summaryrefslogtreecommitdiffstats
path: root/src/H5B2.c
blob: 087f0c728b98d4f1e917341dbedabdd3bcd7af85 (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 files COPYING and Copyright.html.  COPYING can be found at the root   *
 * of the source code distribution tree; Copyright.html can be found at the  *
 * root level of an installed copy of the electronic HDF5 document set and   *
 * is linked from the top-level documents page.  It can also be found at     *
 * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
 * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5B2.c
 *			Jan 31 2005
 *			Quincey Koziol <koziol@ncsa.uiuc.edu>
 *
 * Purpose:		Implements a B-tree, with several modifications from
 *                      the "standard" methods.
 *
 *                      Please see the documentation in:
 *                      doc/html/TechNotes/Btrees.html for a full description
 *                      of how they work, etc.
 *
 *-------------------------------------------------------------------------
 */

#define H5B2_PACKAGE		/*suppress error about including H5B2pkg  */

/* Private headers */
#include "H5private.h"		/* Generic Functions			*/
#include "H5B2pkg.h"		/* B-trees				*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5MFprivate.h"	/* File memory management		*/

/* Local macros */

/* Format overhead for each node (on disk) */
#define H5B2_OVERHEAD_SIZE              (H5B2_SIZEOF_MAGIC+1)   /* Signature + version # */

/* Number of records that fit into internal node */
#define H5B2_NUM_INT_REC(f,n,r)         (((n)-(H5B2_OVERHEAD_SIZE+H5B2_NODE_POINTER_SIZE(f)))/((r)+H5B2_NODE_POINTER_SIZE(f)))

/* Number of records that fit into leaf node */
#define H5B2_NUM_LEAF_REC(n,r)          (((n)-H5B2_OVERHEAD_SIZE)/(r))


/* Local typedefs */

/* Local prototypes */

/* Helper functions */
static herr_t H5B2_create_leaf(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2, H5B2_node_ptr_t *node_ptr);
static int H5B2_locate_record(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type,
    unsigned nrec, size_t *rec_off, const uint8_t *native,
    const void *udata);
static herr_t H5B2_split_root(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2,
    H5RC_t *bt2_shared);
static herr_t H5B2_create_internal(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2,
    H5B2_node_ptr_t *node_ptr);


/* Package variables */

/* Declare a free list to manage the H5B2_t struct */
H5FL_DEFINE(H5B2_t);

/* Declare a free list to manage the H5B2_internal_t struct */
H5FL_DEFINE(H5B2_internal_t);

/* Declare a free list to manage the H5B2_leaf_t struct */
H5FL_DEFINE(H5B2_leaf_t);


/* Static variables */

/* Declare a free list to manage B-tree node pages to/from disk */
H5FL_BLK_DEFINE_STATIC(node_page);

/* Declare a free list to manage the 'size_t' sequence information */
H5FL_SEQ_DEFINE_STATIC(size_t);

/* Declare a free list to manage the H5B2_shared_t struct */
H5FL_DEFINE_STATIC(H5B2_shared_t);



/*-------------------------------------------------------------------------
 * Function:	H5B2_shared_init
 *
 * Purpose:	Allocate & initialize shared B-tree info
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  2 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_shared_init (H5F_t *f, H5B2_t *bt2, const H5B2_class_t *type,
    size_t node_size, size_t rkey_size,
    unsigned split_percent, unsigned merge_percent)
{
    H5B2_shared_t *shared = NULL;       /* Shared B-tree information */
    unsigned u;                         /* Local index variable */
    herr_t ret_value=SUCCEED;           /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5B2_shared_init)

    /* Allocate space for the shared information */
    if(NULL==(shared = H5FL_CALLOC(H5B2_shared_t)))
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree shared information")

    /* Assign user's information */
    shared->split_percent = split_percent;
    shared->merge_percent = merge_percent;
    shared->node_size = node_size;
    shared->rkey_size = rkey_size;

    /* Compute derived information */
    shared->internal_nrec = H5B2_NUM_INT_REC(f,shared->node_size,shared->rkey_size);
    shared->split_int_nrec = (shared->internal_nrec * shared->split_percent)/100;
    shared->merge_int_nrec = (shared->internal_nrec * shared->merge_percent)/100;

    shared->leaf_nrec = H5B2_NUM_LEAF_REC(shared->node_size,shared->rkey_size);
    shared->split_leaf_nrec = (shared->leaf_nrec * shared->split_percent)/100;
    shared->merge_leaf_nrec = (shared->leaf_nrec * shared->merge_percent)/100;

