summaryrefslogtreecommitdiffstats
path: root/src/H5E.c
blob: a56181d18ef85903ae7115ca3ca70559cea4f15b (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
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Purpose:	Provides error handling in the form of a stack.  The
 *		FUNC_ENTER() macro clears the error stack whenever an API
 *		function is entered.  When an error is detected, an entry is
 *		pushed onto the stack.  As the functions unwind additional
 *		entries are pushed onto the stack. The API function will
 *		return some indication that an error occurred and the
 *		application can print the error stack.
 *
 *		Certain API functions in the H5E package (such as H5Eprint2())
 *		do not clear the error stack.  Otherwise, any function which
 *		doesn't have an underscore immediately after the package name
 *		will clear the error stack.  For instance, H5Fopen() clears
 *		the error stack while H5F_open() does not.
 *
 *		An error stack has a fixed maximum size.  If this size is
 *		exceeded then the stack will be truncated and only the
 *		inner-most functions will have entries on the stack. This is
 *		expected to be a rare condition.
 *
 *		Each thread has its own error stack, but since
 *		multi-threading has not been added to the library yet, this
 *		package maintains a single error stack. The error stack is
 *		statically allocated to reduce the complexity of handling
 *		errors within the H5E package.
 *
 */

/****************/
/* Module Setup */
/****************/

#include "H5Emodule.h"          /* This source code file is part of the H5E module */


/***********/
/* Headers */
/***********/
#include "H5private.h"          /* Generic Functions                        */
#include "H5Epkg.h"             /* Error handling                           */
#include "H5FLprivate.h"        /* Free lists                               */
#include "H5Iprivate.h"         /* IDs                                      */
#include "H5MMprivate.h"        /* Memory management                        */

/****************/
/* Local Macros */
/****************/

/* HDF5 error class */
#define H5E_CLS_NAME         "HDF5"
#define H5E_CLS_LIB_NAME     "HDF5"


/******************/
/* Local Typedefs */
/******************/


/********************/
/* Package Typedefs */
/********************/


/********************/
/* Local Prototypes */
/********************/
/* Static function declarations */
static herr_t H5E__set_default_auto(H5E_t *stk);
static H5E_cls_t *H5E__register_class(const char *cls_name, const char *lib_name, const char *version);
static herr_t  H5E__unregister_class(H5E_cls_t *cls);
static ssize_t H5E__get_class_name(const H5E_cls_t *cls, char *name, size_t size);
static int H5E__close_msg_cb(void *obj_ptr, hid_t obj_id, void *udata);
static herr_t  H5E__close_msg(H5E_msg_t *err);
static H5E_msg_t *H5E__create_msg(H5E_cls_t *cls, H5E_type_t msg_type, const char *msg);
static H5E_t  *H5E__get_current_stack(void);
static herr_t  H5E__set_current_stack(H5E_t *estack);
static herr_t  H5E__close_stack(H5E_t *err_stack);
static ssize_t H5E__get_num(const H5E_t *err_stack);


/*********************/
/* Package Variables */
/*********************/

/* Package initialization variable */
hbool_t H5_PKG_INIT_VAR = FALSE;


/*****************************/
/* Library Private Variables */
/*****************************/


/*******************/
/* Local Variables */
/*******************/

/* Declare a free list to manage the H5E_t struct */
H5FL_DEFINE_STATIC(H5E_t);

/* Declare a free list to manage the H5E_cls_t struct */
H5FL_DEFINE_STATIC(H5E_cls_t);

/* Declare a free list to manage the H5E_msg_t struct */
H5FL_DEFINE_STATIC(H5E_msg_t);

/* Error class ID class */
static const H5I_class_t H5I_ERRCLS_CLS[1] = {{
    H5I_ERROR_CLASS,		/* ID class value */
    0,				/* Class flags */
    0,				/* # of reserved IDs for class */
    (H5I_free_t)H5E__unregister_class /* Callback routine for closing objects of this class */
}};

/* Error message ID class */
static const H5I_class_t H5I_ERRMSG_CLS[1] = {{
    H5I_ERROR_MSG,		/* ID class value */
    0,				/* Class flags */
    0,				/* # of reserved IDs for class */
    (H5I_free_t)H5E__close_msg   /* Callback routine for closing objects of this class */
}};

/* Error stack ID class */
static const H5I_class_t H5I_ERRSTK_CLS[1] = {{
    H5I_ERROR_STACK,		/* ID class value */
    0,				/* Class flags */
    0,				/* # of reserved IDs for class */
    (H5I_free_t)H5E__close_stack /* Callback routine for closing objects of this class */
}};



/*-------------------------------------------------------------------------
 * Function:    H5E_init
 *
 * Purpose:     Initialize the interface from some other layer.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Quincey Koziol
 *              Tuesday, June 29, 2004
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5E_init(void)
{
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_NOAPI(FAIL)
    /* FUNC_ENTER() does all the work */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E_init() */


/*--------------------------------------------------------------------------
 * Function:    H5E__init_package
 *
 * Purpose:     Initialize interface-specific information
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:  Raymond Lu
 *              Friday, July 11, 2003
 *
 *--------------------------------------------------------------------------
 */
herr_t
H5E__init_package(void)
{
    H5E_cls_t   *cls;           /* Pointer to error class */
    H5E_msg_t   *msg;           /* Pointer to new error message */
    char lib_vers[128];         /* Buffer to constructu library version within */
    herr_t ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_PACKAGE

    /* Initialize the atom group for the error class IDs */
    if(H5I_register_type(H5I_ERRCLS_CLS) < 0)
        HGOTO_ERROR(H5E_ATOM, H5E_CANTINIT, FAIL, "unable to initialize ID group")

    /* Initialize the atom group for the major error IDs */
    if(H5I_register_type(H5I_ERRMSG_CLS) < 0)
        HGOTO_ERROR(H5E_ATOM, H5E_CANTINIT, FAIL, "unable to initialize ID group")

