summaryrefslogtreecommitdiffstats
path: root/src/H5EAhdr.c
blob: b8d33348d18981b996bae5b32125c4cd64b85f5d (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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 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://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*-------------------------------------------------------------------------
 *
 * Created:		H5EAhdr.c
 *			Aug 26 2008
 *			Quincey Koziol <koziol@hdfgroup.org>
 *
 * Purpose:		Array header routines for extensible arrays.
 *
 *-------------------------------------------------------------------------
 */

/**********************/
/* Module Declaration */
/**********************/

#define H5EA_MODULE


/***********************/
/* Other Packages Used */
/***********************/


/***********/
/* Headers */
/***********/
#include "H5private.h"		/* Generic Functions			*/
#include "H5Eprivate.h"		/* Error handling		  	*/
#include "H5EApkg.h"		/* Extensible Arrays			*/
#include "H5MFprivate.h"	/* File memory management		*/
#include "H5Vprivate.h"		/* Vectors and arrays 			*/


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

#ifndef NDEBUG
/* Max. # of bits for max. nelmts index */
#define H5EA_MAX_NELMTS_IDX_MAX 64
#endif /* NDEBUG */

/* # of elements in a data block for a particular super block */
#define H5EA_SBLK_DBLK_NELMTS(s, m)                                           \
    (size_t)H5_EXP2(((s) + 1) / 2) * (m)


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


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


/********************/
/* Local Prototypes */
/********************/


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


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

/* Alias for pointer to factory, for use when allocating sequences of them */
typedef H5FL_fac_head_t *H5FL_fac_head_ptr_t;


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

/* Declare a free list to manage the H5EA_hdr_t struct */
H5FL_DEFINE_STATIC(H5EA_hdr_t);

/* Declare a free list to manage the H5FL_fac_head_ptr_t sequence information */
H5FL_SEQ_DEFINE_STATIC(H5FL_fac_head_ptr_t);

/* Declare a free list to manage the H5EA_sblk_info_t sequence information */
H5FL_SEQ_DEFINE_STATIC(H5EA_sblk_info_t);



/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_alloc
 *
 * Purpose:	Allocate shared extensible array header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Aug 26 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
H5EA_hdr_t *, NULL, NULL,
H5EA__hdr_alloc(H5F_t *f))

    /* Local variables */
    H5EA_hdr_t *hdr = NULL;          /* Shared extensible array header */

    /* Check arguments */
    HDassert(f);

    /* Allocate space for the shared information */
    if(NULL == (hdr = H5FL_CALLOC(H5EA_hdr_t)))
	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for extensible array shared header")

    /* Set non-zero internal fields */
    hdr->addr = HADDR_UNDEF;

    /* Set the internal parameters for the array */
    hdr->f = f;
    hdr->sizeof_addr = H5F_SIZEOF_ADDR(f);
    hdr->sizeof_size = H5F_SIZEOF_SIZE(f);

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

CATCH
    if(!ret_value)
        if(hdr && H5EA__hdr_dest(hdr) < 0)
            H5E_THROW(H5E_CANTFREE, "unable to destroy extensible array header")

