summaryrefslogtreecommitdiffstats
path: root/src/H5.c
blob: bd78ca2a9ef4ec2b672239aeb76c5f929e90b715 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

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


/***********/
/* Headers */
/***********/
#include "H5private.h"          /* Generic Functions                        */
#include "H5ACprivate.h"        /* Metadata cache                           */
#include "H5CXprivate.h"        /* API Contexts                             */
#include "H5Dprivate.h"         /* Datasets                                 */
#include "H5Eprivate.h"         /* Error handling                           */
#include "H5FLprivate.h"        /* Free lists                               */
#include "H5FSprivate.h"        /* File free space                          */
#include "H5Lprivate.h"         /* Links                                    */
#include "H5MMprivate.h"        /* Memory management                        */
#include "H5Pprivate.h"         /* Property lists                           */
#include "H5SLprivate.h"        /* Skip lists                               */
#include "H5Tprivate.h"         /* Datatypes                                */

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


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


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


/********************/
/* Local Prototypes */
/********************/
static void H5_debug_mask(const char*);
#ifdef H5_HAVE_PARALLEL
static int H5_mpi_delete_cb(MPI_Comm comm, int keyval, void *attr_val, int *flag);
#endif /*H5_HAVE_PARALLEL*/

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


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

/* HDF5 API Entered variable */
/* (move to H5.c when new FUNC_ENTER macros in actual use -QAK) */
hbool_t H5_api_entered_g = FALSE;

/* statically initialize block for pthread_once call used in initializing */
/* the first global mutex                                                 */
#ifdef H5_HAVE_THREADSAFE
H5_api_t H5_g;
#else
hbool_t H5_libinit_g = FALSE;   /* Library hasn't been initialized */
hbool_t H5_libterm_g = FALSE;   /* Library isn't being shutdown */
#endif

#ifdef H5_HAVE_MPE
hbool_t H5_MPEinit_g = FALSE;	/* MPE Library hasn't been initialized */
#endif

char                    H5_lib_vers_info_g[] = H5_VERS_INFO;
static hbool_t          H5_dont_atexit_g = FALSE;
H5_debug_t              H5_debug_g; /* debugging info */


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


/*--------------------------------------------------------------------------
 * NAME
 *   H5_init_library -- Initialize library-global information
 * USAGE
 *    herr_t H5_init_library()
 *
 * RETURNS
 *    Non-negative on success/Negative on failure
 *
 * DESCRIPTION
 *    Initializes any library-global data or routines.
 *
 *--------------------------------------------------------------------------
 */
herr_t
H5_init_library(void)
{
    herr_t ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(FAIL)

#ifdef H5_HAVE_PARALLEL
    {
	int mpi_initialized;
	int mpi_finalized;
        int mpi_code;

	MPI_Initialized(&mpi_initialized);
	MPI_Finalized(&mpi_finalized);

#ifdef H5_HAVE_MPE
        /* Initialize MPE instrumentation library. */
        if (!H5_MPEinit_g) {
            int mpe_code;
            if (mpi_initialized && !mpi_finalized) {
                mpe_code = MPE_Init_log();
                HDassert(mpe_code >=0);
                H5_MPEinit_g = TRUE;
            }
        }
#endif /*H5_HAVE_MPE*/

        /* add an attribute on MPI_COMM_SELF to call H5_term_library
           when it is destroyed, i.e. on MPI_Finalize */
        if (mpi_initialized && !mpi_finalized) {
            int key_val;

            if(MPI_SUCCESS != (mpi_code = MPI_Comm_create_keyval(MPI_COMM_NULL_COPY_FN,
                                                                 (MPI_Comm_delete_attr_function *)H5_mpi_delete_cb,
                                                                 &key_val, NULL)))
                HMPI_GOTO_ERROR(FAIL, "MPI_Comm_create_keyval failed", mpi_code)

            if(MPI_SUCCESS != (mpi_code = MPI_Comm_set_attr(MPI_COMM_SELF, key_val, NULL)))
                HMPI_GOTO_ERROR(FAIL, "MPI_Comm_set_attr failed", mpi_code)

            if(MPI_SUCCESS != (mpi_code = MPI_Comm_free_keyval(&key_val)))
                HMPI_GOTO_ERROR(FAIL, "MPI_Comm_free_keyval failed", mpi_code)
        }
    }
#endif /*H5_HAVE_PARALLEL*/