    /* Initialize the atom group for the error stacks */
    if(H5I_register_type(H5I_ERRSTK_CLS) < 0)
        HGOTO_ERROR(H5E_ATOM, H5E_CANTINIT, FAIL, "unable to initialize ID group")

#ifndef H5_HAVE_THREADSAFE
    H5E_stack_g[0].nused = 0;
    H5E__set_default_auto(H5E_stack_g);
#endif /* H5_HAVE_THREADSAFE */

    /* Allocate the HDF5 error class */
    HDassert(H5E_ERR_CLS_g == (-1));
    HDsnprintf(lib_vers, sizeof(lib_vers), "%u.%u.%u%s", H5_VERS_MAJOR, H5_VERS_MINOR, H5_VERS_RELEASE, (HDstrlen(H5_VERS_SUBRELEASE) > 0 ? "-"H5_VERS_SUBRELEASE : ""));
    if(NULL == (cls = H5E__register_class(H5E_CLS_NAME, H5E_CLS_LIB_NAME, lib_vers)))
        HGOTO_ERROR(H5E_ERROR, H5E_CANTINIT, FAIL, "class initialization failed")
    if((H5E_ERR_CLS_g = H5I_register(H5I_ERROR_CLASS, cls, FALSE)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, FAIL, "can't register error class")

    /* Include the automatically generated error code initialization */
    #include "H5Einit.h"

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__init_package() */


/*-------------------------------------------------------------------------
 * Function:    H5E_term_package
 *
 * Purpose:     Terminates the H5E interface
 *
 * Return:      Success:    Positive if anything is done that might
 *                          affect other interfaces; zero otherwise.
 *
 *              Failure:    Negative
 *
 * Programmer:	Raymond Lu
 *	        Tuesday, July 22, 2003
 *
 *-------------------------------------------------------------------------
 */
int
H5E_term_package(void)
{
    int	n = 0;

    FUNC_ENTER_NOAPI_NOINIT_NOERR

    if(H5_PKG_INIT_VAR) {
        int64_t ncls, nmsg, nstk;

        /* Check if there are any open error stacks, classes or messages */
        ncls = H5I_nmembers(H5I_ERROR_CLASS);
        nmsg = H5I_nmembers(H5I_ERROR_MSG);
        nstk = H5I_nmembers(H5I_ERROR_STACK);

        if((ncls + nmsg + nstk) > 0) {
            /* Clear any outstanding error stacks */
            if(nstk > 0)
	        (void)H5I_clear_type(H5I_ERROR_STACK, FALSE, FALSE);

            /* Clear all the error classes */
            if(ncls > 0) {
                (void)H5I_clear_type(H5I_ERROR_CLASS, FALSE, FALSE);

                /* Reset the HDF5 error class, if its been closed */
                if(H5I_nmembers(H5I_ERROR_CLASS) == 0)
                    H5E_ERR_CLS_g = -1;
            } /* end if */

            /* Clear all the error messages */
            if(nmsg > 0) {
                (void)H5I_clear_type(H5I_ERROR_MSG, FALSE, FALSE);

                /* Reset the HDF5 error messages, if they've been closed */
                if(H5I_nmembers(H5I_ERROR_MSG) == 0) {
                    /* Include the automatically generated error code termination */
                    #include "H5Eterm.h"
                } /* end if */
            } /* end if */

            n++; /*H5I*/
        } /* end if */
        else {
            /* Destroy the error class, message, and stack id groups */
            n += (H5I_dec_type_ref(H5I_ERROR_STACK) > 0);
            n += (H5I_dec_type_ref(H5I_ERROR_CLASS) > 0);
            n += (H5I_dec_type_ref(H5I_ERROR_MSG) > 0);

            /* Mark closed */
            if(0 == n)
                H5_PKG_INIT_VAR = FALSE;
        } /* end else */
    } /* end if */

    FUNC_LEAVE_NOAPI(n)
} /* end H5E_term_package() */


/*--------------------------------------------------------------------------
 * Function:    H5E__set_default_auto
 *
 * Purpose:     Initialize "automatic" error stack reporting info to library
 *              default
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:  Quincey Koziol
 *              Thursday, November 1, 2007
 *
 *--------------------------------------------------------------------------
 */
static herr_t
H5E__set_default_auto(H5E_t *stk)
{
    FUNC_ENTER_STATIC_NOERR

#ifndef H5_NO_DEPRECATED_SYMBOLS
#ifdef H5_USE_16_API_DEFAULT
    stk->auto_op.vers = 1;
#else /* H5_USE_16_API */
    stk->auto_op.vers = 2;
#endif /* H5_USE_16_API_DEFAULT */

    stk->auto_op.func1 = stk->auto_op.func1_default = (H5E_auto1_t)H5Eprint1;
    stk->auto_op.func2 = stk->auto_op.func2_default = (H5E_auto2_t)H5Eprint2;
    stk->auto_op.is_default = TRUE;
#else /* H5_NO_DEPRECATED_SYMBOLS */
    stk->auto_op.func2 = (H5E_auto2_t)H5Eprint2;
#endif /* H5_NO_DEPRECATED_SYMBOLS */

    stk->auto_data = NULL;

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5E__set_default_auto() */


#ifdef H5_HAVE_THREADSAFE
/*-------------------------------------------------------------------------
 * Function:    H5E__get_stack
 *
 * Purpose:     Support function for H5E__get_my_stack() to initialize and
 *              acquire per-thread error stack.
 *
 * Return:      Success:    Pointer to an error stack struct (H5E_t *)
 *
 *              Failure:    NULL
 *
 * Programmer:	Chee Wai LEE
 *              April 24, 2000
 *
 *-------------------------------------------------------------------------
 */
H5E_t *
H5E__get_stack(void)
{
    H5E_t *estack = NULL;

