aboutsummaryrefslogtreecommitdiff
path: root/vendor/golang.org/x/sys/windows/syscall_windows.go
blob: c71bad127d3f29672cbf2df68f67ecbda73cfda3 (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
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Windows system calls.

package windows

import (
	errorspkg "errors"
	"sync"
	"syscall"
	"time"
	"unicode/utf16"
	"unsafe"

	"golang.org/x/sys/internal/unsafeheader"
)

type Handle uintptr

const (
	InvalidHandle = ^Handle(0)

	// Flags for DefineDosDevice.
	DDD_EXACT_MATCH_ON_REMOVE = 0x00000004
	DDD_NO_BROADCAST_SYSTEM   = 0x00000008
	DDD_RAW_TARGET_PATH       = 0x00000001
	DDD_REMOVE_DEFINITION     = 0x00000002

	// Return values for GetDriveType.
	DRIVE_UNKNOWN     = 0
	DRIVE_NO_ROOT_DIR = 1
	DRIVE_REMOVABLE   = 2
	DRIVE_FIXED       = 3
	DRIVE_REMOTE      = 4
	DRIVE_CDROM       = 5
	DRIVE_RAMDISK     = 6

	// File system flags from GetVolumeInformation and GetVolumeInformationByHandle.
	FILE_CASE_SENSITIVE_SEARCH        = 0x00000001
	FILE_CASE_PRESERVED_NAMES         = 0x00000002
	FILE_FILE_COMPRESSION             = 0x00000010
	FILE_DAX_VOLUME                   = 0x20000000
	FILE_NAMED_STREAMS                = 0x00040000
	FILE_PERSISTENT_ACLS              = 0x00000008
	FILE_READ_ONLY_VOLUME             = 0x00080000
	FILE_SEQUENTIAL_WRITE_ONCE        = 0x00100000
	FILE_SUPPORTS_ENCRYPTION          = 0x00020000
	FILE_SUPPORTS_EXTENDED_ATTRIBUTES = 0x00800000
	FILE_SUPPORTS_HARD_LINKS          = 0x00400000
	FILE_SUPPORTS_OBJECT_IDS          = 0x00010000
	FILE_SUPPORTS_OPEN_BY_FILE_ID     = 0x01000000
	FILE_SUPPORTS_REPARSE_POINTS      = 0x00000080
	FILE_SUPPORTS_SPARSE_FILES        = 0x00000040
	FILE_SUPPORTS_TRANSACTIONS        = 0x00200000
	FILE_SUPPORTS_USN_JOURNAL         = 0x02000000
	FILE_UNICODE_ON_DISK              = 0x00000004
	FILE_VOLUME_IS_COMPRESSED         = 0x00008000
	FILE_VOLUME_QUOTAS                = 0x00000020

	// Flags for LockFileEx.
	LOCKFILE_FAIL_IMMEDIATELY = 0x00000001
	LOCKFILE_EXCLUSIVE_LOCK   = 0x00000002

	// Return values of SleepEx and other APC functions
	STATUS_USER_APC    = 0x000000C0
	WAIT_IO_COMPLETION = STATUS_USER_APC
)

// StringToUTF16 is deprecated. Use UTF16FromString instead.
// If s contains a NUL byte this function panics instead of
// returning an error.
func StringToUTF16(s string) []uint16 {
	a, err := UTF16FromString(s)
	if err != nil {
		panic("windows: string with NUL passed to StringToUTF16")
	}
	return a
}

// UTF16FromString returns the UTF-16 encoding of the UTF-8 string
// s, with a terminating NUL added. If s contains a NUL byte at any
// location, it returns (nil, syscall.EINVAL).
func UTF16FromString(s string) ([]uint16, error) {
	for i := 0; i < len(s); i++ {
		if s[i] == 0 {
			return nil, syscall.EINVAL
		}
	}
	return utf16.Encode([]rune(s + "\x00")), nil
}

// UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s,
// with a terminating NUL and any bytes after the NUL removed.
func UTF16ToString(s []uint16) string {
	for i, v := range s {
		if v == 0 {
			s = s[:i]
			break
		}
	}
	return string(utf16.Decode(s))
}

// StringToUTF16Ptr is deprecated. Use UTF16PtrFromString instead.
// If s contains a NUL byte this function panics instead of
// returning an error.
func StringToUTF16Ptr(s string) *uint16 { return &StringToUTF16(s)[0] }

// UTF16PtrFromString returns pointer to the UTF-16 encoding of
// the UTF-8 string s, with a terminating NUL added. If s
// contains a NUL byte at any location, it returns (nil, syscall.EINVAL).
func UTF16PtrFromString(s string) (*uint16, error) {
	a, err := UTF16FromString(s)
	if err != nil {
		return nil, err
	}
	return &a[0], nil
}

// UTF16PtrToString takes a pointer to a UTF-16 sequence and returns the corresponding UTF-8 encoded string.
// If the pointer is nil, it returns the empty string. It assumes that the UTF-16 sequence is terminated
// at a zero word; if the zero word is not present, the program may crash.
func UTF16PtrToString(p *uint16) string {
	if p == nil {
		return ""
	}
	if *p == 0 {
		return ""
	}

	// Find NUL terminator.
	n := 0
	for ptr := unsafe.Pointer(p); *(*uint16)(ptr) != 0; n++ {
		ptr = unsafe.Pointer(uintptr(ptr) + unsafe.Sizeof(*p))
	}

	var s []uint16
	h := (*unsafeheader.Slice)(unsafe.Pointer(&s))
	h.Data = unsafe.Pointer(p)
	h.Len = n
	h.Cap = n

	return string(utf16.Decode(s))
}

func Getpagesize() int { return 4096 }

// NewCallback converts a Go function to a function pointer conforming to the stdcall calling convention.
// This is useful when interoperating with Windows code requiring callbacks.
// The argument is expected to be a function with with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr.
func NewCallback(fn interface{}) uintptr {
	return syscall.NewCallback(fn)
}

// NewCallbackCDecl converts a Go function to a function pointer conforming to the cdecl calling convention.
// This is useful when interoperating with Windows code requiring callbacks.
// The argument is expected to be a function with with one uintptr-sized result. The function must not have arguments with size larger than the size of uintptr.
func NewCallbackCDecl(fn interface{}) uintptr {
	return syscall.NewCallbackCDecl(fn)
}