    /* Assign common type information */
    shared->type = type;

    /* Allocate "page" for node I/O */
    if((shared->page=H5FL_BLK_MALLOC(node_page,shared->node_size))==NULL)
        HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");

    /* Create factory for internal node native record storage */
    if((shared->int_fac=H5FL_fac_init(type->nkey_size*shared->internal_nrec))==NULL)
	HGOTO_ERROR (H5E_RESOURCE, H5E_CANTINIT, NULL, "can't create internal node native key block factory")

    /* Create factory for leaf node native record storage */
    if((shared->leaf_fac=H5FL_fac_init(type->nkey_size*shared->leaf_nrec))==NULL)
	HGOTO_ERROR (H5E_RESOURCE, H5E_CANTINIT, NULL, "can't create leaf node native key block factory")

    /* Create factory for internal node node pointer storage */
    if((shared->node_ptr_fac=H5FL_fac_init(sizeof(H5B2_node_ptr_t)*(shared->internal_nrec+1)))==NULL)
	HGOTO_ERROR (H5E_RESOURCE, H5E_CANTINIT, NULL, "can't create internal node node pointer block factory")

    /* Allocate array of pointers to internal node native keys */
    if((shared->nat_off=H5FL_SEQ_MALLOC(size_t,MAX(shared->internal_nrec,shared->leaf_nrec)))==NULL)
        HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");

    /* Initialize offsets in native key block */
    for(u=0; u<MAX(shared->internal_nrec,shared->leaf_nrec); u++)
        shared->nat_off[u]=type->nkey_size*u;

    /* Make shared B-tree info reference counted */
    if(NULL==(bt2->shared=H5RC_create(shared,H5B2_shared_free)))
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "can't create ref-count wrapper for shared B-tree info")

done:
    if(ret_value<0)
        if(shared)
            H5B2_shared_free(shared);

    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_shared_init() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_shared_free
 *
 * Purpose:	Free shared B-tree info
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  2 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_shared_free (void *_shared)
{
    H5B2_shared_t *shared = (H5B2_shared_t *)_shared;
    herr_t ret_value=SUCCEED;

    FUNC_ENTER_NOAPI_NOINIT(H5B2_shared_free)

    /* Sanity check */
    HDassert(shared);

    /* Free the B-tree node buffer */
    if(shared->page)
        H5FL_BLK_FREE(node_page,shared->page);

    /* Destroy factory for internal node native record storage */
    if(shared->int_fac)
        if(H5FL_fac_term(shared->int_fac)<0)
            HGOTO_ERROR (H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't destroy internal node native key block factory")

    /* Destroy factory for leaf node native record storage */
    if(shared->leaf_fac)
        if(H5FL_fac_term(shared->leaf_fac)<0)
            HGOTO_ERROR (H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't destroy leaf node native key block factory")

    /* Destroy factory for internal node node pointer storage */
    if(shared->node_ptr_fac)
        if(H5FL_fac_term(shared->node_ptr_fac)<0)
            HGOTO_ERROR (H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't destroy internal node node pointer block factory")

    /* Free the array of offsets into the native key block */
    if(shared->nat_off)
        H5FL_SEQ_FREE(size_t,shared->nat_off);

    /* Free the shared B-tree info itself */
    H5FL_FREE(H5B2_shared_t,shared);

done:
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_shared_free() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_create
 *
 * Purpose:	Creates a new empty B-tree in the file.
 *
 * Return:	Success:	Pointer to a new B-tree.
 *
 *		Failure:	NULL
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Jan 31 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_create(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type,
    size_t node_size, size_t rkey_size,
    unsigned split_percent, unsigned merge_percent, haddr_t *addr_p)
{
    H5B2_t *bt2 = NULL;                 /* The new B-tree header information */
    herr_t ret_value=SUCCEED;

    FUNC_ENTER_NOAPI(H5B2_create, FAIL)