    FUNC_ENTER_PACKAGE_NOERR

    estack = (H5E_t *)H5TS_get_thread_local_value(H5TS_errstk_key_g);

    if(!estack) {
        /* No associated value with current thread - create one */
#ifdef H5_HAVE_WIN_THREADS
        /* Win32 has to use LocalAlloc to match the LocalFree in DllMain */
        estack = (H5E_t *)LocalAlloc(LPTR, sizeof(H5E_t));
#else
        /* Use HDmalloc here since this has to match the HDfree in the
         * destructor and we want to avoid the codestack there.
         */
        estack = (H5E_t *)HDmalloc(sizeof(H5E_t));
#endif /* H5_HAVE_WIN_THREADS */
        HDassert(estack);

        /* Set the thread-specific info */
        estack->nused = 0;
        H5E__set_default_auto(estack);

        /* (It's not necessary to release this in this API, it is
         *      released by the "key destructor" set up in the H5TS
         *      routines.  See calls to pthread_key_create() in H5TS.c -QAK)
         */
        H5TS_set_thread_local_value(H5TS_errstk_key_g, (void *)estack);
    } /* end if */

    /* Set return value */
    FUNC_LEAVE_NOAPI(estack)
} /* end H5E__get_stack() */
#endif  /* H5_HAVE_THREADSAFE */


/*-------------------------------------------------------------------------
 * Function:    H5E__free_class
 *
 * Purpose:     Private function to free an error class.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Quincey Koziol
 *              Friday, January 22, 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E__free_class(H5E_cls_t *cls)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check arguments */
    HDassert(cls);

    /* Free error class structure */
    cls->cls_name = (char *)H5MM_xfree((void*)cls->cls_name);
    cls->lib_name = (char *)H5MM_xfree((void*)cls->lib_name);
    cls->lib_vers = (char *)H5MM_xfree((void*)cls->lib_vers);
    cls = H5FL_FREE(H5E_cls_t, cls);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5E__free_class() */


/*-------------------------------------------------------------------------
 * Function:    H5Eregister_class
 *
 * Purpose:     Registers an error class.
 *
 * Return:      Success:    An ID for the error class
 *              Failure:    H5I_INVALID_HID
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Eregister_class(const char *cls_name, const char *lib_name, const char *version)
{
    H5E_cls_t   *cls;        /* Pointer to error class */
    hid_t       ret_value = H5I_INVALID_HID;   /* Return value */

    FUNC_ENTER_API(H5I_INVALID_HID)
    H5TRACE3("i", "*s*s*s", cls_name, lib_name, version);

    /* Check arguments */
    if(cls_name == NULL || lib_name == NULL || version == NULL)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid string")

    /* Create the new error class object */
    if(NULL == (cls = H5E__register_class(cls_name, lib_name, version)))
        HGOTO_ERROR(H5E_ERROR, H5E_CANTCREATE, H5I_INVALID_HID, "can't create error class")

    /* Register the new error class to get an ID for it */
    if((ret_value = H5I_register(H5I_ERROR_CLASS, cls, TRUE)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register error class")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eregister_class() */


/*-------------------------------------------------------------------------
 * Function:    H5E__register_class
 *
 * Purpose:     Private function to register an error class.
 *
 * Return:      Success:    Pointer to an error class struct
 *              Failure:    NULL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
static H5E_cls_t *
H5E__register_class(const char *cls_name, const char *lib_name, const char *version)
{
    H5E_cls_t   *cls = NULL;            /* Pointer to error class */
    H5E_cls_t   *ret_value = NULL;      /* Return value */

    FUNC_ENTER_STATIC

    /* Check arguments */
    HDassert(cls_name);
    HDassert(lib_name);
    HDassert(version);

    /* Allocate space for new error class */
    if(NULL == (cls = H5FL_CALLOC(H5E_cls_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Duplicate string information */
    if(NULL == (cls->cls_name = H5MM_xstrdup(cls_name)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
    if(NULL == (cls->lib_name = H5MM_xstrdup(lib_name)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
    if(NULL == (cls->lib_vers = H5MM_xstrdup(version)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Set the return value */
    ret_value = cls;

done:
    if(!ret_value)
        if(cls && H5E__free_class(cls) < 0)
            HDONE_ERROR(H5E_ERROR, H5E_CANTRELEASE, NULL, "unable to free error class")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__register_class() */


/*-------------------------------------------------------------------------
 * Function:    H5Eunregister_class
 *
 * Purpose:     Closes an error class.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:  Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eunregister_class(hid_t class_id)
{
    herr_t       ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE1("e", "i", class_id);

    /* Check arguments */
    if(H5I_ERROR_CLASS != H5I_get_type(class_id))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an error class")

    /*
     * Decrement the counter on the dataset.  It will be freed if the count
     * reaches zero.
     */
    if(H5I_dec_app_ref(class_id) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error class")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eunregister_class() */


/*-------------------------------------------------------------------------
 * Function:    H5E__unregister_class
 *
 * Purpose:     Private function to close an error class.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E__unregister_class(H5E_cls_t *cls)
{
    herr_t      ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_STATIC

    /* Check arguments */
    HDassert(cls);

    /* Iterate over all the messages and delete those in this error class */
    if(H5I_iterate(H5I_ERROR_MSG, H5E__close_msg_cb, cls, FALSE) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_BADITER, FAIL, "unable to free all messages in this error class")

    /* Free error class structure */
    if(H5E__free_class(cls) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTRELEASE, FAIL, "unable to free error class")

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__unregister_class() */


/*-------------------------------------------------------------------------
 * Function:    H5Eget_class_name
 *
 * Purpose:     Retrieves error class name.
 *
 * Return:      Success:    Name length (zero means no name)
 *              Failure:    -1
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
ssize_t
H5Eget_class_name(hid_t class_id, char *name, size_t size)
{
    H5E_cls_t   *cls;        /* Pointer to error class */
    ssize_t     ret_value = -1;   /* Return value */

    FUNC_ENTER_API((-1))
    H5TRACE3("Zs", "i*sz", class_id, name, size);

    /* Get the error class */
    if(NULL == (cls = (H5E_cls_t *)H5I_object_verify(class_id, H5I_ERROR_CLASS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, (-1), "not a error class ID")

