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
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5HFdblock.c
*
* Purpose: Direct block routines for fractal heaps.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#include "H5HFmodule.h" /* This source code file is part of the H5HF module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* File access */
#include "H5FLprivate.h" /* Free Lists */
#include "H5HFpkg.h" /* Fractal heaps */
#include "H5MFprivate.h" /* File memory management */
#include "H5VMprivate.h" /* Vectors and arrays */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/* Declare a free list to manage the H5HF_direct_t struct */
H5FL_DEFINE(H5HF_direct_t);
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_create
*
* Purpose: Allocate & initialize a managed direct block
*
* Return: Pointer to new direct block on success, NULL on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF__man_dblock_create(H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblock, unsigned par_entry, haddr_t *addr_p,
H5HF_free_section_t **ret_sec_node)
{
H5HF_free_section_t *sec_node; /* Pointer to free space section for block */
H5HF_direct_t *dblock = NULL; /* Pointer to direct block */
haddr_t dblock_addr; /* Direct block's address */
size_t free_space; /* Free space in new block */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(hdr);
/*
* Allocate file and memory data structures.
*/
if (NULL == (dblock = H5FL_MALLOC(H5HF_direct_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
"memory allocation failed for fractal heap direct block");
/* Reset the metadata cache info for the heap header */
memset(&dblock->cache_info, 0, sizeof(H5AC_info_t));
/* Share common heap information */
dblock->hdr = hdr;
if (H5HF__hdr_incr(hdr) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment reference count on shared heap header");
/* Set info for direct block */
if (par_iblock) {
unsigned par_row = par_entry / hdr->man_dtable.cparam.width; /* Row for block */
/* Compute offset & size, based on parent's information */
dblock->block_off = par_iblock->block_off;
dblock->block_off += hdr->man_dtable.row_block_off[par_row];
dblock->block_off +=
hdr->man_dtable.row_block_size[par_row] * (par_entry % hdr->man_dtable.cparam.width);
H5_CHECKED_ASSIGN(dblock->size, size_t, hdr->man_dtable.row_block_size[par_row], hsize_t);
} /* end if */
else {
/* Must be the root direct block */
dblock->block_off = 0;
dblock->size = hdr->man_dtable.cparam.start_block_size;
} /* end else */
dblock->file_size = 0;
free_space = dblock->size - H5HF_MAN_ABS_DIRECT_OVERHEAD(hdr);
/* Allocate buffer for block */
/* XXX: Change to using free-list factories */
if ((dblock->blk = H5FL_BLK_MALLOC(direct_block, dblock->size)) == NULL)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed");
memset(dblock->blk, 0, dblock->size);
dblock->write_buf = NULL;
dblock->write_size = 0;
/* Allocate [temporary] space for the direct block on disk */
if (H5F_USE_TMP_SPACE(hdr->f)) {
if (HADDR_UNDEF == (dblock_addr = H5MF_alloc_tmp(hdr->f, (hsize_t)dblock->size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
"file allocation failed for fractal heap direct block");
} /* end if */
else {
if (HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_DBLOCK, (hsize_t)dblock->size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL,
"file allocation failed for fractal heap direct block");
} /* end else */
/* Attach to parent indirect block, if there is one */
dblock->parent = par_iblock;
if (dblock->parent) {
if (H5HF__man_iblock_attach(dblock->parent, par_entry, dblock_addr) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't attach direct block to parent indirect block");
dblock->fd_parent = par_iblock;
} /* end if */
else
dblock->fd_parent = hdr;
dblock->par_entry = par_entry;
/* Create a new 'single' section for the free space in the block */
if (NULL == (sec_node = H5HF__sect_single_new((dblock->block_off + H5HF_MAN_ABS_DIRECT_OVERHEAD(hdr)),
free_space, dblock->parent, dblock->par_entry)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't create section for new direct block's free space");
/* Check what to do with section node */
if (ret_sec_node)
/* Pass back the pointer to the section instead of adding it to the free list */
*ret_sec_node = sec_node;
else {
/* Add new free space to the heap's list of space */
if (H5HF__space_add(hdr, sec_node, 0) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add direct block free space to global list");
} /* end else */
/* Cache the new fractal heap direct block */
if (H5AC_insert_entry(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add fractal heap direct block to cache");
/* Increase the allocated heap size */
if (H5HF__hdr_inc_alloc(hdr, dblock->size) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't increase allocated heap size");
/* Set the address of of direct block, if requested */
if (addr_p)
*addr_p = dblock_addr;
done:
if (ret_value < 0)
if (dblock)
if (H5HF__man_dblock_dest(dblock) < 0)
HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap direct block");
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_create() */
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_destroy
*
* Purpose: Destroy a managed direct block
*
* Note: This routine does _not_ insert a range section for the
* destroyed direct block, that must be handled by the
* caller.