// windows api calls

//sys	GetLastError() (lasterr error)
//sys	LoadLibrary(libname string) (handle Handle, err error) = LoadLibraryW
//sys	LoadLibraryEx(libname string, zero Handle, flags uintptr) (handle Handle, err error) = LoadLibraryExW
//sys	FreeLibrary(handle Handle) (err error)
//sys	GetProcAddress(module Handle, procname string) (proc uintptr, err error)
//sys	GetModuleFileName(module Handle, filename *uint16, size uint32) (n uint32, err error) = kernel32.GetModuleFileNameW
//sys	GetModuleHandleEx(flags uint32, moduleName *uint16, module *Handle) (err error) = kernel32.GetModuleHandleExW
//sys	SetDefaultDllDirectories(directoryFlags uint32) (err error)
//sys	SetDllDirectory(path string) (err error) = kernel32.SetDllDirectoryW
//sys	GetVersion() (ver uint32, err error)
//sys	FormatMessage(flags uint32, msgsrc uintptr, msgid uint32, langid uint32, buf []uint16, args *byte) (n uint32, err error) = FormatMessageW
//sys	ExitProcess(exitcode uint32)
//sys	IsWow64Process(handle Handle, isWow64 *bool) (err error) = IsWow64Process
//sys	IsWow64Process2(handle Handle, processMachine *uint16, nativeMachine *uint16) (err error) = IsWow64Process2?
//sys	CreateFile(name *uint16, access uint32, mode uint32, sa *SecurityAttributes, createmode uint32, attrs uint32, templatefile Handle) (handle Handle, err error) [failretval==InvalidHandle] = CreateFileW
//sys	ReadFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
//sys	WriteFile(handle Handle, buf []byte, done *uint32, overlapped *Overlapped) (err error)
//sys	GetOverlappedResult(handle Handle, overlapped *Overlapped, done *uint32, wait bool) (err error)
//sys	SetFilePointer(handle Handle, lowoffset int32, highoffsetptr *int32, whence uint32) (newlowoffset uint32, err error) [failretval==0xffffffff]
//sys	CloseHandle(handle Handle) (err error)
//sys	GetStdHandle(stdhandle uint32) (handle Handle, err error) [failretval==InvalidHandle]
//sys	SetStdHandle(stdhandle uint32, handle Handle) (err error)
//sys	findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstFileW
//sys	findNextFile1(handle Handle, data *win32finddata1) (err error) = FindNextFileW
//sys	FindClose(handle Handle) (err error)
//sys	GetFileInformationByHandle(handle Handle, data *ByHandleFileInformation) (err error)
//sys	GetFileInformationByHandleEx(handle Handle, class uint32, outBuffer *byte, outBufferLen uint32) (err error)
//sys	SetFileInformationByHandle(handle Handle, class uint32, inBuffer *byte, inBufferLen uint32) (err error)
//sys	GetCurrentDirectory(buflen uint32, buf *uint16) (n uint32, err error) = GetCurrentDirectoryW
//sys	SetCurrentDirectory(path *uint16) (err error) = SetCurrentDirectoryW
//sys	CreateDirectory(path *uint16, sa *SecurityAttributes) (err error) = CreateDirectoryW
//sys	RemoveDirectory(path *uint16) (err error) = RemoveDirectoryW
//sys	DeleteFile(path *uint16) (err error) = DeleteFileW
//sys	MoveFile(from *uint16, to *uint16) (err error) = MoveFileW
//sys	MoveFileEx(from *uint16, to *uint16, flags uint32) (err error) = MoveFileExW
//sys	LockFileEx(file Handle, flags uint32, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *Overlapped) (err error)
//sys	UnlockFileEx(file Handle, reserved uint32, bytesLow uint32, bytesHigh uint32, overlapped *Overlapped) (err error)
//sys	GetComputerName(buf *uint16, n *uint32) (err error) = GetComputerNameW
//sys	GetComputerNameEx(nametype uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW
//sys	SetEndOfFile(handle Handle) (err error)
//sys	GetSystemTimeAsFileTime(time *Filetime)
//sys	GetSystemTimePreciseAsFileTime(time *Filetime)
//sys	GetTimeZoneInformation(tzi *Timezoneinformation) (rc uint32, err error) [failretval==0xffffffff]
//sys	CreateIoCompletionPort(filehandle Handle, cphandle Handle, key uint32, threadcnt uint32) (handle Handle, err error)
//sys	GetQueuedCompletionStatus(cphandle Handle, qty *uint32, key *uint32, overlapped **Overlapped, timeout uint32) (err error)
//sys	PostQueuedCompletionStatus(cphandle Handle, qty uint32, key uint32, overlapped *Overlapped) (err error)
//sys	CancelIo(s Handle) (err error)
//sys	CancelIoEx(s Handle, o *Overlapped) (err error)
//sys	CreateProcess(appName *uint16, commandLine *uint16, procSecurity *SecurityAttributes, threadSecurity *SecurityAttributes, inheritHandles bool, creationFlags uint32, env *uint16, currentDir *uint16, startupInfo *StartupInfo, outProcInfo *ProcessInformation) (err error) = CreateProcessW
//sys	OpenProcess(desiredAccess uint32, inheritHandle bool, processId uint32) (handle Handle, err error)
//sys	ShellExecute(hwnd Handle, verb *uint16, file *uint16, args *uint16, cwd *uint16, showCmd int32) (err error) [failretval<=32] = shell32.ShellExecuteW
//sys	shGetKnownFolderPath(id *KNOWNFOLDERID, flags uint32, token Token, path **uint16) (ret error) = shell32.SHGetKnownFolderPath
//sys	TerminateProcess(handle Handle, exitcode uint32) (err error)
//sys	GetExitCodeProcess(handle Handle, exitcode *uint32) (err error)
//sys	GetStartupInfo(startupInfo *StartupInfo) (err error) = GetStartupInfoW
//sys	GetProcessTimes(handle Handle, creationTime *Filetime, exitTime *Filetime, kernelTime *Filetime, userTime *Filetime) (err error)
//sys	DuplicateHandle(hSourceProcessHandle Handle, hSourceHandle Handle, hTargetProcessHandle Handle, lpTargetHandle *Handle, dwDesiredAccess uint32, bInheritHandle bool, dwOptions uint32) (err error)
//sys	WaitForSingleObject(handle Handle, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff]
//sys	waitForMultipleObjects(count uint32, handles uintptr, waitAll bool, waitMilliseconds uint32) (event uint32, err error) [failretval==0xffffffff] = WaitForMultipleObjects
//sys	GetTempPath(buflen uint32, buf *uint16) (n uint32, err error) = GetTempPathW
//sys	CreatePipe(readhandle *Handle, writehandle *Handle, sa *SecurityAttributes, size uint32) (err error)
//sys	GetFileType(filehandle Handle) (n uint32, err error)
//sys	CryptAcquireContext(provhandle *Handle, container *uint16, provider *uint16, provtype uint32, flags uint32) (err error) = advapi32.CryptAcquireContextW
//sys	CryptReleaseContext(provhandle Handle, flags uint32) (err error) = advapi32.CryptReleaseContext
//sys	CryptGenRandom(provhandle Handle, buflen uint32, buf *byte) (err error) = advapi32.CryptGenRandom
//sys	GetEnvironmentStrings() (envs *uint16, err error) [failretval==nil] = kernel32.GetEnvironmentStringsW
//sys	FreeEnvironmentStrings(envs *uint16) (err error) = kernel32.FreeEnvironmentStringsW
//sys	GetEnvironmentVariable(name *uint16, buffer *uint16, size uint32) (n uint32, err error) = kernel32.GetEnvironmentVariableW
//sys	SetEnvironmentVariable(name *uint16, value *uint16) (err error) = kernel32.SetEnvironmentVariableW
//sys	CreateEnvironmentBlock(block **uint16, token Token, inheritExisting bool) (err error) = userenv.CreateEnvironmentBlock
//sys	DestroyEnvironmentBlock(block *uint16) (err error) = userenv.DestroyEnvironmentBlock
//sys	getTickCount64() (ms uint64) = kernel32.GetTickCount64
//sys	SetFileTime(handle Handle, ctime *Filetime, atime *Filetime, wtime *Filetime) (err error)
//sys	GetFileAttributes(name *uint16) (attrs uint32, err error) [failretval==INVALID_FILE_ATTRIBUTES] = kernel32.GetFileAttributesW
//sys	SetFileAttributes(name *uint16, attrs uint32) (err error) = kernel32.SetFileAttributesW
//sys	GetFileAttributesEx(name *uint16, level uint32, info *byte) (err error) = kernel32.GetFileAttributesExW
//sys	GetCommandLine() (cmd *uint16) = kernel32.GetCommandLineW
//sys	CommandLineToArgv(cmd *uint16, argc *int32) (argv *[8192]*[8192]uint16, err error) [failretval==nil] = shell32.CommandLineToArgvW
//sys	LocalFree(hmem Handle) (handle Handle, err error) [failretval!=0]
//sys	SetHandleInformation(handle Handle, mask uint32, flags uint32) (err error)
//sys	FlushFileBuffers(handle Handle) (err error)
//sys	GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (n uint32, err error) = kernel32.GetFullPathNameW
//sys	GetLongPathName(path *uint16, buf *uint16, buflen uint32) (n uint32, err error) = kernel32.GetLongPathNameW
//sys	GetShortPathName(longpath *uint16, shortpath *uint16, buflen uint32) (n uint32, err error) = kernel32.GetShortPathNameW
//sys	GetFinalPathNameByHandle(file Handle, filePath *uint16, filePathSize uint32, flags uint32) (n uint32, err error) = kernel32.GetFinalPathNameByHandleW
//sys	CreateFileMapping(fhandle Handle, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle Handle, err error) = kernel32.CreateFileMappingW
//sys	MapViewOfFile(handle Handle, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, err error)
//sys	UnmapViewOfFile(addr uintptr) (err error)
//sys	FlushViewOfFile(addr uintptr, length uintptr) (err error)
//sys	VirtualLock(addr uintptr, length uintptr) (err error)
//sys	VirtualUnlock(addr uintptr, length uintptr) (err error)
//sys	VirtualAlloc(address uintptr, size uintptr, alloctype uint32, protect uint32) (value uintptr, err error) = kernel32.VirtualAlloc
//sys	VirtualFree(address uintptr, size uintptr, freetype uint32) (err error) = kernel32.VirtualFree
//sys	VirtualProtect(address uintptr, size uintptr, newprotect uint32, oldprotect *uint32) (err error) = kernel32.VirtualProtect
//sys	TransmitFile(s Handle, handle Handle, bytesToWrite uint32, bytsPerSend uint32, overlapped *Overlapped, transmitFileBuf *TransmitFileBuffers, flags uint32) (err error) = mswsock.TransmitFile
//sys	ReadDirectoryChanges(handle Handle, buf *byte, buflen uint32, watchSubTree bool, mask uint32, retlen *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) = kernel32.ReadDirectoryChangesW
//sys	CertOpenSystemStore(hprov Handle, name *uint16) (store Handle, err error) = crypt32.CertOpenSystemStoreW
//sys   CertOpenStore(storeProvider uintptr, msgAndCertEncodingType uint32, cryptProv uintptr, flags uint32, para uintptr) (handle Handle, err error) = crypt32.CertOpenStore
//sys	CertEnumCertificatesInStore(store Handle, prevContext *CertContext) (context *CertContext, err error) [failretval==nil] = crypt32.CertEnumCertificatesInStore
//sys   CertAddCertificateContextToStore(store Handle, certContext *CertContext, addDisposition uint32, storeContext **CertContext) (err error) = crypt32.CertAddCertificateContextToStore
//sys	CertCloseStore(store Handle, flags uint32) (err error) = crypt32.CertCloseStore
//sys	CertDeleteCertificateFromStore(certContext *CertContext) (err error) = crypt32.CertDeleteCertificateFromStore
//sys   CertGetCertificateChain(engine Handle, leaf *CertContext, time *Filetime, additionalStore Handle, para *CertChainPara, flags uint32, reserved uintptr, chainCtx **CertChainContext) (err error) = crypt32.CertGetCertificateChain
//sys   CertFreeCertificateChain(ctx *CertChainContext) = crypt32.CertFreeCertificateChain
//sys   CertCreateCertificateContext(certEncodingType uint32, certEncoded *byte, encodedLen uint32) (context *CertContext, err error) [failretval==nil] = crypt32.CertCreateCertificateContext
//sys   CertFreeCertificateContext(ctx *CertContext) (err error) = crypt32.CertFreeCertificateContext
//sys   CertVerifyCertificateChainPolicy(policyOID uintptr, chain *CertChainContext, para *CertChainPolicyPara, status *CertChainPolicyStatus) (err error) = crypt32.CertVerifyCertificateChainPolicy
//sys	RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW
//sys	RegCloseKey(key Handle) (regerrno error) = advapi32.RegCloseKey
//sys	RegQueryInfoKey(key Handle, class *uint16, classLen *uint32, reserved *uint32, subkeysLen *uint32, maxSubkeyLen *uint32, maxClassLen *uint32, valuesLen *uint32, maxValueNameLen *uint32, maxValueLen *uint32, saLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegQueryInfoKeyW
//sys	RegEnumKeyEx(key Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, class *uint16, classLen *uint32, lastWriteTime *Filetime) (regerrno error) = advapi32.RegEnumKeyExW
//sys	RegQueryValueEx(key Handle, name *uint16, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegQueryValueExW
//sys	GetCurrentProcessId() (pid uint32) = kernel32.GetCurrentProcessId
//sys	ProcessIdToSessionId(pid uint32, sessionid *uint32) (err error) = kernel32.ProcessIdToSessionId
//sys	GetConsoleMode(console Handle, mode *uint32) (err error) = kernel32.GetConsoleMode
//sys	SetConsoleMode(console Handle, mode uint32) (err error) = kernel32.SetConsoleMode
//sys	GetConsoleScreenBufferInfo(console Handle, info *ConsoleScreenBufferInfo) (err error) = kernel32.GetConsoleScreenBufferInfo
//sys	setConsoleCursorPosition(console Handle, position uint32) (err error) = kernel32.SetConsoleCursorPosition
//sys	WriteConsole(console Handle, buf *uint16, towrite uint32, written *uint32, reserved *byte) (err error) = kernel32.WriteConsoleW
//sys	ReadConsole(console Handle, buf *uint16, toread uint32, read *uint32, inputControl *byte) (err error) = kernel32.ReadConsoleW
//sys	CreateToolhelp32Snapshot(flags uint32, processId uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.CreateToolhelp32Snapshot
//sys	Process32First(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32FirstW
//sys	Process32Next(snapshot Handle, procEntry *ProcessEntry32) (err error) = kernel32.Process32NextW
//sys	Thread32First(snapshot Handle, threadEntry *ThreadEntry32) (err error)
//sys	Thread32Next(snapshot Handle, threadEntry *ThreadEntry32) (err error)
//sys	DeviceIoControl(handle Handle, ioControlCode uint32, inBuffer *byte, inBufferSize uint32, outBuffer *byte, outBufferSize uint32, bytesReturned *uint32, overlapped *Overlapped) (err error)
// This function returns 1 byte BOOLEAN rather than the 4 byte BOOL.
//sys	CreateSymbolicLink(symlinkfilename *uint16, targetfilename *uint16, flags uint32) (err error) [failretval&0xff==0] = CreateSymbolicLinkW
//sys	CreateHardLink(filename *uint16, existingfilename *uint16, reserved uintptr) (err error) [failretval&0xff==0] = CreateHardLinkW
//sys	GetCurrentThreadId() (id uint32)
//sys	CreateEvent(eventAttrs *SecurityAttributes, manualReset uint32, initialState uint32, name *uint16) (handle Handle, err error) = kernel32.CreateEventW
//sys	CreateEventEx(eventAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateEventExW
//sys	OpenEvent(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenEventW
//sys	SetEvent(event Handle) (err error) = kernel32.SetEvent
//sys	ResetEvent(event Handle) (err error) = kernel32.ResetEvent
//sys	PulseEvent(event Handle) (err error) = kernel32.PulseEvent
//sys	CreateMutex(mutexAttrs *SecurityAttributes, initialOwner bool, name *uint16) (handle Handle, err error) = kernel32.CreateMutexW
//sys	CreateMutexEx(mutexAttrs *SecurityAttributes, name *uint16, flags uint32, desiredAccess uint32) (handle Handle, err error) = kernel32.CreateMutexExW
//sys	OpenMutex(desiredAccess uint32, inheritHandle bool, name *uint16) (handle Handle, err error) = kernel32.OpenMutexW
//sys	ReleaseMutex(mutex Handle) (err error) = kernel32.ReleaseMutex
//sys	SleepEx(milliseconds uint32, alertable bool) (ret uint32) = kernel32.SleepEx
//sys	CreateJobObject(jobAttr *SecurityAttributes, name *uint16) (handle Handle, err error) = kernel32.CreateJobObjectW
//sys	AssignProcessToJobObject(job Handle, process Handle) (err error) = kernel32.AssignProcessToJobObject
//sys	TerminateJobObject(job Handle, exitCode uint32) (err error) = kernel32.TerminateJobObject
//sys	SetErrorMode(mode uint32) (ret uint32) = kernel32.SetErrorMode
//sys	ResumeThread(thread Handle) (ret uint32, err error) [failretval==0xffffffff] = kernel32.ResumeThread
//sys	SetPriorityClass(process Handle, priorityClass uint32) (err error) = kernel32.SetPriorityClass
//sys	GetPriorityClass(process Handle) (ret uint32, err error) = kernel32.GetPriorityClass
//sys	QueryInformationJobObject(job Handle, JobObjectInformationClass int32, JobObjectInformation uintptr, JobObjectInformationLength uint32, retlen *uint32) (err error) = kernel32.QueryInformationJobObject
//sys	SetInformationJobObject(job Handle, JobObjectInformationClass uint32, JobObjectInformation uintptr, JobObjectInformationLength uint32) (ret int, err error)
//sys	GenerateConsoleCtrlEvent(ctrlEvent uint32, processGroupID uint32) (err error)
//sys	GetProcessId(process Handle) (id uint32, err error)
//sys	OpenThread(desiredAccess uint32, inheritHandle bool, threadId uint32) (handle Handle, err error)
//sys	SetProcessPriorityBoost(process Handle, disable bool) (err error) = kernel32.SetProcessPriorityBoost
//sys	GetProcessWorkingSetSizeEx(hProcess Handle, lpMinimumWorkingSetSize *uintptr, lpMaximumWorkingSetSize *uintptr, flags *uint32)
//sys	SetProcessWorkingSetSizeEx(hProcess Handle, dwMinimumWorkingSetSize uintptr, dwMaximumWorkingSetSize uintptr, flags uint32) (err error)