    /*
     * Make sure the package information is updated.
     */
    HDmemset(&H5_debug_g, 0, sizeof H5_debug_g);
    H5_debug_g.pkg[H5_PKG_A].name = "a";
    H5_debug_g.pkg[H5_PKG_AC].name = "ac";
    H5_debug_g.pkg[H5_PKG_B].name = "b";
    H5_debug_g.pkg[H5_PKG_D].name = "d";
    H5_debug_g.pkg[H5_PKG_E].name = "e";
    H5_debug_g.pkg[H5_PKG_F].name = "f";
    H5_debug_g.pkg[H5_PKG_G].name = "g";
    H5_debug_g.pkg[H5_PKG_HG].name = "hg";
    H5_debug_g.pkg[H5_PKG_HL].name = "hl";
    H5_debug_g.pkg[H5_PKG_I].name = "i";
    H5_debug_g.pkg[H5_PKG_M].name = "m";
    H5_debug_g.pkg[H5_PKG_MF].name = "mf";
    H5_debug_g.pkg[H5_PKG_MM].name = "mm";
    H5_debug_g.pkg[H5_PKG_O].name = "o";
    H5_debug_g.pkg[H5_PKG_P].name = "p";
    H5_debug_g.pkg[H5_PKG_S].name = "s";
    H5_debug_g.pkg[H5_PKG_T].name = "t";
    H5_debug_g.pkg[H5_PKG_V].name = "v";
    H5_debug_g.pkg[H5_PKG_VL].name = "vl";
    H5_debug_g.pkg[H5_PKG_Z].name = "z";

    /*
     * Install atexit() library cleanup routines unless the H5dont_atexit()
     * has been called.  Once we add something to the atexit() list it stays
     * there permanently, so we set H5_dont_atexit_g after we add it to prevent
     * adding it again later if the library is cosed and reopened.
     */
    if (!H5_dont_atexit_g) {

#if defined(H5_HAVE_THREADSAFE) && defined(H5_HAVE_WIN_THREADS)
        /* Clean up Win32 thread resources. Pthreads automatically cleans up.
         * This must be entered before the library cleanup code so it's
         * executed in LIFO order (i.e., last).
         */
	    (void)HDatexit(H5TS_win32_process_exit);
#endif /* H5_HAVE_THREADSAFE && H5_HAVE_WIN_THREADS */

        /* Normal library termination code */
        (void)HDatexit(H5_term_library);

        H5_dont_atexit_g = TRUE;
    } /* end if */

    /*
     * Initialize interfaces that might not be able to initialize themselves
     * soon enough.  The file & dataset interfaces must be initialized because
     * calling H5P_create() might require the file/dataset property classes to be
     * initialized.  The property interface must be initialized before the file
     * & dataset interfaces though, in order to provide them with the proper
     * property classes.
     * The link interface needs to be initialized so that link property lists
     * have their properties registered.
     * The FS module needs to be initialized as a result of the fix for HDFFV-10160:
     *   It might not be initialized during normal file open.
     *   When the application does not close the file, routines in the module might
     *   be called via H5_term_library() when shutting down the file.
     */
    if(H5E_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize error interface")
    if(H5VL_init_phase1() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize vol interface")
    if(H5P_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize property list interface")
    if(H5T_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize datatype interface")
    if(H5D_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize dataset interface")
    if(H5AC_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize metadata caching interface")
    if(H5L_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize link interface")
    if(H5FS_init() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize FS interface")

    /* Finish initializing interfaces that depend on the interfaces above */
    if(H5VL_init_phase2() < 0)
        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize vol interface")

    /* Debugging? */
    H5_debug_mask("-all");
    H5_debug_mask(HDgetenv("HDF5_DEBUG"));

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5_init_library() */


/*-------------------------------------------------------------------------
 * Function:	H5_term_library
 *
 * Purpose:	Terminate interfaces in a well-defined order due to
 *		dependencies among the interfaces, then terminate
 *		library-specific data.
 *
 * Return:	void
 *
 *-------------------------------------------------------------------------
 */
void
H5_term_library(void)
{
    int	pending, ntries = 0, n;
    size_t	at = 0;
    char	loop[1024];
    H5E_auto2_t func;

#ifdef H5_HAVE_THREADSAFE
    /* explicit locking of the API */
    H5_FIRST_THREAD_INIT
    H5_API_LOCK
#endif

    /* Don't do anything if the library is already closed */
    if(!(H5_INIT_GLOBAL))
        goto done;

    /* Indicate that the library is being shut down */
    H5_TERM_GLOBAL = TRUE;

    /* Push the API context without checking for errors */
    H5CX_push_special();

    /* Check if we should display error output */
    (void)H5Eget_auto2(H5E_DEFAULT, &func, NULL);

    /*
     * Terminate each interface. The termination functions return a positive
     * value if they do something that might affect some other interface in a
     * way that would necessitate some cleanup work in the other interface.
     */
#define DOWN(F)								      \
    (((n = H5##F##_term_package()) && (at + 8) < sizeof loop)?	      \
     (HDsprintf(loop + at, "%s%s", (at ? "," : ""), #F),			      \
      at += HDstrlen(loop + at),					      \
      n):                                                                     \
     ((n > 0 && (at + 5) < sizeof loop) ?				      \
     (HDsprintf(loop + at, "..."),					      \
      at += HDstrlen(loop + at),					      \
     n) : n))

    do {
        pending = 0;

