path: root/src/H5HFpkg.h

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/*
 * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
 *		Friday, February 24, 2006
 *
 * Purpose:	This file contains declarations which are visible only within
 *		the H5HF package.  Source files outside the H5HF package should
 *		include H5HFprivate.h instead.
 */
#ifndef H5HF_PACKAGE
#error "Do not include this file outside the H5HF package!"
#endif

#ifndef _H5HFpkg_H
#define _H5HFpkg_H

/* Get package's private header */
#include "H5HFprivate.h"

/* Other private headers needed by this file */
#include "H5ACprivate.h"	/* Metadata cache			*/
#include "H5AC2private.h"	/* Metadata cache			*/
#include "H5B2private.h"	/* v2 B-trees				*/
#include "H5FLprivate.h"	/* Free Lists                           */
#include "H5FSprivate.h"	/* File free space                      */
#include "H5SLprivate.h"	/* Skip lists				*/

/**************************/
/* Package Private Macros */
/**************************/

/* Set speculative read size for header message */
#define H5HF_SPEC_READ_SIZE(f) (    \
    H5HF_HDR_SIZE(f)                \
    + 50                           \
)

/* Size of signature information (on disk) */
#define H5HF_SIZEOF_MAGIC               4

/* Fractal heap signatures */
#define H5HF_HDR_MAGIC                  "FRHP"          /* Header */
#define H5HF_IBLOCK_MAGIC               "FHIB"          /* Indirect block */
#define H5HF_DBLOCK_MAGIC               "FHDB"          /* Direct block */

/* Size of checksum information (on disk) */
#define H5HF_SIZEOF_CHKSUM      4

/* "Standard" size of prefix information for fractal heap metadata */
#define H5HF_METADATA_PREFIX_SIZE(c) (                                        \
    H5HF_SIZEOF_MAGIC   /* Signature */                                       \
    + 1 /* Version */                                                         \
    + ((c) ? H5HF_SIZEOF_CHKSUM : 0) /* Metadata checksum */                  \
    )

/* Size of doubling-table information */
#define H5HF_DTABLE_INFO_SIZE(h) (                                            \
    2   /* Width of table (i.e. # of columns) */                              \
    + (h)->sizeof_size /* Starting block size */                              \
    + (h)->sizeof_size /* Maximum direct block size */                        \
    + 2 /* Max. size of heap (log2 of actual value - i.e. the # of bits) */   \
    + 2 /* Starting # of rows in root indirect block */                       \
    + (h)->sizeof_addr /* File address of table managed */                    \
    + 2 /* Current # of rows in root indirect block */                        \
    )

/* Flags for status byte */
#define H5HF_HDR_FLAGS_HUGE_ID_WRAPPED 0x01     /* "huge" object IDs have wrapped */
#define H5HF_HDR_FLAGS_CHECKSUM_DBLOCKS 0x02    /* checksum direct blocks */

/* Size of fractal heap header */
#define H5HF_HDR_SIZE(f) (                                                    \
    /* General metadata fields */                                             \
    H5HF_METADATA_PREFIX_SIZE(TRUE)                                           \
                                                                              \
    /* Fractal Heap Header specific fields */                                 \
                                                                              \
    /* General heap information */                                            \
    + 2 /* Heap ID len */                                                     \
    + 2 /* I/O filters' encoded len */                                        \
    + 1 /* Status flags */                                                    \
                                                                              \
    /* "Huge" object fields */                                                \
    + 4 /* Max. size of "managed" object */                                   \
    + H5F_SIZEOF_SIZE(f) /* Next ID for "huge" object */                      \
    + H5F_SIZEOF_ADDR(f) /* File address of "huge" object tracker B-tree  */  \
                                                                              \
    /* "Managed" object free space fields */                                  \
    + H5F_SIZEOF_SIZE(f) /* Total man. free space */                          \
    + H5F_SIZEOF_ADDR(f) /* File address of free section header */            \
                                                                              \
    /* Statistics fields */                                                   \
    + H5F_SIZEOF_SIZE(f) /* Size of man. space in heap */                     \
    + H5F_SIZEOF_SIZE(f) /* Size of man. space iterator offset in heap */     \
    + H5F_SIZEOF_SIZE(f) /* Size of alloacted man. space in heap */           \
    + H5F_SIZEOF_SIZE(f) /* Number of man. objects in heap */                 \
    + H5F_SIZEOF_SIZE(f) /* Size of huge space in heap */                     \
    + H5F_SIZEOF_SIZE(f) /* Number of huge objects in heap */                 \
    + H5F_SIZEOF_SIZE(f) /* Size of tiny space in heap */                     \
    + H5F_SIZEOF_SIZE(f) /* Number of tiny objects in heap */                 \
                                                                              \
    /* "Managed" object doubling table info */                                \
    + 2   /* Width of table (i.e. # of columns) */                            \
    + H5F_SIZEOF_SIZE(f) /* Starting block size */                            \
    + H5F_SIZEOF_SIZE(f) /* Maximum direct block size */                      \
    + 2 /* Max. size of heap (log2 of actual value - i.e. the # of bits) */   \
    + 2 /* Starting # of rows in root indirect block */                       \
    + H5F_SIZEOF_ADDR(f) /* File address of table managed */                  \
    + 2 /* Current # of rows in root indirect block */                        \
    )