// Volume Management Functions
//sys	DefineDosDevice(flags uint32, deviceName *uint16, targetPath *uint16) (err error) = DefineDosDeviceW
//sys	DeleteVolumeMountPoint(volumeMountPoint *uint16) (err error) = DeleteVolumeMountPointW
//sys	FindFirstVolume(volumeName *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeW
//sys	FindFirstVolumeMountPoint(rootPathName *uint16, volumeMountPoint *uint16, bufferLength uint32) (handle Handle, err error) [failretval==InvalidHandle] = FindFirstVolumeMountPointW
//sys	FindNextVolume(findVolume Handle, volumeName *uint16, bufferLength uint32) (err error) = FindNextVolumeW
//sys	FindNextVolumeMountPoint(findVolumeMountPoint Handle, volumeMountPoint *uint16, bufferLength uint32) (err error) = FindNextVolumeMountPointW
//sys	FindVolumeClose(findVolume Handle) (err error)
//sys	FindVolumeMountPointClose(findVolumeMountPoint Handle) (err error)
//sys	GetDiskFreeSpaceEx(directoryName *uint16, freeBytesAvailableToCaller *uint64, totalNumberOfBytes *uint64, totalNumberOfFreeBytes *uint64) (err error) = GetDiskFreeSpaceExW
//sys	GetDriveType(rootPathName *uint16) (driveType uint32) = GetDriveTypeW
//sys	GetLogicalDrives() (drivesBitMask uint32, err error) [failretval==0]
//sys	GetLogicalDriveStrings(bufferLength uint32, buffer *uint16) (n uint32, err error) [failretval==0] = GetLogicalDriveStringsW
//sys	GetVolumeInformation(rootPathName *uint16, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationW
//sys	GetVolumeInformationByHandle(file Handle, volumeNameBuffer *uint16, volumeNameSize uint32, volumeNameSerialNumber *uint32, maximumComponentLength *uint32, fileSystemFlags *uint32, fileSystemNameBuffer *uint16, fileSystemNameSize uint32) (err error) = GetVolumeInformationByHandleW
//sys	GetVolumeNameForVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16, bufferlength uint32) (err error) = GetVolumeNameForVolumeMountPointW
//sys	GetVolumePathName(fileName *uint16, volumePathName *uint16, bufferLength uint32) (err error) = GetVolumePathNameW
//sys	GetVolumePathNamesForVolumeName(volumeName *uint16, volumePathNames *uint16, bufferLength uint32, returnLength *uint32) (err error) = GetVolumePathNamesForVolumeNameW
//sys	QueryDosDevice(deviceName *uint16, targetPath *uint16, max uint32) (n uint32, err error) [failretval==0] = QueryDosDeviceW
//sys	SetVolumeLabel(rootPathName *uint16, volumeName *uint16) (err error) = SetVolumeLabelW
//sys	SetVolumeMountPoint(volumeMountPoint *uint16, volumeName *uint16) (err error) = SetVolumeMountPointW
//sys	MessageBox(hwnd Handle, text *uint16, caption *uint16, boxtype uint32) (ret int32, err error) [failretval==0] = user32.MessageBoxW
//sys	ExitWindowsEx(flags uint32, reason uint32) (err error) = user32.ExitWindowsEx
//sys	InitiateSystemShutdownEx(machineName *uint16, message *uint16, timeout uint32, forceAppsClosed bool, rebootAfterShutdown bool, reason uint32) (err error) = advapi32.InitiateSystemShutdownExW
//sys	SetProcessShutdownParameters(level uint32, flags uint32) (err error) = kernel32.SetProcessShutdownParameters
//sys	GetProcessShutdownParameters(level *uint32, flags *uint32) (err error) = kernel32.GetProcessShutdownParameters
//sys	clsidFromString(lpsz *uint16, pclsid *GUID) (ret error) = ole32.CLSIDFromString
//sys	stringFromGUID2(rguid *GUID, lpsz *uint16, cchMax int32) (chars int32) = ole32.StringFromGUID2
//sys	coCreateGuid(pguid *GUID) (ret error) = ole32.CoCreateGuid
//sys	CoTaskMemFree(address unsafe.Pointer) = ole32.CoTaskMemFree
//sys	rtlGetVersion(info *OsVersionInfoEx) (ret error) = ntdll.RtlGetVersion
//sys	rtlGetNtVersionNumbers(majorVersion *uint32, minorVersion *uint32, buildNumber *uint32) = ntdll.RtlGetNtVersionNumbers
//sys	getProcessPreferredUILanguages(flags uint32, numLanguages *uint32, buf *uint16, bufSize *uint32) (err error) = kernel32.GetProcessPreferredUILanguages
//sys	getThreadPreferredUILanguages(flags uint32, numLanguages *uint32, buf *uint16, bufSize *uint32) (err error) = kernel32.GetThreadPreferredUILanguages
//sys	getUserPreferredUILanguages(flags uint32, numLanguages *uint32, buf *uint16, bufSize *uint32) (err error) = kernel32.GetUserPreferredUILanguages
//sys	getSystemPreferredUILanguages(flags uint32, numLanguages *uint32, buf *uint16, bufSize *uint32) (err error) = kernel32.GetSystemPreferredUILanguages