        /* Try to organize these so the "higher" level components get shut
         * down before "lower" level components that they might rely on. -QAK
         */
        pending += DOWN(L);

        /* Close the "top" of various interfaces (IDs, etc) but don't shut
         *  down the whole interface yet, so that the object header messages
         *  get serialized correctly for entries in the metadata cache and the
         *  symbol table entry in the superblock gets serialized correctly, etc.
         *  all of which is performed in the 'F' shutdown.
         */
        pending += DOWN(A_top);
        pending += DOWN(D_top);
        pending += DOWN(G_top);
        pending += DOWN(M_top);
        pending += DOWN(R_top);
        pending += DOWN(S_top);
        pending += DOWN(T_top);

        /* Don't shut down the file code until objects in files are shut down */
        if(pending == 0)
            pending += DOWN(F);

        /* Don't shut down the property list code until all objects that might
         * use property lists are shut down */
        if(pending == 0)
            pending += DOWN(P);

        /* Wait to shut down the "bottom" of various interfaces until the
         *      files are closed, so pieces of the file can be serialized
         *      correctly.
         */
        if(pending == 0) {
            /* Shut down the "bottom" of the attribute, dataset, group,
             *  reference, dataspace, and datatype interfaces, fully closing
             *  out the interfaces now.
             */
            pending += DOWN(A);
            pending += DOWN(D);
            pending += DOWN(G);
            pending += DOWN(M);
            pending += DOWN(R);
            pending += DOWN(S);
            pending += DOWN(T);
        } /* end if */

        /* Don't shut down "low-level" components until "high-level" components
         * have successfully shut down.  This prevents property lists and IDs
         * from being closed "out from underneath" of the high-level objects
         * that depend on them. -QAK
         */
        if(pending == 0) {
            pending += DOWN(AC);
            pending += DOWN(Z);
            pending += DOWN(FD);
            pending += DOWN(VL);
            /* Don't shut down the plugin code until all "pluggable" interfaces (Z, FD, PL) are shut down */
            if(pending == 0)
                pending += DOWN(PL);
            /* Don't shut down the error code until other APIs which use it are shut down */
            if(pending == 0)
                pending += DOWN(E);
            /* Don't shut down the ID code until other APIs which use them are shut down */
            if(pending == 0)
                pending += DOWN(I);
            /* Don't shut down the skip list code until everything that uses it is down */
            if(pending == 0)
                pending += DOWN(SL);
            /* Don't shut down the free list code until everything that uses it is down */
            if(pending == 0)
                pending += DOWN(FL);
            /* Don't shut down the API context code until _everything_ else is down */
            if(pending == 0)
                pending += DOWN(CX);
        } /* end if */
    } while(pending && ntries++ < 100);

    if(pending) {
        /* Only display the error message if the user is interested in them. */
        if(func) {
            HDfprintf(stderr, "HDF5: infinite loop closing library\n");
            HDfprintf(stderr, "      %s\n", loop);
#ifndef NDEBUG
            HDabort();
#endif /* NDEBUG */
        } /* end if */
    } /* end if */

#ifdef H5_HAVE_MPE
    /* Close MPE instrumentation library.  May need to move this
     * down if any of the below code involves using the instrumentation code.
     */
    if(H5_MPEinit_g) {
        int mpi_initialized;
        int mpi_finalized;
        int mpe_code;

        MPI_Initialized(&mpi_initialized);
        MPI_Finalized(&mpi_finalized);

        if (mpi_initialized && !mpi_finalized) {
            mpe_code = MPE_Finish_log("h5log");
            HDassert(mpe_code >=0);
        } /* end if */
        H5_MPEinit_g = FALSE;	/* turn it off no matter what */
    } /* end if */
#endif

    /* Free open debugging streams */
    while(H5_debug_g.open_stream) {
        H5_debug_open_stream_t  *tmp_open_stream;

        tmp_open_stream = H5_debug_g.open_stream;
        (void)HDfclose(H5_debug_g.open_stream->stream);
        H5_debug_g.open_stream = H5_debug_g.open_stream->next;
        (void)H5MM_free(tmp_open_stream);
    } /* end while */

#if defined H5_MEMORY_ALLOC_SANITY_CHECK
    /* Sanity check memory allocations */
    H5MM_final_sanity_check();
#endif /* H5_MEMORY_ALLOC_SANITY_CHECK */

    /* Reset flag indicating that the library is being shut down */
    H5_TERM_GLOBAL = FALSE;

    /* Mark library as closed */
    H5_INIT_GLOBAL = FALSE;

