summaryrefslogtreecommitdiff
path: root/erts/emulator/beam/sys.h
blob: fca4e02ab16f0e675ea3f91419fbdfc92345592b (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
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 1996-2022. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * %CopyrightEnd%
 */

#ifndef __SYS_H__
#define __SYS_H__

#define ERTS_SUPPORT_OLD_RECV_MARK_INSTRS

#if !defined(__GNUC__) || defined(__e2k__)
#  define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) 0
#elif !defined(__GNUC_MINOR__)
#  define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
  ((__GNUC__ << 24) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
#elif !defined(__GNUC_PATCHLEVEL__)
#  define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
  (((__GNUC__ << 24) | (__GNUC_MINOR__ << 12)) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
#else
#  define ERTS_AT_LEAST_GCC_VSN__(MAJ, MIN, PL) \
  (((__GNUC__ << 24) | (__GNUC_MINOR__ << 12) | __GNUC_PATCHLEVEL__) >= (((MAJ) << 24) | ((MIN) << 12) | (PL)))
#endif


#ifdef ERTS_INLINE
#  ifndef ERTS_CAN_INLINE
#    define ERTS_CAN_INLINE 1
#  endif
#else
#  if defined(__GNUC__)
#    define ERTS_CAN_INLINE 1
#    define ERTS_INLINE __inline__
#  elif defined(__WIN32__)
#    define ERTS_CAN_INLINE 1
#    define ERTS_INLINE __inline
#  else
#    define ERTS_CAN_INLINE 0
#    define ERTS_INLINE
#  endif
#endif

#ifndef ERTS_FORCE_INLINE
#  if ERTS_AT_LEAST_GCC_VSN__(3,1,1)
#    define ERTS_FORCE_INLINE __inline__ __attribute__((__always_inline__))
#  elif defined(__WIN32__)
#    define ERTS_FORCE_INLINE __forceinline
#  endif
#  ifndef ERTS_FORCE_INLINE
#    define ERTS_FORCE_INLINE ERTS_INLINE
#  endif
#endif

#ifndef ERTS_NOINLINE
#  if ERTS_AT_LEAST_GCC_VSN__(3,1,1)
#    define ERTS_NOINLINE __attribute__((__noinline__))
#  else
#    define ERTS_NOINLINE
#  endif
#endif

#if defined(DEBUG) || defined(ERTS_ENABLE_LOCK_CHECK)
#  undef ERTS_CAN_INLINE
#  define ERTS_CAN_INLINE 0
#  undef ERTS_INLINE
#  define ERTS_INLINE
#endif

#if ERTS_CAN_INLINE
#define ERTS_GLB_FORCE_INLINE static ERTS_FORCE_INLINE
#define ERTS_GLB_INLINE static ERTS_INLINE
#else
#define ERTS_GLB_FORCE_INLINE
#define ERTS_GLB_INLINE
#endif

#if (ERTS_CAN_INLINE || defined(ERTS_DO_INCL_GLB_INLINE_FUNC_DEF))
#  define ERTS_GLB_INLINE_INCL_FUNC_DEF 1
#else
#  define ERTS_GLB_INLINE_INCL_FUNC_DEF 0
#endif

#ifdef __GNUC__
#  define ERTS_NOINLINE __attribute__((__noinline__))
#else
#  define ERTS_NOINLINE
#endif

#define ERTS_I64_LITERAL(X) X##LL

#define ErtsInArea(ptr,start,nbytes) \
    ((UWord)((char*)(ptr) - (char*)(start)) < (nbytes))

#define ErtsInBetween(ptr,start,end) \
    ErtsInArea(ptr, start, (char*)(end) - (char*)(start))

#define ErtsContainerStruct(ptr, type, member) \
    ((type *)((char *)(1 ? (ptr) : &((type *)0)->member) - offsetof(type, member)))

/* Use this variant when the member is an array */
#define ErtsContainerStruct_(ptr, type, memberv) \
    ((type *)((char *)(1 ? (ptr) : ((type *)0)->memberv) - offsetof(type, memberv)))

#define ErtsSizeofMember(type, member) sizeof(((type *)0)->member)

#if defined (__WIN32__)
#  include "erl_win_sys.h"
#else
#  include "erl_unix_sys.h"
#ifndef UNIX
#  define UNIX 1
#endif
#endif

/*
 * Test for clang's convenient __has_builtin feature checking macro.
 */
#ifndef __has_builtin
  #define __has_builtin(x) 0
#endif

/*
 * Define HAVE_OVERFLOW_CHECK_BUILTINS if the overflow checking arithmetic
 * builtins are available.
 */
#if ERTS_AT_LEAST_GCC_VSN__(5, 1, 0)
#  define HAVE_OVERFLOW_CHECK_BUILTINS 1
#elif __has_builtin(__builtin_mul_overflow)
#  define HAVE_OVERFLOW_CHECK_BUILTINS 1
#endif

#include "erl_misc_utils.h"

/*
 * To allow building of Universal Binaries for Mac OS X,
 * we must not depend on the endian detected by the configure script.
 */
#if defined(__APPLE__)
#  if defined(__BIG_ENDIAN__) && !defined(WORDS_BIGENDIAN)
#    define WORDS_BIGENDIAN 1
#  elif !defined(__BIG_ENDIAN__) && defined(WORDS_BIGENDIAN)
#    undef WORDS_BIGENDIAN
#  endif
#endif

/*
 * Make sure we have a type for FD's (used by erl_check_io)
 */

#ifndef ERTS_SYS_FD_TYPE
#define ERTS_SYS_FD_INVALID ((ErtsSysFdType) -1)
typedef int ErtsSysFdType;
#else
#ifndef ERTS_SYS_FD_INVALID
# error missing ERTS_SYS_FD_INVALID
#endif
typedef ERTS_SYS_FD_TYPE ErtsSysFdType;
#endif

#if ERTS_AT_LEAST_GCC_VSN__(2, 96, 0)
#  define ERTS_LIKELY(BOOL)   __builtin_expect((BOOL), !0)
#  define ERTS_UNLIKELY(BOOL) __builtin_expect((BOOL), 0)
#else
#  define ERTS_LIKELY(BOOL)   (BOOL)
#  define ERTS_UNLIKELY(BOOL) (BOOL)
#endif

/* AIX doesn't like this and claims section conflicts */
#if ERTS_AT_LEAST_GCC_VSN__(2, 96, 0) && !defined(_AIX)
#if (defined(__APPLE__) && defined(__MACH__)) || defined(__DARWIN__)
#  define ERTS_WRITE_UNLIKELY(X) X __attribute__ ((section ("__DATA,ERTS_LOW_WRITE") ))
#else
#  define ERTS_WRITE_UNLIKELY(X) X __attribute__ ((section ("ERTS_LOW_WRITE") ))
#endif
#else
#  define ERTS_WRITE_UNLIKELY(X) X
#endif