// Process Status API (PSAPI)
//sys	EnumProcesses(processIds []uint32, bytesReturned *uint32) (err error) = psapi.EnumProcesses

// syscall interface implementation for other packages

// GetCurrentProcess returns the handle for the current process.
// It is a pseudo handle that does not need to be closed.
// The returned error is always nil.
//
// Deprecated: use CurrentProcess for the same Handle without the nil
// error.
func GetCurrentProcess() (Handle, error) {
	return CurrentProcess(), nil
}

// CurrentProcess returns the handle for the current process.
// It is a pseudo handle that does not need to be closed.
func CurrentProcess() Handle { return Handle(^uintptr(1 - 1)) }

// GetCurrentThread returns the handle for the current thread.
// It is a pseudo handle that does not need to be closed.
// The returned error is always nil.
//
// Deprecated: use CurrentThread for the same Handle without the nil
// error.
func GetCurrentThread() (Handle, error) {
	return CurrentThread(), nil
}

// CurrentThread returns the handle for the current thread.
// It is a pseudo handle that does not need to be closed.
func CurrentThread() Handle { return Handle(^uintptr(2 - 1)) }

// GetProcAddressByOrdinal retrieves the address of the exported
// function from module by ordinal.
func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) {
	r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), ordinal, 0)
	proc = uintptr(r0)
	if proc == 0 {
		err = errnoErr(e1)
	}
	return
}

func Exit(code int) { ExitProcess(uint32(code)) }

func makeInheritSa() *SecurityAttributes {
	var sa SecurityAttributes
	sa.Length = uint32(unsafe.Sizeof(sa))
	sa.InheritHandle = 1
	return &sa
}

func Open(path string, mode int, perm uint32) (fd Handle, err error) {
	if len(path) == 0 {
		return InvalidHandle, ERROR_FILE_NOT_FOUND
	}
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return InvalidHandle, err
	}
	var access uint32
	switch mode & (O_RDONLY | O_WRONLY | O_RDWR) {
	case O_RDONLY:
		access = GENERIC_READ
	case O_WRONLY:
		access = GENERIC_WRITE
	case O_RDWR:
		access = GENERIC_READ | GENERIC_WRITE
	}
	if mode&O_CREAT != 0 {
		access |= GENERIC_WRITE
	}
	if mode&O_APPEND != 0 {
		access &^= GENERIC_WRITE
		access |= FILE_APPEND_DATA
	}
	sharemode := uint32(FILE_SHARE_READ | FILE_SHARE_WRITE)
	var sa *SecurityAttributes
	if mode&O_CLOEXEC == 0 {
		sa = makeInheritSa()
	}
	var createmode uint32
	switch {
	case mode&(O_CREAT|O_EXCL) == (O_CREAT | O_EXCL):
		createmode = CREATE_NEW
	case mode&(O_CREAT|O_TRUNC) == (O_CREAT | O_TRUNC):
		createmode = CREATE_ALWAYS
	case mode&O_CREAT == O_CREAT:
		createmode = OPEN_ALWAYS
	case mode&O_TRUNC == O_TRUNC:
		createmode = TRUNCATE_EXISTING
	default:
		createmode = OPEN_EXISTING
	}
	var attrs uint32 = FILE_ATTRIBUTE_NORMAL
	if perm&S_IWRITE == 0 {
		attrs = FILE_ATTRIBUTE_READONLY
	}
	h, e := CreateFile(pathp, access, sharemode, sa, createmode, attrs, 0)
	return h, e
}

func Read(fd Handle, p []byte) (n int, err error) {
	var done uint32
	e := ReadFile(fd, p, &done, nil)
	if e != nil {
		if e == ERROR_BROKEN_PIPE {
			// NOTE(brainman): work around ERROR_BROKEN_PIPE is returned on reading EOF from stdin
			return 0, nil
		}
		return 0, e
	}
	if raceenabled {
		if done > 0 {
			raceWriteRange(unsafe.Pointer(&p[0]), int(done))
		}
		raceAcquire(unsafe.Pointer(&ioSync))
	}
	return int(done), nil
}

func Write(fd Handle, p []byte) (n int, err error) {
	if raceenabled {
		raceReleaseMerge(unsafe.Pointer(&ioSync))
	}
	var done uint32
	e := WriteFile(fd, p, &done, nil)
	if e != nil {
		return 0, e
	}
	if raceenabled && done > 0 {
		raceReadRange(unsafe.Pointer(&p[0]), int(done))
	}
	return int(done), nil
}