    /*
     * Check arguments.
     */
    HDassert(f);
    HDassert(type);
    HDassert(node_size>0);
    HDassert(rkey_size>0);
    HDassert(merge_percent>0 && merge_percent<=100);
    HDassert(split_percent>0 && split_percent<=100);
    HDassert(merge_percent<(split_percent/2));

    /*
     * Allocate file and memory data structures.
     */
    if (NULL==(bt2 = H5FL_MALLOC(H5B2_t)))
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree header")

    /* Assign internal information */
    HDmemset(&bt2->cache_info,0,sizeof(H5AC_info_t));
    bt2->cache_info.is_dirty = TRUE;
    bt2->depth = 0;
    bt2->root.addr = HADDR_UNDEF;
    bt2->root.node_nrec = bt2->root.all_nrec = 0;

    /* Initialize shared B-tree info */
    if(H5B2_shared_init(f, bt2, type, node_size, rkey_size, split_percent, merge_percent)<0)
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "can't create shared B-tree info")

    /* Allocate space for the header on disk */
    if (HADDR_UNDEF==(*addr_p=H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)H5B2_HEADER_SIZE(f))))
	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for B-tree header")

    /* Cache the new B-tree node */
    if (H5AC_set(f, dxpl_id, H5AC_BT2_HDR, *addr_p, bt2, H5AC__NO_FLAGS_SET) < 0)
	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't add B-tree header to cache")

done:
    if (ret_value<0) {
	if (bt2)
            (void)H5B2_cache_hdr_dest(f,bt2);
    } /* end if */
    
    FUNC_LEAVE_NOAPI(ret_value)
} /* end H5B2_create() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_locate_record
 *
 * Purpose:	Performs a binary search to locate a record in a sorted
 *              array of records.
 *
 * Return:	Success:	Non-negative array index where new record
 *                              should be inserted
 *
 *		Failure:	Negative, if record already is in array of
 *                              records.
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  3 2005
 *
 *-------------------------------------------------------------------------
 */
static int
H5B2_locate_record(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type,
    unsigned nrec, size_t *rec_off, const uint8_t *native,
    const void *udata)
{
    unsigned	lo = 0, hi;     /* Low & high index values */
    int         idx = 0;        /* Final index value */
    int         cmp = -1;       /* Key comparison value */

    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_locate_record)

    hi = nrec;
    while (lo < hi && cmp) {
	idx = (lo + hi) / 2;
	if ((cmp = (type->compare)(f, dxpl_id, udata, native+rec_off[idx])) < 0)
	    hi = idx;
	else
	    lo = idx + 1;
    }
    if(cmp==0)
        idx=(-1);
    else if(cmp>0)
        idx++;

    FUNC_LEAVE_NOAPI(idx);
} /* end H5B2_locate_record */


/*-------------------------------------------------------------------------
 * Function:	H5B2_split_root
 *
 * Purpose:	Split the root node
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  3 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5B2_split_root(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2, H5RC_t *bt2_shared)
{
    H5B2_shared_t *shared;              /* B-tree's shared info */
    herr_t ret_value=SUCCEED;           /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5B2_split_root)

    HDassert(f);
    HDassert(bt2);
    HDassert(bt2_shared);

    /* Get the pointer to the shared B-tree info */
    shared=H5RC_GET_OBJ(bt2_shared);
    HDassert(shared);

    if(bt2->depth==0) {
        H5B2_internal_t *new_int=NULL;  /* Pointer to new internal node */
        H5B2_leaf_t *old_leaf=NULL, *new_leaf=NULL;       /* Pointers to old & new leaf nodes */
        H5B2_node_ptr_t new_int_ptr;    /* Node pointer to manage new internal node */
        H5B2_node_ptr_t new_leaf_ptr;   /* Node pointer to manage new leaf node */
        H5B2_node_ptr_t old_leaf_ptr;   /* Node pointer to manage old leaf node */
        unsigned mid_record;            /* Index of "middle" record in current node */

        /* Create new leaf node */
        new_leaf_ptr.all_nrec=new_leaf_ptr.node_nrec=0;
        if(H5B2_create_leaf(f, dxpl_id, bt2, &new_leaf_ptr)<0)
	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new leaf node")

        /* Determine "middle" record to promote to new root */
        mid_record = shared->split_leaf_nrec/2;

        /* Set "old" leaf pointer to root node */
        old_leaf_ptr = bt2->root;