    /* Retrieve the class name */
    if((ret_value = H5E__get_class_name(cls, name, size)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, (-1), "can't get error class name")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eget_class_name() */


/*-------------------------------------------------------------------------
 * Function:    H5E__get_class_name
 *
 * Purpose:     Private function to retrieve error class name.
 *
 * Return:      Success:    Name length (zero means no name)
 *              Failure:    -1
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
static ssize_t
H5E__get_class_name(const H5E_cls_t *cls, char *name, size_t size)
{
    ssize_t       len = -1;          /* Length of error class's name */

    FUNC_ENTER_STATIC_NOERR

    /* Check arguments */
    HDassert(cls);

    /* Get the class's name */
    len = (ssize_t)HDstrlen(cls->cls_name);

    /* Set the user's buffer, if provided */
    if(name) {
       HDstrncpy(name, cls->cls_name, MIN((size_t)(len + 1), size));
       if((size_t)len >= size)
          name[size - 1] = '\0';
    } /* end if */

    /* Return the full length */
    FUNC_LEAVE_NOAPI(len)
} /* end H5E__get_class_name() */


/*-------------------------------------------------------------------------
 * Function:    H5E__close_msg_cb
 *
 * Purpose:     H5I_iterate callback function to close error messages in the
 *              error class.
 *
 * Return:      Success:    H5_ITER_CONT (0)
 *              Failure:    H5_ITER_ERROR (-1)
 *
 * Programmer:  Raymond Lu
 *              July 14, 2003
 *
 *-------------------------------------------------------------------------
 */
static int
H5E__close_msg_cb(void *obj_ptr, hid_t obj_id, void *udata)
{
    H5E_msg_t   *err_msg = (H5E_msg_t*)obj_ptr;
    H5E_cls_t   *cls = (H5E_cls_t*)udata;
    int         ret_value = H5_ITER_CONT;       /* Return value */

    FUNC_ENTER_STATIC

    /* Check arguments */
    HDassert(err_msg);

    /* Close the message if it is in the class being closed */
    if(err_msg->cls == cls) {
        if(H5E__close_msg(err_msg) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTCLOSEOBJ, H5_ITER_ERROR, "unable to close error message")
        if(NULL == H5I_remove(obj_id))
            HGOTO_ERROR(H5E_ERROR, H5E_CANTREMOVE, H5_ITER_ERROR, "unable to remove error message")
    } /* end if */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__close_msg_cb() */


/*-------------------------------------------------------------------------
 * Function:    H5Eclose_msg
 *
 * Purpose:     Closes a major or minor error.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eclose_msg(hid_t err_id)
{
    herr_t       ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE1("e", "i", err_id);

    /* Check arguments */
    if(H5I_ERROR_MSG != H5I_get_type(err_id))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an error class")

    /* Decrement the counter.  It will be freed if the count reaches zero. */
    if(H5I_dec_app_ref(err_id) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error message")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eclose_msg() */


/*-------------------------------------------------------------------------
 * Function:    H5E__close_msg
 *
 * Purpose:     Private function to close an error messge.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E__close_msg(H5E_msg_t *err)
{
    FUNC_ENTER_STATIC_NOERR

    /* Check arguments */
    HDassert(err);

    /* Release message */
    err->msg = (char *)H5MM_xfree((void *)err->msg);
    /* Don't free err->cls here */
    err = H5FL_FREE(H5E_msg_t, err);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5E__close_msg() */


/*-------------------------------------------------------------------------
 * Function:    H5Ecreate_msg
 *
 * Purpose:     Creates a major or minor error, returns an ID.
 *
 * Return:      Success:    An error ID
 *              Failure:    H5I_INVALID_HID
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Ecreate_msg(hid_t class_id, H5E_type_t msg_type, const char *msg_str)
{
    H5E_cls_t   *cls;           /* Pointer to error class */
    H5E_msg_t   *msg;           /* Pointer to new error message */
    hid_t       ret_value = H5I_INVALID_HID;      /* Return value */

    FUNC_ENTER_API(H5I_INVALID_HID)
    H5TRACE3("i", "iEt*s", class_id, msg_type, msg_str);

    /* Check arguments */
    if(msg_type != H5E_MAJOR && msg_type != H5E_MINOR)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "not a valid message type")
    if(msg_str == NULL)
        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "message is NULL")

    /* Get the error class */
    if(NULL == (cls = (H5E_cls_t *)H5I_object_verify(class_id, H5I_ERROR_CLASS)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not an error class ID")

    /* Create the new error message object */
    if(NULL == (msg = H5E__create_msg(cls, msg_type, msg_str)))
        HGOTO_ERROR(H5E_ERROR, H5E_CANTCREATE, H5I_INVALID_HID, "can't create error message")

    /* Register the new error class to get an ID for it */
    if((ret_value = H5I_register(H5I_ERROR_MSG, msg, TRUE)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register error message")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Ecreate_msg() */

/*-------------------------------------------------------------------------
 * Function:    H5E__create_msg
 *
 * Purpose:     Private function to create a major or minor error.
 *
 * Return:      Success:    Pointer to a message struct
 *              Failure:    NULL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
static H5E_msg_t *
H5E__create_msg(H5E_cls_t *cls, H5E_type_t msg_type, const char *msg_str)
{
    H5E_msg_t   *msg = NULL;            /* Pointer to new error message */
    H5E_msg_t   *ret_value = NULL;      /* Return value */

    FUNC_ENTER_STATIC

    /* Check arguments */
    HDassert(cls);
    HDassert(msg_type == H5E_MAJOR || msg_type == H5E_MINOR);
    HDassert(msg_str);

    /* Allocate new message object */
    if(NULL == (msg = H5FL_MALLOC(H5E_msg_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Fill new message object */
    msg->cls = cls;
    msg->type = msg_type;
    if(NULL == (msg->msg = H5MM_xstrdup(msg_str)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Set return value */
    ret_value = msg;

done:
    if(!ret_value)
        if(msg && H5E__close_msg(msg) < 0)
            HDONE_ERROR(H5E_ERROR, H5E_CANTCLOSEOBJ, NULL, "unable to close error message")