/* Size of the fractal heap header on disk */
/* (this is the fixed-len portion, the variable-len I/O filter information
 *      follows this information, if there are I/O filters for the heap)
 */
#define H5HF_HEADER_SIZE(h)     (                                             \
    /* General metadata fields */                                             \
    H5HF_METADATA_PREFIX_SIZE(TRUE)                                           \
                                                                              \
    /* Fractal Heap Header specific fields */                                 \
                                                                              \
    /* General heap information */                                            \
    + 2 /* Heap ID len */                                                     \
    + 2 /* I/O filters' encoded len */                                        \
    + 1 /* Status flags */                                                    \
                                                                              \
    /* "Huge" object fields */                                                \
    + 4 /* Max. size of "managed" object */                                   \
    + (h)->sizeof_size /* Next ID for "huge" object */                        \
    + (h)->sizeof_addr /* File address of "huge" object tracker B-tree  */    \
                                                                              \
    /* "Managed" object free space fields */                                  \
    + (h)->sizeof_size /* Total man. free space */                            \
    + (h)->sizeof_addr /* File address of free section header */              \
                                                                              \
    /* Statistics fields */                                                   \
    + (h)->sizeof_size /* Size of man. space in heap */                       \
    + (h)->sizeof_size /* Size of man. space iterator offset in heap */       \
    + (h)->sizeof_size /* Size of alloacted man. space in heap */             \
    + (h)->sizeof_size /* Number of man. objects in heap */                   \
    + (h)->sizeof_size /* Size of huge space in heap */                       \
    + (h)->sizeof_size /* Number of huge objects in heap */                   \
    + (h)->sizeof_size /* Size of tiny space in heap */                       \
    + (h)->sizeof_size /* Number of tiny objects in heap */                   \
                                                                              \
    /* "Managed" object doubling table info */                                \
    + H5HF_DTABLE_INFO_SIZE(h) /* Size of managed obj. doubling-table info */ \
    )

/* Size of overhead for a direct block */
#define H5HF_MAN_ABS_DIRECT_OVERHEAD(h) (                                     \
    /* General metadata fields */                                             \
    H5HF_METADATA_PREFIX_SIZE(h->checksum_dblocks)                            \
                                                                              \
    /* Fractal heap managed, absolutely mapped direct block specific fields */ \
    + (h)->sizeof_addr          /* File address of heap owning the block */   \
    + (h)->heap_off_size        /* Offset of the block in the heap */         \
    )

/* Size of managed indirect block entry for a child direct block */
#define H5HF_MAN_INDIRECT_CHILD_DIR_ENTRY_SIZE(h) (                           \
    ((h)->filter_len > 0 ?                                                    \
        ((h)->sizeof_addr + (h)->sizeof_size + 4) : /* Size of entries for filtered direct blocks */ \
        (h)->sizeof_addr)             /* Size of entries for un-filtered direct blocks */ \
    )

/* Size of managed indirect block */
#define H5HF_IBLOCK_SIZE(h, r) (                                        \
    /* General metadata fields */                                             \
    H5HF_METADATA_PREFIX_SIZE(TRUE)                                           \
                                                                              \
    /* Fractal heap managed, absolutely mapped indirect block specific fields */ \
    + (h)->sizeof_addr          /* File address of heap owning the block */   \
    + (h)->heap_off_size        /* Offset of the block in the heap */         \
    + (MIN(r, (h)->man_dtable.max_direct_rows) * (h)->man_dtable.cparam.width * H5HF_MAN_INDIRECT_CHILD_DIR_ENTRY_SIZE(h)) /* Size of entries for direct blocks */ \
    + (((r > (h)->man_dtable.max_direct_rows) ? (r - (h)->man_dtable.max_direct_rows) : 0)  * (h)->man_dtable.cparam.width * (h)->sizeof_addr) /* Size of entries for indirect blocks */ \
    )

/* Size of managed indirect block */
#define H5HF_MAN_INDIRECT_SIZE(h, i) (                                        \
    /* General metadata fields */                                             \
    H5HF_METADATA_PREFIX_SIZE(TRUE)                                           \
                                                                              \
    /* Fractal heap managed, absolutely mapped indirect block specific fields */ \
    + (h)->sizeof_addr          /* File address of heap owning the block */   \
    + (h)->heap_off_size        /* Offset of the block in the heap */         \
    + (MIN((i)->nrows, (h)->man_dtable.max_direct_rows) * (h)->man_dtable.cparam.width * H5HF_MAN_INDIRECT_CHILD_DIR_ENTRY_SIZE(h)) /* Size of entries for direct blocks */ \
    + ((((i)->nrows > (h)->man_dtable.max_direct_rows) ? ((i)->nrows - (h)->man_dtable.max_direct_rows) : 0)  * (h)->man_dtable.cparam.width * (h)->sizeof_addr) /* Size of entries for indirect blocks */ \
    )


/* Compute the # of bytes required to store an offset into a given buffer size */
#define H5HF_SIZEOF_OFFSET_BITS(b)   (((b) + 7) / 8)
#define H5HF_SIZEOF_OFFSET_LEN(l)   H5HF_SIZEOF_OFFSET_BITS(H5V_log2_of2((unsigned)(l)))

/* Heap ID bit flags */
/* Heap ID version (2 bits: 6-7) */
#define H5HF_ID_VERS_CURR       0x00    /* Current version of ID format */
#define H5HF_ID_VERS_MASK       0xC0    /* Mask for getting the ID version from flags */
/* Heap ID type (2 bits: 4-5) */
#define H5HF_ID_TYPE_MAN        0x00    /* "Managed" object - stored in fractal heap blocks */
#define H5HF_ID_TYPE_HUGE       0x10    /* "Huge" object - stored in file directly */
#define H5HF_ID_TYPE_TINY       0x20    /* "Tiny" object - stored in heap ID directly */
#define H5HF_ID_TYPE_RESERVED   0x30    /* "?" object - reserved for future use */
#define H5HF_ID_TYPE_MASK       0x30    /* Mask for getting the ID type from flags */
/* Heap ID bits 0-3 reserved for future use */

