summaryrefslogtreecommitdiffstats
path: root/hl/src/H5PT.c
blob: 10b148beeeaaf53bc0f01aa8daa04c7e0c2dbcbe (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
/****************************************************************************
 * NCSA HDF                                                                 *
 * Scientific Data Technologies                                             *
 * National Center for Supercomputing Applications                          *
 * University of Illinois at Urbana-Champaign                               *
 * 605 E. Springfield, Champaign IL 61820                                   *
 *                                                                          *
 * For conditions of distribution and use, see the accompanying             *
 * hdf/COPYING file.                                                        *
 *                                                                          *
 ****************************************************************************/

#include "H5PT.h"
#include "H5HL_private.h"
#include <stdlib.h>

/*  Packet Table private data */

typedef struct
{
  hid_t dset_id;  /* The ID of the dataset containing this table */
  hid_t type_id;  /* The ID of the packet table's native datatype */
  hsize_t current_index;  /* The index of the packet that get_next_packet will read next */
  hsize_t size;  /* The number of packets currently contained in this table */
} htbl_t;

static hsize_t H5PT_ptable_count = 0;
static H5I_type_t H5PT_ptable_id_type = H5I_UNINIT;

#define H5PT_HASH_TABLE_SIZE 64

/* Packet Table private functions */
herr_t H5PT_close( htbl_t* table );
herr_t H5PT_create_index(htbl_t *table_id);
herr_t H5PT_set_index(htbl_t *table_id, hsize_t pt_index);

/*-------------------------------------------------------------------------
 *
 * Create/Open/Close functions
 *
 *-------------------------------------------------------------------------
 */

/*-------------------------------------------------------------------------
 * Function: H5PTcreate_fl
 *
 * Purpose: Creates a dataset containing a table and returns the Identifier
 *          of the table.
 *
 * Return: Success: table ID, Failure: Negative
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 12, 2004
 *
 * Comments: This function does not handle compression or fill data 
 *           currently.  Fill data is not necessary because the 
 *           table is initially of size 0.
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */

hid_t H5PTcreate_fl ( hid_t loc_id,
                              const char *dset_name,
                              hid_t dtype_id,
                              hsize_t chunk_size )
{
  htbl_t * table = NULL;
  hid_t dset_id = H5I_BADID;
  hid_t space_id = H5I_BADID;
  hid_t plist_id = H5I_BADID;
  hsize_t dims[1];
  hsize_t dims_chunk[1];
  hsize_t maxdims[1];
  hid_t ret_value;

  /* Register the packet table ID type if this is the first table created */
  if( H5PT_ptable_id_type < 0)
    if((H5PT_ptable_id_type = H5Iregister_type(H5PT_HASH_TABLE_SIZE, 0, (H5I_free_t)free)) <0)
      goto out;

  /* Get memory for the table identifier */
  table = (htbl_t *)malloc(sizeof(htbl_t));

  /* Create a simple data space with unlimited size */
  dims[0] = 0;
  dims_chunk[0] = chunk_size;
  maxdims[0] = H5S_UNLIMITED;
  if ( (space_id = H5Screate_simple( 1, dims, maxdims )) < 0 )
    goto out;

  /* Modify dataset creation properties to enable chunking  */
  plist_id = H5Pcreate (H5P_DATASET_CREATE);
  if ( H5Pset_chunk ( plist_id, 1, dims_chunk ) < 0 )
    goto out;

  /* Create the dataset. */
  if ( (dset_id=H5Dcreate( loc_id, dset_name, dtype_id, space_id, plist_id))<0 )
    goto out;

  /* Terminate access to the data space. */
  if ( H5Sclose( space_id ) < 0 )
    goto out;

  /* End access to the property list */
  if ( H5Pclose( plist_id ) < 0 )
    goto out;

  /* Create the table identifier */
  table->dset_id = dset_id;

  if((table->type_id = H5Tcopy(dtype_id)) <0)  
    goto out;

  H5PT_create_index(table);
  table->size = 0;