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF__man_dblock_destroy(H5HF_hdr_t *hdr, H5HF_direct_t *dblock, haddr_t dblock_addr, bool *parent_removed)
{
hsize_t dblock_size; /* Size of direct block on disk */
unsigned cache_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting indirect block */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(hdr);
assert(dblock);
/* Check for I/O filters on this heap */
if (hdr->filter_len > 0) {
/* Check for root direct block */
if (dblock->parent == NULL)
/* Get direct block's actual size */
dblock_size = (hsize_t)hdr->pline_root_direct_size;
else {
H5HF_indirect_t *par_iblock; /* Parent indirect block */
unsigned par_entry; /* Entry in parent indirect block */
/* Get parent information */
par_iblock = dblock->parent;
par_entry = dblock->par_entry;
/* Get direct block's actual size */
dblock_size = (hsize_t)par_iblock->filt_ents[par_entry].size;
} /* end else */
} /* end if */
else
dblock_size = (hsize_t)dblock->size;
/* Reset the parent_removed flag */
if (parent_removed)
*parent_removed = false;
/* Check for root direct block */
if (hdr->man_dtable.curr_root_rows == 0) {
/* Sanity check */
assert(hdr->man_dtable.table_addr == dblock_addr);
assert(hdr->man_dtable.cparam.start_block_size == dblock->size);
/* Sanity check block iterator */
assert(!H5HF__man_iter_ready(&hdr->next_block));
/* Reset header information back to "empty heap" state */
if (H5HF__hdr_empty(hdr) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't make heap empty");
} /* end if */
else {
/* Adjust heap statistics */
hdr->man_alloc_size -= dblock->size;
/* Check for this direct block being the highest in the heap */
if ((dblock->block_off + dblock->size) == hdr->man_iter_off)
/* Move 'next block' iterator backwards (may shrink heap) */
if (H5HF__hdr_reverse_iter(hdr, dblock_addr) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't reverse 'next block' iterator");
/* Detach from parent indirect block */
if (dblock->parent) {
/* Destroy flush dependency between direct block and parent */
if (H5AC_destroy_flush_dependency(dblock->fd_parent, dblock) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency");
dblock->fd_parent = NULL;
/* If this is the last direct block for the indirect block, the
* indirect block will be removed when this direct block is detached
*/
if (parent_removed && 1 == dblock->parent->nchildren)
*parent_removed = true;
if (H5HF__man_iblock_detach(dblock->parent, dblock->par_entry) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't detach from parent indirect block");
dblock->parent = NULL;
dblock->par_entry = 0;
} /* end if */
} /* end else */
/* Indicate that the direct block should be deleted */
dblock->file_size = dblock_size;
cache_flags |= H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG;
/* If the dblock is in real file space, also tell the cache to free its file space */
if (!H5F_IS_TMP_ADDR(hdr->f, dblock_addr))
cache_flags |= H5AC__FREE_FILE_SPACE_FLAG;
done:
/* Unprotect the indirect block, with appropriate flags */
if (H5AC_unprotect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, cache_flags) < 0)
HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block");
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_destroy() */
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_new
*
* Purpose: Create a direct block large enough to hold an object of
* the requested size
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF__man_dblock_new(H5HF_hdr_t *hdr, size_t request, H5HF_free_section_t **ret_sec_node)
{
haddr_t dblock_addr; /* Address of new direct block */
size_t min_dblock_size; /* Min. size of direct block to allocate */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(hdr);
assert(request > 0);
/* Compute the min. size of the direct block needed to fulfill the request */
if (request < hdr->man_dtable.cparam.start_block_size)
min_dblock_size = hdr->man_dtable.cparam.start_block_size;
else {
min_dblock_size = ((size_t)1) << (1 + H5VM_log2_gen((uint64_t)request));
assert(min_dblock_size <= hdr->man_dtable.cparam.max_direct_size);
} /* end else */