END_FUNC(PKG)   /* end H5EA__hdr_alloc() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_init
 *
 * Purpose:	Compute useful information for extensible array, based on
 *              "creation" information.
 *
 * Notes:	The equations for variables below are based on this information:
 *
 *	<sblk idx>  <# of dblks>  <size of dblks>       Range of elements in sblk
 *	==========  ============  ===============       =========================
 *	      0          1         1 * <dblk min elmts>   0 * <dblk min elmts> <->   1 * <dblk min elmts> - 1
 *	      1          1         2 * <dblk min elmts>   1 * <dblk min elmts> <->   3 * <dblk min elmts> - 1
 *	      2          2         2 * <dblk min elmts>   3 * <dblk min elmts> <->   7 * <dblk min elmts> - 1
 *	      3          2         4 * <dblk min elmts>   7 * <dblk min elmts> <->  15 * <dblk min elmts> - 1
 *	      4          4         4 * <dblk min elmts>  15 * <dblk min elmts> <->  31 * <dblk min elmts> - 1
 *	      5          4         8 * <dblk min elmts>  31 * <dblk min elmts> <->  63 * <dblk min elmts> - 1
 *	      6          8         8 * <dblk min elmts>  63 * <dblk min elmts> <-> 127 * <dblk min elmts> - 1
 *	      7          8        16 * <dblk min elmts> 127 * <dblk min elmts> <-> 255 * <dblk min elmts> - 1
 *	      .          .         . * <dblk min elmts>   . * <dblk min elmts> <->   . * <dblk min elmts> - 1
 *	      .          .         . * <dblk min elmts>   . * <dblk min elmts> <->   . * <dblk min elmts> - 1
 *	      .          .         . * <dblk min elmts>   . * <dblk min elmts> <->   . * <dblk min elmts> - 1
 *
 *	Therefore:
 *		<sblk idx>(<elmt idx>) = lg2((<elmt idx> / <dblk min elmts>) + 1)
 *		<# of dblks>(<sblk idx>) = 2 ^ (<sblk idx> / 2)
 *		<size of dblk>(<sblk idx>) = 2 ^ ((<sblk idx> + 1) / 2)
 *		<total # of sblks>(<max. # of elmts>) = 1 + (lg2(<max. # of elmts>) - lg2(<dblk min_elmts>))
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Sep 18 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
herr_t, SUCCEED, FAIL,
H5EA__hdr_init(H5EA_hdr_t *hdr, void *ctx_udata))

    /* Local variables */
    hsize_t start_idx;          /* First element index for each super block */
    hsize_t start_dblk;         /* First data block index for each super block */
    size_t u;                   /* Local index variable */

    /* Sanity check */
    HDassert(hdr);
    HDassert(hdr->cparam.max_nelmts_bits);
    HDassert(hdr->cparam.data_blk_min_elmts);
    HDassert(hdr->cparam.sup_blk_min_data_ptrs);

    /* Compute general information */
    hdr->nsblks = 1 + (hdr->cparam.max_nelmts_bits - H5V_log2_of2(hdr->cparam.data_blk_min_elmts));
    hdr->dblk_page_nelmts = (size_t)1 << hdr->cparam.max_dblk_page_nelmts_bits;
    hdr->arr_off_size = (unsigned char)H5EA_SIZEOF_OFFSET_BITS(hdr->cparam.max_nelmts_bits);
#ifdef QAK
HDfprintf(stderr, "%s: hdr->nsblks = %Zu\n", FUNC, hdr->nsblks);
#endif /* QAK */

    /* Allocate information for each super block */
    if(NULL == (hdr->sblk_info = H5FL_SEQ_MALLOC(H5EA_sblk_info_t, hdr->nsblks)))
        H5E_THROW(H5E_CANTALLOC, "memory allocation failed for super block info array")

    /* Compute information about each super block */
    start_idx = 0;
    start_dblk = 0;
    for(u = 0; u < hdr->nsblks; u++) {
        hdr->sblk_info[u].ndblks = (size_t)H5_EXP2(u / 2);
        hdr->sblk_info[u].dblk_nelmts = H5EA_SBLK_DBLK_NELMTS(u, hdr->cparam.data_blk_min_elmts);
        hdr->sblk_info[u].start_idx = start_idx;
        hdr->sblk_info[u].start_dblk = start_dblk;
#ifdef QAK
HDfprintf(stderr, "%s: hdr->sblk_info[%Zu] = {%Zu, %Zu, %Hu, %Hu}\n", FUNC, u, hdr->sblk_info[u].ndblks, hdr->sblk_info[u].dblk_nelmts, hdr->sblk_info[u].start_idx, hdr->sblk_info[u].start_dblk);
#endif /* QAK */

        /* Advance starting indices for next super block */
        start_idx += (hsize_t)hdr->sblk_info[u].ndblks * (hsize_t)hdr->sblk_info[u].dblk_nelmts;
        start_dblk += (hsize_t)hdr->sblk_info[u].ndblks;
    } /* end for */

    /* Set size of header on disk (locally and in statistics) */
    hdr->stats.computed.hdr_size = hdr->size = H5EA_HEADER_SIZE(hdr);