/* Encode a "managed" heap ID */
#define H5HF_MAN_ID_ENCODE(i, h, o, l)                                        \
    *(i) = H5HF_ID_VERS_CURR | H5HF_ID_TYPE_MAN;                              \
    (i)++;                                                                    \
    UINT64ENCODE_VAR((i), (o), (h)->heap_off_size);                           \
    UINT64ENCODE_VAR((i), (l), (h)->heap_len_size)

/* Decode a "managed" heap ID */
#define H5HF_MAN_ID_DECODE(i, h, f, o, l)                                     \
    f = *(uint8_t *)i++;                                                      \
    UINT64DECODE_VAR((i), (o), (h)->heap_off_size);                           \
    UINT64DECODE_VAR((i), (l), (h)->heap_len_size)

/* Free space section types for fractal heap */
/* (values stored in free space data structures in file) */
#define H5HF_FSPACE_SECT_SINGLE         0       /* Section is a range of actual bytes in a direct block */
#define H5HF_FSPACE_SECT_FIRST_ROW      1       /* Section is first range of blocks in an indirect block row */
#define H5HF_FSPACE_SECT_NORMAL_ROW     2       /* Section is a range of blocks in an indirect block row */
#define H5HF_FSPACE_SECT_INDIRECT      3       /* Section is a span of blocks in an indirect block */

/* Flags for 'op' operations */
#define H5HF_OP_MODIFY          0x0001          /* Operation will modify object */
#define H5HF_OP_FLAGS           (H5HF_OP_MODIFY)        /* Bit-wise OR of all op flags */

/****************************/
/* Package Private Typedefs */
/****************************/

/* Doubling-table info */
typedef struct H5HF_dtable_t {
    /* Immutable, pre-set information for table */
    H5HF_dtable_cparam_t    cparam;     /* Creation parameters for table */

    /* Derived information (stored, varies during lifetime of table) */
    haddr_t     table_addr;     /* Address of first block for table */
                                /* Undefined if no space allocated for table */
    unsigned    curr_root_rows; /* Current number of rows in the root indirect block */
                                /* 0 indicates that the TABLE_ADDR field points
                                 * to direct block (of START_BLOCK_SIZE) instead
                                 * of indirect root block.
                                 */

    /* Computed information (not stored) */
    unsigned    max_root_rows;      /* Maximum # of rows in root indirect block */
    unsigned    max_direct_rows;    /* Maximum # of direct rows in any indirect block */
    unsigned    start_bits;         /* # of bits for starting block size (i.e. log2(start_block_size)) */
    unsigned    max_direct_bits;    /* # of bits for max. direct block size (i.e. log2(max_direct_size)) */
    unsigned    max_dir_blk_off_size;   /* Max. size of offsets in direct blocks */
    unsigned    first_row_bits;     /* # of bits in address of first row */
    hsize_t     num_id_first_row;   /* Number of IDs in first row of table */
    hsize_t     *row_block_size;    /* Block size per row of indirect block */
    hsize_t     *row_block_off;     /* Cumulative offset per row of indirect block */
    hsize_t     *row_tot_dblock_free;   /* Total free space in dblocks for this row */
                                    /* (For indirect block rows, it's the total
                                     * free space in all direct blocks referenced
                                     * from the indirect block)
                                     */
    size_t      *row_max_dblock_free;   /* Max. free space in dblocks for this row */
                                    /* (For indirect block rows, it's the maximum
                                     * free space in a direct block referenced
                                     * from the indirect block)
                                     */
} H5HF_dtable_t;

/* Fractal heap free list info (forward decl - defined in H5HFflist.c) */
typedef struct H5HF_freelist_t H5HF_freelist_t;

/* Forward decl indirect block info */
typedef struct H5HF_indirect_t H5HF_indirect_t;

/* Fractal heap block location */
typedef struct H5HF_block_loc_t {
    /* Necessary table fields */
    unsigned    row;            /* Row of block in doubling table             */
    unsigned    col;            /* Column of block in doubling table          */

    /* Derived/computed/cached table fields */
    unsigned    entry;          /* Entry of block in doubling table           */

    /* Infrastructure */
    H5HF_indirect_t *context;   /* Pointer to the indirect block containing the block */
    struct H5HF_block_loc_t *up;  /* Pointer to next level up in the stack of levels */
} H5HF_block_loc_t;

/* Fractal heap block iterator info */
typedef struct H5HF_block_iter_t {
    hbool_t ready;              /* Set if iterator is finished initializing   */
    H5HF_block_loc_t *curr;     /* Pointer to the current level information for iterator */
} H5HF_block_iter_t;

/* Fractal heap free space section info */
typedef struct H5HF_free_section_t {
    H5FS_section_info_t sect_info;              /* Free space section information (must be first in struct) */
    union {
        struct {
            H5HF_indirect_t *parent;            /* Indirect block parent for free section's direct block */
            unsigned par_entry;                 /* Entry of free section's direct block in parent indirect block */
        } single;
        struct {
            struct H5HF_free_section_t *under;  /* Pointer to indirect block underlying row section */
            unsigned    row;                    /* Row for range of blocks */
            unsigned    col;                    /* Column for range of blocks */
            unsigned    num_entries;            /* Number of entries covered */

            /* Fields that aren't stored */
            hbool_t     checked_out;            /* Flag to indicate that a row section is temporarily out of the free space manager */
        } row;
        struct {
            /* Holds either a pointer to an indirect block (if its "live") or
             *  the block offset of it's indirect block (if its "serialized")
             *  (This allows the indirect block that the section is within to
             *          be compared with other sections, whether it's serialized
             *          or not)
             */
            union {
                H5HF_indirect_t *iblock;        /* Indirect block for free section */
                hsize_t iblock_off;             /* Indirect block offset in "heap space" */
            } u;
            unsigned    row;                    /* Row for range of blocks */
            unsigned    col;                    /* Column for range of blocks */
            unsigned    num_entries;            /* Number of entries covered */