  /* Get an ID for this table */
  ret_value = H5Iregister(H5PT_ptable_id_type, table);

  if (ret_value != H5I_INVALID_HID)
    H5PT_ptable_count++;
  else
    H5PT_close(table);

  return ret_value;

  out:
    H5E_BEGIN_TRY
    H5Sclose(space_id);
    H5Pclose(plist_id);
    H5Dclose(dset_id);
    if(table)
      free(table);
    H5E_END_TRY
    return H5I_INVALID_HID;
}

/*-------------------------------------------------------------------------
 * Function: H5PTcreate_vl
 *
 * Purpose: Creates a dataset containing a table of variable length records
 *          and returns the Identifier of the table.
 *
 * Return: Success: table ID, Failure: Negative
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: April 12, 2004
 *
 * Comments: This function does not handle compression or fill data 
 *           currently.  Fill data is not necessary because the 
 *           table is initially of size 0.
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
hid_t H5PTcreate_vl ( hid_t loc_id,
                                 const char*dset_name,
                                 hsize_t chunk_size)
{
  hid_t ret_value=H5I_BADID;
  hid_t vltype;

  /* Create a variable length type that uses single bytes as its base type */
  vltype = H5Tvlen_create(H5T_NATIVE_UCHAR);
  if (vltype < 0)
    goto out;

  if((ret_value=H5PTcreate_fl(loc_id, dset_name, vltype, chunk_size)) <0)
    goto out;

  /* close the vltype */
  if (H5Tclose(vltype) < 0)
    goto out;

  return ret_value;

out:
  if(ret_value != H5I_BADID)
    H5PTclose(ret_value);
  return H5I_BADID;
}

/*-------------------------------------------------------------------------
 * Function: H5PTopen
 *
 * Purpose: Opens a dataset containing a table and returns the Identifier
 *          of the table.
 *
 * Return: Success: table ID, Failure: Negative
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 10, 2004
 *
 * Comments: 
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
hid_t H5PTopen( hid_t loc_id,
                             char *dset_name )
{
  hid_t type_id=H5I_BADID;
  hid_t space_id=H5I_BADID;
  htbl_t * table = NULL;
  hid_t ret_value;
  hsize_t dims[1];

  /* Register the packet table ID type if this is the first table created */
  if( H5PT_ptable_id_type < 0)
    if((H5PT_ptable_id_type = H5Iregister_type(H5PT_HASH_TABLE_SIZE, 0, (H5I_free_t)free))<0)
      goto out;

  table = (htbl_t *) malloc(sizeof(htbl_t));

  /* Open the dataset */
  if(( table->dset_id = H5Dopen(loc_id, dset_name)) <0);
  if (table->dset_id < 0)
    goto out;

  /* Get the dataset's disk datatype */
  if ((type_id = H5Dget_type(table->dset_id)) < 0)
    goto out;

  /* Get the table's native datatype */
  if ((table->type_id = H5Tget_native_type(type_id, H5T_DIR_ASCEND)) < 0)
    goto out;

  /* Initialize the current record pointer */
  if((H5PT_create_index(table)) <0)
    goto out;

  /* Get number of records in table */
  if((space_id=H5Dget_space(table->dset_id)) <0)
    goto out;
  if ( H5Sget_simple_extent_dims( space_id, dims, NULL) < 0 )
    goto out;
  table->size = dims[0];

  /* Get an ID for this table */
  ret_value = H5Iregister(H5PT_ptable_id_type, table);

  if (ret_value != H5I_INVALID_HID)
    H5PT_ptable_count++;
  else
    H5PT_close(table);

  return ret_value;

out:
  H5E_BEGIN_TRY
  H5Tclose(type_id);
  if(table)
  {
    H5Dclose(table->dset_id);
    H5Tclose(table->type_id);
    free(table);
  }
  H5E_END_TRY
  return H5I_INVALID_HID;
}


/*-------------------------------------------------------------------------
 * Function: H5PT_close
 *
 * Purpose: Closes a table (i.e. cleans up all open resources used by a 
 *          table).
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 10, 2004
 *
 * Comments: 
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PT_close( htbl_t* table)
{
  herr_t return_status = 0;

  if(table == NULL)
    goto out;

  /* Close the dataset */
  if (H5Dclose(table->dset_id) < 0)
    goto out;