/* clang may have too low __GNUC__ versions but can handle it */
#ifdef __GNUC__
#  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 5) || defined(__clang__)
#    define ERTS_DECLARE_DUMMY(X) X __attribute__ ((unused))
#  else
#    define ERTS_DECLARE_DUMMY(X) X
#  endif
#else
#  define ERTS_DECLARE_DUMMY(X) X
#endif

#if !defined(__func__)
#  if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901L
#    if !defined(__GNUC__) ||  __GNUC__ < 2
#      define __func__ "[unknown_function]"
#    else
#      define __func__ __FUNCTION__
#    endif
#  endif
#endif

#define ERTS_MK_VSN_INT(Major, Minor, Build) \
    ((((Major) & 0x3ff) << 20) | (((Minor) & 0x3ff) << 10) | ((Build) & 0x3ff))

#ifndef ERTS_EXIT_AFTER_DUMP
#  define ERTS_EXIT_AFTER_DUMP exit
#endif

/* In VC++, noreturn is a declspec that has to be before the types,
 * but in GNUC it is an attribute to be placed between return type
 * and function name, hence __decl_noreturn <types> __noreturn <function name>
 *
 * at some platforms (e.g. Android) __noreturn is defined at sys/cdef.h
 */
#if __GNUC__
#  define __decl_noreturn
#  ifndef __noreturn
#     define __noreturn __attribute__((noreturn))
#  endif
#else
#  if defined(__WIN32__) && defined(_MSC_VER)
#    define __noreturn
#    define __decl_noreturn __declspec(noreturn)
#  else
#    define __noreturn
#    define __decl_noreturn
#  endif
#endif

#define ERTS_ASSERT(e) \
    ((void) ((e) ? 1 : (erl_assert_error(#e, __func__, __FILE__, __LINE__), 0)))

__decl_noreturn void __noreturn erl_assert_error(const char* expr, const char *func,
						 const char* file, int line);

#ifdef DEBUG
#  define ASSERT(e) ERTS_ASSERT(e)
#else
#  define ASSERT(e) ((void) 1)
#endif

/* ERTS_UNDEF can be used to silence false warnings about
 * "variable may be used uninitialized" while keeping the variable
 * marked as undefined by valgrind.
 */
#ifdef VALGRIND
#  define ERTS_UNDEF(V,I)
#else
#  define ERTS_UNDEF(V,I) V = I
#endif

/*
 * ERTS_GCC_DIAG_ON and ERTS_GCC_DIAG_OFF can be used to temporarly
 * disable a gcc or clang warning in a file.
 *
 * Example:
 * GCC_DIAG_OFF(unused-function)
 * static int test(){ return 0;}
 * GCC_DIAG_ON(unused-function)
 *
 * These macros were originally authored by Jonathan Wakely and has
 * been modified by Patrick Horgan.
 *
 * Source: http://dbp-consulting.com/tutorials/SuppressingGCCWarnings.html
 *
 */
#if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
#define ERTS_GCC_DIAG_STR(s) #s
#define ERTS_GCC_DIAG_JOINSTR(x,y) ERTS_GCC_DIAG_STR(x ## y)
# define ERTS_GCC_DIAG_DO_PRAGMA(x) _Pragma (#x)
# define ERTS_GCC_DIAG_PRAGMA(x) ERTS_GCC_DIAG_DO_PRAGMA(GCC diagnostic x)
# if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
#  define ERTS_GCC_DIAG_OFF(x) ERTS_GCC_DIAG_PRAGMA(push) \
      ERTS_GCC_DIAG_PRAGMA(ignored ERTS_GCC_DIAG_JOINSTR(-W,x))
#  define ERTS_GCC_DIAG_ON(x) ERTS_GCC_DIAG_PRAGMA(pop)
# else
#  define ERTS_GCC_DIAG_OFF(x) ERTS_GCC_DIAG_PRAGMA(ignored ERTS_GCC_DIAG_JOINSTR(-W,x))
#  define ERTS_GCC_DIAG_ON(x)  ERTS_GCC_DIAG_PRAGMA(warning ERTS_GCC_DIAG_JOINSTR(-W,x))
# endif
#else
# define ERTS_GCC_DIAG_OFF(x)
# define ERTS_GCC_DIAG_ON(x)
#endif

/*
 * Compile time assert
 * (the actual compiler error msg can be a bit confusing)
 */
#if ERTS_AT_LEAST_GCC_VSN__(3,1,1) && !defined __cplusplus
# define ERTS_CT_ASSERT(e) \
    do { \
	enum { compile_time_assert__ = __builtin_choose_expr((e),0,(void)0) }; \
    } while(0)
#else
# define ERTS_CT_ASSERT(e) \
    do { \
        enum { compile_time_assert__ = 1/((int)(e)) };  \
    } while (0)
#endif

/*
 * Microsoft C/C++: We certainly want to use stdarg.h and prototypes.
 * But MSC doesn't define __STDC__, unless we compile with the -Za
 * flag (strict ANSI C, no Microsoft extension).  Compiling with -Za
 * doesn't work: some Microsoft headers fail to compile...
 *
 * Solution: Test if __STDC__ or _MSC_VER is defined.
 *
 * Note: Simply defining __STDC__ doesn't work, as some Microsoft
 * headers will fail to compile!
 */

#include <stdarg.h>

/* This isn't sys-dependent, but putting it here benefits sys.c and drivers
   - allow use of 'const' regardless of compiler */

#if !defined(__STDC__) && !defined(_MSC_VER)
#  define const
#endif

#undef __deprecated
#if ERTS_AT_LEAST_GCC_VSN__(3, 0, 0)
#  define __deprecated __attribute__((deprecated))
#else
#  define __deprecated
#endif
#if ERTS_AT_LEAST_GCC_VSN__(3, 0, 4)
#  define erts_align_attribute(SZ) __attribute__ ((aligned (SZ)))
#else
#  define erts_align_attribute(SZ)
#endif

/*
** Data types:
**
** Eterm: A tagged erlang term (possibly 64 bits)
** BeamInstr: A beam code instruction unit, possibly larger than Eterm, not smaller.
** Uint:  An unsigned integer exactly as large as an Eterm.
** Sint:  A signed integer exactly as large as an eterm and therefore large
**        enough to hold the return value of the signed_val() macro.
** UWord: An unsigned integer at least as large as a void * and also as large
**          or larger than an Eterm
** SWord: A signed integer at least as large as a void * and also as large
**          or larger than an Eterm
** Uint32: An unsigned integer of 32 bits exactly
** Sint32: A signed integer of 32 bits exactly
** Uint16: An unsigned integer of 16 bits exactly
** Sint16: A signed integer of 16 bits exactly.
*/

#if !((SIZEOF_VOID_P >= 4) && (SIZEOF_VOID_P == SIZEOF_SIZE_T) \
      && ((SIZEOF_VOID_P == SIZEOF_INT) || (SIZEOF_VOID_P == SIZEOF_LONG) || \
          (SIZEOF_VOID_P == SIZEOF_LONG_LONG)))
#error Cannot handle this combination of int/long/void*/size_t sizes
#endif