            /* Fields that aren't stored */
            struct H5HF_free_section_t *parent; /* Pointer to "parent" indirect section */
            unsigned    par_entry;              /* Entry within parent indirect section */
            hsize_t     span_size;              /* Size of space tracked, in "heap space" */
            unsigned    iblock_entries;         /* Number of entries in indirect block where section is located */
            unsigned    rc;                     /* Reference count of outstanding row & child indirect sections */
            unsigned    dir_nrows;              /* Number of direct rows in section */
            struct H5HF_free_section_t **dir_rows;  /* Array of pointers to outstanding row sections */
            unsigned    indir_nents;            /* Number of indirect entries in section */
            struct H5HF_free_section_t **indir_ents; /* Array of pointers to outstanding child indirect sections */
        } indirect;
    } u;
} H5HF_free_section_t;

/* The fractal heap header information */
/* (Each fractal heap header has certain information that is shared across all
 * the instances of blocks in that fractal heap)
 */
typedef struct H5HF_hdr_t {
    /* Information for H5AC cache functions, _must_ be first field in structure */
    H5AC2_info_t cache_info;

    /* General header information (stored in header) */
    unsigned    id_len;         /* Size of heap IDs (in bytes) */
    unsigned    filter_len;     /* Size of I/O filter information (in bytes) */

    /* Flags for heap settings (stored in status byte in header) */
    hbool_t     debug_objs;     /* Is the heap storing objects in 'debug' format */
    hbool_t     write_once;     /* Is heap being written in "write once" mode? */
    hbool_t     huge_ids_wrapped; /* Have "huge" object IDs wrapped around? */
    hbool_t     checksum_dblocks; /* Should the direct blocks in the heap be checksummed? */

    /* Doubling table information (partially stored in header) */
    /* (Partially set by user, partially derived/updated internally) */
    H5HF_dtable_t man_dtable;   /* Doubling-table info for managed objects */

    /* Free space information for managed objects (stored in header) */
    hsize_t     total_man_free; /* Total amount of free space in managed blocks */
    haddr_t     fs_addr;        /* Address of free space header on disk */

    /* "Huge" object support (stored in header) */
    uint32_t    max_man_size;   /* Max. size of object to manage in doubling table */
    hsize_t     huge_next_id;   /* Next ID to use for indirectly tracked 'huge' object */
    haddr_t     huge_bt2_addr;  /* Address of v2 B-tree for tracking "huge" object info */

    /* I/O filter support (stored in header, if any are used) */
    H5O_pline_t pline;          /* I/O filter pipeline for heap objects */
    size_t      pline_root_direct_size;    /* Size of filtered root direct block */
    unsigned    pline_root_direct_filter_mask; /* I/O filter mask for filtered root direct block */

    /* Statistics for heap (stored in header) */
    hsize_t     man_size;       /* Total amount of 'managed' space in heap */
    hsize_t     man_alloc_size; /* Total amount of allocated 'managed' space in heap */
    hsize_t     man_iter_off;   /* Offset of iterator in 'managed' heap space */
    hsize_t     man_nobjs;      /* Number of 'managed' objects in heap */
    hsize_t     huge_size;      /* Total size of 'huge' objects in heap */
    hsize_t     huge_nobjs;     /* Number of 'huge' objects in heap */
    hsize_t     tiny_size;      /* Total size of 'tiny' objects in heap */
    hsize_t     tiny_nobjs;     /* Number of 'tiny' objects in heap */

    /* Cached/computed values (not stored in header) */
    size_t      rc;             /* Reference count of heap's components using heap header */
    hbool_t     dirty;          /* Shared info is modified */
    haddr_t     heap_addr;      /* Address of heap header in the file */
    size_t      heap_size;      /* Size of heap header in the file */
    H5AC2_protect_t mode;        /* Access mode for heap */
    H5F_t      *f;              /* Pointer to file for heap */
    size_t      file_rc;        /* Reference count of files using heap header */
    hbool_t     pending_delete; /* Heap is pending deletion */
    size_t      sizeof_size;    /* Size of file sizes */
    size_t      sizeof_addr;    /* Size of file addresses */
    struct H5HF_indirect_t *root_iblock;    /* Pointer to pinned root indirect block */
    H5FS_t      *fspace;        /* Free space list for objects in heap */
    H5HF_block_iter_t next_block;   /* Block iterator for searching for next block with space */
    hsize_t     huge_max_id;    /* Max. 'huge' heap ID before rolling 'huge' heap IDs over */
    hbool_t     huge_ids_direct; /* Flag to indicate that 'huge' object's offset & length are stored directly in heap ID */
    size_t      tiny_max_len;   /* Max. size of tiny objects for this heap */
    hbool_t     tiny_len_extended; /* Flag to indicate that 'tiny' object's length is stored in extended form (i.e. w/extra byte) */
    unsigned char huge_id_size; /* Size of 'huge' heap IDs (in bytes) */
    unsigned char heap_off_size; /* Size of heap offsets (in bytes) */
    unsigned char heap_len_size; /* Size of heap ID lengths (in bytes) */
} H5HF_hdr_t;

/* Common indirect block doubling table entry */
/* (common between entries pointing to direct & indirect child blocks) */
typedef struct H5HF_indirect_ent_t {
    haddr_t     addr;           /* Direct block's address                     */
} H5HF_indirect_ent_t;