        /* Protect both leafs */
        if (NULL == (old_leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, old_leaf_ptr.addr, &(old_leaf_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node")
        if (NULL == (new_leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, new_leaf_ptr.addr, &(new_leaf_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node")

        /* Copy "upper half" of records to new leaf */
        HDmemcpy(new_leaf->leaf_native,H5B2_LEAF_NREC(old_leaf,shared,mid_record+1),shared->type->nkey_size*(shared->split_leaf_nrec-(mid_record+1)));

        /* Create new internal node */
        new_int_ptr.all_nrec=new_int_ptr.node_nrec=0;
        if(H5B2_create_internal(f, dxpl_id, bt2, &new_int_ptr)<0)
	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new internal node")

        /* Protect new internal node */
        if (NULL == (new_int = H5AC_protect(f, dxpl_id, H5AC_BT2_INT, new_int_ptr.addr, &(new_int_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")

        /* Copy "middle" record to new internal node */
        HDmemcpy(new_int->int_native,H5B2_LEAF_NREC(old_leaf,shared,mid_record),shared->type->nkey_size);

        /* Update record counts in leaf nodes */
        old_leaf_ptr.all_nrec = old_leaf_ptr.node_nrec = old_leaf->nrec = mid_record;
        new_leaf_ptr.all_nrec = new_leaf_ptr.node_nrec = new_leaf->nrec = shared->split_leaf_nrec-(mid_record+1);

        /* Mark leaf nodes as dirty */
        old_leaf->cache_info.is_dirty = TRUE;
        new_leaf->cache_info.is_dirty = TRUE;

        /* Release leaf nodes */
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, old_leaf_ptr.addr, old_leaf, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, new_leaf_ptr.addr, new_leaf, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")

        /* Set internal node pointers to leaf nodes */
        new_int->node_ptrs[0] = old_leaf_ptr;
        new_int->node_ptrs[1] = new_leaf_ptr;

        /* Update record count in new internal node */
        new_int->nrec = 1;

        /* Mark new internal node as dirty */
        new_int->cache_info.is_dirty = TRUE;

        /* Release new internal node */
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_INT, new_int_ptr.addr, new_int, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree internal node")

        /* Update depth of B-tree */
        bt2->depth++;

        /* Update pointer to B-tree's root node to pointer to new internal node */
        bt2->root.addr = new_int_ptr.addr;
        bt2->root.node_nrec = 1;

        /* Mark B-tree header as dirty */
        bt2->cache_info.is_dirty = TRUE;
    } /* end if */
    else {
HDfprintf(stderr,"%s: Need to split internal root! shared->split_int_nrec=%Zu\n",FUNC,shared->split_int_nrec);
HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split internal root node yet")
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value);
} /* end H5B2_split_root */

#ifdef LATER

/*-------------------------------------------------------------------------
 * Function:	H5B2_redistribute
 *
 * Purpose:	Redistribute records between several nodes
 *
 * Return:	Success:	Non-negative
 *
 *		Failure:	Negative
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  8 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5B2_redistribute(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2, H5RC_t *bt2_shared)
{
    H5B2_shared_t *shared;              /* B-tree's shared info */
    herr_t ret_value=SUCCEED;           /* Return value */

    FUNC_ENTER_NOAPI_NOINIT(H5B2_split_root)

    HDassert(f);
    HDassert(bt2);
    HDassert(bt2_shared);

    /* Get the pointer to the shared B-tree info */
    shared=H5RC_GET_OBJ(bt2_shared);
    HDassert(shared);

    if(bt2->depth==0) {
        H5B2_internal_t *new_int=NULL;  /* Pointer to new internal node */
        H5B2_leaf_t *old_leaf=NULL, *new_leaf=NULL;       /* Pointers to old & new leaf nodes */
        H5B2_node_ptr_t new_int_ptr;    /* Node pointer to manage new internal node */
        H5B2_node_ptr_t new_leaf_ptr;   /* Node pointer to manage new leaf node */
        H5B2_node_ptr_t old_leaf_ptr;   /* Node pointer to manage old leaf node */
        unsigned mid_record;            /* Index of "middle" record in current node */

        /* Create new leaf node */
        new_leaf_ptr.all_nrec=new_leaf_ptr.node_nrec=0;
        if(H5B2_create_leaf(f, dxpl_id, bt2, &new_leaf_ptr)<0)
	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new leaf node")