/* Adjust the size of block needed to fulfill request, with overhead */
if (min_dblock_size < H5HF_MAN_ABS_DIRECT_OVERHEAD(hdr) + request)
min_dblock_size *= 2;
/* Check if this is the first block in the heap */
if (!H5_addr_defined(hdr->man_dtable.table_addr) &&
min_dblock_size == hdr->man_dtable.cparam.start_block_size) {
/* Create new direct block at starting offset */
if (H5HF__man_dblock_create(hdr, NULL, 0, &dblock_addr, ret_sec_node) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block");
/* Point root at new direct block */
hdr->man_dtable.curr_root_rows = 0;
hdr->man_dtable.table_addr = dblock_addr;
if (hdr->filter_len > 0) {
hdr->pline_root_direct_size = hdr->man_dtable.cparam.start_block_size;
hdr->pline_root_direct_filter_mask = 0;
} /* end if */
/* Extend heap to cover new direct block */
if (H5HF__hdr_adjust_heap(hdr, (hsize_t)hdr->man_dtable.cparam.start_block_size,
(hssize_t)hdr->man_dtable.row_tot_dblock_free[0]) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTEXTEND, FAIL, "can't increase space to cover root direct block");
} /* end if */
/* Root entry already exists, allocate direct block from root indirect block */
else {
H5HF_indirect_t *iblock; /* Pointer to indirect block to create */
unsigned next_row; /* Iterator's next block row */
unsigned next_entry; /* Iterator's next block entry */
size_t next_size; /* Size of next direct block to create */
/* Update iterator to reflect any previous increments as well as allow for requested direct block size
*/
if (H5HF__hdr_update_iter(hdr, min_dblock_size) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTUPDATE, FAIL, "unable to update block iterator");
/* Retrieve information about current iterator position */
if (H5HF__man_iter_curr(&hdr->next_block, &next_row, NULL, &next_entry, &iblock) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "unable to retrieve current block iterator location");
assert(next_row < iblock->nrows);
H5_CHECKED_ASSIGN(next_size, size_t, hdr->man_dtable.row_block_size[next_row], hsize_t);
/* Check for skipping over blocks */
if (min_dblock_size > next_size) {
fprintf(stderr,
"%s: Skipping direct block sizes not supported, min_dblock_size = %zu, next_size = %zu\n",
__func__, min_dblock_size, next_size);
HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "skipping direct block sizes not supported yet");
} /* end if */
/* Advance "next block" iterator to next direct block entry */
if (H5HF__hdr_inc_iter(hdr, (hsize_t)next_size, 1) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment 'next block' iterator");
/* Create new direct block at current location*/
if (H5HF__man_dblock_create(hdr, iblock, next_entry, &dblock_addr, ret_sec_node) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block");
} /* end else */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_new() */
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_protect
*
* Purpose: Convenience wrapper around H5AC_protect on a direct block
* (Use H5AC_unprotect to unprotect it for now)
*
* Return: Pointer to direct block on success, NULL on failure
*
*-------------------------------------------------------------------------
*/
H5HF_direct_t *
H5HF__man_dblock_protect(H5HF_hdr_t *hdr, haddr_t dblock_addr, size_t dblock_size,
H5HF_indirect_t *par_iblock, unsigned par_entry, unsigned flags)
{
H5HF_direct_t *dblock; /* Direct block from cache */
H5HF_dblock_cache_ud_t udata; /* parent and other info for deserializing direct block */
H5HF_direct_t *ret_value = NULL; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(hdr);
assert(H5_addr_defined(dblock_addr));
assert(dblock_size > 0);
/* only H5AC__READ_ONLY_FLAG may appear in flags */
assert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
/* Set up parent info */
udata.par_info.hdr = hdr;
udata.par_info.iblock = par_iblock;
udata.par_info.entry = par_entry;
/* set up the file pointer in the user data */
udata.f = hdr->f;
/* set up the direct block size */
udata.dblock_size = dblock_size;
/* compute the on disk image size -- observe that odi_size and
* dblock_size will be identical if there is no filtering.