    /* Create the callback context, if there's one */
    if(hdr->cparam.cls->crt_context) {
        if(NULL == (hdr->cb_ctx = (*hdr->cparam.cls->crt_context)(ctx_udata)))
            H5E_THROW(H5E_CANTCREATE, "unable to create extensible array client callback context")
    } /* end if */

CATCH

END_FUNC(PKG)   /* end H5EA__hdr_init() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_alloc_elmts
 *
 * Purpose:	Allocate extensible array data block elements
 *
 * Return:	Non-NULL pointer to buffer for elements on success/NULL on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Sep 16 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
void *, NULL, NULL,
H5EA__hdr_alloc_elmts(H5EA_hdr_t *hdr, size_t nelmts))

    /* Local variables */
    void *elmts = NULL;         /* Element buffer allocated */
    unsigned idx;               /* Index of element buffer factory in header */

    /* Check arguments */
    HDassert(hdr);
    HDassert(nelmts > 0);

    /* Compute the index of the element buffer factory */
    H5_CHECK_OVERFLOW(nelmts, /*From:*/size_t, /*To:*/uint32_t);
    idx = H5V_log2_of2((uint32_t)nelmts) - H5V_log2_of2((uint32_t)hdr->cparam.data_blk_min_elmts);
#ifdef QAK
HDfprintf(stderr, "%s: nelmts = %Zu, hdr->data_blk_min_elmts = %u, idx = %u\n", FUNC, nelmts, (unsigned)hdr->data_blk_min_elmts, idx);
#endif /* QAK */

    /* Check for needing to increase size of array of factories */
    if(idx >= hdr->elmt_fac.nalloc) {
        H5FL_fac_head_t **new_fac;      /* New array of element factories */
        size_t new_nalloc = MAX3(1, (idx + 1), (2 * hdr->elmt_fac.nalloc));   /* New number of factories allocated */

        /* Re-allocate array of element factories */
        if(NULL == (new_fac = H5FL_SEQ_REALLOC(H5FL_fac_head_ptr_t, hdr->elmt_fac.fac, new_nalloc)))
            H5E_THROW(H5E_CANTALLOC, "memory allocation failed for data block data element buffer factory array")

        /* Zero out new elements allocated */
        HDmemset(new_fac + hdr->elmt_fac.nalloc, 0, (new_nalloc - hdr->elmt_fac.nalloc) * sizeof(H5FL_fac_head_ptr_t));

        /* Update information about element factories in header */
        hdr->elmt_fac.nalloc = new_nalloc;
        hdr->elmt_fac.fac = new_fac;
    } /* end if */

    /* Check for un-initialized factory at index */
    if(NULL == hdr->elmt_fac.fac[idx]) {
        if(NULL == (hdr->elmt_fac.fac[idx] = H5FL_fac_init(nelmts * (size_t)hdr->cparam.cls->nat_elmt_size)))
            H5E_THROW(H5E_CANTINIT, "can't create data block data element buffer factory")
    } /* end if */

    /* Allocate buffer for elements in index block */
    if(NULL == (elmts = H5FL_FAC_MALLOC(hdr->elmt_fac.fac[idx])))
        H5E_THROW(H5E_CANTALLOC, "memory allocation failed for data block data element buffer")

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

CATCH
    if(!ret_value)
        if(elmts)
            (void)H5FL_FAC_FREE(hdr->elmt_fac.fac[idx], elmts);

END_FUNC(PKG)   /* end H5EA__hdr_alloc_elmts() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_free_elmts
 *
 * Purpose:	Free extensible array data block elements
 *
 * Return:	SUCCEED/FAIL
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Sep 18 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, NOERR,
herr_t, SUCCEED, -,
H5EA__hdr_free_elmts(H5EA_hdr_t *hdr, size_t nelmts, void *elmts))

    /* Local variables */
    unsigned idx;               /* Index of element buffer factory in header */

    /* Check arguments */
    HDassert(hdr);
    HDassert(nelmts > 0);
    HDassert(elmts);