        /* Determine "middle" record to promote to new root */
        mid_record = shared->split_leaf_nrec/2;

        /* Set "old" leaf pointer to root node */
        old_leaf_ptr = bt2->root;

        /* Protect both leafs */
        if (NULL == (old_leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, old_leaf_ptr.addr, &(old_leaf_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node")
        if (NULL == (new_leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, new_leaf_ptr.addr, &(new_leaf_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node")

        /* Copy "upper half" of records to new leaf */
        HDmemcpy(new_leaf->leaf_native,H5B2_LEAF_NREC(old_leaf,shared,mid_record+1),shared->type->nkey_size*(shared->split_leaf_nrec-(mid_record+1)));

        /* Create new internal node */
        new_int_ptr.all_nrec=new_int_ptr.node_nrec=0;
        if(H5B2_create_internal(f, dxpl_id, bt2, &new_int_ptr)<0)
	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new internal node")

        /* Protect new internal node */
        if (NULL == (new_int = H5AC_protect(f, dxpl_id, H5AC_BT2_INT, new_int_ptr.addr, &(new_int_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")

        /* Copy "middle" record to new internal node */
        HDmemcpy(new_int->int_native,H5B2_LEAF_NREC(old_leaf,shared,mid_record),shared->type->nkey_size);

        /* Update record counts in leaf nodes */
        old_leaf_ptr.all_nrec = old_leaf_ptr.node_nrec = old_leaf->nrec = mid_record;
        new_leaf_ptr.all_nrec = new_leaf_ptr.node_nrec = new_leaf->nrec = shared->split_leaf_nrec-(mid_record+1);

        /* Mark leaf nodes as dirty */
        old_leaf->cache_info.is_dirty = TRUE;
        new_leaf->cache_info.is_dirty = TRUE;

        /* Release leaf nodes */
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, old_leaf_ptr.addr, old_leaf, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, new_leaf_ptr.addr, new_leaf, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")

        /* Set internal node pointers to leaf nodes */
        new_int->node_ptrs[0] = old_leaf_ptr;
        new_int->node_ptrs[1] = new_leaf_ptr;

        /* Update record count in new internal node */
        new_int->nrec = 1;

        /* Mark new internal node as dirty */
        new_int->cache_info.is_dirty = TRUE;

        /* Release new internal node */
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_INT, new_int_ptr.addr, new_int, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree internal node")

        /* Update depth of B-tree */
        bt2->depth++;

        /* Update pointer to B-tree's root node to pointer to new internal node */
        bt2->root.addr = new_int_ptr.addr;
        bt2->root.node_nrec = 1;

        /* Mark B-tree header as dirty */
        bt2->cache_info.is_dirty = TRUE;
    } /* end if */
    else {
HDfprintf(stderr,"%s: Need to split internal root! shared->split_int_nrec=%Zu\n",FUNC,shared->split_int_nrec);
HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split internal root node yet")
    } /* end else */

done:
    FUNC_LEAVE_NOAPI(ret_value);
} /* end H5B2_split_root */
#endif /* LATER */


/*-------------------------------------------------------------------------
 * Function:	H5B2_insert
 *
 * Purpose:	Adds a new record to the B-tree.  If the root node of
 *		the B-tree splits then the B-tree header tracks the new
 *              root node created.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  2 2005
 *
 *-------------------------------------------------------------------------
 */
herr_t
H5B2_insert(H5F_t *f, hid_t dxpl_id, const H5B2_class_t *type, haddr_t addr,
           void *udata)
{
    H5B2_t	*bt2=NULL;              /* Pointer to the B-tree header */
    H5RC_t      *bt2_shared=NULL;       /* Pointer to ref-counter for shared B-tree info */
    hbool_t     incr_rc=FALSE;          /* Flag to indicate that we've incremented the B-tree's shared info reference count */
    H5B2_shared_t *shared;              /* Pointer to B-tree's shared information */
    H5B2_node_ptr_t leaf_ptr;           /* Node pointer info for leaf node */
    H5B2_leaf_t *leaf=NULL;             /* Pointer to leaf node */
    int         idx;                    /* Location of record which matches key */
    herr_t	ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5B2_insert, FAIL)