/* Extern indirect block doubling table entry for compressed direct blocks */
/* (only exists for indirect blocks in heaps that have I/O filters) */
typedef struct H5HF_indirect_filt_ent_t {
    size_t     size;            /* Size of child direct block, after passing though I/O filters */
    unsigned	filter_mask;	/* Excluded filters for child direct block */
} H5HF_indirect_filt_ent_t;

/* Fractal heap indirect block */
struct H5HF_indirect_t {
    /* Information for H5AC cache functions, _must_ be first field in structure */
    H5AC2_info_t cache_info;

    /* Internal heap information (not stored) */
    size_t      rc;             /* Reference count of objects using this block */
    H5HF_hdr_t	*hdr;	        /* Shared heap header info	              */
    struct H5HF_indirect_t *parent;	/* Shared parent indirect block info  */
    unsigned    par_entry;      /* Entry in parent's table                    */
    haddr_t     addr;           /* Address of this indirect block on disk     */
    size_t      size;           /* Size of indirect block on disk             */
    unsigned    nrows;          /* Total # of rows in indirect block          */
    unsigned    max_rows;       /* Max. # of rows in indirect block           */
    unsigned    nchildren;      /* Number of child blocks                     */
    unsigned    max_child;      /* Max. offset used in child entries          */
    struct H5HF_indirect_t **child_iblocks; /* Array of pointers to pinned child indirect blocks */

    /* Stored values */
    hsize_t     block_off;      /* Offset of the block within the heap's address space */
    H5HF_indirect_ent_t *ents;  /* Pointer to block entry table               */
    H5HF_indirect_filt_ent_t *filt_ents;    /* Pointer to filtered information for direct blocks */
};

/* A fractal heap direct block */
typedef struct H5HF_direct_t {
    /* Information for H5AC cache functions, _must_ be first field in structure */
    H5AC2_info_t cache_info;

    /* Internal heap information */
    H5HF_hdr_t	*hdr;	        /* Shared heap header info	              */
    H5HF_indirect_t *parent;	/* Shared parent indirect block info          */
    unsigned    par_entry;      /* Entry in parent's table                    */
    size_t      size;           /* Size of direct block                       */
    unsigned    blk_off_size;   /* Size of offsets in the block               */
    uint8_t     *blk;           /* Pointer to buffer containing block data    */

    /* Stored values */
    hsize_t     block_off;      /* Offset of the block within the heap's address space */
} H5HF_direct_t;

/* Fractal heap */
struct H5HF_t {
    H5HF_hdr_t  *hdr;           /* Pointer to internal fractal heap header info */
    H5F_t      *f;              /* Pointer to file for heap */
};

/* Fractal heap "parent info" (for loading a block) */
typedef struct H5HF_parent_t {
    H5HF_hdr_t *hdr;                /* Pointer to heap header info */
    H5HF_indirect_t *iblock;    /* Pointer to parent indirect block */
    unsigned entry;             /* Location of block in parent's entry table */
} H5HF_parent_t;

/* Typedef for indirectly accessed 'huge' object's records in the v2 B-tree */
typedef struct H5HF_huge_bt2_indir_rec_t {
    haddr_t addr;       /* Address of the object in the file */
    hsize_t len;        /* Length of the object in the file */
    hsize_t id;         /* ID used for object (not used for 'huge' objects directly accessed) */
} H5HF_huge_bt2_indir_rec_t;

/* Typedef for indirectly accessed, filtered 'huge' object's records in the v2 B-tree */
typedef struct H5HF_huge_bt2_filt_indir_rec_t {
    haddr_t addr;       /* Address of the filtered object in the file */
    hsize_t len;        /* Length of the filtered object in the file */
    unsigned filter_mask;   /* I/O pipeline filter mask for filtered object in the file */
    hsize_t obj_size;   /* Size of the de-filtered object in memory */
    hsize_t id;         /* ID used for object (not used for 'huge' objects directly accessed) */
} H5HF_huge_bt2_filt_indir_rec_t;

/* Typedef for directly accessed 'huge' object's records in the v2 B-tree */
typedef struct H5HF_huge_bt2_dir_rec_t {
    haddr_t addr;       /* Address of the object in the file */
    hsize_t len;        /* Length of the object in the file */
} H5HF_huge_bt2_dir_rec_t;

/* Typedef for directly accessed, filtered 'huge' object's records in the v2 B-tree */
typedef struct H5HF_huge_bt2_filt_dir_rec_t {
    haddr_t addr;       /* Address of the filtered object in the file */
    hsize_t len;        /* Length of the filtered object in the file */
    unsigned filter_mask;   /* I/O pipeline filter mask for filtered object in the file */
    hsize_t obj_size;   /* Size of the de-filtered object in memory */
} H5HF_huge_bt2_filt_dir_rec_t;

/* User data for free space section 'add' callback */
typedef struct {
    H5HF_hdr_t *hdr;            /* Fractal heap header */
    hid_t dxpl_id;              /* DXPL ID for operation */
} H5HF_sect_add_ud1_t;

/* User data for v2 B-tree 'remove' callback on 'huge' objects */
typedef struct {
    H5HF_hdr_t *hdr;            /* Fractal heap header (in) */
    hid_t dxpl_id;              /* DXPL ID for operation (in) */
    hsize_t obj_len;            /* Length of object removed (out) */
} H5HF_huge_remove_ud1_t;

/* User data for fractal heap header cache client callback */
typedef struct H5HF_hdr_cache_ud_t {
    H5F_t *f;                   /* File pointer */
    hid_t dxpl_id;              /* DXPL ID for operation (in) */
} H5HF_hdr_cache_ud_t;

/* User data for fractal heap indirect block cache client callbacks */
typedef struct H5HF_iblock_cache_ud_t {
    H5HF_parent_t * par_info;   /* Parent info */
    H5F_t * f;                  /* File pointer */
    const unsigned *nrows;      /* Number of rows */
} H5HF_iblock_cache_ud_t;