    /* Compute the index of the element buffer factory */
    H5_CHECK_OVERFLOW(nelmts, /*From:*/size_t, /*To:*/uint32_t);
    idx = H5V_log2_of2((uint32_t)nelmts) - H5V_log2_of2((uint32_t)hdr->cparam.data_blk_min_elmts);
#ifdef QAK
HDfprintf(stderr, "%s: nelmts = %Zu, hdr->data_blk_min_elmts = %u, idx = %u\n", FUNC, nelmts, (unsigned)hdr->data_blk_min_elmts, idx);
#endif /* QAK */

    /* Free buffer for elements in index block */
    HDassert(idx < hdr->elmt_fac.nalloc);
    HDassert(hdr->elmt_fac.fac[idx]);
    (void)H5FL_FAC_FREE(hdr->elmt_fac.fac[idx], elmts);

END_FUNC(PKG)   /* end H5EA__hdr_free_elmts() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_create
 *
 * Purpose:	Creates a new extensible array header in the file
 *
 * Return:	SUCCEED/FAIL
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Jun 17 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
haddr_t, HADDR_UNDEF, HADDR_UNDEF,
H5EA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam,
    void *ctx_udata))

    /* Local variables */
    H5EA_hdr_t *hdr = NULL;     /* Extensible array header */

#ifdef QAK
HDfprintf(stderr, "%s: Called\n", FUNC);
#endif /* QAK */

    /* Check arguments */
    HDassert(f);
    HDassert(cparam);

#ifndef NDEBUG
{
    unsigned sblk_idx;          /* Super block index for first "actual" super block */
    size_t dblk_nelmts;         /* Number of data block elements */
    size_t dblk_page_nelmts;    /* Number of elements in a data block page */

    /* Check for valid parameters */
    if(cparam->raw_elmt_size == 0)
	H5E_THROW(H5E_BADVALUE, "element size must be greater than zero")
    if(cparam->max_nelmts_bits == 0)
	H5E_THROW(H5E_BADVALUE, "max. # of elements bits must be greater than zero")
    if(cparam->max_nelmts_bits > H5EA_MAX_NELMTS_IDX_MAX)
	H5E_THROW(H5E_BADVALUE, "max. # of elements bits must be <= %u", (unsigned)H5EA_MAX_NELMTS_IDX_MAX)
    if(cparam->sup_blk_min_data_ptrs < 2)
	H5E_THROW(H5E_BADVALUE, "min # of data block pointers in super block must be >= two")
    if(!POWER_OF_TWO(cparam->sup_blk_min_data_ptrs))
	H5E_THROW(H5E_BADVALUE, "min # of data block pointers in super block must be power of two")
    if(!POWER_OF_TWO(cparam->data_blk_min_elmts))
	H5E_THROW(H5E_BADVALUE, "min # of elements per data block must be power of two")
    dblk_page_nelmts = (size_t)1 << cparam->max_dblk_page_nelmts_bits;
    if(dblk_page_nelmts < cparam->idx_blk_elmts)
	H5E_THROW(H5E_BADVALUE, "# of elements per data block page must be greater than # of elements in index block")

    /* Compute the number of elements in data blocks for first actual super block */
    sblk_idx = H5EA_SBLK_FIRST_IDX(cparam->sup_blk_min_data_ptrs);
    dblk_nelmts = H5EA_SBLK_DBLK_NELMTS(sblk_idx, cparam->data_blk_min_elmts);
    if(dblk_page_nelmts < dblk_nelmts)
	H5E_THROW(H5E_BADVALUE, "max. # of elements per data block page bits must be > # of elements in first data block from super block")
        
    if(cparam->max_dblk_page_nelmts_bits > cparam->max_nelmts_bits)
	H5E_THROW(H5E_BADVALUE, "max. # of elements per data block page bits must be <= max. # of elements bits")
}
#endif /* NDEBUG */

    /* Allocate space for the shared information */
    if(NULL == (hdr = H5EA__hdr_alloc(f)))
	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for extensible array shared header")

    /* Set the internal parameters for the array */
    hdr->idx_blk_addr = HADDR_UNDEF;

    /* Set the creation parameters for the array */
    HDmemcpy(&hdr->cparam, cparam, sizeof(hdr->cparam));