    /* Check arguments. */
    HDassert(f);
    HDassert(type);
    HDassert(H5F_addr_defined(addr));

    /* Look up the b-tree header */
    if (NULL == (bt2 = H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, addr, type, NULL, H5AC_WRITE)))
	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")

    /* Get the pointer to the shared B-tree info */
    shared=H5RC_GET_OBJ(bt2->shared);
    HDassert(shared);

    /* Safely grab pointer to reference counted shared B-tree info, so we can release the B-tree header if necessary */
    bt2_shared=bt2->shared;
    H5RC_INC(bt2_shared);
    incr_rc=TRUE;

    /* Check if the root node is allocated yet */
    if(!H5F_addr_defined(bt2->root.addr)) {
        /* Create root node as leaf node in B-tree */
        if(H5B2_create_leaf(f, dxpl_id, bt2, &(bt2->root))<0)
	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create root node")

        /* Mark B-tree header as dirty, since we updated the address of the root node */
        bt2->cache_info.is_dirty = TRUE;
    } /* end if */
    /* Check if we need to split the root node */
    else if((bt2->depth==0 && bt2->root.node_nrec==shared->split_leaf_nrec) ||
            (bt2->depth>0 && bt2->root.node_nrec==shared->split_int_nrec)) {
        /* Split root node */
        if(H5B2_split_root(f, dxpl_id, bt2, bt2_shared)<0)
            HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split root node")
    } /* end if */
        
    /* Check for non-trivial B-tree */
    if(bt2->depth>0) {
        H5B2_internal_t *internal;          /* Pointer to internal node in B-tree */
        H5AC_info_t *parent_cache_info;     /* Parent node's cache info */
        haddr_t     parent_addr;            /* Address of parent which contain's node pointer to current node */
        void        *parent_ptr;            /* Pointer to parent structure in memory */
        H5AC_info_t *curr_cache_info=NULL;  /* Current node's cache info */
        H5B2_node_ptr_t *curr_node_ptr;     /* Pointer to node pointer info for current node (in parent node) */
        haddr_t curr_addr=HADDR_UNDEF;      /* Address of current node */
        void        *curr_ptr=NULL;         /* Pointer to current structure in memory */
        H5B2_node_ptr_t *child_node_ptr=NULL;   /* Pointer to node pointer info for child node */
        unsigned    depth;                  /* Depth of current node */

        /* Track the depth of current node (leaves are depth 0) */
        depth=bt2->depth;

        /* Set initial "parent" information to the B-tree header */
        parent_cache_info=&(bt2->cache_info);
        parent_addr=addr;
        parent_ptr=bt2;

        /* Set initial node pointer for "current" node */
        curr_node_ptr=&(bt2->root);

        /* Find correct leaf to insert node into */
        while(depth>0) {
            /* Lock B-tree current node */
            if (NULL == (internal = H5AC_protect(f, dxpl_id, H5AC_BT2_INT, curr_node_ptr->addr, &(curr_node_ptr->node_nrec), bt2_shared, H5AC_WRITE)))
                HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")

            /* Set information for current (root) node */
            curr_cache_info=&(internal->cache_info);
            curr_addr=curr_node_ptr->addr;
            curr_ptr=internal;

            /* Locate node pointer for child */
            if((idx=H5B2_locate_record(f,dxpl_id,shared->type,internal->nrec,shared->nat_off,internal->int_native,udata))<0)
                HGOTO_ERROR(H5E_BTREE, H5E_EXISTS, FAIL, "record is already in B-tree")

            /* Get node pointer for child */
            child_node_ptr=&(internal->node_ptrs[idx]);

            /* Preemptively split/redistribute a node we will enter */
            if((depth==1 && child_node_ptr->node_nrec==shared->split_leaf_nrec) ||
                    (depth>1 && child_node_ptr->node_nrec==shared->split_int_nrec)) {
                /* Attempt to redistribute records among children */
                if(idx==0) {
HDfprintf(stderr,"%s: left-most child\n",FUNC);
                } /* end if */
                else if(idx==(internal->nrec-1)) {
HDfprintf(stderr,"%s: right-most child\n",FUNC);
                } /* end if */
                else {
HDfprintf(stderr,"%s: middle child\n",FUNC);
                } /* end else */