/* User data for fractal heap direct block cache client callbacks */
typedef struct H5HF_dblock_cache_ud_t {
    H5HF_parent_t par_info;     /* Parent info */
    H5F_t * f;                  /* File pointer */
    size_t dblock_size;		/* size of the direct block, which bears
				 * no necessary relation to the block 
				 * odi_size -- the size of the on disk 
				 * image of the block.  Note that the 
				 * metadata cache is only interested
				 * in the odi_size, and thus it is this 
				 * value that is passed to the cache in 
				 * calls to it.
				 */
    unsigned filter_mask;	/* Excluded filters for direct block */
} H5HF_dblock_cache_ud_t;


/*****************************/
/* Package Private Variables */
/*****************************/

/* H5HF header inherits cache-like properties from H5AC */
H5_DLLVAR const H5AC2_class_t H5AC2_FHEAP_HDR[1];

/* H5HF indirect block inherits cache-like properties from H5AC */
H5_DLLVAR const H5AC2_class_t H5AC2_FHEAP_IBLOCK[1];

/* H5HF direct block inherits cache-like properties from H5AC */
H5_DLLVAR const H5AC_class_t H5AC_FHEAP_DBLOCK[1];
H5_DLLVAR const H5AC2_class_t H5AC2_FHEAP_DBLOCK[1];

/* The v2 B-tree class for tracking indirectly accessed 'huge' objects */
H5_DLLVAR const H5B2_class_t H5HF_BT2_INDIR[1];

/* The v2 B-tree class for tracking indirectly accessed filtered 'huge' objects */
H5_DLLVAR const H5B2_class_t H5HF_BT2_FILT_INDIR[1];

/* The v2 B-tree class for tracking directly accessed 'huge' objects */
H5_DLLVAR const H5B2_class_t H5HF_BT2_DIR[1];

/* The v2 B-tree class for tracking directly accessed filtered 'huge' objects */
H5_DLLVAR const H5B2_class_t H5HF_BT2_FILT_DIR[1];

/* H5HF single section inherits serializable properties from H5FS_section_class_t */
H5_DLLVAR H5FS_section_class_t H5HF_FSPACE_SECT_CLS_SINGLE[1];

/* H5HF 'first' row section inherits serializable properties from H5FS_section_class_t */
H5_DLLVAR H5FS_section_class_t H5HF_FSPACE_SECT_CLS_FIRST_ROW[1];

/* H5HF 'normal' row section inherits serializable properties from H5FS_section_class_t */
H5_DLLVAR H5FS_section_class_t H5HF_FSPACE_SECT_CLS_NORMAL_ROW[1];

/* H5HF indirect section inherits serializable properties from H5FS_section_class_t */
H5_DLLVAR H5FS_section_class_t H5HF_FSPACE_SECT_CLS_INDIRECT[1];

/* Declare a free list to manage the H5HF_hdr_t struct */
H5FL_EXTERN(H5HF_hdr_t);

/* Declare a free list to manage the H5HF_indirect_t struct */
H5FL_EXTERN(H5HF_indirect_t);

/* Declare a free list to manage the H5HF_indirect_ent_t sequence information */
H5FL_SEQ_EXTERN(H5HF_indirect_ent_t);

/* Declare a free list to manage the H5HF_indirect_filt_ent_t sequence information */
H5FL_SEQ_EXTERN(H5HF_indirect_filt_ent_t);

/* Declare a free list to manage the H5HF_indirect_t * sequence information */
typedef H5HF_indirect_t *H5HF_indirect_ptr_t;
H5FL_SEQ_EXTERN(H5HF_indirect_ptr_t);

/* Declare a free list to manage the H5HF_direct_t struct */
H5FL_EXTERN(H5HF_direct_t);

/* Declare a free list to manage heap direct block data to/from disk */
H5FL_BLK_EXTERN(direct_block);


/******************************/
/* Package Private Prototypes */
/******************************/

/* Doubling table routines */
H5_DLL herr_t H5HF_dtable_init(H5HF_dtable_t *dtable);
H5_DLL herr_t H5HF_dtable_dest(H5HF_dtable_t *dtable);
H5_DLL herr_t H5HF_dtable_lookup(const H5HF_dtable_t *dtable, hsize_t off,
    unsigned *row, unsigned *col);
H5_DLL unsigned H5HF_dtable_size_to_row(const H5HF_dtable_t *dtable, size_t block_size);
H5_DLL unsigned H5HF_dtable_size_to_rows(const H5HF_dtable_t *dtable, hsize_t size);
H5_DLL hsize_t H5HF_dtable_span_size(const H5HF_dtable_t *dtable, unsigned start_row,
    unsigned start_col, unsigned num_entries);

/* Heap header routines */
H5_DLL H5HF_hdr_t * H5HF_hdr_alloc(H5F_t *f);
H5_DLL haddr_t H5HF_hdr_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam);
H5_DLL herr_t H5HF_hdr_finish_init_phase1(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_finish_init_phase2(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_finish_init(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_incr(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_decr(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_fuse_incr(H5HF_hdr_t *hdr);
H5_DLL size_t H5HF_hdr_fuse_decr(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_dirty(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_adj_free(H5HF_hdr_t *hdr, ssize_t amt);
H5_DLL herr_t H5HF_hdr_adjust_heap(H5HF_hdr_t *hdr, hsize_t new_size, hssize_t extra_free);
H5_DLL herr_t H5HF_hdr_inc_alloc(H5HF_hdr_t *hdr, size_t alloc_size);
H5_DLL herr_t H5HF_hdr_start_iter(H5HF_hdr_t *hdr, H5HF_indirect_t *iblock, hsize_t curr_off, unsigned curr_entry);
H5_DLL herr_t H5HF_hdr_skip_blocks(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_indirect_t *iblock, unsigned start_entry, unsigned nentries);
H5_DLL herr_t H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size);
H5_DLL herr_t H5HF_hdr_inc_iter(H5HF_hdr_t *hdr, hsize_t adv_size, unsigned nentries);
H5_DLL herr_t H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id,
    haddr_t dblock_addr);
H5_DLL herr_t H5HF_hdr_reset_iter(H5HF_hdr_t *hdr, hsize_t curr_off);
H5_DLL herr_t H5HF_hdr_empty(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_hdr_delete(H5HF_hdr_t *hdr, hid_t dxpl_id);
H5_DLL herr_t H5HF_hdr_dest(H5HF_hdr_t *hdr);