#if SIZEOF_VOID_P == 8
#undef  ARCH_32
#define ARCH_64
#define ERTS_SIZEOF_TERM 8
#elif SIZEOF_VOID_P == 4
#define ARCH_32
#undef  ARCH_64
#define ERTS_SIZEOF_TERM 4
#else
#error Neither 32 nor 64 bit architecture
#endif

#if SIZEOF_VOID_P != SIZEOF_SIZE_T
#error sizeof(void*) != sizeof(size_t)
#endif

#if SIZEOF_VOID_P == SIZEOF_LONG
typedef unsigned long Eterm erts_align_attribute(sizeof(long));
typedef unsigned long Uint  erts_align_attribute(sizeof(long));
typedef long          Sint  erts_align_attribute(sizeof(long));
#define SWORD_CONSTANT(Const) Const##L
#define UWORD_CONSTANT(Const) Const##UL
#define ERTS_UWORD_MAX ULONG_MAX
#define ERTS_SWORD_MAX LONG_MAX
#define ERTS_SWORD_MIN LONG_MIN
#define ERTS_SIZEOF_ETERM SIZEOF_LONG
#define ErtsStrToSint strtol
#elif SIZEOF_VOID_P == SIZEOF_INT
typedef unsigned int Eterm erts_align_attribute(sizeof(int));
typedef unsigned int Uint  erts_align_attribute(sizeof(int));
typedef int          Sint  erts_align_attribute(sizeof(int));
#define SWORD_CONSTANT(Const) Const
#define UWORD_CONSTANT(Const) Const##U
#define ERTS_UWORD_MAX UINT_MAX
#define ERTS_SWORD_MAX INT_MAX
#define ERTS_SWORD_MIN INT_MIN
#define ERTS_SIZEOF_ETERM SIZEOF_INT
#define ErtsStrToSint strtol
#elif SIZEOF_VOID_P == SIZEOF_LONG_LONG
typedef unsigned long long Eterm erts_align_attribute(sizeof(long long));
typedef unsigned long long Uint  erts_align_attribute(sizeof(long long));
typedef long long          Sint  erts_align_attribute(sizeof(long long));
#define SWORD_CONSTANT(Const) Const##LL
#define UWORD_CONSTANT(Const) Const##ULL
#define ERTS_UWORD_MAX ULLONG_MAX
#define ERTS_SWORD_MAX LLONG_MAX
#define ERTS_SWORD_MIN LLONG_MIN
#define ERTS_SIZEOF_ETERM SIZEOF_LONG_LONG
#if defined(__WIN32__)
#define ErtsStrToSint _strtoi64
#else
#define ErtsStrToSint strtoll
#endif
#else
#error Found no appropriate type to use for 'Eterm', 'Uint' and 'Sint'
#endif

typedef Uint UWord;
typedef Sint SWord;
#define ERTS_UINT_MAX ERTS_UWORD_MAX

typedef const void *ErtsCodePtr;
typedef UWord BeamInstr;

#ifndef HAVE_INT64
#  if SIZEOF_LONG == 8
#    define HAVE_INT64 1
typedef unsigned long Uint64;
typedef long          Sint64;
#    define ErtsStrToSint64 strtol
#  elif SIZEOF_LONG_LONG == 8
#    define HAVE_INT64 1
typedef unsigned long long Uint64;
typedef long long          Sint64;
#    define ErtsStrToSint64 strtoll
#  else
#    error "No 64-bit integer type found"
#  endif
#endif

#ifndef ERTS_UINT64_MAX
#  define ERTS_UINT64_MAX (~((Uint64) 0))
#endif
#ifndef ERTS_SINT64_MAX
#  define ERTS_SINT64_MAX ((Sint64) ((((Uint64) 1) << 63)-1))
#endif
#ifndef ERTS_SINT64_MIN
#  define ERTS_SINT64_MIN ((Sint64) ((((Uint64) 1) << 63)))
#endif

#if SIZEOF_LONG == 4
typedef unsigned long Uint32;
typedef long          Sint32;
#elif SIZEOF_INT == 4
typedef unsigned int Uint32;
typedef int          Sint32;
#else
#error Found no appropriate type to use for 'Uint32' and 'Sint32'
#endif

#ifndef ERTS_UINT32_MAX
#  define ERTS_UINT32_MAX (~((Uint32) 0))
#endif
#ifndef ERTS_SINT32_MAX
#  define ERTS_SINT32_MAX ((Sint32) ((((Uint32) 1) << 31)-1))
#endif
#ifndef ERTS_SINT32_MIN
#  define ERTS_SINT32_MIN ((Sint32) ((((Uint32) 1) << 31)))
#endif

#if SIZEOF_INT == 2
typedef unsigned int Uint16;
typedef int          Sint16;
#elif SIZEOF_SHORT == 2
typedef unsigned short Uint16;
typedef short          Sint16;
#else
#error Found no appropriate type to use for 'Uint16' and 'Sint16'
#endif

#ifndef ERTS_UINT16_MAX
#  define ERTS_UINT16_MAX (~((Uint16) 0))
#endif
#ifndef ERTS_SINT16_MAX
#  define ERTS_SINT16_MAX ((Sint16) ((((Uint16) 1) << 15)-1))
#endif
#ifndef ERTS_SINT16_MIN
#  define ERTS_SINT16_MIN ((Sint16) ((((Uint16) 1) << 15)))
#endif

#if CHAR_BIT == 8
typedef unsigned char byte;
#else
#error Found no appropriate type to use for 'byte'
#endif

#if defined(ARCH_64) && !HAVE_INT64
#error 64-bit architecture, but no appropriate type to use for Uint64 and Sint64 found 
#endif

#ifdef WORDS_BIGENDIAN
#  define ERTS_HUINT_HVAL_HIGH 0
#  define ERTS_HUINT_HVAL_LOW 1
#else
#  define ERTS_HUINT_HVAL_HIGH 1
#  define ERTS_HUINT_HVAL_LOW 0
#endif
#if ERTS_SIZEOF_TERM == 8
typedef union {
    Uint val;
    Uint32 hval[2];
} HUint;
#elif ERTS_SIZEOF_TERM == 4
typedef union {
    Uint val;
    Uint16 hval[2];
} HUint;
#else
#error "Unsupported size of term"
#endif

#  define ERTS_EXTRA_DATA_ALIGN_SZ(X) \
    (((size_t) 8) - (((size_t) (X)) & ((size_t) 7)))

#include "erl_lock_check.h"

/* needed by erl_threads.h */
int erts_send_warning_to_logger_str_nogl(char *);

#include "erl_threads.h"

