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
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: James Laird <jlaird@ncsa.uiuc.edu>
* Thursday, March 30, 2006
*
* Purpose: This file contains declarations which are visible only within
* the H5SM shared object header messages package. Source files
* outside the H5SM package should include H5SMprivate.h instead.
*/
#ifndef _H5SMpkg_H
#define _H5SMpkg_H
#include "H5SMprivate.h"
#include "H5B2private.h" /* B-trees */
#include "H5HFprivate.h" /* Fractal heaps */
/****************************/
/* Package Macros */
/****************************/
#define H5SM_LIST_MAGIC "SMLI"
#define H5SM_LIST_SIZEOF_MAGIC 4
#define H5SM_TABLE_MAGIC "SMTB"
#define H5SM_TABLE_SIZEOF_MAGIC 4
#define H5SM_SIZEOF_CHECKSUM 4
#define H5SM_SOHM_ENTRY_SIZE(f) (4 /* Hash value */ \
+ 4 /* reference count*/ \
+ sizeof(H5O_fheap_id_t)) /* size of heap ID on disk */
#define H5SM_TABLE_SIZE(f) ( H5SM_TABLE_SIZEOF_MAGIC \
+ H5SM_SIZEOF_CHECKSUM) /* Checksum */
#define H5SM_INDEX_HEADER_SIZE(f) (1 /* Whether index is a list or B-tree */ \
+ 1 /* Version of index format */ \
+ 2 /* Type of messages stored in the index */ \
+ 4 /* Minimum size of messages to share */ \
+ (3 * 2) /* B-tree cutoff, list cutoff, # of shared messages */ \
+ H5F_SIZEOF_ADDR(f) /* Location of list or B-tree */ \
+ H5F_SIZEOF_ADDR(f)) /* Address of heap */
#define H5SM_LIST_SIZE(f, num_mesg) H5SM_LIST_SIZEOF_MAGIC \
+ (H5SM_SOHM_ENTRY_SIZE(f) * num_mesg) \
+ H5SM_SIZEOF_CHECKSUM /* Checksum */
#define H5SM_B2_NODE_SIZE 512
#define H5SM_B2_SPLIT_PERCENT 100
#define H5SM_B2_MERGE_PERCENT 40
/****************************/
/* Package Typedefs */
/****************************/
/* There are a number of Shared Object Header Message-specific structs here.
*
* The H5SM_master_table_t is pointed to by the file superblock. Since a file
* can have more than one SOHM index, this table collects all the indexes into
* one place. It holds an array of H5SM_index_header_t structs.
*
* An H5SM_index_header_t is actually the for a given index. It holds
* the number of messages in the index, the types of messages in the index,
* etc. It also records whether the index is a list or a b-tree, and has
* the address of the list or b-tree.
*
* If the index is a list, the address in the index header should be given
* to the cache, which can load it into a H5SM_list_t struct. This is mostly
* just a header for the cache information; it contains a pointer back to
* the index header and an unsorted array of messages.
*
* These messages are H5SM_sohm_t structs. They hold the actual SOHM's
* address, hash value, and refcount.
*
* If the index is a b-tree, the H5SM_index_header_t struct holds the address
* of the b-tree instead of the address of a H5SM_list_t. The B-tree's nodes
* are still 'H5SM_sohm_t's.
*
* H5SM_mesg_key_t structs are used to search lists and B-trees for a certain
* message. They correspond to a message that hasn't yet been written to
* disk.
*/
/* Typedef for a SOHM index node */
typedef struct {
uint32_t hash; /* Hash value for OHM */
H5O_fheap_id_t fheap_id; /* ID of the OHM in the fractal heap */
hsize_t ref_count; /* Number of times this message is used */
} H5SM_sohm_t;
typedef enum {
H5SM_BADTYPE = -1,
H5SM_LIST, /* Index is an unsorted list */
H5SM_BTREE /* Index is a sorted B-tree */
} H5SM_index_type_t;
/* Typedef for searching an index (list or B-tree) */
typedef struct {
H5SM_sohm_t message; /* The message to find/insert.