/* Indirect block routines */
H5_DLL herr_t H5HF_iblock_incr(H5HF_indirect_t *iblock);
H5_DLL herr_t H5HF_iblock_decr(H5HF_indirect_t *iblock);
H5_DLL herr_t H5HF_iblock_dirty(H5HF_indirect_t *iblock);
H5_DLL herr_t H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id,
    size_t min_dblock_size);
H5_DLL herr_t H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id,
    size_t min_dblock_size);
H5_DLL herr_t H5HF_man_iblock_alloc_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t **sec_node);
H5_DLL herr_t H5HF_man_iblock_create(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_indirect_t *par_iblock, unsigned par_entry, unsigned nrows,
    unsigned max_rows, haddr_t *addr_p);
H5_DLL H5HF_indirect_t *H5HF_man_iblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id,
    haddr_t iblock_addr, unsigned iblock_nrows,
    H5HF_indirect_t *par_iblock, unsigned par_entry, hbool_t must_protect,
    H5AC2_protect_t rw, hbool_t *did_protect);
H5_DLL herr_t H5HF_man_iblock_unprotect(H5HF_indirect_t *iblock, hid_t dxpl_id,
    unsigned cache_flags, hbool_t did_protect);
H5_DLL herr_t H5HF_man_iblock_attach(H5HF_indirect_t *iblock, unsigned entry,
    haddr_t dblock_addr);
H5_DLL herr_t H5HF_man_iblock_detach(H5HF_indirect_t *iblock, hid_t dxpl_id, unsigned entry);
H5_DLL herr_t H5HF_man_iblock_entry_addr(H5HF_indirect_t *iblock, unsigned entry,
    haddr_t *child_addr);
H5_DLL herr_t H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id,
    haddr_t iblock_addr, unsigned iblock_nrows, H5HF_indirect_t *par_iblock,
    unsigned par_entry);
H5_DLL herr_t H5HF_man_iblock_size(H5F_t *f, hid_t dxpl_id, H5HF_hdr_t *hdr,
    haddr_t iblock_addr, unsigned nrows, H5HF_indirect_t *par_iblock, unsigned par_entry, hsize_t *heap_size/*out*/);
H5_DLL herr_t H5HF_man_iblock_dest(H5HF_indirect_t *iblock);

/* Direct block routines */
H5_DLL herr_t H5HF_man_dblock_new(H5HF_hdr_t *fh, hid_t dxpl_id, size_t request,
    H5HF_free_section_t **ret_sec_node);
H5_DLL herr_t H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr,
    H5HF_indirect_t *par_iblock, unsigned par_entry, haddr_t *addr_p,
    H5HF_free_section_t **ret_sec_node);
H5_DLL herr_t H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_direct_t *dblock, haddr_t dblock_addr);
H5_DLL H5HF_direct_t *H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id,
    haddr_t dblock_addr, size_t dblock_size,
    H5HF_indirect_t *par_iblock, unsigned par_entry,
    H5AC2_protect_t rw);
H5_DLL herr_t H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id,
    hsize_t obj_off, H5HF_indirect_t **par_iblock,
    unsigned *par_entry, hbool_t *par_did_protect, H5AC2_protect_t rw);
H5_DLL herr_t H5HF_man_dblock_delete(H5F_t *f, hid_t dxpl_id, haddr_t dblock_addr,
    hsize_t dblock_size);
H5_DLL herr_t H5HF_man_dblock_dest(H5HF_direct_t *dblock);

/* Managed object routines */
H5_DLL herr_t H5HF_man_insert(H5HF_hdr_t *fh, hid_t dxpl_id, size_t obj_size,
    const void *obj, void *id);
H5_DLL herr_t H5HF_man_read(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id,
    void *obj);
H5_DLL herr_t H5HF_man_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
    const void *obj);
H5_DLL herr_t H5HF_man_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
    H5HF_operator_t op, void *op_data);
H5_DLL herr_t H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id);

/* 'Huge' object routines */
H5_DLL herr_t H5HF_huge_init(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_huge_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size,
    void *obj, void *id);
H5_DLL herr_t H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id,
    const uint8_t *id, size_t *obj_len_p);
H5_DLL herr_t H5HF_huge_read(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id,
    void *obj);
H5_DLL herr_t H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
    const void *obj);
H5_DLL herr_t H5HF_huge_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
    H5HF_operator_t op, void *op_data);
H5_DLL herr_t H5HF_huge_remove(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id);
H5_DLL herr_t H5HF_huge_term(H5HF_hdr_t *hdr, hid_t dxpl_id);
H5_DLL herr_t H5HF_huge_delete(H5HF_hdr_t *hdr, hid_t dxpl_id);