    /* Don't pop the API context (i.e. H5CX_pop), since it's been shut down already */

done:
#ifdef H5_HAVE_THREADSAFE
    H5_API_UNLOCK
#endif /* H5_HAVE_THREADSAFE */

    return;
} /* end H5_term_library() */


/*-------------------------------------------------------------------------
 * Function:	H5dont_atexit
 *
 * Purpose:	Indicates that the library is not to clean up after itself
 *		when the application exits by calling exit() or returning
 *		from main().  This function must be called before any other
 *		HDF5 function or constant is used or it will have no effect.
 *
 *		If this function is used then certain memory buffers will not
 *		be de-allocated nor will open files be flushed automatically.
 *		The application may still call H5close() explicitly to
 *		accomplish these things.
 *
 * Return:	Success:	non-negative
 *
 *		Failure:	negative if this function is called more than
 *				once or if it is called too late.
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5dont_atexit(void)
{
    herr_t ret_value = SUCCEED;       /* Return value */

    FUNC_ENTER_API_NOINIT_NOERR_NOFS
    H5TRACE0("e","");

    if(H5_dont_atexit_g)
        ret_value = FAIL;
    else
        H5_dont_atexit_g = TRUE;

    FUNC_LEAVE_API_NOFS(ret_value)
} /* end H5dont_atexit() */


/*-------------------------------------------------------------------------
 * Function:	H5garbage_collect
 *
 * Purpose:	Walks through all the garbage collection routines for the
 *		library, which are supposed to free any unused memory they have
 *		allocated.
 *
 *      These should probably be registered dynamically in a linked list of
 *          functions to call, but there aren't that many right now, so we
 *          hard-wire them...
 *
 * Return:	Success:	non-negative
 *
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5garbage_collect(void)
{
    herr_t                  ret_value = SUCCEED;

    FUNC_ENTER_API(FAIL)
    H5TRACE0("e","");

    /* Call the garbage collection routines in the library */
    if(H5FL_garbage_coll()<0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGC, FAIL, "can't garbage collect objects")

done:
    FUNC_LEAVE_API(ret_value)
}   /* end H5garbage_collect() */


/*-------------------------------------------------------------------------
 * Function:	H5set_free_list_limits
 *
 * Purpose:	Sets limits on the different kinds of free lists.  Setting a value
 *      of -1 for a limit means no limit of that type.  These limits are global
 *      for the entire library.  Each "global" limit only applies to free lists
 *      of that type, so if an application sets a limit of 1 MB on each of the
 *      global lists, up to 3 MB of total storage might be allocated (1MB on
 *      each of regular, array and block type lists).
 *
 *      The settings for block free lists are duplicated to factory free lists.
 *      Factory free list limits cannot be set independently currently.
 *
 * Parameters:
 *  int reg_global_lim;  IN: The limit on all "regular" free list memory used
 *  int reg_list_lim;    IN: The limit on memory used in each "regular" free list
 *  int arr_global_lim;  IN: The limit on all "array" free list memory used
 *  int arr_list_lim;    IN: The limit on memory used in each "array" free list
 *  int blk_global_lim;  IN: The limit on all "block" free list memory used
 *  int blk_list_lim;    IN: The limit on memory used in each "block" free list
 *
 * Return:	Success:	non-negative
 *
 *		Failure:	negative
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5set_free_list_limits(int reg_global_lim, int reg_list_lim, int arr_global_lim,
    int arr_list_lim, int blk_global_lim, int blk_list_lim)
{
    herr_t                  ret_value = SUCCEED;

    FUNC_ENTER_API(FAIL)
    H5TRACE6("e", "IsIsIsIsIsIs", reg_global_lim, reg_list_lim, arr_global_lim,
             arr_list_lim, blk_global_lim, blk_list_lim);

    /* Call the free list function to actually set the limits */
    if(H5FL_set_free_list_limits(reg_global_lim, reg_list_lim, arr_global_lim, arr_list_lim,
            blk_global_lim, blk_list_lim, blk_global_lim, blk_list_lim)<0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "can't set garbage collection limits")

done:
    FUNC_LEAVE_API(ret_value)
}   /* end H5set_free_list_limits() */


/*-------------------------------------------------------------------------
 * Function:	H5get_free_list_sizes
 *
 * Purpose:	Gets the current size of the different kinds of free lists that
 *	the library uses to manage memory.  The free list sizes can be set with
 *	H5set_free_list_limits and garbage collected with H5garbage_collect.
 *      These lists are global for the entire library.
 *
 * Parameters:
 *  size_t *reg_size;    OUT: The current size of all "regular" free list memory used
 *  size_t *arr_size;    OUT: The current size of all "array" free list memory used
 *  size_t *blk_size;    OUT: The current size of all "block" free list memory used
 *  size_t *fac_size;    OUT: The current size of all "factory" free list memory used
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 * Programmer:  Quincey Koziol
 *              Friday, March 6, 2020
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5get_free_list_sizes(size_t *reg_size, size_t *arr_size, size_t *blk_size,
    size_t *fac_size)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE4("e", "*z*z*z*z", reg_size, arr_size, blk_size, fac_size);