  /* Close the memory datatype */
  if (H5Tclose(table->type_id) < 0)
    goto out;

  free(table);

  return 0;

out:
  if(table)
  {
    H5E_BEGIN_TRY
    H5Dclose(table->dset_id);
    H5Tclose(table->type_id);
    H5E_END_TRY
    free(table);
  }
  return -1;
}

/*-------------------------------------------------------------------------
 * Function: H5PTclose
 *
 * Purpose: Closes a table (i.e. cleans up all open resources used by a 
 *          table).
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: April 21, 2004
 *
 * Comments: 
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTclose( hid_t table_id )
{
  htbl_t * table;

  /* Remove the ID from the library */
  if((table = H5Iremove_verify(table_id, H5PT_ptable_id_type)) ==NULL)
    goto out;

  /* If the library found the table, remove it */
  if( H5PT_close(table) < 0)
    goto out;

  /* One less packet table open */
  H5PT_ptable_count--;

  /* Remove the packet table type ID if no more packet */
  /* tables are open                                   */
  if (H5PT_ptable_count == 0)
  {
    H5Idestroy_type(H5PT_ptable_id_type);
    H5PT_ptable_id_type = H5I_UNINIT;
  }

  return 0;

out:
  return -1;
}


/*-------------------------------------------------------------------------
 *
 * Write functions
 *
 *-------------------------------------------------------------------------
 */

/*-------------------------------------------------------------------------
 * Function: H5PTappend
 *
 * Purpose: Appends packets to the end of a packet table
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 12, 2004
 *
 * Comments: 
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTappend( hid_t table_id,
                           hsize_t nrecords,
                           const void * data )
{
  htbl_t * table;

  /* Find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    goto out;

  /* If we are asked to write 0 records, just do nothing */
  if (nrecords == 0)
    return 0;

  if((H5TBcommon_append_records(table->dset_id, table->type_id, 
  			nrecords, table->size, data)) <0)
    goto out;

  /* Update table size */
  table->size += nrecords;
  return 0;

out:
  return -1;
}

/*-------------------------------------------------------------------------
 *
 * Read functions
 *
 *-------------------------------------------------------------------------
 */


/*-------------------------------------------------------------------------
 * Function: H5PTget_next 
 *
 * Purpose: Reads packets starting at the current index and updates 
 *          that index
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 10, 2004
 *
 * Comments:
 *
 * Modifications: 
 *
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTget_next( hid_t table_id,
                             hsize_t nrecords,
                             void * data)
{
  htbl_t * table;

  /* Find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    goto out;

  /* If nrecords == 0, do nothing */
  if (nrecords == 0)
    return 0;

  if((H5TBcommon_read_records(table->dset_id, table->type_id, 
                              table->current_index, nrecords, table->size, data)) < 0)
    goto out;

  /* Update the current index */
  table->current_index += nrecords;
  return 0;

out:
  return -1;
}

/*-------------------------------------------------------------------------
 * Function: H5PTread_packets 
 *
 * Purpose: Reads packets from anywhere in a packet table
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 12, 2004
 *
 * Comments: 
 *
 * Modifications: 
 *
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTread_packets( hid_t table_id,
                         hsize_t start,
                         hsize_t nrecords,
                         void *data)
{
  htbl_t * table;

  /* find the table struct from its ID */
  table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type);
  if (table == NULL)
    goto out;

  /* If nrecords == 0, do nothing */
  if (nrecords == 0)
    return 0;

  if( H5TBcommon_read_records(table->dset_id, table->type_id, 
                              start, nrecords, table->size, data) < 0)
    goto out;

  return 0;

out:
  return -1;
}

/*-------------------------------------------------------------------------
 * 
 * Table attribute functions
 * 
 *-------------------------------------------------------------------------
 */

/*-------------------------------------------------------------------------
 * Function: H5PT_create_index, H5PT_set_index
 *
 * Purpose: Resets and sets the current record index for a packet table
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *  		   James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 12, 2004
 *
 * Comments: 
 *
 * Modifications: 
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PT_create_index(htbl_t *table)
{
  if( table != NULL)
  {
    table->current_index = 0;
    return 0;
  }
  return -1;
}

herr_t H5PT_set_index(htbl_t *table, hsize_t index)
{
  /* Ensure index is valid */
  if( table != NULL )
  {
    if( index < table->size )
    {
      table->current_index = index;
      return 0;
    }
  }
  return -1;
}