*/
if (hdr->filter_len > 0) {
if (par_iblock == NULL) {
udata.odi_size = hdr->pline_root_direct_size;
udata.filter_mask = hdr->pline_root_direct_filter_mask;
} /* end if */
else {
/* Sanity check */
assert(H5_addr_eq(par_iblock->ents[par_entry].addr, dblock_addr));
/* Set up parameters to read filtered direct block */
udata.odi_size = par_iblock->filt_ents[par_entry].size;
udata.filter_mask = par_iblock->filt_ents[par_entry].filter_mask;
} /* end else */
} /* end if */
else {
udata.odi_size = dblock_size;
udata.filter_mask = 0;
} /* end else */
/* Reset compression context info */
udata.decompressed = false;
udata.dblk = NULL;
/* Protect the direct block */
if (NULL ==
(dblock = (H5HF_direct_t *)H5AC_protect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, &udata, flags)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap direct block");
/* Set the return value */
ret_value = dblock;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_protect() */
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_locate
*
* Purpose: Locate a direct block in a managed heap
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF__man_dblock_locate(H5HF_hdr_t *hdr, hsize_t obj_off, H5HF_indirect_t **ret_iblock, unsigned *ret_entry,
bool *ret_did_protect, unsigned flags)
{
haddr_t iblock_addr; /* Indirect block's address */
H5HF_indirect_t *iblock; /* Pointer to indirect block */
bool did_protect; /* Whether we protected the indirect block or not */
unsigned row, col; /* Row & column for object's block */
unsigned entry; /* Entry of block */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(hdr);
assert(hdr->man_dtable.curr_root_rows); /* Only works for heaps with indirect root block */
assert(ret_iblock);
assert(ret_did_protect);
/* only H5AC__READ_ONLY_FLAG may appear in flags */
assert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
/* Look up row & column for object */
if (H5HF__dtable_lookup(&hdr->man_dtable, obj_off, &row, &col) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of object");
/* Set initial indirect block info */
iblock_addr = hdr->man_dtable.table_addr;
/* Lock root indirect block */
if (NULL == (iblock = H5HF__man_iblock_protect(hdr, iblock_addr, hdr->man_dtable.curr_root_rows, NULL, 0,
false, flags, &did_protect)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block");
/* Check for indirect block row */
while (row >= hdr->man_dtable.max_direct_rows) {
H5HF_indirect_t *new_iblock; /* Pointer to new indirect block */
bool new_did_protect; /* Whether we protected the indirect block or not */
unsigned nrows; /* Number of rows in new indirect block */
unsigned cache_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting parent indirect block */
/* Compute # of rows in child indirect block */
nrows = (H5VM_log2_gen(hdr->man_dtable.row_block_size[row]) - hdr->man_dtable.first_row_bits) + 1;
assert(nrows < iblock->nrows); /* child must be smaller than parent */
/* Compute indirect block's entry */
entry = (row * hdr->man_dtable.cparam.width) + col;
/* Locate child indirect block */
iblock_addr = iblock->ents[entry].addr;
/* Check if we need to (re-)create the child indirect block */
if (!H5_addr_defined(iblock_addr)) {
if (H5HF__man_iblock_create(hdr, iblock, entry, nrows, nrows, &iblock_addr) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap indirect block");
/* Indicate that the parent indirect block was modified */
cache_flags |= H5AC__DIRTIED_FLAG;
} /* end if */
/* Lock child indirect block */
if (NULL == (new_iblock = H5HF__man_iblock_protect(hdr, iblock_addr, nrows, iblock, entry, false,
flags, &new_did_protect)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block");
/* Release the current indirect block */
if (H5HF__man_iblock_unprotect(iblock, cache_flags, did_protect) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block");
/* Switch variables to use new indirect block */