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__create_msg() */


/*-------------------------------------------------------------------------
 * Function:    H5Eget_msg
 *
 * Purpose:     Retrieves an error message.
 *
 * Return:      Success:    Message length (zero means no message)
 *              Failure:    -1
 *
 * Programmer:	Raymond Lu
 *              Friday, July 14, 2003
 *
 *-------------------------------------------------------------------------
 */
ssize_t
H5Eget_msg(hid_t msg_id, H5E_type_t *type, char *msg_str, size_t size)
{
    H5E_msg_t   *msg;           /* Pointer to error message */
    ssize_t      ret_value = -1;     /* Return value */

    FUNC_ENTER_API_NOCLEAR((-1))
    H5TRACE4("Zs", "i*Et*sz", msg_id, type, msg_str, size);

    /* Get the message object */
    if(NULL == (msg = (H5E_msg_t *)H5I_object_verify(msg_id, H5I_ERROR_MSG)))
        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, (-1), "not a error message ID")

    /* Get the message's text */
    if((ret_value = H5E__get_msg(msg, type, msg_str, size)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, (-1), "can't get error message text")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eget_msg() */


/*-------------------------------------------------------------------------
 * Function:    H5Ecreate_stack
 *
 * Purpose:     Creates a new, empty, error stack.
 *
 * Return:      Success:    An error stack ID
 *              Failure:    H5I_INVALID_HID
 *
 * Programmer:	Quincey Koziol
 *              Thursday, November 1, 2007
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Ecreate_stack(void)
{
    H5E_t	*stk;           /* Error stack */
    hid_t       ret_value = H5I_INVALID_HID;      /* Return value */

    FUNC_ENTER_API(H5I_INVALID_HID)
    H5TRACE0("i","");

    /* Allocate a new error stack */
    if(NULL == (stk = H5FL_CALLOC(H5E_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5I_INVALID_HID, "memory allocation failed")

    /* Set the "automatic" error reporting info to the library default */
    H5E__set_default_auto(stk);

    /* Register the stack */
    if((ret_value = H5I_register(H5I_ERROR_STACK, stk, TRUE)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, H5I_INVALID_HID, "can't create error stack")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Ecreate_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5Eget_current_stack
 *
 * Purpose:     Registers current error stack, returns object handle for it,
 *              clears it.
 *
 * Return:      Success:    An error stack ID
 *              Failure:    H5I_INVALID_HID
 *
 * Programmer:	Raymond Lu
 *              Friday, July 14, 2003
 *
 *-------------------------------------------------------------------------
 */
hid_t
H5Eget_current_stack(void)
{
    H5E_t	*stk;           /* Error stack */
    hid_t       ret_value = H5I_INVALID_HID;   /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(H5I_INVALID_HID)
    H5TRACE0("i","");

    /* Get the current stack */
    if(NULL == (stk = H5E__get_current_stack()))
        HGOTO_ERROR(H5E_ERROR, H5E_CANTCREATE, H5I_INVALID_HID, "can't create error stack")

    /* Register the stack */
    if((ret_value = H5I_register(H5I_ERROR_STACK, stk, TRUE)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTREGISTER, H5I_INVALID_HID, "can't create error stack")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eget_current_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5E__get_current_stack
 *
 * Purpose:     Private function to register an error stack.
 *
 * Return:      Success:    Pointer to an error class struct
 *              Failure:    NULL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 11, 2003
 *
 *-------------------------------------------------------------------------
 */
static H5E_t *
H5E__get_current_stack(void)
{
    H5E_t	*current_stack;         /* Pointer to the current error stack */
    H5E_t	*estack_copy = NULL;    /* Pointer to new error stack to return */
    unsigned    u;                      /* Local index variable */
    H5E_t      *ret_value = NULL;       /* Return value */

    FUNC_ENTER_STATIC

    /* Get a pointer to the current error stack */
    if(NULL == (current_stack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
	HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, NULL, "can't get current error stack")

    /* Allocate a new error stack */
    if(NULL == (estack_copy = H5FL_CALLOC(H5E_t)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")

    /* Make a copy of current error stack */
    estack_copy->nused = current_stack->nused;
    for(u = 0; u < current_stack->nused; u++) {
        H5E_error2_t *current_error, *new_error; /* Pointers to errors on each stack */

        /* Get pointers into the current error stack location */
        current_error = &(current_stack->slot[u]);
        new_error = &(estack_copy->slot[u]);

        /* Increment the IDs to indicate that they are used in this stack */
        if(H5I_inc_ref(current_error->cls_id, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTINC, NULL, "unable to increment ref count on error class")
        new_error->cls_id = current_error->cls_id;
        if(H5I_inc_ref(current_error->maj_num, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTINC, NULL, "unable to increment ref count on error message")
        new_error->maj_num = current_error->maj_num;
        if(H5I_inc_ref(current_error->min_num, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTINC, NULL, "unable to increment ref count on error message")
        new_error->min_num = current_error->min_num;
        if(NULL == (new_error->func_name = H5MM_xstrdup(current_error->func_name)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
        if(NULL == (new_error->file_name = H5MM_xstrdup(current_error->file_name)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
        new_error->line = current_error->line;
        if(NULL == (new_error->desc = H5MM_xstrdup(current_error->desc)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
    } /* end for */

    /* Copy the "automatic" error reporting information */
    estack_copy->auto_op = current_stack->auto_op;
    estack_copy->auto_data = current_stack->auto_data;

    /* Empty current error stack */
    H5E_clear_stack(current_stack);