var ioSync int64

func Seek(fd Handle, offset int64, whence int) (newoffset int64, err error) {
	var w uint32
	switch whence {
	case 0:
		w = FILE_BEGIN
	case 1:
		w = FILE_CURRENT
	case 2:
		w = FILE_END
	}
	hi := int32(offset >> 32)
	lo := int32(offset)
	// use GetFileType to check pipe, pipe can't do seek
	ft, _ := GetFileType(fd)
	if ft == FILE_TYPE_PIPE {
		return 0, syscall.EPIPE
	}
	rlo, e := SetFilePointer(fd, lo, &hi, w)
	if e != nil {
		return 0, e
	}
	return int64(hi)<<32 + int64(rlo), nil
}

func Close(fd Handle) (err error) {
	return CloseHandle(fd)
}

var (
	Stdin  = getStdHandle(STD_INPUT_HANDLE)
	Stdout = getStdHandle(STD_OUTPUT_HANDLE)
	Stderr = getStdHandle(STD_ERROR_HANDLE)
)

func getStdHandle(stdhandle uint32) (fd Handle) {
	r, _ := GetStdHandle(stdhandle)
	CloseOnExec(r)
	return r
}

const ImplementsGetwd = true

func Getwd() (wd string, err error) {
	b := make([]uint16, 300)
	n, e := GetCurrentDirectory(uint32(len(b)), &b[0])
	if e != nil {
		return "", e
	}
	return string(utf16.Decode(b[0:n])), nil
}

func Chdir(path string) (err error) {
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return err
	}
	return SetCurrentDirectory(pathp)
}

func Mkdir(path string, mode uint32) (err error) {
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return err
	}
	return CreateDirectory(pathp, nil)
}

func Rmdir(path string) (err error) {
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return err
	}
	return RemoveDirectory(pathp)
}

func Unlink(path string) (err error) {
	pathp, err := UTF16PtrFromString(path)
	if err != nil {
		return err
	}
	return DeleteFile(pathp)
}

func Rename(oldpath, newpath string) (err error) {
	from, err := UTF16PtrFromString(oldpath)
	if err != nil {
		return err
	}
	to, err := UTF16PtrFromString(newpath)
	if err != nil {
		return err
	}
	return MoveFileEx(from, to, MOVEFILE_REPLACE_EXISTING)
}

func ComputerName() (name string, err error) {
	var n uint32 = MAX_COMPUTERNAME_LENGTH + 1
	b := make([]uint16, n)
	e := GetComputerName(&b[0], &n)
	if e != nil {
		return "", e
	}
	return string(utf16.Decode(b[0:n])), nil
}

func DurationSinceBoot() time.Duration {
	return time.Duration(getTickCount64()) * time.Millisecond
}

func Ftruncate(fd Handle, length int64) (err error) {
	curoffset, e := Seek(fd, 0, 1)
	if e != nil {
		return e
	}
	defer Seek(fd, curoffset, 0)
	_, e = Seek(fd, length, 0)
	if e != nil {
		return e
	}
	e = SetEndOfFile(fd)
	if e != nil {
		return e
	}
	return nil
}

func Gettimeofday(tv *Timeval) (err error) {
	var ft Filetime
	GetSystemTimeAsFileTime(&ft)
	*tv = NsecToTimeval(ft.Nanoseconds())
	return nil
}

func Pipe(p []Handle) (err error) {
	if len(p) != 2 {
		return syscall.EINVAL
	}
	var r, w Handle
	e := CreatePipe(&r, &w, makeInheritSa(), 0)
	if e != nil {
		return e
	}
	p[0] = r
	p[1] = w
	return nil
}

func Utimes(path string, tv []Timeval) (err error) {
	if len(tv) != 2 {
		return syscall.EINVAL
	}
	pathp, e := UTF16PtrFromString(path)
	if e != nil {
		return e
	}
	h, e := CreateFile(pathp,
		FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil,
		OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)
	if e != nil {
		return e
	}
	defer Close(h)
	a := NsecToFiletime(tv[0].Nanoseconds())
	w := NsecToFiletime(tv[1].Nanoseconds())
	return SetFileTime(h, nil, &a, &w)
}

func UtimesNano(path string, ts []Timespec) (err error) {
	if len(ts) != 2 {
		return syscall.EINVAL
	}
	pathp, e := UTF16PtrFromString(path)
	if e != nil {
		return e
	}
	h, e := CreateFile(pathp,
		FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE, nil,
		OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)
	if e != nil {
		return e
	}
	defer Close(h)
	a := NsecToFiletime(TimespecToNsec(ts[0]))
	w := NsecToFiletime(TimespecToNsec(ts[1]))
	return SetFileTime(h, nil, &a, &w)
}

func Fsync(fd Handle) (err error) {
	return FlushFileBuffers(fd)
}

func Chmod(path string, mode uint32) (err error) {
	p, e := UTF16PtrFromString(path)
	if e != nil {
		return e
	}
	attrs, e := GetFileAttributes(p)
	if e != nil {
		return e
	}
	if mode&S_IWRITE != 0 {
		attrs &^= FILE_ATTRIBUTE_READONLY
	} else {
		attrs |= FILE_ATTRIBUTE_READONLY
	}
	return SetFileAttributes(p, attrs)
}

func LoadGetSystemTimePreciseAsFileTime() error {
	return procGetSystemTimePreciseAsFileTime.Find()
}

func LoadCancelIoEx() error {
	return procCancelIoEx.Find()
}

func LoadSetFileCompletionNotificationModes() error {
	return procSetFileCompletionNotificationModes.Find()
}

func WaitForMultipleObjects(handles []Handle, waitAll bool, waitMilliseconds uint32) (event uint32, err error) {
	// Every other win32 array API takes arguments as "pointer, count", except for this function. So we
	// can't declare it as a usual [] type, because mksyscall will use the opposite order. We therefore
	// trivially stub this ourselves.

	var handlePtr *Handle
	if len(handles) > 0 {
		handlePtr = &handles[0]
	}
	return waitForMultipleObjects(uint32(len(handles)), uintptr(unsafe.Pointer(handlePtr)), waitAll, waitMilliseconds)
}

// net api calls

const socket_error = uintptr(^uint32(0))

//sys	WSAStartup(verreq uint32, data *WSAData) (sockerr error) = ws2_32.WSAStartup
//sys	WSACleanup() (err error) [failretval==socket_error] = ws2_32.WSACleanup
//sys	WSAIoctl(s Handle, iocc uint32, inbuf *byte, cbif uint32, outbuf *byte, cbob uint32, cbbr *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) [failretval==socket_error] = ws2_32.WSAIoctl
//sys	socket(af int32, typ int32, protocol int32) (handle Handle, err error) [failretval==InvalidHandle] = ws2_32.socket
//sys	sendto(s Handle, buf []byte, flags int32, to unsafe.Pointer, tolen int32) (err error) [failretval==socket_error] = ws2_32.sendto
//sys	recvfrom(s Handle, buf []byte, flags int32, from *RawSockaddrAny, fromlen *int32) (n int32, err error) [failretval==-1] = ws2_32.recvfrom
//sys	Setsockopt(s Handle, level int32, optname int32, optval *byte, optlen int32) (err error) [failretval==socket_error] = ws2_32.setsockopt
//sys	Getsockopt(s Handle, level int32, optname int32, optval *byte, optlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockopt
//sys	bind(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.bind
//sys	connect(s Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socket_error] = ws2_32.connect
//sys	getsockname(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getsockname
//sys	getpeername(s Handle, rsa *RawSockaddrAny, addrlen *int32) (err error) [failretval==socket_error] = ws2_32.getpeername
//sys	listen(s Handle, backlog int32) (err error) [failretval==socket_error] = ws2_32.listen
//sys	shutdown(s Handle, how int32) (err error) [failretval==socket_error] = ws2_32.shutdown
//sys	Closesocket(s Handle) (err error) [failretval==socket_error] = ws2_32.closesocket
//sys	AcceptEx(ls Handle, as Handle, buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, recvd *uint32, overlapped *Overlapped) (err error) = mswsock.AcceptEx
//sys	GetAcceptExSockaddrs(buf *byte, rxdatalen uint32, laddrlen uint32, raddrlen uint32, lrsa **RawSockaddrAny, lrsalen *int32, rrsa **RawSockaddrAny, rrsalen *int32) = mswsock.GetAcceptExSockaddrs
//sys	WSARecv(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecv
//sys	WSASend(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASend
//sys	WSARecvFrom(s Handle, bufs *WSABuf, bufcnt uint32, recvd *uint32, flags *uint32,  from *RawSockaddrAny, fromlen *int32, overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSARecvFrom
//sys	WSASendTo(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *RawSockaddrAny, tolen int32,  overlapped *Overlapped, croutine *byte) (err error) [failretval==socket_error] = ws2_32.WSASendTo
//sys	GetHostByName(name string) (h *Hostent, err error) [failretval==nil] = ws2_32.gethostbyname
//sys	GetServByName(name string, proto string) (s *Servent, err error) [failretval==nil] = ws2_32.getservbyname
//sys	Ntohs(netshort uint16) (u uint16) = ws2_32.ntohs
//sys	GetProtoByName(name string) (p *Protoent, err error) [failretval==nil] = ws2_32.getprotobyname
//sys	DnsQuery(name string, qtype uint16, options uint32, extra *byte, qrs **DNSRecord, pr *byte) (status error) = dnsapi.DnsQuery_W
//sys	DnsRecordListFree(rl *DNSRecord, freetype uint32) = dnsapi.DnsRecordListFree
//sys	DnsNameCompare(name1 *uint16, name2 *uint16) (same bool) = dnsapi.DnsNameCompare_W
//sys	GetAddrInfoW(nodename *uint16, servicename *uint16, hints *AddrinfoW, result **AddrinfoW) (sockerr error) = ws2_32.GetAddrInfoW
//sys	FreeAddrInfoW(addrinfo *AddrinfoW) = ws2_32.FreeAddrInfoW
//sys	GetIfEntry(pIfRow *MibIfRow) (errcode error) = iphlpapi.GetIfEntry
//sys	GetAdaptersInfo(ai *IpAdapterInfo, ol *uint32) (errcode error) = iphlpapi.GetAdaptersInfo
//sys	SetFileCompletionNotificationModes(handle Handle, flags uint8) (err error) = kernel32.SetFileCompletionNotificationModes
//sys	WSAEnumProtocols(protocols *int32, protocolBuffer *WSAProtocolInfo, bufferLength *uint32) (n int32, err error) [failretval==-1] = ws2_32.WSAEnumProtocolsW
//sys	GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses
//sys	GetACP() (acp uint32) = kernel32.GetACP
//sys	MultiByteToWideChar(codePage uint32, dwFlags uint32, str *byte, nstr int32, wchar *uint16, nwchar int32) (nwrite int32, err error) = kernel32.MultiByteToWideChar