iblock = new_iblock;
did_protect = new_did_protect;
/* Look up row & column in new indirect block for object */
if (H5HF__dtable_lookup(&hdr->man_dtable, (obj_off - iblock->block_off), &row, &col) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of object");
assert(row < iblock->nrows); /* child must be smaller than parent */
} /* end while */
/* Set return parameters */
if (ret_entry)
*ret_entry = (row * hdr->man_dtable.cparam.width) + col;
*ret_iblock = iblock;
*ret_did_protect = did_protect;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_locate() */
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_delete
*
* Purpose: Delete a managed direct block
*
* Note: This routine does _not_ modify any indirect block that points
* to this direct block, it is assumed that the whole heap is
* being deleted. (H5HF__man_dblock_destroy modifies the indirect
* block)
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF__man_dblock_delete(H5F_t *f, haddr_t dblock_addr, hsize_t dblock_size)
{
unsigned dblock_status = 0; /* Direct block's status in the metadata cache */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(f);
assert(H5_addr_defined(dblock_addr));
assert(dblock_size > 0);
/* Check the direct block's status in the metadata cache */
if (H5AC_get_entry_status(f, dblock_addr, &dblock_status) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "unable to check metadata cache status for direct block");
/* If the direct block is in the cache, expunge it now */
if (dblock_status & H5AC_ES__IN_CACHE) {
/* Sanity checks on direct block */
assert(!(dblock_status & H5AC_ES__IS_PINNED));
assert(!(dblock_status & H5AC_ES__IS_PROTECTED));
/* Evict the direct block from the metadata cache */
if (H5AC_expunge_entry(f, H5AC_FHEAP_DBLOCK, dblock_addr, H5AC__NO_FLAGS_SET) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "unable to remove direct block from cache");
} /* end if */
/* Check if the direct block is NOT currently allocated in temp. file space */
/* (temp. file space does not need to be freed) */
if (!H5F_IS_TMP_ADDR(f, dblock_addr))
/* Release direct block's disk space */
/* (XXX: Under the best of circumstances, this block's space in the file
* would be freed in the H5AC_expunge_entry() call above (and the
* H5AC__FREE_FILE_SPACE_FLAG used there), but since the direct
* block structure might have a different size on disk than in
* the heap's 'abstract' address space, we would need to set the
* "file_size" field for the direct block structure. In order to
* do that, we'd have to protect/unprotect the direct block and
* that would add a bunch of unnecessary overhead to the process,
* so we just release the file space here, directly. -QAK)
*/
if (H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, dblock_addr, dblock_size) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap direct block file space");
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_delete() */
/*-------------------------------------------------------------------------
* Function: H5HF__man_dblock_dest
*
* Purpose: Destroys a fractal heap direct block in memory.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5HF__man_dblock_dest(H5HF_direct_t *dblock)
{
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/*
* Check arguments.
*/
assert(dblock);
/* Decrement reference count on shared fractal heap info */
assert(dblock->hdr != NULL);
if (H5HF__hdr_decr(dblock->hdr) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared heap header");
if (dblock->parent)
if (H5HF__iblock_decr(dblock->parent) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL,
"can't decrement reference count on shared indirect block");
/* Free block's buffer */
dblock->blk = H5FL_BLK_FREE(direct_block, dblock->blk);
/* Free fractal heap direct block info */
dblock = H5FL_FREE(H5HF_direct_t, dblock);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HF__man_dblock_dest() */
|