    /* Set the return value */
    ret_value = estack_copy;

done:
    if(ret_value == NULL)
        if(estack_copy)
            estack_copy = H5FL_FREE(H5E_t, estack_copy);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__get_current_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5Eset_current_stack
 *
 * Purpose:     Replaces current stack with specified stack. This closes the
 *              stack ID also.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:  Raymond Lu
 *              Friday, July 15, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eset_current_stack(hid_t err_stack)
{
    H5E_t *estack;
    herr_t ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE1("e", "i", err_stack);

    if(err_stack != H5E_DEFAULT) {
        if(NULL == (estack = (H5E_t *)H5I_object_verify(err_stack, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")

        /* Set the current error stack */
        if(H5E__set_current_stack(estack) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "unable to set error stack")

        /*
         * Decrement the counter on the error stack.  It will be freed if the count
         * reaches zero.
         */
        if(H5I_dec_app_ref(err_stack) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error stack")
    } /* end if */

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eset_current_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5E__set_current_stack
 *
 * Purpose:     Private function to replace an error stack.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 15, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E__set_current_stack(H5E_t *estack)
{
    H5E_t	*current_stack;         /* Default error stack */
    unsigned     u;                     /* Local index variable */
    herr_t       ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_STATIC

    /* Sanity check */
    HDassert(estack);

    /* Get a pointer to the current error stack */
    if(NULL == (current_stack = H5E__get_my_stack ())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
	HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")

    /* Empty current error stack */
    H5E_clear_stack(current_stack);

    /* Copy new stack to current error stack */
    current_stack->nused = estack->nused;
    for(u = 0; u < current_stack->nused; u++) {
        H5E_error2_t *current_error, *new_error; /* Pointers to errors on each stack */

        /* Get pointers into the current error stack location */
        current_error = &(current_stack->slot[u]);
        new_error = &(estack->slot[u]);

        /* Increment the IDs to indicate that they are used in this stack */
        if(H5I_inc_ref(new_error->cls_id, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTINC, FAIL, "unable to increment ref count on error class")
        current_error->cls_id = new_error->cls_id;
        if(H5I_inc_ref(new_error->maj_num, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTINC, FAIL, "unable to increment ref count on error class")
        current_error->maj_num = new_error->maj_num;
        if(H5I_inc_ref(new_error->min_num, FALSE) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTINC, FAIL, "unable to increment ref count on error class")
        current_error->min_num = new_error->min_num;
        if(NULL == (current_error->func_name = H5MM_xstrdup(new_error->func_name)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
        if(NULL == (current_error->file_name = H5MM_xstrdup(new_error->file_name)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
        current_error->line = new_error->line;
        if(NULL == (current_error->desc = H5MM_xstrdup(new_error->desc)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
    } /* end for */

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5E__set_current_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5Eclose_stack
 *
 * Purpose:     Closes an error stack.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:  Raymond Lu
 *              Friday, July 14, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eclose_stack(hid_t stack_id)
{
    herr_t       ret_value = SUCCEED;   /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE1("e", "i", stack_id);

    if(H5E_DEFAULT != stack_id) {
        /* Check arguments */
        if(H5I_ERROR_STACK != H5I_get_type(stack_id))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")

        /*
         * Decrement the counter on the error stack.  It will be freed if the count
         * reaches zero.
         */
        if(H5I_dec_app_ref(stack_id) < 0)
            HGOTO_ERROR(H5E_ERROR, H5E_CANTDEC, FAIL, "unable to decrement ref count on error stack")
    } /* end if */

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eclose_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5E__close_stack
 *
 * Purpose:     Private function to close an error stack.
 *
 * Return:      SUCCEED/FAIL
 *
 * Programmer:	Raymond Lu
 *              Friday, July 14, 2003
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5E__close_stack(H5E_t *estack)
{
    FUNC_ENTER_STATIC_NOERR

    /* Sanity check */
    HDassert(estack);

    /* Release the stack's error information */
    H5E_clear_stack(estack);

    /* Free the stack structure */
    estack = H5FL_FREE(H5E_t, estack);

    FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5E__close_stack() */


/*-------------------------------------------------------------------------
 * Function:    H5Eget_num
 *
 * Purpose:     Retrieves the number of error messages.
 *
 * Return:      Success:    The number of errors
 *              Failure:    -1
 *
 * Programmer:	Raymond Lu
 *              Friday, July 15, 2003
 *
 *-------------------------------------------------------------------------
 */
ssize_t
H5Eget_num(hid_t error_stack_id)
{
    H5E_t *estack;         /* Error stack to operate on */
    ssize_t ret_value;      /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR((-1))
    H5TRACE1("Zs", "i", error_stack_id);

    /* Need to check for errors */
    if(error_stack_id == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, (-1), "can't get current error stack")
    } /* end if */
    else {
        /* Only clear the error stack if it's not the default stack */
        H5E_clear_stack(NULL);

        /* Get the error stack to operate on */
        if(NULL == (estack = (H5E_t *)H5I_object_verify(error_stack_id, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, (-1), "not an error stack ID")
    } /* end else */

    /* Get the number of errors on stack */
    if((ret_value = H5E__get_num(estack)) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, (-1), "can't get number of errors")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eget_num() */


/*-------------------------------------------------------------------------
 * Function:    H5E__get_num
 *
 * Purpose:     Private function to retrieve number of errors in error stack.
 *
 * Return:      Success:    The number of errors
 *              Failure:    -1 (can't fail at this time)
 *
 * Programmer:	Raymond Lu
 *              Friday, July 15, 2003
 *
 *-------------------------------------------------------------------------
 */
static ssize_t
H5E__get_num(const H5E_t *estack)
{
    FUNC_ENTER_STATIC_NOERR

    HDassert(estack);

    FUNC_LEAVE_NOAPI((ssize_t)estack->nused)
} /* end H5E__get_num() */


/*-------------------------------------------------------------------------
 * Function:    H5Epop
 *
 * Purpose:     Deletes some error messages from the top of error stack.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:  Raymond Lu
 *              Friday, July 16, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Epop(hid_t err_stack, size_t count)
{
    H5E_t *estack;
    herr_t ret_value = SUCCEED;   /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(FAIL)
    H5TRACE2("e", "iz", err_stack, count);