// For testing: clients can set this flag to force
// creation of IPv6 sockets to return EAFNOSUPPORT.
var SocketDisableIPv6 bool

type RawSockaddrInet4 struct {
	Family uint16
	Port   uint16
	Addr   [4]byte /* in_addr */
	Zero   [8]uint8
}

type RawSockaddrInet6 struct {
	Family   uint16
	Port     uint16
	Flowinfo uint32
	Addr     [16]byte /* in6_addr */
	Scope_id uint32
}

type RawSockaddr struct {
	Family uint16
	Data   [14]int8
}

type RawSockaddrAny struct {
	Addr RawSockaddr
	Pad  [100]int8
}

type Sockaddr interface {
	sockaddr() (ptr unsafe.Pointer, len int32, err error) // lowercase; only we can define Sockaddrs
}

type SockaddrInet4 struct {
	Port int
	Addr [4]byte
	raw  RawSockaddrInet4
}

func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, int32, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, syscall.EINVAL
	}
	sa.raw.Family = AF_INET
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	for i := 0; i < len(sa.Addr); i++ {
		sa.raw.Addr[i] = sa.Addr[i]
	}
	return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil
}

type SockaddrInet6 struct {
	Port   int
	ZoneId uint32
	Addr   [16]byte
	raw    RawSockaddrInet6
}

func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, int32, error) {
	if sa.Port < 0 || sa.Port > 0xFFFF {
		return nil, 0, syscall.EINVAL
	}
	sa.raw.Family = AF_INET6
	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
	p[0] = byte(sa.Port >> 8)
	p[1] = byte(sa.Port)
	sa.raw.Scope_id = sa.ZoneId
	for i := 0; i < len(sa.Addr); i++ {
		sa.raw.Addr[i] = sa.Addr[i]
	}
	return unsafe.Pointer(&sa.raw), int32(unsafe.Sizeof(sa.raw)), nil
}

type RawSockaddrUnix struct {
	Family uint16
	Path   [UNIX_PATH_MAX]int8
}

type SockaddrUnix struct {
	Name string
	raw  RawSockaddrUnix
}

func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, int32, error) {
	name := sa.Name
	n := len(name)
	if n > len(sa.raw.Path) {
		return nil, 0, syscall.EINVAL
	}
	if n == len(sa.raw.Path) && name[0] != '@' {
		return nil, 0, syscall.EINVAL
	}
	sa.raw.Family = AF_UNIX
	for i := 0; i < n; i++ {
		sa.raw.Path[i] = int8(name[i])
	}
	// length is family (uint16), name, NUL.
	sl := int32(2)
	if n > 0 {
		sl += int32(n) + 1
	}
	if sa.raw.Path[0] == '@' {
		sa.raw.Path[0] = 0
		// Don't count trailing NUL for abstract address.
		sl--
	}

	return unsafe.Pointer(&sa.raw), sl, nil
}

func (rsa *RawSockaddrAny) Sockaddr() (Sockaddr, error) {
	switch rsa.Addr.Family {
	case AF_UNIX:
		pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa))
		sa := new(SockaddrUnix)
		if pp.Path[0] == 0 {
			// "Abstract" Unix domain socket.
			// Rewrite leading NUL as @ for textual display.
			// (This is the standard convention.)
			// Not friendly to overwrite in place,
			// but the callers below don't care.
			pp.Path[0] = '@'
		}

		// Assume path ends at NUL.
		// This is not technically the Linux semantics for
		// abstract Unix domain sockets--they are supposed
		// to be uninterpreted fixed-size binary blobs--but
		// everyone uses this convention.
		n := 0
		for n < len(pp.Path) && pp.Path[n] != 0 {
			n++
		}
		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
		sa.Name = string(bytes)
		return sa, nil

	case AF_INET:
		pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa))
		sa := new(SockaddrInet4)
		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
		sa.Port = int(p[0])<<8 + int(p[1])
		for i := 0; i < len(sa.Addr); i++ {
			sa.Addr[i] = pp.Addr[i]
		}
		return sa, nil

	case AF_INET6:
		pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa))
		sa := new(SockaddrInet6)
		p := (*[2]byte)(unsafe.Pointer(&pp.Port))
		sa.Port = int(p[0])<<8 + int(p[1])
		sa.ZoneId = pp.Scope_id
		for i := 0; i < len(sa.Addr); i++ {
			sa.Addr[i] = pp.Addr[i]
		}
		return sa, nil
	}
	return nil, syscall.EAFNOSUPPORT
}

func Socket(domain, typ, proto int) (fd Handle, err error) {
	if domain == AF_INET6 && SocketDisableIPv6 {
		return InvalidHandle, syscall.EAFNOSUPPORT
	}
	return socket(int32(domain), int32(typ), int32(proto))
}

func SetsockoptInt(fd Handle, level, opt int, value int) (err error) {
	v := int32(value)
	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), int32(unsafe.Sizeof(v)))
}

func Bind(fd Handle, sa Sockaddr) (err error) {
	ptr, n, err := sa.sockaddr()
	if err != nil {
		return err
	}
	return bind(fd, ptr, n)
}

func Connect(fd Handle, sa Sockaddr) (err error) {
	ptr, n, err := sa.sockaddr()
	if err != nil {
		return err
	}
	return connect(fd, ptr, n)
}

func Getsockname(fd Handle) (sa Sockaddr, err error) {
	var rsa RawSockaddrAny
	l := int32(unsafe.Sizeof(rsa))
	if err = getsockname(fd, &rsa, &l); err != nil {
		return
	}
	return rsa.Sockaddr()
}

func Getpeername(fd Handle) (sa Sockaddr, err error) {
	var rsa RawSockaddrAny
	l := int32(unsafe.Sizeof(rsa))
	if err = getpeername(fd, &rsa, &l); err != nil {
		return
	}
	return rsa.Sockaddr()
}

func Listen(s Handle, n int) (err error) {
	return listen(s, int32(n))
}

func Shutdown(fd Handle, how int) (err error) {
	return shutdown(fd, int32(how))
}

func WSASendto(s Handle, bufs *WSABuf, bufcnt uint32, sent *uint32, flags uint32, to Sockaddr, overlapped *Overlapped, croutine *byte) (err error) {
	rsa, l, err := to.sockaddr()
	if err != nil {
		return err
	}
	return WSASendTo(s, bufs, bufcnt, sent, flags, (*RawSockaddrAny)(unsafe.Pointer(rsa)), l, overlapped, croutine)
}

