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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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: 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
/* Get package's private header */
#include "H5Fprivate.h"
/* Other public headers needed by this file */
#include "H5Bpublic.h" /* B-tree header, for H5B_NUM_BTREE_ID */
/* Other private headers needed by this file */
#include "H5private.h" /* Generic Functions */
#include "H5FOprivate.h" /* File objects */
#include "H5Gprivate.h" /* Groups */
/*
* 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 super-block buffer */
#define H5F_SUPERBLOCK_SIZE 256
#define H5F_DRVINFOBLOCK_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 (H5_SIZEOF_SIZE_T >= H5_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
#if (H5_SIZEOF_HSIZE_T >= H5_SIZEOF_OFF_T)
# define H5F_OVERFLOW_HSIZET2OFFT(X) \
((hsize_t)(X)>=(hsize_t)((hsize_t)1<<(8*sizeof(off_t)-1)))
#else
# define H5F_OVERFLOW_HSIZET2OFFT(X) 0
#endif
/*
* 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 {
unsigned flags; /* Access Permissions for file */
H5FD_t *lf; /* Lower level file handle for I/O */
unsigned nrefs; /* Ref count for times file is opened */
uint32_t consist_flags; /* File Consistency Flags */
/* Cached values from FCPL */
size_t sizeof_addr; /* Size of addresses in file */
size_t sizeof_size; /* Size of offsets in file */
unsigned sym_leaf_k; /* Size of leaves in symbol tables */
unsigned btree_k[H5B_NUM_BTREE_ID]; /* B-tree key values for each type */
haddr_t super_addr; /* Absolute address of super 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*/
unsigned super_chksum; /* Superblock checksum */
unsigned drvr_chksum; /* Driver info block checksum */
H5AC_t *cache; /* The object cache */
hid_t fcpl_id; /* File creation property list ID */
int mdc_nelmts; /* Size of meta data cache (elements) */
size_t 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]*/
size_t sieve_buf_size; /* Size of the data sieve buffer allocated (in bytes) */
hsize_t threshold; /* Threshold for alignment */
hsize_t alignment; /* Alignment */
unsigned gc_ref; /* Garbage-collect references? */
struct H5G_t *root_grp; /* Open root group */
int ncwfs; /* Num entries on cwfs list */
struct H5HG_heap_t **cwfs; /* Global heap cache */
H5FO_t *open_objs; /* Open objects in file */
H5F_close_degree_t fc_degree; /* File close behavior degree */
void *raw_page; /* Pointer to raw B-tree node buffer */
} 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 */
unsigned nmounts;/* Number of children which are mounted */
unsigned 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 {
unsigned nrefs; /* Reference count */
unsigned intent; /* The flags passed to H5F_open()*/
char *name; /* Name used to open file */
H5F_file_t *shared; /* The shared file info */
unsigned nopen_objs; /* Number of open object headers*/
hid_t file_id; /* ID of this file */
hid_t closing; /* H5I_FILE_CLOSING ID or zero */
H5F_mtab_t mtab; /* File mount table */
};
/* Forward declarations for prototype arguments */
struct H5D_dxpl_cache_t;
struct H5D_dcpl_cache_t;
union H5D_storage_t;
/* Private functions, not part of the publicly documented API */
#ifdef NOT_YET
H5_DLL void H5F_encode_length_unusual(const H5F_t *f, uint8_t **p, uint8_t *l);
#endif /* NOT_YET */
H5_DLL herr_t H5F_mountpoint(struct H5G_entry_t *find/*in,out*/);
#endif
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