#ifdef ERTS_WANT_BREAK_HANDLING
extern erts_atomic32_t erts_break_requested;
#    define ERTS_BREAK_REQUESTED \
  ((int) erts_atomic32_read_nob(&erts_break_requested))
void erts_do_break_handling(void);
#endif


extern erts_atomic32_t erts_writing_erl_crash_dump;
extern erts_tsd_key_t erts_is_crash_dumping_key;
#define ERTS_SOMEONE_IS_CRASH_DUMPING \
  ((int) erts_atomic32_read_mb(&erts_writing_erl_crash_dump))
#define ERTS_IS_CRASH_DUMPING \
  ((int) (SWord) erts_tsd_get(erts_is_crash_dumping_key))

/* Deal with memcpy() vs bcopy() etc. We want to use the mem*() functions,
   but be able to fall back on bcopy() etc on systems that don't have
   mem*(), but this doesn't work to well with memset()/bzero() - thus the
   memzero() macro.
*/

/* xxxP */
#if defined(USE_BCOPY)
#  define memcpy(a, b, c) bcopy((b), (a), (c))
#  define memcmp(a, b, c) bcmp((a), (b), (c))
#  define memzero(buf, len) bzero((buf), (len))
#else
#  define memzero(buf, len) memset((buf), '\0', (len))
#endif

/* Stuff that is useful for port programs, drivers, etc */

#ifdef ISC32			/* Too much for the Makefile... */
#  define signal	sigset
#  define NO_ASINH
#  define NO_ACOSH
#  define NO_ATANH
#  define NO_FTRUNCATE
#  define SIG_SIGHOLD
#  define _POSIX_SOURCE 
#  define _XOPEN_SOURCE
#endif

#ifdef QNX			/* Too much for the Makefile... */
#  define SYS_SELECT_H
#  define NO_ERF
#  define NO_ERFC
/* This definition doesn't take NaN into account, but matherr() gets those */
#  define isfinite(x) (fabs(x) != HUGE_VAL)
#  define USE_MATHERR
#  define HAVE_FINITE
#endif


#ifdef WANT_NONBLOCKING	    /* must define this to pull in fcntl.h/ioctl.h */

/* This is really a mess... We used to use fcntl O_NDELAY, but that seems
   to only work on SunOS 4 - in particular, on SysV-based systems
   (including Solaris 2), it does set non-blocking mode, but causes
   read() to return 0!!  fcntl O_NONBLOCK is specified by POSIX, and
   seems to work on most systems, with the notable exception of AIX,
   where the old ioctl FIONBIO is the *only* one that will set a *socket*
   in non-blocking mode - and ioctl FIONBIO on AIX *doesn't* work for
   pipes or ttys (O_NONBLOCK does)!!! For now, we'll use FIONBIO for AIX. */

#  ifdef __WIN32__

static unsigned long zero_value = 0, one_value = 1;
#    define SET_BLOCKING(fd)	{ if (ioctlsocket((fd), FIONBIO, &zero_value) != 0) fprintf(stderr, "Error setting socket to non-blocking: %d\n", WSAGetLastError()); }
#    define SET_NONBLOCKING(fd)	ioctlsocket((fd), FIONBIO, &one_value)

#  else
#    ifdef NB_FIONBIO		/* Old BSD */
#      include <sys/ioctl.h>
  static const int zero_value = 0, one_value = 1;
#      define SET_BLOCKING(fd)         ioctl((fd), FIONBIO, &zero_value)
#      define SET_NONBLOCKING(fd)      ioctl((fd), FIONBIO, &one_value)
#      define ERRNO_BLOCK EWOULDBLOCK
#    else /* !NB_FIONBIO */
#      include <fcntl.h>
#      ifdef NB_O_NDELAY               /* Nothing needs this? */
#        define NB_FLAG O_NDELAY
#        ifndef ERRNO_BLOCK            /* allow override (e.g. EAGAIN) via Makefile */
#          define ERRNO_BLOCK EWOULDBLOCK
#        endif
#      else  /* !NB_O_NDELAY */	/* The True Way - POSIX!:-) */
#        define NB_FLAG O_NONBLOCK
#        define ERRNO_BLOCK EAGAIN
#      endif /* !NB_O_NDELAY */
#      define SET_BLOCKING(fd)         fcntl((fd), F_SETFL, \
                                           fcntl((fd), F_GETFL, 0) & ~NB_FLAG)
#      define SET_NONBLOCKING(fd)      fcntl((fd), F_SETFL, \
                                           fcntl((fd), F_GETFL, 0) | NB_FLAG)
#    endif /* !NB_FIONBIO */
#  endif /* !__WIN32__ */
#endif /* WANT_NONBLOCKING */

__decl_noreturn void __noreturn erts_exit(int n, const char*, ...);

/* Some special erts_exit() codes: */
#define ERTS_INTR_EXIT	-1		/* called from signal handler */
#define ERTS_ABORT_EXIT	-2	        /* no crash dump; only abort() */
#define ERTS_DUMP_EXIT	-3              /* crash dump; then exit() */
#define ERTS_ERROR_EXIT	-4              /* crash dump; then abort() */

#define ERTS_INTERNAL_ERROR(What) \
    erts_exit(ERTS_ABORT_EXIT, "%s:%d:%s(): Internal error: %s\n", \
	     __FILE__, __LINE__, __func__, What)

UWord erts_sys_get_page_size(void);

/* Size of misc memory allocated from system dependent code */
Uint erts_sys_misc_mem_sz(void);

/* print stuff is declared here instead of in global.h, so sys stuff won't
   have to include global.h */
#include "erl_printf.h"

/* Io constants to erts_print and erts_putc */
#define ERTS_PRINT_STDERR	((fmtfn_t)0)
#define ERTS_PRINT_STDOUT	((fmtfn_t)1)
#define ERTS_PRINT_FILE		((fmtfn_t)2)
#define ERTS_PRINT_SBUF		((fmtfn_t)3)
#define ERTS_PRINT_SNBUF	((fmtfn_t)4)
#define ERTS_PRINT_DSBUF	((fmtfn_t)5)
#define ERTS_PRINT_FD           ((fmtfn_t)6)

typedef struct {
    char *buf;
    size_t size;
} erts_print_sn_buf;

int erts_print(fmtfn_t to, void *arg, char *format, ...);	/* in utils.c */
int erts_putc(fmtfn_t to, void *arg, char);			/* in utils.c */

/* logger stuff is declared here instead of in global.h, so sys files
   won't have to include global.h */

erts_dsprintf_buf_t *erts_create_logger_dsbuf(void);
int erts_send_info_to_logger(Eterm, erts_dsprintf_buf_t *);
int erts_send_warning_to_logger(Eterm, erts_dsprintf_buf_t *);
int erts_send_error_to_logger(Eterm, erts_dsprintf_buf_t *);
int erts_send_error_term_to_logger(Eterm, erts_dsprintf_buf_t *, Eterm);
int erts_send_info_to_logger_str(Eterm, char *); 
int erts_send_warning_to_logger_str(Eterm, char *);
int erts_send_error_to_logger_str(Eterm, char *);
int erts_send_info_to_logger_nogl(erts_dsprintf_buf_t *);
int erts_send_warning_to_logger_nogl(erts_dsprintf_buf_t *);
int erts_send_error_to_logger_nogl(erts_dsprintf_buf_t *);
int erts_send_info_to_logger_str_nogl(char *);
/* needed by erl_threads.h (declared above)
   int erts_send_warning_to_logger_str_nogl(char *); */
int erts_send_error_to_logger_str_nogl(char *);

typedef struct preload {
    char *name;			/* Name of module */
    int  size;			/* Size of code */
    unsigned char* code;	/* Code pointer */
} Preload;

