summaryrefslogtreecommitdiffstats
path: root/src/H5Fpkg.h
blob: 707b54655b033a6f030a9e3af40aa858546e6580 (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
/*
 * Copyright (C) 2000 NCSA
 *		      All rights reserved.
 *
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		Thursday, September 28, 2000
 *
 * Purpose:	This file contains declarations which are visible only within
 *		the H5F package.  Source files outside the H5F package should
 *		include H5Fprivate.h instead.
 */
#ifndef H5F_PACKAGE
#error "Do not include this file outside the H5F package!"
#endif

#ifndef _H5Fpkg_H
#define _H5Fpkg_H

#include <H5Fprivate.h>

/* This is a near top-level header! Try not to include much! */
#include <H5private.h>

/*
 * Feature: Define this constant to be non-zero if you want to enable code
 *	    that minimizes the number of calls to lseek().  This has a huge
 *	    performance benefit on some systems.  Set this constant to zero
 *	    on the compiler command line to disable that optimization.
 */
#ifndef H5F_OPT_SEEK
#  define H5F_OPT_SEEK 1
#endif

/*
 * Feature: Define this constant on the compiler command-line if you want to
 *	    see some debugging messages on the debug stream.
 */
#ifdef NDEBUG
#  undef H5F_DEBUG
#endif

/* Maximum size of boot-block buffer */
#define H5F_BOOTBLOCK_SIZE  1024

/* Define the HDF5 file signature */
#define H5F_SIGNATURE	  "\211HDF\r\n\032\n"
#define H5F_SIGNATURE_LEN 8

/*
 * Private file open flags.
 */
#define H5F_ACC_PUBLIC_FLAGS 	0x00ffu

/*
 * Macros that check for overflows.  These are somewhat dangerous to fiddle
 * with.
 */
#if (SIZEOF_SIZE_T >= SIZEOF_OFF_T)
#   define H5F_OVERFLOW_SIZET2OFFT(X)					      \
    ((size_t)(X)>=(size_t)((size_t)1<<(8*sizeof(off_t)-1)))
#else
#   define H5F_OVERFLOW_SIZET2OFFT(X) 0
#endif

/* The raw data chunk cache */
typedef struct H5F_rdcc_t {
    uintn		ninits;	/* Number of chunk creations		*/
    uintn		nhits;	/* Number of cache hits			*/
    uintn		nmisses;/* Number of cache misses		*/
    uintn		nflushes;/* Number of cache flushes		*/
    size_t		nbytes;	/* Current cached raw data in bytes	*/
    intn		nslots;	/* Number of chunk slots allocated	*/
    struct H5F_rdcc_ent_t *head; /* Head of doubly linked list		*/
    struct H5F_rdcc_ent_t *tail; /* Tail of doubly linked list		*/
    intn		nused;	/* Number of chunk slots in use		*/
    struct H5F_rdcc_ent_t **slot; /* Chunk slots, each points to a chunk*/
} H5F_rdcc_t;

/*
 * Define the structure to store the file information for HDF5 files. One of
 * these structures is allocated per file, not per H5Fopen(). That is, set of
 * H5F_t structs can all point to the same H5F_file_t struct. The `nrefs'
 * count in this struct indicates the number of H5F_t structs which are
 * pointing to this struct.
 */
typedef struct H5F_file_t {
    uintn	flags;		/* Access Permissions for file		*/
    H5FD_t	*lf; 		/* Lower level file handle for I/O	*/
    uintn	nrefs;		/* Ref count for times file is opened	*/
    uint32_t	consist_flags;	/* File Consistency Flags		*/
    haddr_t	boot_addr;	/* Absolute address of boot block	*/
    haddr_t	base_addr;	/* Absolute base address for rel.addrs. */
    haddr_t	freespace_addr;	/* Relative address of free-space info	*/
    haddr_t	driver_addr;	/* File driver information block address*/
    struct H5AC_t *cache;	/* The object cache			*/
    H5F_create_t *fcpl;		/* File-creation property list		*/
                            /* This actually ends up being a pointer to a */
                            /* H5P_t type, which is returned from H5P_copy */
                            /* But that's ok because we only access it like */
                            /* a H5F_create_t until we pass it back to */
                            /* H5P_close to release it - QAK */
    intn	mdc_nelmts;	/* Size of meta data cache (elements)	*/
    intn	rdcc_nelmts;	/* Size of raw data chunk cache (elmts)	*/
    size_t	rdcc_nbytes;	/* Size of raw data chunk cache	(bytes)	*/
    double	rdcc_w0;	/* Preempt read chunks first? [0.0..1.0]*/
    hsize_t	threshold;	/* Threshold for alignment		*/
    hsize_t	alignment;	/* Alignment				*/
    uintn	gc_ref;		/* Garbage-collect references?		*/
    struct H5G_t *root_grp;	/* Open root group			*/
    intn	ncwfs;		/* Num entries on cwfs list		*/
    struct H5HG_heap_t **cwfs;	/* Global heap cache			*/