/* 'Tiny' object routines */
H5_DLL herr_t H5HF_tiny_init(H5HF_hdr_t *hdr);
H5_DLL herr_t H5HF_tiny_insert(H5HF_hdr_t *hdr, size_t obj_size, const void *obj,
    void *id);
H5_DLL herr_t H5HF_tiny_get_obj_len(H5HF_hdr_t *hdr, const uint8_t *id,
    size_t *obj_len_p);
H5_DLL herr_t H5HF_tiny_read(H5HF_hdr_t *fh, const uint8_t *id, void *obj);
H5_DLL herr_t H5HF_tiny_op(H5HF_hdr_t *hdr, const uint8_t *id,
    H5HF_operator_t op, void *op_data);
H5_DLL herr_t H5HF_tiny_remove(H5HF_hdr_t *fh, const uint8_t *id);

/* Debugging routines for dumping file structures */
H5_DLL herr_t H5HF_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
    FILE *stream, int indent, int fwidth);
H5_DLL herr_t H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
    FILE *stream, int indent, int fwidth, haddr_t hdr_addr, size_t nrec);
H5_DLL herr_t H5HF_iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
    FILE *stream, int indent, int fwidth, haddr_t hdr_addr, unsigned nrows);

/* Block iteration routines */
H5_DLL herr_t H5HF_man_iter_init(H5HF_block_iter_t *biter);
H5_DLL herr_t H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_block_iter_t *biter, hsize_t offset);
H5_DLL herr_t H5HF_man_iter_start_entry(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
    H5HF_indirect_t *iblock, unsigned start_entry);
H5_DLL herr_t H5HF_man_iter_set_entry(const H5HF_hdr_t *hdr,
    H5HF_block_iter_t *biter, unsigned entry);
H5_DLL herr_t H5HF_man_iter_next(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
    unsigned nentries);
H5_DLL herr_t H5HF_man_iter_up(H5HF_block_iter_t *biter);
H5_DLL herr_t H5HF_man_iter_down(H5HF_block_iter_t *biter, H5HF_indirect_t *iblock);
H5_DLL herr_t H5HF_man_iter_reset(H5HF_block_iter_t *biter);
H5_DLL herr_t H5HF_man_iter_curr(H5HF_block_iter_t *biter, unsigned *row, unsigned *col,
    unsigned *entry, H5HF_indirect_t **block);
H5_DLL herr_t H5HF_man_iter_offset(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
    hsize_t *offset);
H5_DLL hbool_t H5HF_man_iter_ready(H5HF_block_iter_t *biter);

/* Free space manipulation routines */
H5_DLL herr_t H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create);
H5_DLL herr_t H5HF_space_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *node, unsigned flags);
H5_DLL htri_t H5HF_space_find(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t request,
    H5HF_free_section_t **node);
H5_DLL herr_t H5HF_space_size(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t *fs_size);
H5_DLL herr_t H5HF_space_remove(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *node);
H5_DLL herr_t H5HF_space_close(H5HF_hdr_t *hdr, hid_t dxpl_id);
H5_DLL herr_t H5HF_space_delete(H5HF_hdr_t *hdr, hid_t dxpl_id);
H5_DLL herr_t H5HF_space_sect_change_class(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *sect, unsigned new_class);

/* Free space section routines */
H5_DLL H5HF_free_section_t *H5HF_sect_single_new(hsize_t sect_off,
    size_t sect_size, H5HF_indirect_t *parent, unsigned par_entry);
H5_DLL herr_t H5HF_sect_single_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *sect);
H5_DLL herr_t H5HF_sect_single_dblock_info(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *sect, haddr_t *dblock_addr, size_t *dblock_size);
H5_DLL herr_t H5HF_sect_single_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *sect, size_t amt);
H5_DLL herr_t H5HF_sect_row_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *sect);
H5_DLL herr_t H5HF_sect_row_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_free_section_t *sect, unsigned *entry_p);
H5_DLL H5HF_indirect_t *H5HF_sect_row_get_iblock(H5HF_free_section_t *sect);
H5_DLL herr_t H5HF_sect_indirect_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
    H5HF_indirect_t *iblock, unsigned start_entry, unsigned nentries);

/* Internal operator callbacks */
H5_DLL herr_t H5HF_op_read(const void *obj, size_t obj_len, void *op_data);
H5_DLL herr_t H5HF_op_write(const void *obj, size_t obj_len, void *op_data);

/* Testing routines */
#ifdef H5HF_TESTING
H5_DLL herr_t H5HF_get_cparam_test(const H5HF_t *fh, H5HF_create_t *cparam);
H5_DLL int H5HF_cmp_cparam_test(const H5HF_create_t *cparam1, const H5HF_create_t *cparam2);
H5_DLL unsigned H5HF_get_max_root_rows(const H5HF_t *fh);
H5_DLL unsigned H5HF_get_dtable_width_test(const H5HF_t *fh);
H5_DLL unsigned H5HF_get_dtable_max_drows_test(const H5HF_t *fh);
H5_DLL unsigned H5HF_get_iblock_max_drows_test(const H5HF_t *fh, unsigned pos);
H5_DLL hsize_t H5HF_get_dblock_size_test(const H5HF_t *fh, unsigned row);
H5_DLL hsize_t H5HF_get_dblock_free_test(const H5HF_t *fh, unsigned row);
H5_DLL herr_t H5HF_get_id_off_test(const H5HF_t *fh, const void *id, hsize_t *obj_off);
H5_DLL herr_t H5HF_get_id_type_test(const void *id, unsigned char *obj_type);
H5_DLL herr_t H5HF_get_tiny_info_test(const H5HF_t *fh, size_t *max_len,
    hbool_t *len_extended);
H5_DLL herr_t H5HF_get_huge_info_test(const H5HF_t *fh, hsize_t *next_id,
    hbool_t *ids_direct);
#endif /* H5HF_TESTING */

#endif /* _H5HFpkg_H */