/*-------------------------------------------------------------------------
 * Function: H5PTcreate_index, H5PTset_index
 *
 * Purpose: Resets and sets the current record index for a packet table
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: April 23, 2004
 *
 * Comments: 
 *
 * Modifications: 
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTcreate_index(hid_t table_id)
{
  htbl_t * table;

  /* find the table struct from its ID */
  if((table = (htbl_t *) (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    return -1;

  return H5PT_create_index(table);
}

herr_t H5PTset_index(hid_t table_id, hsize_t pt_index)
{
  htbl_t * table;

  /* find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    return -1;

  return H5PT_set_index(table, pt_index);
}
/*-------------------------------------------------------------------------
 *
 * Inquiry functions
 *
 *-------------------------------------------------------------------------
 */

/*-------------------------------------------------------------------------
 * Function: H5PTget_num_packets 
 *
 * Purpose: Returns by reference the number of packets in the dataset
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 12, 2004
 *
 * Comments:
 *
 * Modifications: 
 *
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTget_num_packets( hid_t table_id, hsize_t *nrecords)
{
  htbl_t * table;

  /* find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    goto out;

  *nrecords = table->size;

  return 0;
out:
  return -1;
}


/*-------------------------------------------------------------------------
 * Function: H5PTis_valid 
 *
 * Purpose: Validates a table identifier
 *
 * Return: Success: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: March 12, 2004
 *
 * Comments:
 *
 * Modifications: 
 *
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTis_valid(hid_t table_id)
{
  htbl_t * table;

  /* find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) ==NULL)
    return -1;

  return 0;
}

/*-------------------------------------------------------------------------
 * Function: H5PTis_varlen 
 *
 * Purpose: Returns 1 if a table_id corresponds to a packet table of variable-
 *          length records or 0 for fixed-length records.
 *
 * Return: True: 1, False: 0, Failure: -1
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: April 14, 2004
 *
 * Comments:
 *
 * Modifications: 
 *
 *
 *-------------------------------------------------------------------------
 */
herr_t H5PTis_varlen(hid_t table_id)
{
  H5T_class_t type;
  htbl_t * table;

  /* find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    goto out;

  if((type = H5Tget_class( table->type_id )) == H5T_NO_CLASS)
    goto out;

  if( type == H5T_VLEN )
    return 1;
  else
    return 0;
out:
  return -1;
}

/*-------------------------------------------------------------------------
 * 
 * Memory Management functions
 * 
 *-------------------------------------------------------------------------
 */

/*-------------------------------------------------------------------------
 * Function: H5PTfree_vlen_readbuff
 *
 * Purpose: Frees memory used when reading from a variable length packet 
 *          table.
 *
 * Return: Success: 0, Failure: -1
 *          -2 if memory was reclaimed but another error occurred
 *
 * Programmer: Nat Furrer, nfurrer@ncsa.uiuc.edu
 *             James Laird, jlaird@ncsa.uiuc.edu
 *
 * Date: April 12, 2004
 *
 * Comments:
 *
 * Modifications: 
 *
 *
 *-------------------------------------------------------------------------
 */

herr_t H5PTfree_vlen_readbuff( hid_t table_id,
                               hsize_t bufflen,
                               void * buff )
{
  hid_t space_id = H5I_BADID;
  htbl_t * table;
  herr_t ret_value;

  /* find the table struct from its ID */
  if((table = (htbl_t *) H5Iobject_verify(table_id, H5PT_ptable_id_type)) == NULL)
    goto out;

  if ((space_id = H5Screate_simple(1, &bufflen, NULL)) < 0)
    goto out;

  /* Free the memory.  If this succeeds, ret_value should be 0. */
  if((ret_value = H5Dvlen_reclaim(table->type_id, space_id, H5P_DEFAULT, buff)) < 0)
    goto out;

  /* If the dataspace cannot be closed, return -2 to indicate that memory */
  /* was freed successfully but an error still occurred. */
  if(H5Sclose(space_id) < 0)
    return -2;

  return ret_value;

out:
  H5E_BEGIN_TRY
    H5Sclose(space_id);
  H5E_END_TRY
  return -1;
}