/*
 * ErtsTracer is either NIL, 'true' or [Mod | State]
 *
 * If set to NIL, it means no tracer.
 * If set to 'true' it means the current process' tracer.
 * If set to [Mod | State], there is a tracer.
 *  See erts_tracer_update for more details
 */
typedef Eterm ErtsTracer;


/*
 * This structure contains the rb tree for the erlang osenv copy
 * see erl_osenv.h for more details.
 */
typedef struct __erts_osenv_t {
    struct __env_rbtnode_t *tree;
    int variable_count;
    int content_size;
} erts_osenv_t;

extern char *erts_default_arg0;

extern char os_type[];

typedef struct {
    int have_os_monotonic_time;
    int have_corrected_os_monotonic_time;
    ErtsMonotonicTime os_monotonic_time_unit;
    ErtsMonotonicTime sys_clock_resolution;
    struct {
	Uint64 resolution;
	char *func;
	char *clock_id;
	int locked_use;
	int extended;
    } os_monotonic_time_info;
    struct {
	Uint64 resolution;
	char *func;
	char *clock_id;
	int locked_use;
    } os_system_time_info;
} ErtsSysInitTimeResult;

#define ERTS_SYS_INIT_TIME_RESULT_INITER \
    {0, 0, (ErtsMonotonicTime) -1, (ErtsMonotonicTime) 1}

extern void erts_init_sys_time_sup(void);
extern void sys_init_time(ErtsSysInitTimeResult *);
extern void erts_late_sys_init_time(void);
extern void erts_deliver_time(void);
extern void erts_time_remaining(SysTimeval *);
extern void erts_sys_init_float(void);

/* Dynamic library/driver loading */
typedef struct {
    char* str;
}ErtsSysDdllError;
#define ERTS_SYS_DDLL_ERROR_INIT {NULL}
extern void erts_sys_ddll_free_error(ErtsSysDdllError*);
extern void erl_sys_ddll_init(void); /* to initialize mutexes etc */
extern int erts_sys_ddll_open(const char *path, void **handle, ErtsSysDdllError*);
extern int erts_sys_ddll_open_noext(char *path, void **handle, ErtsSysDdllError*);
extern int erts_sys_ddll_load_driver_init(void *handle, void **function);
extern int erts_sys_ddll_load_nif_init(void *handle, void **function,ErtsSysDdllError*);
extern int erts_sys_ddll_close2(void *handle, ErtsSysDdllError*);
#define erts_sys_ddll_close(H) erts_sys_ddll_close2(H,NULL)
extern void *erts_sys_ddll_call_init(void *function);
extern void *erts_sys_ddll_call_nif_init(void *function);
extern int erts_sys_ddll_sym2(void *handle, const char *name, void **function, ErtsSysDdllError*);
#define erts_sys_ddll_sym(H,N,F) erts_sys_ddll_sym2(H,N,F,NULL)
extern int erts_sys_ddll_vsym2(void *handle, const char *name, const char *vers, void **function, ErtsSysDdllError*);
#define erts_sys_ddll_vsym(H,N,V,F) erts_sys_ddll_vsym2(H,N,V,F,NULL)
extern char *erts_sys_ddll_error(int code);



/*
 * System interfaces for startup.
 */
void erts_sys_main_thread(void);

extern int erts_sys_prepare_crash_dump(int secs);
extern void erts_sys_pre_init(void);

/* Platform-specific scheduler initialization, e.g. signal stack swapping. */
extern void erts_sys_scheduler_init(void);

extern void erl_sys_init(void);
extern void erl_sys_late_init(void);
extern void erl_sys_args(int *argc, char **argv);
extern void erl_sys_schedule(int);
void sys_tty_reset(int);

int sys_max_files(void);
void sys_init_io(void);
Preload* sys_preloaded(void);
unsigned char* sys_preload_begin(Preload*);
void sys_preload_end(Preload*);
int sys_get_key(int);
void get_time(int *hour, int *minute, int *second);
void get_date(int *year, int *month, int *day);
void get_localtime(int *year, int *month, int *day, 
		   int *hour, int *minute, int *second);
void get_universaltime(int *year, int *month, int *day, 
		       int *hour, int *minute, int *second);
int seconds_to_univ(Sint64 seconds, 
		    Sint *year, Sint *month, Sint *day, 
		    Sint *hour, Sint *minute, Sint *second);
int univ_to_seconds(Sint year, Sint month, Sint day, 
		    Sint hour, Sint minute, Sint second,
		    Sint64* seconds);
int univ_to_local(
    Sint *year, Sint *month, Sint *day, 
		  Sint *hour, Sint *minute, Sint *second);
int local_to_univ(Sint *year, Sint *month, Sint *day, 
		  Sint *hour, Sint *minute, Sint *second, int isdst);
void get_now(Uint*, Uint*, Uint*);
struct ErtsSchedulerData_;
ErtsMonotonicTime erts_get_monotonic_time(struct ErtsSchedulerData_ *);
ErtsMonotonicTime erts_get_time_offset(void);
void
erts_make_timestamp_value(Uint* megasec, Uint* sec, Uint* microsec,
			  ErtsMonotonicTime mtime, ErtsMonotonicTime offset);
void get_sys_now(Uint*, Uint*, Uint*);
void set_break_quit(void (*)(void), void (*)(void));

void os_flavor(char*, unsigned);
void os_version(int*, int*, int*);

#define HAVE_ERTS_CHECK_IO_DEBUG
typedef struct {
    int no_used_fds;
    int no_driver_select_structs;
    int no_enif_select_structs;
} ErtsCheckIoDebugInfo;
int erts_check_io_debug(ErtsCheckIoDebugInfo *ip);

int erts_sys_is_area_readable(char *start, char *stop);

/* xxxP */
#define SYS_DEFAULT_FLOAT_DECIMALS 20
void init_sys_float(void);
int sys_chars_to_double(char*, double*);
int sys_double_to_chars(double, char*, size_t);
int sys_double_to_chars_ext(double, char*, size_t, size_t);
int sys_double_to_chars_fast(double, char*, int, int, int);
void sys_get_pid(char *, size_t);

/* erl_drv_get/putenv have been implicitly 8-bit for so long that we can't
 * change them without breaking things on Windows. Their return values are
 * identical to erts_osenv_get/putenv */
int erts_sys_explicit_8bit_getenv(char *key, char *value, size_t *size);
int erts_sys_explicit_8bit_putenv(char *key, char *value);