* If the message doesn't yet have a
* heap ID, the heap ID will be 0. */
const void *encoding; /* The message encoded, or NULL */
size_t encoding_size; /* Size of the encoding, or 0 */
H5HF_t *fheap; /* The heap for this message type, open. */
} H5SM_mesg_key_t;
/* Typedef for a SOHM index header */
typedef struct {
unsigned mesg_types; /* Bit flag vector of message types */
size_t min_mesg_size; /* number of messages being tracked */
size_t list_max; /* >= this many messages, index with a B-tree */
size_t btree_min; /* <= this many messages, index with a list again */
size_t num_messages; /* number of messages being tracked */
H5SM_index_type_t index_type; /* Is the index a list or a B-tree? */
haddr_t index_addr; /* Address of the actual index (list or B-tree) */
haddr_t heap_addr; /* Address of the fheap used to store shared messages */
} H5SM_index_header_t;
/* Typedef for a SOHM list */
typedef struct {
/* Information for H5AC cache functions, _must_ be first field in structure */
H5AC_info_t cache_info;
H5SM_index_header_t *header; /* Pointer to the corresponding index header */
H5SM_sohm_t *messages; /* Actual list, stored as an array */
} H5SM_list_t;
/* Typedef for shared object header message master table */
typedef struct {
/* Information for H5AC cache functions, _must_ be first field in structure */
H5AC_info_t cache_info;
uint8_t num_indexes; /* Number of indexes */
H5SM_index_header_t *indexes; /* Array of num_indexes indexes */
} H5SM_master_table_t;
/*
* Data exchange structure to pass through the fractal heap layer for the
* H5HF_op function when computing a hash value for a message.
*/
typedef struct {
/* downward (internal) */
unsigned type_id; /* Message type */
/* upward */
uint32_t hash; /* Hash value */
} H5SM_fh_ud_gh_t;
/****************************/
/* Package Variables */
/****************************/
/* Declare free lists to manage H5SM structs */
H5FL_ARR_EXTERN(H5SM_index_header_t);
H5FL_EXTERN(H5SM_list_t);
H5FL_ARR_EXTERN(H5SM_sohm_t);
H5_DLLVAR const H5AC_class_t H5AC_SOHM_TABLE[1];
H5_DLLVAR const H5AC_class_t H5AC_SOHM_LIST[1];
H5_DLLVAR const H5B2_class_t H5SM_INDEX[1];
/****************************/
/* Package Prototypes */
/****************************/
/* General routines */
H5_DLL ssize_t H5SM_get_index(const H5SM_master_table_t *table, unsigned type_id);
H5_DLL size_t H5SM_find_in_list(H5SM_list_t *list,
const H5SM_mesg_key_t *key, size_t *empty_pos);
/* Encode and decode routines, used for B-tree and cache encoding/decoding */
H5_DLL herr_t H5SM_message_encode(const H5F_t *f, uint8_t *raw,
const void *native);
H5_DLL herr_t H5SM_message_decode(const H5F_t *f, const uint8_t *raw,
void *native);
/* Callbacks to give to B-tree traversals */
/* H5SM_message_compare is in H5SMbtree2.c, but is also used by list code
* in H5SM.c.
*/
H5_DLL herr_t H5SM_message_compare(const void *rec1,
const void *rec2);
/* H5B2_modify_t callbacks to adjust record's refcount. */
H5_DLL herr_t H5SM_incr_ref(void *record, void *op_data, hbool_t *changed);
H5_DLL herr_t H5SM_decr_ref(void *record, void *op_data, hbool_t *changed);
/* H5B2_remove_t callback to add messages to a list index */
H5_DLL herr_t H5SM_btree_convert_to_list_op(const void * record, void *op_data);
/* Fractal heap 'op' callback to compute hash value for message "in place" */
H5_DLL herr_t H5SM_get_hash_fh_cb(const void *obj, size_t obj_len, void *_udata);
/* Testing functions */
#ifdef H5SM_TESTING
H5_DLL herr_t H5SM_get_mesg_count_test(H5F_t *f, hid_t dxpl_id, unsigned type_id,
size_t *mesg_count);
#endif /* H5SM_TESTING */
#endif /* _H5SMpkg_H */
|