    /* Data Sieve Buffering fields */
    unsigned char *sieve_buf;  /* Buffer to hold data sieve buffer */
    haddr_t sieve_loc;      /* File location (offset) of the data sieve buffer */
    hsize_t sieve_size;     /* Size of the data sieve buffer used (in bytes) */
    hsize_t sieve_buf_size; /* Size of the data sieve buffer allocated (in bytes) */
    unsigned sieve_dirty;   /* Flag to indicate that the data sieve buffer is dirty */

    H5F_rdcc_t	rdcc;		/* Raw data chunk cache			*/
} H5F_file_t;

/* A record of the mount table */
typedef struct H5F_mount_t {
    struct H5G_t	*group;	/* Mount point group held open		*/
    struct H5F_t	*file;	/* File mounted at that point		*/
} H5F_mount_t;
    
/*
 * The mount table describes what files are attached to (mounted on) the file
 * to which this table belongs.
 */
typedef struct H5F_mtab_t {
    struct H5F_t	*parent;/* Parent file				*/
    uintn		nmounts;/* Number of children which are mounted	*/
    uintn		nalloc;	/* Number of mount slots allocated	*/
    H5F_mount_t		*child;	/* An array of mount records		*/
} H5F_mtab_t;

/*
 * This is the top-level file descriptor.  One of these structures is
 * allocated every time H5Fopen() is called although they may contain pointers
 * to shared H5F_file_t structs. The reference count (nrefs) indicates the
 * number of times the file has been opened (the application can only open a
 * file once explicitly, but the library can open the file a second time to
 * indicate that the file is mounted on some other file).
 */
struct H5F_t {
    uintn		nrefs;		/* Reference count		*/
    uintn		intent;		/* The flags passed to H5F_open()*/
    char		*name;		/* Name used to open file	*/
    H5F_file_t		*shared;	/* The shared file info		*/
    uintn		nopen_objs;	/* Number of open object headers*/
    hid_t		closing;	/* H5I_FILE_CLOSING ID or zero	*/
    H5F_mtab_t		mtab;		/* File mount table		*/
};

#ifdef H5_HAVE_PARALLEL
__DLLVAR__  hbool_t H5_mpi_1_metawrite_g;
#endif /* H5_HAVE_PARALLEL */

/* Private functions, not part of the publicly documented API */
__DLL__ void H5F_encode_length_unusual(const H5F_t *f, uint8_t **p,
				       uint8_t *l);
__DLL__ H5F_t *H5F_open(const char *name, uintn flags, hid_t fcpl_id, 
			hid_t fapl_id);
__DLL__ herr_t H5F_close(H5F_t *f);
__DLL__ herr_t H5F_close_all(void);
__DLL__ herr_t H5F_flush_all(hbool_t invalidate);
__DLL__ herr_t H5F_debug(H5F_t *f, haddr_t addr, FILE * stream,
			 intn indent, intn fwidth);
__DLL__ herr_t H5F_istore_debug(H5F_t *f, haddr_t addr, FILE * stream,
				intn indent, intn fwidth, int ndims);
__DLL__ herr_t H5F_mountpoint(struct H5G_entry_t *find/*in,out*/);

/* Functions that operate on indexed storage */
__DLL__ herr_t H5F_istore_init (H5F_t *f);
__DLL__ herr_t H5F_istore_flush (H5F_t *f, hbool_t preempt);
__DLL__ herr_t H5F_istore_dest (H5F_t *f);
__DLL__ herr_t H5F_istore_stats (H5F_t *f, hbool_t headers);
__DLL__ herr_t H5F_istore_create(H5F_t *f,
				 struct H5O_layout_t *layout/*in,out*/);
__DLL__ herr_t H5F_istore_read(H5F_t *f, hid_t dxpl_id,
			       const struct H5O_layout_t *layout,
			       const struct H5O_pline_t *pline,
			       const struct H5O_fill_t *fill,
			       const hssize_t offset[], const hsize_t size[],
			       void *buf/*out*/);
__DLL__ herr_t H5F_istore_write(H5F_t *f, hid_t dxpl_id,
				const struct H5O_layout_t *layout,
				const struct H5O_pline_t *pline,
				const struct H5O_fill_t *fill,
				const hssize_t offset[], const hsize_t size[],
				const void *buf);
__DLL__ herr_t H5F_istore_allocate (H5F_t *f, hid_t dxpl_id,
				    const struct H5O_layout_t *layout,
				    const hsize_t *space_dim,
				    const struct H5O_pline_t *pline,
				    const struct H5O_fill_t *fill);

/* Functions that operate on contiguous storage wrt boot block */
__DLL__ herr_t H5F_contig_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, hsize_t size,
                hid_t dxpl_id, void *_buf/*out*/);
__DLL__ herr_t H5F_contig_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
                  hsize_t size, hid_t dxpl_id, const void *buf);

/* Functions for allocation/releasing chunks */
__DLL__ void * H5F_istore_chunk_alloc(size_t chunk_size);
__DLL__ void * H5F_istore_chunk_realloc(void *chunk, size_t new_size);

#endif