    /* Call the free list function to actually get the sizes */
    if(H5FL_get_free_list_sizes(reg_size, arr_size, blk_size, fac_size) < 0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "can't get garbage collection sizes")

done:
    FUNC_LEAVE_API(ret_value)
}   /* end H5get_free_list_sizes() */


/*-------------------------------------------------------------------------
 * Function:	H5get_alloc_stats
 *
 * Purpose:	Gets the memory allocation statistics for the library, if the
 *	--enable-memory-alloc-sanity-check option was given when building the
 *      library.  Applications can check whether this option was enabled by
 *	detecting if the 'H5_MEMORY_ALLOC_SANITY_CHECK' macro is defined.  This
 *	option is enabled by default for debug builds of the library and
 *	disabled by default for non-debug builds.  If the option is not enabled,
 *	all the values returned with be 0.  These statistics are global for the
 *	entire library, but don't include allocations from chunked dataset I/O
 *	filters or non-native VOL connectors.
 *
 * Parameters:
 *  H5_alloc_stats_t *stats;            OUT: Memory allocation statistics
 *
 * Return:	Success:	non-negative
 *		Failure:	negative
 *
 * Programmer:  Quincey Koziol
 *              Saturday, March 7, 2020
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5get_alloc_stats(H5_alloc_stats_t *stats)
{
    herr_t ret_value = SUCCEED;         /* Return value */

    FUNC_ENTER_API(FAIL)
    H5TRACE1("e", "*x", stats);

    /* Call the internal allocation stat routine to get the values */
    if(H5MM_get_alloc_stats(stats) < 0)
        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "can't get allocation stats")

done:
    FUNC_LEAVE_API(ret_value)
}   /* end H5get_alloc_stats() */


/*-------------------------------------------------------------------------
 * Function:    H5_debug_mask
 *
 * Purpose:     Set runtime debugging flags according to the string S.  The
 *              string should contain file numbers and package names
 *              separated by other characters. A file number applies to all
 *              following package names up to the next file number. The
 *              initial file number is `2' (the standard error stream). Each
 *              package name can be preceded by a `+' or `-' to add or remove
 *              the package from the debugging list (`+' is the default). The
 *              special name `all' means all packages.
 *
 *              The name `trace' indicates that API tracing is to be turned
 *              on or off.
 *
 *              The name 'ttop' indicates that only top-level API calls
 *              should be shown. This also turns on tracing as if the
 *              'trace' word was shown.
 *
 * Return:      void
 *
 *-------------------------------------------------------------------------
 */
static void
H5_debug_mask(const char *s)
{
    FILE	*stream = stderr;
    char	pkg_name[32], *rest;
    size_t	i;
    hbool_t	clear;

    while (s && *s) {

        if (HDisalpha(*s) || '-'==*s || '+'==*s) {

            /* Enable or Disable debugging? */
            if ('-'==*s) {
                clear = TRUE;
                s++;
            } else if ('+'==*s) {
                clear = FALSE;
                s++;
            } else {
                clear = FALSE;
            } /* end if */

            /* Get the name */
            for (i=0; HDisalpha(*s); i++, s++)
                if (i<sizeof pkg_name)
                    pkg_name[i] = *s;
            pkg_name[MIN(sizeof(pkg_name)-1, i)] = '\0';

            /* Trace, all, or one? */
            if (!HDstrcmp(pkg_name, "trace")) {
                H5_debug_g.trace = clear ? NULL : stream;
            } else if (!HDstrcmp(pkg_name, "ttop")) {
                H5_debug_g.trace = stream;
                H5_debug_g.ttop = (hbool_t)!clear;
            } else if (!HDstrcmp(pkg_name, "ttimes")) {
                H5_debug_g.trace = stream;
                H5_debug_g.ttimes = (hbool_t)!clear;
            } else if (!HDstrcmp(pkg_name, "all")) {
                for (i=0; i<(size_t)H5_NPKGS; i++)
                    H5_debug_g.pkg[i].stream = clear ? NULL : stream;
            } else {
                for (i=0; i<(size_t)H5_NPKGS; i++) {
                    if (!HDstrcmp(H5_debug_g.pkg[i].name, pkg_name)) {
                        H5_debug_g.pkg[i].stream = clear ? NULL : stream;
                        break;
		            } /* end if */
                } /* end for */
                if (i>=(size_t)H5_NPKGS)
                    HDfprintf(stderr, "HDF5_DEBUG: ignored %s\n", pkg_name);
            } /* end if-else */

        } else if (HDisdigit(*s)) {
            int fd = (int)HDstrtol(s, &rest, 0);
            H5_debug_open_stream_t *open_stream;

            if((stream = HDfdopen(fd, "w")) != NULL) {
                (void)HDsetvbuf(stream, NULL, _IOLBF, (size_t)0);

                if(NULL == (open_stream = (H5_debug_open_stream_t *)H5MM_malloc(sizeof(H5_debug_open_stream_t)))) {
                    (void)HDfclose(stream);
                    return;
                } /* end if */

                open_stream->stream = stream;
                open_stream->next = H5_debug_g.open_stream;
                H5_debug_g.open_stream = open_stream;
            } /* end if */

            s = rest;
        } else {
            s++;
        } /* end if-else */
    } /* end while */

    return;

