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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 "H5FLprivate.h" /* Free Lists */
#include "H5FOprivate.h" /* File objects */
#include "H5Gprivate.h" /* Groups */
#include "H5Oprivate.h" /* Object header messages */
#include "H5RCprivate.h" /* Reference counted object functions */
/*
* 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
/* Superblock sizes for various versions */
/* Checksum size in the file */
#define H5F_SIZEOF_CHKSUM 4
/* Fixed-size portion at the beginning of all superblocks */
#define H5F_SUPERBLOCK_FIXED_SIZE ( H5F_SIGNATURE_LEN \
+ 3 /* superblock, freespace, and root group versions */ \
+ 1 /* reserved */ \
+ 3 /* shared header vers, size of address, size of lengths */ \
+ 1 /* reserved */ \
+ 4 /* group leaf k, group internal k */ \
+ 4) /* consistency flags */
#define H5F_SUPERBLOCK_VARLEN_SIZE_V0(f) \
( H5F_SIZEOF_ADDR(f) /* base address */ \
+ H5F_SIZEOF_ADDR(f) /* free space address */ \
+ H5F_SIZEOF_ADDR(f) /* EOF address */ \
+ H5F_SIZEOF_ADDR(f) /* driver block address */ \
+ H5G_SIZEOF_ENTRY(f)) /* root group ptr */
#define H5F_SUPERBLOCK_VARLEN_SIZE_V1(f) \
( 2 /* indexed B-tree internal k */ \
+ 2 /* reserved */ \
+ H5F_SIZEOF_ADDR(f) /* base address */ \
+ H5F_SIZEOF_ADDR(f) /* free space address */ \
+ H5F_SIZEOF_ADDR(f) /* EOF address */ \
+ H5F_SIZEOF_ADDR(f) /* driver block address */ \
+ H5G_SIZEOF_ENTRY(f)) /* root group ptr */
#define H5F_SUPERBLOCK_VARLEN_SIZE_V2(f) \
( 2 /* indexed B-tree internal k */ \
+ H5F_SIZEOF_ADDR(f) /* base address */ \
+ H5F_SIZEOF_ADDR(f) /* free space address */ \
/* + H5F_SIZEOF_ADDR(f) */ /* shared message table address */ \
/* JAMES + 2 */ /* shared message version and number of indexes */ \
+ H5F_SIZEOF_ADDR(f) /* EOF address */ \
+ H5F_SIZEOF_ADDR(f) /* driver block address */ \
+ H5G_SIZEOF_ENTRY(f) /* root group ptr */ \
+ H5F_SIZEOF_CHKSUM)
#define H5F_SUPERBLOCK_SIZE(v, f) ( H5F_SUPERBLOCK_FIXED_SIZE \
+ (v == 0 ? H5F_SUPERBLOCK_VARLEN_SIZE_V0(f) : 0) \
+ (v == 1 ? H5F_SUPERBLOCK_VARLEN_SIZE_V1(f) : 0) \
+ (v == 2 ? H5F_SUPERBLOCK_VARLEN_SIZE_V2(f) : 0))
#define H5F_DRVINFOBLOCK_HDR_SIZE 16
#define H5F_DRVINFO_CHKSUM(v) (v == 0 ? 0 : H5F_SIZEOF_CHKSUM)
/* Maximum size of super-block buffers */
#define H5F_MAX_SUPERBLOCK_SIZE 134
#define H5F_MAX_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
/*
* 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 {
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 */
unsigned flags; /* Access Permissions for file */
/* Cached values from FCPL */
unsigned sym_leaf_k; /* Size of leaves in symbol tables */
unsigned btree_k[H5B_NUM_BTREE_ID]; /* B-tree key values for each type */
size_t sizeof_addr; /* Size of addresses in file */
size_t sizeof_size; /* Size of offsets in file */
haddr_t super_addr; /* Absolute address of super block */
haddr_t base_addr; /* Absolute base address for rel.addrs. */
haddr_t extension_addr; /* Relative address of superblock extension */
H5O_shmesg_table_t sohm_table; /* Shared message table information */
haddr_t sohm_addr; /* Relative address of shared object header message table */
unsigned sohm_vers; /* Version of shared message table on disk */
unsigned sohm_nindexes; /* Number of shared messages indexes in the table */
haddr_t driver_addr; /* File driver information block address*/
hbool_t fam_to_sec2; /* Is h5repart changing driver from family to sec2 */
H5AC_t *cache; /* The object cache */
H5AC_cache_config_t
mdc_initCacheCfg; /* initial configuration for the */
/* metadata cache. This structure is */
/* fixed at creation time and should */
/* not change thereafter. */
hid_t fcpl_id; /* File creation property list ID */
H5F_close_degree_t fc_degree; /* File close behavior degree */
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? */
hbool_t latest_format; /* Always use the latest format? */
int ncwfs; /* Num entries on cwfs list */
struct H5HG_heap_t **cwfs; /* Global heap cache */
struct H5G_t *root_grp; /* Open root group */
H5FO_t *open_objs; /* Open objects in file */
H5RC_t *grp_btree_shared; /* Ref-counted group B-tree node info */
} 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 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*/
H5FO_t *obj_count; /* # of time each object is opened through top file structure */
hid_t file_id; /* ID of this file */
hbool_t closing; /* File is in the process of being closed */
H5F_mtab_t mtab; /* File mount table */
};
/*****************************/
/* Package Private Variables */
/*****************************/
/* Declare a free list to manage the H5F_t struct */
H5FL_EXTERN(H5F_t);
/* Declare a free list to manage the H5F_file_t struct */
H5FL_EXTERN(H5F_file_t);
/******************************/
/* Package Private Prototypes */
/******************************/
/* General routines */
H5_DLL herr_t H5F_init(void);
H5_DLL herr_t H5F_try_close(H5F_t *f);
H5_DLL haddr_t H5F_locate_signature(H5FD_t *file, hid_t dxpl_id);
/* File mount related routines */
H5_DLL herr_t H5F_close_mounts(H5F_t *f);
H5_DLL int H5F_term_unmount_cb(void *obj_ptr, hid_t obj_id, void *key);
H5_DLL herr_t H5F_mount_count_ids(H5F_t *f, unsigned *nopen_files, unsigned *nopen_objs);
/* Superblock related routines */
H5_DLL hsize_t H5F_init_superblock(const H5F_t *f, hid_t dxpl_id);
H5_DLL herr_t H5F_write_superblock(H5F_t *f, hid_t dxpl_id);
H5_DLL herr_t H5F_read_superblock(H5F_t *f, hid_t dxpl_id, H5G_loc_t *root_loc, haddr_t addr, uint8_t *buf, size_t buf_size);
/* Shared file list related routines */
H5_DLL herr_t H5F_sfile_add(H5F_file_t *shared);
H5_DLL H5F_file_t * H5F_sfile_search(H5FD_t *lf);
H5_DLL herr_t H5F_sfile_remove(H5F_file_t *shared);
/* Testing functions */
#ifdef H5F_TESTING
H5_DLL herr_t H5F_get_sohm_mesg_count_test(hid_t fid, unsigned type_id,
size_t *mesg_count);
#endif /* H5F_TESTING */
#endif /* _H5Fpkg_H */
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