func LoadGetAddrInfo() error {
	return procGetAddrInfoW.Find()
}

var connectExFunc struct {
	once sync.Once
	addr uintptr
	err  error
}

func LoadConnectEx() error {
	connectExFunc.once.Do(func() {
		var s Handle
		s, connectExFunc.err = Socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)
		if connectExFunc.err != nil {
			return
		}
		defer CloseHandle(s)
		var n uint32
		connectExFunc.err = WSAIoctl(s,
			SIO_GET_EXTENSION_FUNCTION_POINTER,
			(*byte)(unsafe.Pointer(&WSAID_CONNECTEX)),
			uint32(unsafe.Sizeof(WSAID_CONNECTEX)),
			(*byte)(unsafe.Pointer(&connectExFunc.addr)),
			uint32(unsafe.Sizeof(connectExFunc.addr)),
			&n, nil, 0)
	})
	return connectExFunc.err
}

func connectEx(s Handle, name unsafe.Pointer, namelen int32, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) (err error) {
	r1, _, e1 := syscall.Syscall9(connectExFunc.addr, 7, uintptr(s), uintptr(name), uintptr(namelen), uintptr(unsafe.Pointer(sendBuf)), uintptr(sendDataLen), uintptr(unsafe.Pointer(bytesSent)), uintptr(unsafe.Pointer(overlapped)), 0, 0)
	if r1 == 0 {
		if e1 != 0 {
			err = error(e1)
		} else {
			err = syscall.EINVAL
		}
	}
	return
}

func ConnectEx(fd Handle, sa Sockaddr, sendBuf *byte, sendDataLen uint32, bytesSent *uint32, overlapped *Overlapped) error {
	err := LoadConnectEx()
	if err != nil {
		return errorspkg.New("failed to find ConnectEx: " + err.Error())
	}
	ptr, n, err := sa.sockaddr()
	if err != nil {
		return err
	}
	return connectEx(fd, ptr, n, sendBuf, sendDataLen, bytesSent, overlapped)
}

var sendRecvMsgFunc struct {
	once     sync.Once
	sendAddr uintptr
	recvAddr uintptr
	err      error
}

func loadWSASendRecvMsg() error {
	sendRecvMsgFunc.once.Do(func() {
		var s Handle
		s, sendRecvMsgFunc.err = Socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)
		if sendRecvMsgFunc.err != nil {
			return
		}
		defer CloseHandle(s)
		var n uint32
		sendRecvMsgFunc.err = WSAIoctl(s,
			SIO_GET_EXTENSION_FUNCTION_POINTER,
			(*byte)(unsafe.Pointer(&WSAID_WSARECVMSG)),
			uint32(unsafe.Sizeof(WSAID_WSARECVMSG)),
			(*byte)(unsafe.Pointer(&sendRecvMsgFunc.recvAddr)),
			uint32(unsafe.Sizeof(sendRecvMsgFunc.recvAddr)),
			&n, nil, 0)
		if sendRecvMsgFunc.err != nil {
			return
		}
		sendRecvMsgFunc.err = WSAIoctl(s,
			SIO_GET_EXTENSION_FUNCTION_POINTER,
			(*byte)(unsafe.Pointer(&WSAID_WSASENDMSG)),
			uint32(unsafe.Sizeof(WSAID_WSASENDMSG)),
			(*byte)(unsafe.Pointer(&sendRecvMsgFunc.sendAddr)),
			uint32(unsafe.Sizeof(sendRecvMsgFunc.sendAddr)),
			&n, nil, 0)
	})
	return sendRecvMsgFunc.err
}

func WSASendMsg(fd Handle, msg *WSAMsg, flags uint32, bytesSent *uint32, overlapped *Overlapped, croutine *byte) error {
	err := loadWSASendRecvMsg()
	if err != nil {
		return err
	}
	r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.sendAddr, 6, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(flags), uintptr(unsafe.Pointer(bytesSent)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)))
	if r1 == socket_error {
		err = errnoErr(e1)
	}
	return err
}

func WSARecvMsg(fd Handle, msg *WSAMsg, bytesReceived *uint32, overlapped *Overlapped, croutine *byte) error {
	err := loadWSASendRecvMsg()
	if err != nil {
		return err
	}
	r1, _, e1 := syscall.Syscall6(sendRecvMsgFunc.recvAddr, 5, uintptr(fd), uintptr(unsafe.Pointer(msg)), uintptr(unsafe.Pointer(bytesReceived)), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(croutine)), 0)
	if r1 == socket_error {
		err = errnoErr(e1)
	}
	return err
}

// Invented structures to support what package os expects.
type Rusage struct {
	CreationTime Filetime
	ExitTime     Filetime
	KernelTime   Filetime
	UserTime     Filetime
}

type WaitStatus struct {
	ExitCode uint32
}

func (w WaitStatus) Exited() bool { return true }

func (w WaitStatus) ExitStatus() int { return int(w.ExitCode) }

func (w WaitStatus) Signal() Signal { return -1 }

func (w WaitStatus) CoreDump() bool { return false }

func (w WaitStatus) Stopped() bool { return false }

func (w WaitStatus) Continued() bool { return false }

func (w WaitStatus) StopSignal() Signal { return -1 }

func (w WaitStatus) Signaled() bool { return false }

func (w WaitStatus) TrapCause() int { return -1 }

// Timespec is an invented structure on Windows, but here for
// consistency with the corresponding package for other operating systems.
type Timespec struct {
	Sec  int64
	Nsec int64
}

func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }

func NsecToTimespec(nsec int64) (ts Timespec) {
	ts.Sec = nsec / 1e9
	ts.Nsec = nsec % 1e9
	return
}

// TODO(brainman): fix all needed for net

func Accept(fd Handle) (nfd Handle, sa Sockaddr, err error) { return 0, nil, syscall.EWINDOWS }

func Recvfrom(fd Handle, p []byte, flags int) (n int, from Sockaddr, err error) {
	var rsa RawSockaddrAny
	l := int32(unsafe.Sizeof(rsa))
	n32, err := recvfrom(fd, p, int32(flags), &rsa, &l)
	n = int(n32)
	if err != nil {
		return
	}
	from, err = rsa.Sockaddr()
	return
}

func Sendto(fd Handle, p []byte, flags int, to Sockaddr) (err error) {
	ptr, l, err := to.sockaddr()
	if err != nil {
		return err
	}
	return sendto(fd, p, int32(flags), ptr, l)
}

func SetsockoptTimeval(fd Handle, level, opt int, tv *Timeval) (err error) { return syscall.EWINDOWS }

// The Linger struct is wrong but we only noticed after Go 1.
// sysLinger is the real system call structure.

// BUG(brainman): The definition of Linger is not appropriate for direct use
// with Setsockopt and Getsockopt.
// Use SetsockoptLinger instead.

type Linger struct {
	Onoff  int32
	Linger int32
}

type sysLinger struct {
	Onoff  uint16
	Linger uint16
}

type IPMreq struct {
	Multiaddr [4]byte /* in_addr */
	Interface [4]byte /* in_addr */
}

type IPv6Mreq struct {
	Multiaddr [16]byte /* in6_addr */
	Interface uint32
}

func GetsockoptInt(fd Handle, level, opt int) (int, error) {
	v := int32(0)
	l := int32(unsafe.Sizeof(v))
	err := Getsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&v)), &l)
	return int(v), err
}

func SetsockoptLinger(fd Handle, level, opt int, l *Linger) (err error) {
	sys := sysLinger{Onoff: uint16(l.Onoff), Linger: uint16(l.Linger)}
	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&sys)), int32(unsafe.Sizeof(sys)))
}

func SetsockoptInet4Addr(fd Handle, level, opt int, value [4]byte) (err error) {
	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(&value[0])), 4)
}
func SetsockoptIPMreq(fd Handle, level, opt int, mreq *IPMreq) (err error) {
	return Setsockopt(fd, int32(level), int32(opt), (*byte)(unsafe.Pointer(mreq)), int32(unsafe.Sizeof(*mreq)))
}
func SetsockoptIPv6Mreq(fd Handle, level, opt int, mreq *IPv6Mreq) (err error) {
	return syscall.EWINDOWS
}

func Getpid() (pid int) { return int(GetCurrentProcessId()) }

func FindFirstFile(name *uint16, data *Win32finddata) (handle Handle, err error) {
	// NOTE(rsc): The Win32finddata struct is wrong for the system call:
	// the two paths are each one uint16 short. Use the correct struct,
	// a win32finddata1, and then copy the results out.
	// There is no loss of expressivity here, because the final
	// uint16, if it is used, is supposed to be a NUL, and Go doesn't need that.
	// For Go 1.1, we might avoid the allocation of win32finddata1 here
	// by adding a final Bug [2]uint16 field to the struct and then
	// adjusting the fields in the result directly.
	var data1 win32finddata1
	handle, err = findFirstFile1(name, &data1)
	if err == nil {
		copyFindData(data, &data1)
	}
	return
}

func FindNextFile(handle Handle, data *Win32finddata) (err error) {
	var data1 win32finddata1
	err = findNextFile1(handle, &data1)
	if err == nil {
		copyFindData(data, &data1)
	}
	return
}

func getProcessEntry(pid int) (*ProcessEntry32, error) {
	snapshot, err := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)
	if err != nil {
		return nil, err
	}
	defer CloseHandle(snapshot)
	var procEntry ProcessEntry32
	procEntry.Size = uint32(unsafe.Sizeof(procEntry))
	if err = Process32First(snapshot, &procEntry); err != nil {
		return nil, err
	}
	for {
		if procEntry.ProcessID == uint32(pid) {
			return &procEntry, nil
		}
		err = Process32Next(snapshot, &procEntry)
		if err != nil {
			return nil, err
		}
	}
}

func Getppid() (ppid int) {
	pe, err := getProcessEntry(Getpid())
	if err != nil {
		return -1
	}
	return int(pe.ParentProcessID)
}