/* This is identical to erts_sys_explicit_8bit_getenv but falls down to the
 * host OS implementation instead of erts_osenv. */
int erts_sys_explicit_host_getenv(char *key, char *value, size_t *size);

const erts_osenv_t *erts_sys_rlock_global_osenv(void);
void erts_sys_runlock_global_osenv(void);

erts_osenv_t *erts_sys_rwlock_global_osenv(void);
void erts_sys_rwunlock_global_osenv(void);

/* Easier to use, but not as efficient, environment functions */
char *erts_read_env(char *key);
void erts_free_read_env(void *value);

#if defined(ERTS_THR_HAVE_SIG_FUNCS) &&                         \
    (!defined(ETHR_UNUSABLE_SIGUSRX) || defined(SIGRTMIN))
extern void sys_thr_resume(erts_tid_t tid);
extern void sys_thr_suspend(erts_tid_t tid);
#ifdef SIGRTMIN
#define ERTS_SYS_SUSPEND_SIGNAL (SIGRTMIN+1)
#else
#define ERTS_SYS_SUSPEND_SIGNAL (SIGUSR2)
#endif /* SIGRTMIN */
#endif /* HAVE_SIG_FUNCS */

/* utils.c */

/* Options to sys_alloc_opt */
#define SYS_ALLOC_OPT_TRIM_THRESHOLD 0
#define SYS_ALLOC_OPT_TOP_PAD        1
#define SYS_ALLOC_OPT_MMAP_THRESHOLD 2
#define SYS_ALLOC_OPT_MMAP_MAX       3

/* Default values to sys_alloc_opt options */
#define ERTS_DEFAULT_TRIM_THRESHOLD  (128 * 1024)
#define ERTS_DEFAULT_TOP_PAD         0
#define ERTS_DEFAULT_MMAP_THRESHOLD  (128 * 1024)
#define ERTS_DEFAULT_MMAP_MAX        64

int sys_alloc_opt(int, int);

typedef struct {
  int trim_threshold;
  int top_pad;
  int mmap_threshold;
  int mmap_max;
} SysAllocStat;

void sys_alloc_stat(SysAllocStat *);

#if defined(DEBUG) || defined(ERTS_ENABLE_LOCK_CHECK)
#undef ERTS_REFC_DEBUG
#define ERTS_REFC_DEBUG
#endif

typedef erts_atomic_t erts_refc_t;

ERTS_GLB_INLINE void erts_refc_init(erts_refc_t *refcp, erts_aint_t val);
ERTS_GLB_INLINE void erts_refc_inc(erts_refc_t *refcp, erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_inc_unless(erts_refc_t *refcp,
                                                 erts_aint_t unless_val,
                                                 erts_aint_t min_val);
ERTS_GLB_INLINE void erts_refc_inc_if(erts_refc_t *refcp,
                                      erts_aint_t if_val,
                                      erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_inctest(erts_refc_t *refcp,
					      erts_aint_t min_val);
ERTS_GLB_INLINE void erts_refc_dec(erts_refc_t *refcp, erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_dectest(erts_refc_t *refcp,
					      erts_aint_t min_val);
ERTS_GLB_INLINE void erts_refc_add(erts_refc_t *refcp, erts_aint_t diff,
				   erts_aint_t min_val);
ERTS_GLB_INLINE erts_aint_t erts_refc_read(erts_refc_t *refcp,
					   erts_aint_t min_val);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE void
erts_refc_init(erts_refc_t *refcp, erts_aint_t val)
{
    erts_atomic_init_nob((erts_atomic_t *) refcp, val);
}

ERTS_GLB_INLINE void
erts_refc_inc(erts_refc_t *refcp, erts_aint_t min_val)
{
#ifdef ERTS_REFC_DEBUG
    erts_aint_t val = erts_atomic_inc_read_nob((erts_atomic_t *) refcp);
    if (val < min_val)
	erts_exit(ERTS_ABORT_EXIT,
		 "erts_refc_inc(): Bad refc found (refc=%ld < %ld)!\n",
		 val, min_val);
#else
    erts_atomic_inc_nob((erts_atomic_t *) refcp);
#endif
}

ERTS_GLB_INLINE erts_aint_t
erts_refc_inc_unless(erts_refc_t *refcp,
                     erts_aint_t unless_val,
                     erts_aint_t min_val)
{
    erts_aint_t val = erts_atomic_read_nob((erts_atomic_t *) refcp);
    while (1) {
        erts_aint_t exp, new_value;
#ifdef ERTS_REFC_DEBUG
        if (val < min_val)
            erts_exit(ERTS_ABORT_EXIT,
                      "erts_refc_inc_unless(): Bad refc found (refc=%ld < %ld)!\n",
                      val, min_val);
#endif
        if (val == unless_val)
            return val;
        new_value = val + 1;
        exp = val;
        val = erts_atomic_cmpxchg_nob((erts_atomic_t *) refcp, new_value, exp);
        if (val == exp)
            return new_value;
    }
}

ERTS_GLB_INLINE void
erts_refc_inc_if(erts_refc_t *refcp,
                 erts_aint_t if_val,
                 erts_aint_t min_val)
{
    erts_aint_t val = erts_atomic_read_nob((erts_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
    if (val < min_val)
        erts_exit(ERTS_ABORT_EXIT,
                  "erts_refc_inc_unless(): Bad refc found (refc=%ld < %ld)!\n",
                  val, min_val);
#endif
    if (val == if_val) {
        erts_atomic_cmpxchg_nob((erts_atomic_t *) refcp, val+1, val);
        /*
         * Ignore failure, as it means someone else took care of 'if_val'.
         * Could be this function racing with itself.
         */
    }
}

ERTS_GLB_INLINE erts_aint_t
erts_refc_inctest(erts_refc_t *refcp, erts_aint_t min_val)
{
    erts_aint_t val = erts_atomic_inc_read_nob((erts_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
    if (val < min_val)
	erts_exit(ERTS_ABORT_EXIT,
		 "erts_refc_inctest(): Bad refc found (refc=%ld < %ld)!\n",
		 val, min_val);
#endif
    return val;
}

ERTS_GLB_INLINE void
erts_refc_dec(erts_refc_t *refcp, erts_aint_t min_val)
{
#ifdef ERTS_REFC_DEBUG
    erts_aint_t val = erts_atomic_dec_read_nob((erts_atomic_t *) refcp);
    if (val < min_val)
	erts_exit(ERTS_ABORT_EXIT,
		 "erts_refc_dec(): Bad refc found (refc=%ld < %ld)!\n",
		 val, min_val);
#else
    erts_atomic_dec_nob((erts_atomic_t *) refcp);
#endif
}

ERTS_GLB_INLINE erts_aint_t
erts_refc_dectest(erts_refc_t *refcp, erts_aint_t min_val)
{
    erts_aint_t val = erts_atomic_dec_read_nob((erts_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
    if (val < min_val)
	erts_exit(ERTS_ABORT_EXIT,
		 "erts_refc_dectest(): Bad refc found (refc=%ld < %ld)!\n",
		 val, min_val);
#endif
    return val;
}