} /* end H5_debug_mask() */

#ifdef H5_HAVE_PARALLEL

/*-------------------------------------------------------------------------
 * Function:	H5_mpi_delete_cb
 *
 * Purpose:	Callback attribute on MPI_COMM_SELF to terminate the HDF5
 *              library when the communicator is destroyed, i.e. on MPI_Finalize.
 *
 * Return:	MPI_SUCCESS
 *
 *-------------------------------------------------------------------------
 */
static int H5_mpi_delete_cb(MPI_Comm H5_ATTR_UNUSED comm, int H5_ATTR_UNUSED keyval, void H5_ATTR_UNUSED *attr_val, int H5_ATTR_UNUSED *flag)
{
    H5_term_library();
    return MPI_SUCCESS;
}
#endif /*H5_HAVE_PARALLEL*/


/*-------------------------------------------------------------------------
 * Function:	H5get_libversion
 *
 * Purpose:	Returns the library version numbers through arguments. MAJNUM
 *		will be the major revision number of the library, MINNUM the
 *		minor revision number, and RELNUM the release revision number.
 *
 * Note:	When printing an HDF5 version number it should be printed as
 *
 * 		printf("%u.%u.%u", maj, min, rel)		or
 *		printf("version %u.%u release %u", maj, min, rel)
 *
 * Return:	Non-negative on success/Negative on failure
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5get_libversion(unsigned *majnum, unsigned *minnum, unsigned *relnum)
{
    herr_t                  ret_value = SUCCEED;

    FUNC_ENTER_API(FAIL)
    H5TRACE3("e", "*Iu*Iu*Iu", majnum, minnum, relnum);

    /* Set the version information */
    if (majnum) *majnum = H5_VERS_MAJOR;
    if (minnum) *minnum = H5_VERS_MINOR;
    if (relnum) *relnum = H5_VERS_RELEASE;

done:
    FUNC_LEAVE_API(ret_value)
} /* end H5get_libversion() */


/*-------------------------------------------------------------------------
 * Function:	H5check_version
 *
 * Purpose:	Verifies that the arguments match the version numbers
 *		compiled into the library.  This function is intended to be
 *		called from user to verify that the versions of header files
 *		compiled into the application match the version of the hdf5
 *		library.
 *
 * Return:	Success:	SUCCEED
 *
 *		Failure:	abort()
 *
 *-------------------------------------------------------------------------
 */
#define VERSION_MISMATCH_WARNING \
    "Warning! ***HDF5 library version mismatched error***\n" \
    "The HDF5 header files used to compile this application do not match\n" \
    "the version used by the HDF5 library to which this application is linked.\n" \
    "Data corruption or segmentation faults may occur if the application continues.\n" \
    "This can happen when an application was compiled by one version of HDF5 but\n" \
    "linked with a different version of static or shared HDF5 library.\n" \
    "You should recompile the application or check your shared library related\n" \
    "settings such as 'LD_LIBRARY_PATH'.\n"

herr_t
H5check_version(unsigned majnum, unsigned minnum, unsigned relnum)
{
    char	lib_str[256];
    char	substr[] = H5_VERS_SUBRELEASE;
    static int	checked = 0;            /* If we've already checked the version info */
    static unsigned int	disable_version_check = 0;      /* Set if the version check should be disabled */
    static const char *version_mismatch_warning = VERSION_MISMATCH_WARNING;
    herr_t      ret_value = SUCCEED;    /* Return value */

    FUNC_ENTER_API_NOINIT_NOERR_NOFS
    H5TRACE3("e", "IuIuIu", majnum, minnum, relnum);

    /* Don't check again, if we already have */
    if (checked)
	HGOTO_DONE(SUCCEED)

    {    const char *s;  /* Environment string for disabling version check */

        /* Allow different versions of the header files and library? */
        s = HDgetenv ("HDF5_DISABLE_VERSION_CHECK");

        if (s && HDisdigit(*s))
            disable_version_check = (unsigned int)HDstrtol (s, NULL, 0);
    }

    if (H5_VERS_MAJOR!=majnum || H5_VERS_MINOR!=minnum ||
            H5_VERS_RELEASE!=relnum) {
        switch (disable_version_check) {
	case 0:
	    HDfprintf(stderr, "%s%s", version_mismatch_warning,
		     "You can, at your own risk, disable this warning by setting the environment\n"
		     "variable 'HDF5_DISABLE_VERSION_CHECK' to a value of '1'.\n"
		     "Setting it to 2 or higher will suppress the warning messages totally.\n");
	    /* Mention the versions we are referring to */
	    HDfprintf (stderr, "Headers are %u.%u.%u, library is %u.%u.%u\n",
		     majnum, minnum, relnum,
		     (unsigned)H5_VERS_MAJOR, (unsigned)H5_VERS_MINOR, (unsigned)H5_VERS_RELEASE);
	    /* Show library settings if available */
	    HDfprintf (stderr, "%s", H5libhdf5_settings);