// TODO(brainman): fix all needed for os
func Fchdir(fd Handle) (err error)             { return syscall.EWINDOWS }
func Link(oldpath, newpath string) (err error) { return syscall.EWINDOWS }
func Symlink(path, link string) (err error)    { return syscall.EWINDOWS }

func Fchmod(fd Handle, mode uint32) (err error)        { return syscall.EWINDOWS }
func Chown(path string, uid int, gid int) (err error)  { return syscall.EWINDOWS }
func Lchown(path string, uid int, gid int) (err error) { return syscall.EWINDOWS }
func Fchown(fd Handle, uid int, gid int) (err error)   { return syscall.EWINDOWS }

func Getuid() (uid int)                  { return -1 }
func Geteuid() (euid int)                { return -1 }
func Getgid() (gid int)                  { return -1 }
func Getegid() (egid int)                { return -1 }
func Getgroups() (gids []int, err error) { return nil, syscall.EWINDOWS }

type Signal int

func (s Signal) Signal() {}

func (s Signal) String() string {
	if 0 <= s && int(s) < len(signals) {
		str := signals[s]
		if str != "" {
			return str
		}
	}
	return "signal " + itoa(int(s))
}

func LoadCreateSymbolicLink() error {
	return procCreateSymbolicLinkW.Find()
}

// Readlink returns the destination of the named symbolic link.
func Readlink(path string, buf []byte) (n int, err error) {
	fd, err := CreateFile(StringToUTF16Ptr(path), GENERIC_READ, 0, nil, OPEN_EXISTING,
		FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, 0)
	if err != nil {
		return -1, err
	}
	defer CloseHandle(fd)

	rdbbuf := make([]byte, MAXIMUM_REPARSE_DATA_BUFFER_SIZE)
	var bytesReturned uint32
	err = DeviceIoControl(fd, FSCTL_GET_REPARSE_POINT, nil, 0, &rdbbuf[0], uint32(len(rdbbuf)), &bytesReturned, nil)
	if err != nil {
		return -1, err
	}

	rdb := (*reparseDataBuffer)(unsafe.Pointer(&rdbbuf[0]))
	var s string
	switch rdb.ReparseTag {
	case IO_REPARSE_TAG_SYMLINK:
		data := (*symbolicLinkReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
		p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
		s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2])
	case IO_REPARSE_TAG_MOUNT_POINT:
		data := (*mountPointReparseBuffer)(unsafe.Pointer(&rdb.reparseBuffer))
		p := (*[0xffff]uint16)(unsafe.Pointer(&data.PathBuffer[0]))
		s = UTF16ToString(p[data.PrintNameOffset/2 : (data.PrintNameLength-data.PrintNameOffset)/2])
	default:
		// the path is not a symlink or junction but another type of reparse
		// point
		return -1, syscall.ENOENT
	}
	n = copy(buf, []byte(s))

	return n, nil
}

// GUIDFromString parses a string in the form of
// "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}" into a GUID.
func GUIDFromString(str string) (GUID, error) {
	guid := GUID{}
	str16, err := syscall.UTF16PtrFromString(str)
	if err != nil {
		return guid, err
	}
	err = clsidFromString(str16, &guid)
	if err != nil {
		return guid, err
	}
	return guid, nil
}

// GenerateGUID creates a new random GUID.
func GenerateGUID() (GUID, error) {
	guid := GUID{}
	err := coCreateGuid(&guid)
	if err != nil {
		return guid, err
	}
	return guid, nil
}

// String returns the canonical string form of the GUID,
// in the form of "{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}".
func (guid GUID) String() string {
	var str [100]uint16
	chars := stringFromGUID2(&guid, &str[0], int32(len(str)))
	if chars <= 1 {
		return ""
	}
	return string(utf16.Decode(str[:chars-1]))
}

// KnownFolderPath returns a well-known folder path for the current user, specified by one of
// the FOLDERID_ constants, and chosen and optionally created based on a KF_ flag.
func KnownFolderPath(folderID *KNOWNFOLDERID, flags uint32) (string, error) {
	return Token(0).KnownFolderPath(folderID, flags)
}

// KnownFolderPath returns a well-known folder path for the user token, specified by one of
// the FOLDERID_ constants, and chosen and optionally created based on a KF_ flag.
func (t Token) KnownFolderPath(folderID *KNOWNFOLDERID, flags uint32) (string, error) {
	var p *uint16
	err := shGetKnownFolderPath(folderID, flags, t, &p)
	if err != nil {
		return "", err
	}
	defer CoTaskMemFree(unsafe.Pointer(p))
	return UTF16PtrToString(p), nil
}

// RtlGetVersion returns the version of the underlying operating system, ignoring
// manifest semantics but is affected by the application compatibility layer.
func RtlGetVersion() *OsVersionInfoEx {
	info := &OsVersionInfoEx{}
	info.osVersionInfoSize = uint32(unsafe.Sizeof(*info))
	// According to documentation, this function always succeeds.
	// The function doesn't even check the validity of the
	// osVersionInfoSize member. Disassembling ntdll.dll indicates
	// that the documentation is indeed correct about that.
	_ = rtlGetVersion(info)
	return info
}

// RtlGetNtVersionNumbers returns the version of the underlying operating system,
// ignoring manifest semantics and the application compatibility layer.
func RtlGetNtVersionNumbers() (majorVersion, minorVersion, buildNumber uint32) {
	rtlGetNtVersionNumbers(&majorVersion, &minorVersion, &buildNumber)
	buildNumber &= 0xffff
	return
}

// GetProcessPreferredUILanguages retrieves the process preferred UI languages.
func GetProcessPreferredUILanguages(flags uint32) ([]string, error) {
	return getUILanguages(flags, getProcessPreferredUILanguages)
}

// GetThreadPreferredUILanguages retrieves the thread preferred UI languages for the current thread.
func GetThreadPreferredUILanguages(flags uint32) ([]string, error) {
	return getUILanguages(flags, getThreadPreferredUILanguages)
}

// GetUserPreferredUILanguages retrieves information about the user preferred UI languages.
func GetUserPreferredUILanguages(flags uint32) ([]string, error) {
	return getUILanguages(flags, getUserPreferredUILanguages)
}

// GetSystemPreferredUILanguages retrieves the system preferred UI languages.
func GetSystemPreferredUILanguages(flags uint32) ([]string, error) {
	return getUILanguages(flags, getSystemPreferredUILanguages)
}

func getUILanguages(flags uint32, f func(flags uint32, numLanguages *uint32, buf *uint16, bufSize *uint32) error) ([]string, error) {
	size := uint32(128)
	for {
		var numLanguages uint32
		buf := make([]uint16, size)
		err := f(flags, &numLanguages, &buf[0], &size)
		if err == ERROR_INSUFFICIENT_BUFFER {
			continue
		}
		if err != nil {
			return nil, err
		}
		buf = buf[:size]
		if numLanguages == 0 || len(buf) == 0 { // GetProcessPreferredUILanguages may return numLanguages==0 with "\0\0"
			return []string{}, nil
		}
		if buf[len(buf)-1] == 0 {
			buf = buf[:len(buf)-1] // remove terminating null
		}
		languages := make([]string, 0, numLanguages)
		from := 0
		for i, c := range buf {
			if c == 0 {
				languages = append(languages, string(utf16.Decode(buf[from:i])))
				from = i + 1
			}
		}
		return languages, nil
	}
}

func SetConsoleCursorPosition(console Handle, position Coord) error {
	return setConsoleCursorPosition(console, *((*uint32)(unsafe.Pointer(&position))))
}