    /* Finish initializing extensible array header */
    if(H5EA__hdr_init(hdr, ctx_udata) < 0)
	H5E_THROW(H5E_CANTINIT, "initialization failed for extensible array header")

    /* Allocate space for the header on disk */
    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_EARRAY_HDR, dxpl_id, (hsize_t)hdr->size)))
	H5E_THROW(H5E_CANTALLOC, "file allocation failed for extensible array header")

    /* Cache the new extensible array header */
    if(H5AC_set(f, dxpl_id, H5AC_EARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
	H5E_THROW(H5E_CANTINSERT, "can't add extensible array header to cache")

    /* Set address of array header to return */
    ret_value = hdr->addr;

CATCH
    if(!H5F_addr_defined(ret_value))
        if(hdr) {
            /* Release header's disk space */
            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_EARRAY_HDR, dxpl_id, hdr->addr, (hsize_t)hdr->size) < 0)
                H5E_THROW(H5E_CANTFREE, "unable to free extensible array header")

            /* Destroy header */
            if(H5EA__hdr_dest(hdr) < 0)
                H5E_THROW(H5E_CANTFREE, "unable to destroy extensible array header")
        } /* end if */

END_FUNC(PKG)   /* end H5EA__hdr_create() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_incr
 *
 * Purpose:	Increment component reference count on shared array header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Aug 26 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
herr_t, SUCCEED, FAIL,
H5EA__hdr_incr(H5EA_hdr_t *hdr))

    /* Sanity check */
    HDassert(hdr);

    /* Mark header as un-evictable when something is depending on it */
    if(hdr->rc == 0)
        if(H5AC_pin_protected_entry(hdr->f, hdr) < 0)
            H5E_THROW(H5E_CANTPIN, "unable to pin extensible array header")

    /* Increment reference count on shared header */
    hdr->rc++;

CATCH

END_FUNC(PKG)   /* end H5EA__hdr_incr() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_decr
 *
 * Purpose:	Decrement component reference count on shared array header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Aug 26 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
herr_t, SUCCEED, FAIL,
H5EA__hdr_decr(H5EA_hdr_t *hdr))

    /* Sanity check */
    HDassert(hdr);
    HDassert(hdr->rc);

    /* Decrement reference count on shared header */
    hdr->rc--;

    /* Mark header as evictable again when nothing depend on it */
    if(hdr->rc == 0) {
        HDassert(hdr->file_rc == 0);
        if(H5AC_unpin_entry(hdr->f, hdr) < 0)
            H5E_THROW(H5E_CANTUNPIN, "unable to unpin extensible array header")
    } /* end if */

CATCH

END_FUNC(PKG)   /* end H5EA__hdr_decr() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_fuse_incr
 *
 * Purpose:	Increment file reference count on shared array header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Aug 26 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, NOERR,
herr_t, SUCCEED, -,
H5EA__hdr_fuse_incr(H5EA_hdr_t *hdr))

    /* Sanity check */
    HDassert(hdr);

    /* Increment file reference count on shared header */
    hdr->file_rc++;

END_FUNC(PKG)   /* end H5EA__hdr_fuse_incr() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_fuse_decr
 *
 * Purpose:	Decrement file reference count on shared array header
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Aug 26 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, NOERR,
size_t, 0, -,
H5EA__hdr_fuse_decr(H5EA_hdr_t *hdr))

    /* Sanity check */
    HDassert(hdr);
    HDassert(hdr->file_rc);

    /* Decrement file reference count on shared header */
    hdr->file_rc--;

    /* Set return value */
    ret_value = hdr->file_rc;

END_FUNC(PKG)   /* end H5EA__hdr_fuse_decr() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_modified
 *
 * Purpose:	Mark an extensible array as modified
 *
 * Return:	SUCCEED/FAIL
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Sep  9 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
herr_t, SUCCEED, FAIL,
H5EA__hdr_modified(H5EA_hdr_t *hdr))

    /* Sanity check */
    HDassert(hdr);
    HDassert(hdr->f);

    /* Mark header as dirty in cache */
    if(H5AC_mark_pinned_or_protected_entry_dirty(hdr->f, hdr) < 0)
        H5E_THROW(H5E_CANTMARKDIRTY, "unable to mark extensible array header as dirty")