	    /* Bail out now. */
	    HDfputs ("Bye...\n", stderr);
	    HDabort ();
	case 1:
	    /* continue with a warning */
	    /* Note that the warning message is embedded in the format string.*/
            HDfprintf (stderr,
                     "%s'HDF5_DISABLE_VERSION_CHECK' "
                     "environment variable is set to %d, application will\n"
                     "continue at your own risk.\n",
		     version_mismatch_warning, disable_version_check);
	    /* Mention the versions we are referring to */
	    HDfprintf (stderr, "Headers are %u.%u.%u, library is %u.%u.%u\n",
		     majnum, minnum, relnum,
		     (unsigned)H5_VERS_MAJOR, (unsigned)H5_VERS_MINOR, (unsigned)H5_VERS_RELEASE);
	    /* Show library settings if available */
	    HDfprintf (stderr, "%s", H5libhdf5_settings);
	    break;
	default:
	    /* 2 or higher: continue silently */
	    break;
        } /* end switch */

    } /* end if */

    /* Indicate that the version check has been performed */
    checked = 1;

    if (!disable_version_check){
	/*
	 * Verify if H5_VERS_INFO is consistent with the other version information.
	 * Check only the first sizeof(lib_str) char.  Assume the information
	 * will fit within this size or enough significance.
	 */
	HDsnprintf(lib_str, sizeof(lib_str), "HDF5 library version: %d.%d.%d",
	    H5_VERS_MAJOR, H5_VERS_MINOR, H5_VERS_RELEASE);
	if(*substr) {
	    HDstrncat(lib_str, "-", (size_t)1);
	    HDstrncat(lib_str, substr, (sizeof(lib_str) - HDstrlen(lib_str)) - 1);
	} /* end if */
	if (HDstrcmp(lib_str, H5_lib_vers_info_g)){
	    HDfputs ("Warning!  Library version information error.\n"
		     "The HDF5 library version information are not "
		     "consistent in its source code.\nThis is NOT a fatal error "
		     "but should be corrected.  Setting the environment\n"
		     "variable 'HDF5_DISABLE_VERSION_CHECK' to a value of 1 "
		     "will suppress\nthis warning.\n",
		     stderr);
	    HDfprintf (stderr, "Library version information are:\n"
		     "H5_VERS_MAJOR=%d, H5_VERS_MINOR=%d, H5_VERS_RELEASE=%d, "
		     "H5_VERS_SUBRELEASE=%s,\nH5_VERS_INFO=%s\n",
		     H5_VERS_MAJOR, H5_VERS_MINOR, H5_VERS_RELEASE,
		     H5_VERS_SUBRELEASE, H5_VERS_INFO);
	} /* end if */
    }

done:
    FUNC_LEAVE_API_NOFS(ret_value)
} /* end H5check_version() */


/*-------------------------------------------------------------------------
 * Function:    H5open
 *
 * Purpose:     Initialize the library.  This is normally called
 *              automatically, but if you find that an HDF5 library function
 *              is failing inexplicably, then try calling this function
 *              first.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5open(void)
{
    herr_t ret_value=SUCCEED;   /* Return value */

    FUNC_ENTER_API_NOCLEAR(FAIL)
    H5TRACE0("e","");
    /* all work is done by FUNC_ENTER() */
done:
    FUNC_LEAVE_API(ret_value)
} /* end H5open() */


/*-------------------------------------------------------------------------
 * Function:	H5close
 *
 * Purpose:	Terminate the library and release all resources.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5close(void)
{
    /*
     * Don't call normal FUNC_ENTER() since we don't want to initialize the
     * whole library just to release it all right away.  It is safe to call
     * this function for an uninitialized library.
     */
    FUNC_ENTER_API_NOINIT_NOERR_NOFS
    H5TRACE0("e","");

    H5_term_library();

    FUNC_LEAVE_API_NOFS(SUCCEED)
} /* end H5close() */


/*-------------------------------------------------------------------------
 * Function:	H5allocate_memory
 *
 * Purpose:	    Allocate a memory buffer with the semantics of malloc().
 *
 *              NOTE: This function is intended for use with filter
 *              plugins so that all allocation and free operations
 *              use the same memory allocator. It is not intended for
 *              use as a general memory allocator in applications.
 *
 * Parameters:
 *
 *      size:   The size of the buffer.
 *
 *      clear:  Whether or not to memset the buffer to 0.
 *
 * Return:
 *
 *      Success:    A pointer to the allocated buffer.
 *
 *      Failure:    NULL
 *
 *-------------------------------------------------------------------------
 */
void *
H5allocate_memory(size_t size, hbool_t clear)
{
    void *ret_value = NULL;