ERTS_GLB_INLINE void
erts_refc_add(erts_refc_t *refcp, erts_aint_t diff, erts_aint_t min_val)
{
#ifdef ERTS_REFC_DEBUG
    erts_aint_t val = erts_atomic_add_read_nob((erts_atomic_t *) refcp, diff);
    if (val < min_val)
	erts_exit(ERTS_ABORT_EXIT,
		 "erts_refc_add(%ld): Bad refc found (refc=%ld < %ld)!\n",
		 diff, val, min_val);
#else
    erts_atomic_add_nob((erts_atomic_t *) refcp, diff);
#endif
}

ERTS_GLB_INLINE erts_aint_t
erts_refc_read(erts_refc_t *refcp, erts_aint_t min_val)
{
    erts_aint_t val = erts_atomic_read_nob((erts_atomic_t *) refcp);
#ifdef ERTS_REFC_DEBUG
    if (val < min_val)
	erts_exit(ERTS_ABORT_EXIT,
		 "erts_refc_read(): Bad refc found (refc=%ld < %ld)!\n",
		 val, min_val);
#endif
    return val;
}

#endif  /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */


/* Thin wrappers around memcpy and friends, which should always be used in
 * place of plain memcpy, memset, etc.
 *
 * Passing NULL to any of these functions is undefined behavior even though it
 * may seemingly work when the length (if any) is zero; a compiler can take
 * this as a hint that the passed operand may *never* be NULL and then optimize
 * based on that information.
 */
ERTS_GLB_INLINE void *sys_memcpy(void *dest, const void *src, size_t n);
ERTS_GLB_INLINE void *sys_memmove(void *dest, const void *src, size_t n);
ERTS_GLB_INLINE int sys_memcmp(const void *s1, const void *s2, size_t n);
ERTS_GLB_INLINE void *sys_memset(void *s, int c, size_t n);
ERTS_GLB_INLINE void *sys_memzero(void *s, size_t n);
ERTS_GLB_INLINE int sys_strcmp(const char *s1, const char *s2);
ERTS_GLB_INLINE int sys_strncmp(const char *s1, const char *s2, size_t n);
ERTS_GLB_INLINE char *sys_strcpy(char *dest, const char *src);
ERTS_GLB_INLINE char *sys_strncpy(char *dest, const char *src, size_t n);
ERTS_GLB_INLINE size_t sys_strlen(const char *s);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE void *sys_memcpy(void *dest, const void *src, size_t n)
{
    ASSERT(dest != NULL && src != NULL);
    return memcpy(dest,src,n);
}
ERTS_GLB_INLINE void *sys_memmove(void *dest, const void *src, size_t n)
{
    ASSERT(dest != NULL && src != NULL);
    return memmove(dest,src,n);
}
ERTS_GLB_INLINE int sys_memcmp(const void *s1, const void *s2, size_t n)
{
    ASSERT(s1 != NULL && s2 != NULL);
    return memcmp(s1,s2,n);
}
ERTS_GLB_INLINE void *sys_memset(void *s, int c, size_t n)
{
    ASSERT(s != NULL);
    return memset(s,c,n);
}
ERTS_GLB_INLINE void *sys_memzero(void *s, size_t n)
{
    ASSERT(s != NULL);
    return memset(s,'\0',n);
}
ERTS_GLB_INLINE int sys_strcmp(const char *s1, const char *s2)
{
    ASSERT(s1 != NULL && s2 != NULL);
    return strcmp(s1,s2);
}
ERTS_GLB_INLINE int sys_strncmp(const char *s1, const char *s2, size_t n)
{
    ASSERT(s1 != NULL && s2 != NULL);
    return strncmp(s1,s2,n);
}
ERTS_GLB_INLINE char *sys_strcpy(char *dest, const char *src)
{
    ASSERT(dest != NULL && src != NULL);
    return strcpy(dest,src);

}
ERTS_GLB_INLINE char *sys_strncpy(char *dest, const char *src, size_t n)
{
    ASSERT(dest != NULL && src != NULL);
    return strncpy(dest,src,n);
}
ERTS_GLB_INLINE size_t sys_strlen(const char *s)
{
    ASSERT(s != NULL);
    return strlen(s);
}
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */

/* define function symbols (needed in sys_drv_api) */
#define sys_fp_alloc     sys_alloc
#define sys_fp_realloc   sys_realloc
#define sys_fp_free      sys_free
#define sys_fp_memcpy    memcpy
#define sys_fp_memmove   memmove
#define sys_fp_memcmp    memcmp
#define sys_fp_memset    memset
/* #define sys_fp_memzero    elib_memzero */
#define sys_fp_strcmp    strcmp
#define sys_fp_strncmp   strncmp
#define sys_fp_strcpy    strcpy
#define sys_fp_strncpy   strncpy
#define sys_fp_strlen    strlen


/* Return codes from the nb_read and nb_write functions */
#define FD_READY 1
#define FD_CONTINUE 2
#define FD_ERROR 3



/* Standard set of integer macros  .. */

#define get_int64(s) (((Uint64)(((byte*) (s))[0]) << 56) | \
                      (((Uint64)((byte*) (s))[1]) << 48) | \
                      (((Uint64)((byte*) (s))[2]) << 40) | \
                      (((Uint64)((byte*) (s))[3]) << 32) | \
                      (((Uint64)((byte*) (s))[4]) << 24) | \
                      (((Uint64)((byte*) (s))[5]) << 16) | \
                      (((Uint64)((byte*) (s))[6]) << 8)  | \
                      (((Uint64)((byte*) (s))[7])))

#define put_int64(i, s) do {((byte*)(s))[0] = (byte)((Sint64)(i) >> 56) & 0xff;\
                            ((byte*)(s))[1] = (byte)((Sint64)(i) >> 48) & 0xff;\
                            ((byte*)(s))[2] = (byte)((Sint64)(i) >> 40) & 0xff;\
                            ((byte*)(s))[3] = (byte)((Sint64)(i) >> 32) & 0xff;\
                            ((byte*)(s))[4] = (byte)((Sint64)(i) >> 24) & 0xff;\
                            ((byte*)(s))[5] = (byte)((Sint64)(i) >> 16) & 0xff;\
                            ((byte*)(s))[6] = (byte)((Sint64)(i) >> 8)  & 0xff;\
                            ((byte*)(s))[7] = (byte)((Sint64)(i))       & 0xff;\
                           } while (0) 

/* Returns a signed int */
#define get_int32(s) ((((byte*) (s))[0] << 24) | \
                      (((byte*) (s))[1] << 16) | \
                      (((byte*) (s))[2] << 8)  | \
                      (((byte*) (s))[3]))

