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
|
/*-------------------------------------------------------------------------
* Copyright (C) 1997 National Center for Supercomputing Applications.
* All rights reserved.
*
*-------------------------------------------------------------------------
*
* Created: H5ACprivate.h
* Jul 9 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Constants and typedefs available to the rest of the
* library.
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
#ifndef _H5ACprivate_H
#define _H5ACprivate_H
#include <H5ACpublic.h> /*public prototypes */
/* Pivate headers needed by this header */
#include <H5private.h>
#include <H5Fprivate.h>
/*
* Feature: Define H5AC_DEBUG on the compiler command line if you want to
* debug H5AC_protect() and H5AC_unprotect() by insuring that
* nothing accesses protected objects. NDEBUG must not be defined
* in order for this to have any effect.
*/
#ifdef NDEBUG
# undef H5AC_DEBUG
#endif
/*
* Class methods pertaining to caching. Each type of cached object will
* have a constant variable with permanent life-span that describes how
* to cache the object. That variable will be of type H5AC_class_t and
* have the following required fields...
*
* LOAD: Loads an object from disk to memory. The function
* should allocate some data structure and return it.
*
* FLUSH: Writes some data structure back to disk. It would be
* wise for the data structure to include dirty flags to
* indicate whether it really needs to be written. This
* function is also responsible for freeing memory allocated
* by the LOAD method if the DEST argument is non-zero.
*/
typedef enum H5AC_subid_t {
H5AC_BT_ID = 0, /*B-tree nodes */
H5AC_SNODE_ID = 1, /*symbol table nodes */
H5AC_LHEAP_ID = 2, /*local heap */
H5AC_GHEAP_ID = 3, /*global heap */
H5AC_OHDR_ID = 4, /*object header */
H5AC_NTYPES = 5 /*THIS MUST BE LAST! */
} H5AC_subid_t;
typedef struct H5AC_class_t {
H5AC_subid_t id;
void *(*load)(H5F_t *, const haddr_t *addr,
const void *udata1, void *udata2);
herr_t (*flush)(H5F_t *, hbool_t dest,
const haddr_t *addr, void *thing);
} H5AC_class_t;
/*
* A cache has a certain number of entries. Objects are mapped into a
* cache entry by hashing the object's file address. Each file has its
* own cache, an array of slots.
*/
#define H5AC_NSLOTS 10330 /*prime number tend to work best */
#define H5AC_HASH(F,ADDR_P) H5F_addr_hash(ADDR_P,(F)->shared->cache->nslots)
typedef struct H5AC_prot_t {
const H5AC_class_t *type; /*type of protected thing */
haddr_t addr; /*address of protected thing */
void *thing; /*(possible) protected thing */
} H5AC_prot_t;
typedef struct H5AC_slot_t {
const H5AC_class_t *type; /*type of object stored here */
haddr_t addr; /*file address for object */
void *thing; /*the thing which is cached */
#ifdef H5AC_DEBUG
intn nprots; /*number of things protected */
intn aprots; /*nelmts of `prot' array */
H5AC_prot_t *prot; /*array of protected things */
#endif
} H5AC_slot_t;
typedef struct H5AC_t {
uintn nslots; /*number of cache slots */
H5AC_slot_t *slot; /*the cache slots */
intn nprots; /*number of protected objects */
struct {
uintn nhits; /*number of cache hits */
uintn nmisses; /*number of cache misses */
uintn ninits; /*number of cache inits */
uintn nflushes; /*number of flushes to disk */
} diagnostics[H5AC_NTYPES]; /*diagnostics for each type of object*/
} H5AC_t;
/*
* Library prototypes.
*/
herr_t H5AC_dest (H5F_t *f);
void *H5AC_find_f (H5F_t *f, const H5AC_class_t *type, const haddr_t *addr,
const void *udata1, void *udata2);
void *H5AC_protect (H5F_t *f, const H5AC_class_t *type, const haddr_t *addr,
const void *udata1, void *udata2);
herr_t H5AC_unprotect (H5F_t *f, const H5AC_class_t *type,
const haddr_t *addr, void *thing);
HDF5API herr_t H5AC_flush (H5F_t *f, const H5AC_class_t *type,
const haddr_t *addr, hbool_t destroy);
herr_t H5AC_create (H5F_t *f, intn size_hint);
herr_t H5AC_rename (H5F_t *f, const H5AC_class_t *type,
const haddr_t *old_addr, const haddr_t *new_addr);
herr_t H5AC_set (H5F_t *f, const H5AC_class_t *type, const haddr_t *addr,
void *thing);
herr_t H5AC_debug (H5F_t *f);
#define H5AC_find(F,TYPE,ADDR_P,UDATA1,UDATA2) \
(((F)->shared->cache->slot[H5AC_HASH(F,ADDR_P)].type==(TYPE) && \
H5F_addr_eq (&((F)->shared->cache->slot[H5AC_HASH(F,ADDR_P)].addr), \
ADDR_P)) ? \
((F)->shared->cache->diagnostics[(TYPE)->id].nhits++, \
(F)->shared->cache->slot[H5AC_HASH(F,ADDR_P)].thing) : \
H5AC_find_f (F, TYPE, ADDR_P, UDATA1, UDATA2))
#endif /* !_H5ACprivate_H */
|