HDfprintf(stderr,"%s: need to split child node!, depth=%u, idx=%d\n",FUNC,depth,idx);
HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split child node")
                /* Split children, if can't redistribute */
                    /* Update record count info for current node to reflect new # of records (in parent) */
                /* Update child_node_ptr (to reflect change in location from split/redistribution) */
            } /* end if */

            /* Update record count (in parent) */
            curr_node_ptr->all_nrec++;

            /* Mark parent node as dirty */
            parent_cache_info->is_dirty = TRUE;

            /* Unlock parent node (possibly the B-tree header) */
            if (H5AC_unprotect(f, dxpl_id, parent_cache_info->type, parent_addr, parent_ptr, H5AC__NO_FLAGS_SET) < 0)
                HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree info")

            /* Transition "current" info into "parent" info */
            parent_cache_info = curr_cache_info;
            parent_addr = curr_addr;
            parent_ptr = curr_ptr;

            /* Transition "child" node pointer to "current" node pointer */
            curr_node_ptr = child_node_ptr;

            /* Decrement depth of current node */
            depth--;
        } /* end while */

        /* Update record count for leaf (in current node) */
        HDassert(curr_node_ptr);
        curr_node_ptr->all_nrec++;
        curr_node_ptr->node_nrec++;

        /* Mark parent node as dirty */
        curr_cache_info->is_dirty = TRUE;

        /* Copy node pointer info for leaf */
        leaf_ptr = *curr_node_ptr;

        /* Release current node */
        if (H5AC_unprotect(f, dxpl_id, curr_cache_info->type, curr_addr, curr_ptr, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree node")
    } /* end if */
    else {
        /* Update record count for root node */
        bt2->root.all_nrec++;
        bt2->root.node_nrec++;

        /* Mark parent node as dirty */
        bt2->cache_info.is_dirty = TRUE;

        /* Copy node pointer info for leaf */
        leaf_ptr = bt2->root;

        /* Release parent node */
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, addr, bt2, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header info")
        bt2=NULL;
    } /* end else */

    /* Must have a leaf node with enough space to insert a record now */
    HDassert(H5F_addr_defined(leaf_ptr.addr));
    HDassert((leaf_ptr.node_nrec-1)<shared->split_leaf_nrec); /* node pointer to leaf has already been incremented */

    /* Look up the B-tree leaf node */
    if (NULL == (leaf = H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, leaf_ptr.addr, &(leaf_ptr.node_nrec), bt2_shared, H5AC_WRITE)))
        HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node")

    /* Sanity check number of records */
    HDassert(leaf_ptr.all_nrec==leaf_ptr.node_nrec);
    HDassert(leaf->nrec==(leaf_ptr.node_nrec-1)); /* node pointer to leaf has already been incremented */

    /* Check for inserting into empty leaf */
    if(leaf->nrec==0)
        idx=0;
    else {
        /* Sanity check for the leaf node being full */
        HDassert(leaf->nrec!=shared->split_leaf_nrec);

        /* Find correct location to insert this record and make room for it */
        if((idx=H5B2_locate_record(f,dxpl_id,shared->type,leaf->nrec,shared->nat_off,leaf->leaf_native,udata))<0) {
            /* Release the B-tree leaf node */
            if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, leaf_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")

            HGOTO_ERROR(H5E_BTREE, H5E_EXISTS, FAIL, "record is already in B-tree")
        } /* end if */

        /* Make room for new record */
        if((unsigned)idx<leaf->nrec)
            HDmemmove(H5B2_LEAF_NREC(leaf,shared,idx+1),H5B2_LEAF_NREC(leaf,shared,idx),shared->type->nkey_size*(leaf->nrec-idx));
    } /* end else */

    /* Make callback to store record in native form */
    if((shared->type->store)(f,dxpl_id,udata,H5B2_LEAF_NREC(leaf,shared,idx))<0) {
        /* Release the B-tree leaf node */
        if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, leaf_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
            HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")

        HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into leaf node")
    } /* end if */

    /* Update number of records in node */
    leaf->nrec++;

    /* Mark leaf node as dirty also */
    leaf->cache_info.is_dirty = TRUE;

    /* Release the B-tree leaf node */
    if (H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, leaf_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
        HGOTO_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")

done:
    /* Check if we need to decrement the reference count for the B-tree's shared info */
    if(incr_rc)
        H5RC_DEC(bt2_shared);

