adjustable
=
1
;
}
#else
/* MS_WINDOWS */
int
err
;
#if
defined(
HAVE_CLOCK_GETTIME
)
struct
timespec
ts
;
#endif
#if
!defined(
HAVE_CLOCK_GETTIME
)
||
defined(
__APPLE__
)
struct
timeval
tv
;
#endif
#ifdef
HAVE_CLOCK_GETTIME
#ifdef
HAVE_CLOCK_GETTIME_RUNTIME
if
(
HAVE_CLOCK_GETTIME_RUNTIME
) {
#endif
err
=
clock_gettime
(
CLOCK_REALTIME
,
&
ts
);
if
(
err
) {
if
(
raise_exc
) {
PyErr_SetFromErrno
(
PyExc_OSError
);
}
return
-1
;
}
if
(
pytime_fromtimespec
(
tp
,
&
ts
,
raise_exc
)
<
0
) {
return
-1
;
}
if
(
info
) {
struct
timespec
res
;
info
->
implementation
=
"clock_gettime(CLOCK_REALTIME)"
;
info
->
monotonic
=
0
;
info
->
adjustable
=
1
;
if
(
clock_getres
(
CLOCK_REALTIME
,
&
res
)
==
0
) {
info
->
resolution
=
(
double
)
res
.
tv_sec
+
(
double
)
res
.
tv_nsec
*
1e-9
;
}
else
{
info
->
resolution
=
1e-9
;
}
}
#ifdef
HAVE_CLOCK_GETTIME_RUNTIME
}
else
{
#endif
#endif
#if
!defined(
HAVE_CLOCK_GETTIME
)
||
defined(
HAVE_CLOCK_GETTIME_RUNTIME
)
/* test gettimeofday() */
err
=
gettimeofday
(
&
tv
, (
struct
timezone
*
)
NULL
);
if
(
err
) {
if
(
raise_exc
) {
PyErr_SetFromErrno
(
PyExc_OSError
);
}
return
-1
;
}
if
(
pytime_fromtimeval
(
tp
,
&
tv
,
raise_exc
)
<
0
) {
return
-1
;
}
if
(
info
) {
info
->
implementation
=
"gettimeofday()"
;
info
->
resolution
=
1e-6
;
info
->
monotonic
=
0
;
info
->
adjustable
=
1
;
}
#if
defined(
HAVE_CLOCK_GETTIME_RUNTIME
)
&&
defined(
HAVE_CLOCK_GETTIME
)
}
/* end of availability block */
#endif
#endif
/* !HAVE_CLOCK_GETTIME */
#endif
/* !MS_WINDOWS */
return
0
;
}
_PyTime_t
_PyTime_GetSystemClock
(
void
)
{
_PyTime_t
t
;
if
(
py_get_system_clock
(
&
t
,
NULL
,
0
)
<
0
) {
// If clock_gettime(CLOCK_REALTIME) or gettimeofday() fails:
// silently ignore the failure and return 0.
t
=
0
;
}
return
t
;
}
int
_PyTime_GetSystemClockWithInfo
(
_PyTime_t
*
t
,
_Py_clock_info_t
*
info
)
{
return
py_get_system_clock
(
t
,
info
,
1
);
}
View remainder of file in raw view
Back
|
FazBrowse Home
|
New Git URL