#define get_little_int32(s) ((((byte*) (s))[3] << 24) | \
			     (((byte*) (s))[2] << 16)  | \
			     (((byte*) (s))[1] << 8) | \
			     (((byte*) (s))[0]))

#define get_uint32(s) ((Uint32)get_int32(s))

#define put_int32(i, s) do {((byte*)(s))[0] = (byte)((i) >> 24) & 0xff;  \
                            ((byte*)(s))[1] = (byte)((i) >> 16) & 0xff;  \
                            ((byte*)(s))[2] = (byte)((i) >> 8)  & 0xff;  \
                            ((byte*)(s))[3] = (byte)(i)         & 0xff;} \
                        while (0)

#define get_int24(s) ((((byte*) (s))[0] << 16) | \
                      (((byte*) (s))[1] << 8)  | \
                      (((byte*) (s))[2]))


#define put_int24(i, s) do {((byte*)(s))[0] = (byte)((i) >> 16) & 0xff;  \
                            ((byte*)(s))[1] = (byte)((i) >> 8)  & 0xff;  \
                            ((byte*)(s))[2] = (byte)(i)         & 0xff;} \
                        while (0)

#define get_int16(s) ((((byte*)  (s))[0] << 8) | \
                      (((byte*)  (s))[1]))


#define put_int16(i, s) do {((byte*)(s))[0] = (byte)((i) >> 8) & 0xff;  \
                            ((byte*)(s))[1] = (byte)(i)        & 0xff;} \
                        while (0)

#define get_int8(s) ((((byte*)  (s))[0] ))


#define put_int8(i, s) do {((byte*)(s))[0] = (i) & 0xff;} while (0)

/*
 * Use DEBUGF as you would use printf, but use double parentheses:
 *
 *   DEBUGF(("Error: %s\n", error));
 *
 * The output will appear in a special console.
 */

#ifdef DEBUG
void erl_debug(char* format, ...);
void erl_bin_write(unsigned char *, int, int);

#  define DEBUGF(x) erl_debug x
#else
#  define DEBUGF(x)
#endif

#ifndef MAX
#define MAX(A, B) ((A) > (B) ? (A) : (B))
#endif

#ifndef MIN
#define MIN(A, B) ((A) < (B) ? (A) : (B))
#endif

#ifdef __WIN32__
#ifdef ARCH_64
#define ERTS_ALLOC_ALIGN_BYTES 16
#define ERTS_SMALL_ABS(Small) _abs64(Small) 
#else
#define ERTS_ALLOC_ALIGN_BYTES 8
#define ERTS_SMALL_ABS(Small) labs(Small) 
#endif
#else
#define ERTS_ALLOC_ALIGN_BYTES 8
#define ERTS_SMALL_ABS(Small) labs(Small) 
#endif

#ifndef ERTS_HAVE_ERTS_SYS_ALIGNED_ALLOC
#  define ERTS_HAVE_ERTS_SYS_ALIGNED_ALLOC 0
#endif

#ifdef __WIN32__
void call_break_handler(void);
char* last_error(void);
char* win32_errorstr(int);
#endif

/************************************************************************
 * Find out the native filename encoding of the process (look at locale of 
 * Unix processes and just do UTF16 on windows 
 ************************************************************************/
#define ERL_FILENAME_UNKNOWN   (0)
#define ERL_FILENAME_LATIN1    (1)
#define ERL_FILENAME_UTF8      (2)
#define ERL_FILENAME_UTF8_MAC  (3)
#define ERL_FILENAME_WIN_WCHAR (4)

/************************************************************************
 * If a filename in for example list_dir is not in the right encoding, it
 * will be skipped in the resulting list, but depending on a startup setting
 * we will inform the user in different ways. These macros define the
 * different reactions to wrongly coded filenames. In the error case an
 * exception will be thrown by prim_file.
 ************************************************************************/
#define ERL_FILENAME_WARNING_WARNING (0)
#define ERL_FILENAME_WARNING_IGNORE (1)
#define ERL_FILENAME_WARNING_ERROR (2)

/***********************************************************************
 * The user can request a range of character that he/she consider
 * printable. Currently this can be either latin1 or unicode, but
 * in the future a set of ranges, or languages, could be specified.
 ***********************************************************************/
#define ERL_PRINTABLE_CHARACTERS_LATIN1 (0)
#define ERL_PRINTABLE_CHARACTERS_UNICODE (1)

int erts_get_native_filename_encoding(void);
/* The set function is only to be used by erl_init! */
void erts_set_user_requested_filename_encoding(int encoding, int warning);
int erts_get_user_requested_filename_encoding(void);
int erts_get_filename_warning_type(void);
/* This function is called from erl_init. The setting is read by BIF's 
   in io/io_lib. Setting is not atomic. */
void erts_set_printable_characters(int range);
/* Get the setting (ERL_PRINTABLE_CHARACTERS_{LATIN1|UNICODE} */
int erts_get_printable_characters(void);

void erts_init_sys_common_misc(void);

ERTS_GLB_INLINE Sint erts_raw_env_7bit_ascii_char_need(int encoding);
ERTS_GLB_INLINE byte *erts_raw_env_7bit_ascii_char_put(byte c, byte *p,
                                                       int encoding);
ERTS_GLB_INLINE int  erts_raw_env_char_is_7bit_ascii_char(byte c, byte *p,
                                                          int encoding);
ERTS_GLB_INLINE byte *erts_raw_env_next_char(byte *p, int encoding);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE Sint
erts_raw_env_7bit_ascii_char_need(int encoding)
{
    return (encoding == ERL_FILENAME_WIN_WCHAR) ? 2 : 1;
}

ERTS_GLB_INLINE byte *
erts_raw_env_7bit_ascii_char_put(byte c,
                                 byte *p,
                                 int encoding)
{
    *(p++) = c;
    if (encoding == ERL_FILENAME_WIN_WCHAR)
        *(p++) = 0;
    return p;
}

ERTS_GLB_INLINE int
erts_raw_env_char_is_7bit_ascii_char(byte c,
                                     byte *p,
                                     int encoding)
{
    if (encoding == ERL_FILENAME_WIN_WCHAR)
        return (p[0] == c) & (p[1] == 0);
    else
        return p[0] == c;
}

ERTS_GLB_INLINE byte *
erts_raw_env_next_char(byte *p, int encoding)
{
    if (encoding == ERL_FILENAME_WIN_WCHAR)
        return p + 2;
    else
        return p + 1;
}

#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */

/*
 * Magic numbers for our driver port_control callbacks.
 * Kept them below 1<<27 to not inflict extra bignum garbage on 32-bit.
 */
#define ERTS_TTYSL_DRV_CONTROL_MAGIC_NUMBER  0x018b0900U
#define ERTS_INET_DRV_CONTROL_MAGIC_NUMBER   0x03f1a300U
#define ERTS_SPAWN_DRV_CONTROL_MAGIC_NUMBER  0x04c76a00U
#define ERTS_FORKER_DRV_CONTROL_MAGIC_NUMBER 0x050a7800U

#endif