    /* Need to check for errors */
    if(err_stack == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")
    } /* end if */
    else {
        /* Only clear the error stack if it's not the default stack */
        H5E_clear_stack(NULL);

        /* Get the error stack to operate on */
        if(NULL == (estack = (H5E_t *)H5I_object_verify(err_stack, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")
    } /* end else */

    /* Range limit the number of errors to pop off stack */
    if(count > estack->nused)
        count = estack->nused;

    /* Pop the errors off the stack */
    if(H5E__pop(estack, count) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTRELEASE, FAIL, "can't pop errors from stack")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Epop() */


/*-------------------------------------------------------------------------
 * Function:    H5Epush2
 *
 * Purpose:     Pushes a new error record onto error stack for the current
 *              thread. The error has major and minor IDs MAJ_ID and
 *              MIN_ID, the name of a function where the error was detected,
 *              the name of the file where the error was detected, the
 *              line within that file, and an error description string.  The
 *              function name, file name, and error description strings must
 *              be statically allocated.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Quincey Koziol
 *		Monday, October 18, 1999
 *
 * Notes:       Basically a new public API wrapper around the H5E__push_stack
 *              function.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Epush2(hid_t err_stack, const char *file, const char *func, unsigned line,
        hid_t cls_id, hid_t maj_id, hid_t min_id, const char *fmt, ...)
{
    va_list     ap;             /* Varargs info */
    H5E_t       *estack;        /* Pointer to error stack to modify */
#ifndef H5_HAVE_VASPRINTF
    int         tmp_len;        /* Current size of description buffer */
    int         desc_len;       /* Actual length of description when formatted */
#endif /* H5_HAVE_VASPRINTF */
    char        *tmp = NULL;      /* Buffer to place formatted description in */
    hbool_t     va_started = FALSE; /* Whether the variable argument list is open */
    herr_t	ret_value=SUCCEED;      /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(FAIL)
    H5TRACE8("e", "i*s*sIuiii*s", err_stack, file, func, line, cls_id, maj_id,
             min_id, fmt);

    if(err_stack == H5E_DEFAULT)
    	estack = NULL;
    else {
        /* Only clear the error stack if it's not the default stack */
        H5E_clear_stack(NULL);

        /* Get the error stack to operate on */
        if(NULL == (estack = (H5E_t *)H5I_object_verify(err_stack, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")
    } /* end else */

/* Note that the variable-argument parsing for the format is identical in
 *      the H5E_printf_stack() routine - correct errors and make changes in both
 *      places. -QAK
 */

    /* Format the description */
    HDva_start(ap, fmt);
    va_started = TRUE;

#ifdef H5_HAVE_VASPRINTF
    /* Use the vasprintf() routine, since it does what we're trying to do below */
    if(HDvasprintf(&tmp, fmt, ap) < 0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
#else /* H5_HAVE_VASPRINTF */
    /* Allocate space for the formatted description buffer */
    tmp_len = 128;
    if(NULL == (tmp = H5MM_malloc((size_t)tmp_len)))
        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")

    /* If the description doesn't fit into the initial buffer size, allocate more space and try again */
    while((desc_len = HDvsnprintf(tmp, (size_t)tmp_len, fmt, ap)) > (tmp_len - 1)) {
        /* shutdown & restart the va_list */
        HDva_end(ap);
        HDva_start(ap, fmt);

        /* Release the previous description, it's too small */
        H5MM_xfree(tmp);

        /* Allocate a description of the appropriate length */
        tmp_len = desc_len + 1;
        if(NULL == (tmp = H5MM_malloc((size_t)tmp_len)))
            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
    } /* end while */
#endif /* H5_HAVE_VASPRINTF */

    /* Push the error on the stack */
    if(H5E__push_stack(estack, file, func, line, cls_id, maj_id, min_id, tmp) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "can't push error on stack")

done:
    if(va_started)
        HDva_end(ap);
#ifdef H5_HAVE_VASPRINTF
    /* Memory was allocated with HDvasprintf so it needs to be freed
     * with HDfree
     */
    if(tmp)
        HDfree(tmp);
#else /* H5_HAVE_VASPRINTF */
    if(tmp)
        H5MM_xfree(tmp);
#endif /* H5_HAVE_VASPRINTF */

    FUNC_LEAVE_API(ret_value)
} /* end H5Epush2() */


/*-------------------------------------------------------------------------
 * Function:    H5Eclear2
 *
 * Purpose:     Clears the error stack for the specified error stack.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Raymond Lu
 *              Wednesday, July 16, 2003
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eclear2(hid_t err_stack)
{
    H5E_t   *estack;            /* Error stack to operate on */
    herr_t ret_value = SUCCEED;   /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(FAIL)
    H5TRACE1("e", "i", err_stack);

    /* Need to check for errors */
    if(err_stack == H5E_DEFAULT)
    	estack = NULL;
    else {
        /* Only clear the error stack if it's not the default stack */
        H5E_clear_stack(NULL);

        if(NULL == (estack = (H5E_t *)H5I_object_verify(err_stack, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")
    } /* end else */

    /* Clear the error stack */
    if(H5E_clear_stack(estack) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "can't clear error stack")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eclear2() */


/*-------------------------------------------------------------------------
 * Function:    H5Eprint2
 *
 * Purpose:     Prints the error stack in some default way. This is just a
 *              convenience function for H5Ewalk() with a function that
 *              prints error messages. Users are encouraged to write their
 *              own more specific error handlers.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Robb Matzke
 *              Friday, February 27, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eprint2(hid_t err_stack, FILE *stream)
{
    H5E_t   *estack;            /* Error stack to operate on */
    herr_t ret_value = SUCCEED;   /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(FAIL)
    /*NO TRACE*/

    /* Need to check for errors */
    if(err_stack == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")
    } /* end if */
    else {
        /* Only clear the error stack if it's not the default stack */
        H5E_clear_stack(NULL);

        if(NULL == (estack = (H5E_t *)H5I_object_verify(err_stack, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")
    } /* end else */