    FUNC_ENTER_API_NOINIT
    H5TRACE2("*x", "zb", size, clear);

    if(clear)
        ret_value = H5MM_calloc(size);
    else
        ret_value = H5MM_malloc(size);

    FUNC_LEAVE_API_NOINIT(ret_value)
} /* end H5allocate_memory() */


/*-------------------------------------------------------------------------
 * Function:	H5resize_memory
 *
 * Purpose:	    Resize a memory buffer with the semantics of realloc().
 *
 *              NOTE: This function is intended for use with filter
 *              plugins so that all allocation and free operations
 *              use the same memory allocator. It is not intended for
 *              use as a general memory allocator in applications.
 *
 * Parameters:
 *
 *      mem:    The buffer to be resized.
 *
 *      size:   The size of the buffer.
 *
 * Return:
 *
 *      Success:    A pointer to the resized buffer.
 *
 *      Failure:    NULL (the input buffer will be unchanged)
 *
 *-------------------------------------------------------------------------
 */
void *
H5resize_memory(void *mem, size_t size)
{
    void *ret_value = NULL;

    FUNC_ENTER_API_NOINIT
    H5TRACE2("*x", "*xz", mem, size);

    ret_value = H5MM_realloc(mem, size);

    FUNC_LEAVE_API_NOINIT(ret_value)
} /* end H5resize_memory() */


/*-------------------------------------------------------------------------
 * Function:	H5free_memory
 *
 * Purpose:	    Frees memory allocated by the library that it is the user's
 *              responsibility to free.  Ensures that the same library
 *              that was used to allocate the memory frees it.  Passing
 *              NULL pointers is allowed.
 *
 * Return:	    SUCCEED/FAIL
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5free_memory(void *mem)
{
    FUNC_ENTER_API_NOINIT
    H5TRACE1("e", "*x", mem);

    /* At this time, it is impossible for this to fail. */
    H5MM_xfree(mem);

    FUNC_LEAVE_API_NOINIT(SUCCEED)
} /* end H5free_memory() */


/*-------------------------------------------------------------------------
 * Function:	H5is_library_threadsafe
 *
 * Purpose:	    Checks to see if the library was built with thread-safety
 *              enabled.
 *
 * Return:	    SUCCEED/FAIL
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5is_library_threadsafe(hbool_t *is_ts)
{
    FUNC_ENTER_API_NOINIT
    H5TRACE1("e", "*b", is_ts);

    HDassert(is_ts);

    /* At this time, it is impossible for this to fail. */
#ifdef H5_HAVE_THREADSAFE
    *is_ts = TRUE;
#else /* H5_HAVE_THREADSAFE */
    *is_ts = FALSE;
#endif /* H5_HAVE_THREADSAFE */

    FUNC_LEAVE_API_NOINIT(SUCCEED)
} /* end H5is_library_threadsafe() */


#if defined(H5_HAVE_THREADSAFE) && defined(H5_BUILT_AS_DYNAMIC_LIB) \
    && defined(H5_HAVE_WIN32_API) && defined(H5_HAVE_WIN_THREADS)
/*-------------------------------------------------------------------------
 * Function:    DllMain
 *
 * Purpose:     Handles various conditions in the library on Windows.
 *
 *    NOTE:     The main purpose of this is for handling Win32 thread cleanup
 *              on thread/process detach.
 *
 *              Only enabled when the shared Windows library is built with
 *              thread safety enabled.
 *
 * Return:      TRUE on success, FALSE on failure
 *
 *-------------------------------------------------------------------------
 */
BOOL WINAPI
DllMain(_In_ HINSTANCE hinstDLL, _In_ DWORD fdwReason, _In_ LPVOID lpvReserved)
{
    /* Don't add our function enter/leave macros since this function will be
     * called before the library is initialized.
     *
     * NOTE: Do NOT call any CRT functions in DllMain!
     * This includes any functions that are called by from here!
     */

    BOOL fOkay = TRUE;

    switch(fdwReason)
    {
    case DLL_PROCESS_ATTACH:
        break;

    case DLL_PROCESS_DETACH:
        break;

    case DLL_THREAD_ATTACH:
#ifdef H5_HAVE_WIN_THREADS
        if(H5TS_win32_thread_enter() < 0)
            fOkay = FALSE;
#endif /* H5_HAVE_WIN_THREADS */
        break;

    case DLL_THREAD_DETACH:
#ifdef H5_HAVE_WIN_THREADS
        if(H5TS_win32_thread_exit() < 0)
            fOkay = FALSE;
#endif /* H5_HAVE_WIN_THREADS */
        break;

    default:
        /* Shouldn't get here */
        fOkay = FALSE;
        break;
    }

    return fOkay;
}
#endif /* H5_HAVE_WIN32_API && H5_BUILT_AS_DYNAMIC_LIB && H5_HAVE_WIN_THREADS && H5_HAVE_THREADSAFE*/