    FUNC_LEAVE_NOAPI(ret_value)
} /* H5B2_insert() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_create_leaf
 *
 * Purpose:	Creates empty leaf node of a B-tree and update node pointer
 *              to point to it.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  2 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5B2_create_leaf(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2, H5B2_node_ptr_t *node_ptr)
{
    H5B2_leaf_t *leaf=NULL;     /* Pointer to new leaf node created */
    H5B2_shared_t *shared;      /* Shared B-tree information */
    herr_t	ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5B2_create_leaf, FAIL)

    /* Check arguments. */
    HDassert(f);
    HDassert(bt2);
    HDassert(node_ptr);

    /* Allocate memory for leaf information */
    if (NULL==(leaf = H5FL_MALLOC(H5B2_leaf_t)))
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree leaf info")

    /* Set metadata cache info */
    HDmemset(&leaf->cache_info,0,sizeof(H5AC_info_t));
    leaf->cache_info.is_dirty = TRUE;

    /* Share common B-tree information */
    leaf->shared = bt2->shared;
    H5RC_INC(leaf->shared);

    /* Get the pointer to the shared B-tree info */
    shared=H5RC_GET_OBJ(leaf->shared);
    HDassert(shared);

    /* Allocate space for the native keys in memory */
    if((leaf->leaf_native=H5FL_FAC_MALLOC(shared->leaf_fac))==NULL)
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree leaf native keys")

    /* Set number of records */
    leaf->nrec=0;

    /* Allocate space on disk for the leaf */
    if (HADDR_UNDEF==(node_ptr->addr=H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)shared->node_size)))
	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for B-tree leaf node")

    /* Cache the new B-tree node */
    if (H5AC_set(f, dxpl_id, H5AC_BT2_LEAF, node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't add B-tree leaf to cache")

done:
    if (ret_value<0) {
	if (leaf)
            (void)H5B2_cache_leaf_dest(f,leaf);
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* H5B2_create_leaf() */


/*-------------------------------------------------------------------------
 * Function:	H5B2_create_internal
 *
 * Purpose:	Creates empty internal node of a B-tree and update node pointer
 *              to point to it.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@ncsa.uiuc.edu
 *		Feb  3 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
H5B2_create_internal(H5F_t *f, hid_t dxpl_id, H5B2_t *bt2, H5B2_node_ptr_t *node_ptr)
{
    H5B2_internal_t *internal=NULL;     /* Pointer to new internal node created */
    H5B2_shared_t *shared;              /* Shared B-tree information */
    herr_t	ret_value = SUCCEED;

    FUNC_ENTER_NOAPI(H5B2_create_internal, FAIL)

    /* Check arguments. */
    HDassert(f);
    HDassert(bt2);
    HDassert(node_ptr);

    /* Allocate memory for internal node information */
    if (NULL==(internal = H5FL_MALLOC(H5B2_internal_t)))
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree internal info")

    /* Set metadata cache info */
    HDmemset(&internal->cache_info,0,sizeof(H5AC_info_t));
    internal->cache_info.is_dirty = TRUE;

    /* Share common B-tree information */
    internal->shared = bt2->shared;
    H5RC_INC(internal->shared);

    /* Get the pointer to the shared B-tree info */
    shared=H5RC_GET_OBJ(internal->shared);
    HDassert(shared);

    /* Allocate space for the native keys in memory */
    if((internal->int_native=H5FL_FAC_MALLOC(shared->int_fac))==NULL)
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree internal native keys")

    /* Allocate space for the node pointers in memory */
    if((internal->node_ptrs=H5FL_FAC_MALLOC(shared->node_ptr_fac))==NULL)
	HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree internal node pointers")

    /* Set number of records */
    internal->nrec=0;

    /* Allocate space on disk for the internal node */
    if (HADDR_UNDEF==(node_ptr->addr=H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)shared->node_size)))
	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for B-tree internal node")

    /* Cache the new B-tree node */
    if (H5AC_set(f, dxpl_id, H5AC_BT2_INT, node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't add B-tree internal node to cache")

done:
    if (ret_value<0) {
	if (internal)
            (void)H5B2_cache_internal_dest(f,internal);
    } /* end if */

    FUNC_LEAVE_NOAPI(ret_value)
} /* H5B2_create_internal() */