    /* Print error stack */
    if(H5E__print(estack, stream, FALSE) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTLIST, FAIL, "can't display error stack")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eprint2() */


/*-------------------------------------------------------------------------
 * Function:    H5Ewalk2
 *
 * Purpose:     Walks the error stack for the current thread and calls some
 *              function for each error along the way.
 *
 * Return:      Non-negative on success/Negative on failure
 *
 * Programmer:  Robb Matzke
 *              Friday, February 27, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Ewalk2(hid_t err_stack, H5E_direction_t direction, H5E_walk2_t stack_func, void *client_data)
{
    H5E_t *estack;                      /* Error stack to operate on */
    H5E_walk_op_t op;                   /* Operator for walking error stack */
    herr_t ret_value = SUCCEED;         /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(FAIL)
    /*NO TRACE*/

    /* Need to check for errors */
    if(err_stack == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")
    } /* end if */
    else {
        /* Only clear the error stack if it's not the default stack */
        H5E_clear_stack(NULL);

        if(NULL == (estack = (H5E_t *)H5I_object_verify(err_stack, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")
    } /* end else */

    /* Walk the error stack */
    op.vers = 2;
    op.u.func2 = stack_func;
    if((ret_value = H5E__walk(estack, direction, &op, client_data)) < 0)
        HERROR(H5E_ERROR, H5E_CANTLIST, "can't walk error stack");

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Ewalk2() */


/*-------------------------------------------------------------------------
 * Function:    H5Eget_auto2
 *
 * Purpose:     Returns the current settings for the automatic error stack
 *              traversal function and its data for specific error stack.
 *              Either (or both) arguments may be null in which case the
 *              value is not returned.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Saturday, February 28, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eget_auto2(hid_t estack_id, H5E_auto2_t *func, void **client_data)
{
    H5E_t   *estack;            /* Error stack to operate on */
    H5E_auto_op_t op;           /* Error stack function */
    herr_t ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE3("e", "i*x**x", estack_id, func, client_data);

    if(estack_id == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")
    } /* end if */
    else
        if(NULL == (estack = (H5E_t *)H5I_object_verify(estack_id, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")

    /* Get the automatic error reporting information */
    if(H5E__get_auto(estack, &op, client_data) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get automatic error info")

#ifndef H5_NO_DEPRECATED_SYMBOLS
    /* Fail if the printing function isn't the default(user-set) and set through H5Eset_auto1 */
    if(!op.is_default && op.vers == 1)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "wrong API function, H5Eset_auto1 has been called")
#endif /* H5_NO_DEPRECATED_SYMBOLS */

    if(func)
        *func = op.func2;

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eget_auto2() */


/*-------------------------------------------------------------------------
 * Function:    H5Eset_auto2
 *
 * Purpose:     Turns on or off automatic printing of errors for certain
 *              error stack.  When turned on (non-null FUNC pointer) any
 *              API function which returns an error indication will first
 *              call FUNC passing it CLIENT_DATA as an argument.
 *
 *              The default values before this function is called are
 *              H5Eprint2() with client data being the standard error stream,
 *              stderr.
 *
 *              Automatic stack traversal is always in the H5E_WALK_DOWNWARD
 *              direction.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:	Robb Matzke
 *              Friday, February 27, 1998
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eset_auto2(hid_t estack_id, H5E_auto2_t func, void *client_data)
{
    H5E_t   *estack;            /* Error stack to operate on */
    H5E_auto_op_t op;           /* Error stack operator */
    herr_t ret_value = SUCCEED; /* Return value */

    /* Don't clear the error stack! :-) */
    FUNC_ENTER_API_NOCLEAR(FAIL)
    H5TRACE3("e", "ix*x", estack_id, func, client_data);

    if(estack_id == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")
    } /* end if */
    else
        if(NULL == (estack = (H5E_t *)H5I_object_verify(estack_id, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")

#ifndef H5_NO_DEPRECATED_SYMBOLS
    /* Get the automatic error reporting information */
    if(H5E__get_auto(estack, &op, NULL) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get automatic error info")

    /* Set the automatic error reporting information */
    if(func != op.func2_default)
        op.is_default = FALSE;
    else
        op.is_default = TRUE;

    op.vers = 2;
#endif /* H5_NO_DEPRECATED_SYMBOLS */

    /* Set the automatic error reporting function */
    op.func2 = func;

    if(H5E__set_auto(estack, &op, client_data) < 0)
        HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "can't set automatic error info")

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eset_auto2() */


/*-------------------------------------------------------------------------
 * Function:    H5Eauto_is_v2
 *
 * Purpose:     Determines if the error auto reporting function for an
 *              error stack conforms to the H5E_auto_stack_t typedef
 *              or the H5E_auto_t typedef.  The IS_STACK parameter is set
 *              to 1 for the first case and 0 for the latter case.
 *
 * Return:      Non-negative value on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *              Wednesday, September  8, 2004
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5Eauto_is_v2(hid_t estack_id, unsigned *is_stack)
{
    H5E_t   *estack;            /* Error stack to operate on */
    herr_t ret_value = SUCCEED; /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE2("e", "i*Iu", estack_id, is_stack);

    if(estack_id == H5E_DEFAULT) {
    	if(NULL == (estack = H5E__get_my_stack())) /*lint !e506 !e774 Make lint 'constant value Boolean' in non-threaded case */
            HGOTO_ERROR(H5E_ERROR, H5E_CANTGET, FAIL, "can't get current error stack")
    } /* end if */
    else
        if(NULL == (estack = (H5E_t *)H5I_object_verify(estack_id, H5I_ERROR_STACK)))
            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a error stack ID")

    /* Check if the error stack reporting function is the "newer" stack type */
    if(is_stack)
#ifndef H5_NO_DEPRECATED_SYMBOLS
        *is_stack = estack->auto_op.vers > 1;
#else
        *is_stack = 1;
#endif

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5Eauto_is_v2() */