CATCH

END_FUNC(PKG)   /* end H5EA__hdr_modified() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_delete
 *
 * Purpose:	Delete an extensible array, starting with the header
 *
 * Return:	SUCCEED/FAIL
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Aug 26 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
herr_t, SUCCEED, FAIL,
H5EA__hdr_delete(H5EA_hdr_t *hdr, hid_t dxpl_id))

    /* Sanity check */
    HDassert(hdr);
    HDassert(!hdr->file_rc);

#ifndef NDEBUG
{
    unsigned hdr_status = 0;         /* Array header's status in the metadata cache */

    /* Check the array header's status in the metadata cache */
    if(H5AC_get_entry_status(hdr->f, hdr->addr, &hdr_status) < 0)
        H5E_THROW(H5E_CANTGET, "unable to check metadata cache status for array header")

    /* Sanity checks on array header */
    HDassert(hdr_status & H5AC_ES__IN_CACHE);
    HDassert(hdr_status & H5AC_ES__IS_PROTECTED);
} /* end block */
#endif /* NDEBUG */

    /* Check for index block */
    if(H5F_addr_defined(hdr->idx_blk_addr)) {
#ifdef QAK
HDfprintf(stderr, "%s: hdr->idx_blk_addr = %a\n", FUNC, hdr->idx_blk_addr);
#endif /* QAK */
        /* Delete index block */
        if(H5EA__iblock_delete(hdr, dxpl_id) < 0)
            H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array index block")
    } /* end if */

    /* Finished deleting header */
    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_HDR, hdr->addr, hdr, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
        H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
    hdr = NULL;

CATCH

    /* Unprotect the header, if an error occurred */
    if(hdr && H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
        H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")

END_FUNC(PKG)   /* end H5EA__hdr_delete() */


/*-------------------------------------------------------------------------
 * Function:	H5EA__hdr_dest
 *
 * Purpose:	Destroys an extensible array header in memory.
 *
 * Return:	Non-negative on success/Negative on failure
 *
 * Programmer:	Quincey Koziol
 *		koziol@hdfgroup.org
 *		Sep 11 2008
 *
 *-------------------------------------------------------------------------
 */
BEGIN_FUNC(PKG, ERR,
herr_t, SUCCEED, FAIL,
H5EA__hdr_dest(H5EA_hdr_t *hdr))

    /* Check arguments */
    HDassert(hdr);
    HDassert(hdr->rc == 0);

    /* Destroy the callback context */
    if(hdr->cb_ctx) {
        if((*hdr->cparam.cls->dst_context)(hdr->cb_ctx) < 0)
            H5E_THROW(H5E_CANTRELEASE, "unable to destroy extensible array client callback context")
    } /* end if */
    hdr->cb_ctx = NULL;

    /* Check for data block element buffer factory info to free */
    if(hdr->elmt_fac.fac) {
        unsigned u;         /* Local index variable */

        /* Sanity check */
        HDassert(hdr->elmt_fac.nalloc > 0);

        /* Iterate over factories, shutting them down */
        for(u = 0; u < hdr->elmt_fac.nalloc; u++) {
            /* Check if this factory has been initialized */
            if(hdr->elmt_fac.fac[u]) {
                if(H5FL_fac_term(hdr->elmt_fac.fac[u]) < 0)
                    H5E_THROW(H5E_CANTRELEASE, "unable to destroy extensible array header factory")
                hdr->elmt_fac.fac[u] = NULL;
            } /* end if */
        } /* end for */

        /* Free factory array */
        hdr->elmt_fac.fac = (H5FL_fac_head_t **)H5FL_SEQ_FREE(H5FL_fac_head_ptr_t, hdr->elmt_fac.fac);
    } /* end if */

    /* Free the super block info array */
    if(hdr->sblk_info)
        hdr->sblk_info = (H5EA_sblk_info_t *)H5FL_SEQ_FREE(H5EA_sblk_info_t, hdr->sblk_info);

    /* Free the shared info itself */
    hdr = H5FL_FREE(H5EA_hdr_t, hdr);

CATCH

END_FUNC(PKG)   /* end H5EA__hdr_dest() */