H5Opkg.h

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * 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 COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
#if !(defined H5O_FRIEND || defined H5O_MODULE)
#error "Do not include this file outside the H5O package!"
#endif
 
#ifndef _H5Opkg_H
#define _H5Opkg_H
 
/* Get package's private header */
#include "H5Oprivate.h"     /* Object headers           */
 
/* Other private headers needed by this file */
#include "H5ACprivate.h"        /* Metadata cache                       */
#include "H5FLprivate.h"    /* Free Lists                           */
 
/* Object header macros */
#define H5O_NMESGS  8       /*initial number of messages         */
#define H5O_NCHUNKS 2       /*initial number of chunks       */
#define H5O_MIN_SIZE    22      /* Min. obj header data size (must be big enough for a message prefix and a continuation message) */
#define H5O_MSG_TYPES   26              /* # of types of messages            */
#define H5O_MAX_CRT_ORDER_IDX 65535     /* Max. creation order index value   */
 
/* Versions of object header structure */
 
/* Initial version of the object header format */
#define H5O_VERSION_1       1
 
/* Revised version - leaves out reserved bytes and alignment padding, and adds
 *      magic number as prefix and checksum as suffix for all chunks.
 */
#define H5O_VERSION_2       2
 
/* The latest version of the format.  Look through the 'flush'
 *      and 'size' callback for places to change when updating this. */
#define H5O_VERSION_LATEST  H5O_VERSION_2
 
/*
 * Align messages on 8-byte boundaries because we would like to copy the
 * object header chunks directly into memory and operate on them there, even
 * on 64-bit architectures.  This allows us to reduce the number of disk I/O
 * requests with a minimum amount of mem-to-mem copies.
 *
 * Note: We no longer attempt to do this. - QAK, 10/16/06
 */
#define H5O_ALIGN_OLD(X)    (8 * (((X) + 7) / 8))
#define H5O_ALIGN_VERS(V, X)                              \
    (((V) == H5O_VERSION_1) ?                             \
        H5O_ALIGN_OLD(X)                          \
        :                                     \
        (X)                               \
    )
#define H5O_ALIGN_OH(O, X)                            \
     H5O_ALIGN_VERS((O)->version, X)
#define H5O_ALIGN_F(F, X)                               \
     H5O_ALIGN_VERS(MAX(H5O_VERSION_1, (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(F)]), X)
 
/* Size of checksum (on disk) */
#define H5O_SIZEOF_CHKSUM               4
 
/* ========= Object Creation properties ============ */
/* Default values for some of the object creation properties */
/* NOTE: The H5O_CRT_ATTR_MAX_COMPACT_DEF & H5O_CRT_ATTR_MIN_DENSE_DEF values
 *      are "built into" the file format, make certain existing files with
 *      default attribute phase change storage are handled correctly if they
 *      are changed.
 */
#define H5O_CRT_ATTR_MAX_COMPACT_DEF    8
#define H5O_CRT_ATTR_MIN_DENSE_DEF      6
#define H5O_CRT_OHDR_FLAGS_DEF          H5O_HDR_STORE_TIMES
 
/* Object header status flag definitions */
#define H5O_HDR_CHUNK0_1                0x00    /* Use 1-byte value for chunk #0 size */
#define H5O_HDR_CHUNK0_2                0x01    /* Use 2-byte value for chunk #0 size */
#define H5O_HDR_CHUNK0_4                0x02    /* Use 4-byte value for chunk #0 size */
#define H5O_HDR_CHUNK0_8                0x03    /* Use 8-byte value for chunk #0 size */
 
/*
 * Size of object header prefix.
 */
#define H5O_SIZEOF_HDR(O)                             \
    (((O)->version == H5O_VERSION_1)                          \
        ?                                     \
            H5O_ALIGN_OLD(1 +   /*version number    */            \
                1 +     /*reserved      */            \
                2 +     /*number of messages    */            \
                4 +     /*reference count   */            \
                4)      /*chunk data size   */            \
        :                                     \
            (H5_SIZEOF_MAGIC +  /*magic number      */            \
                1 +     /*version number    */            \
                1 +     /*flags         */            \
                (((O)->flags & H5O_HDR_STORE_TIMES) ? (               \
                  4 +       /*access time       */            \
                  4 +       /*modification time */            \
                  4 +       /*change time       */            \
                  4     /*birth time        */            \
                ) : 0) +                              \
                (((O)->flags & H5O_HDR_ATTR_STORE_PHASE_CHANGE) ? (       \
                  2 +       /*max compact attributes */           \
                  2     /*min dense attributes  */            \
                ) : 0) +                              \
                (1 << ((O)->flags & H5O_HDR_CHUNK0_SIZE)) + /*chunk 0 data size */ \
                H5O_SIZEOF_CHKSUM) /*checksum size  */            \
    )
 
/*
 * Size of object header message prefix
 */
#define H5O_SIZEOF_MSGHDR_VERS(V,C)                       \
    (((V) == H5O_VERSION_1)                               \
        ?                                     \
            H5O_ALIGN_OLD(2 +   /*message type      */            \
                2 +     /*sizeof message data   */            \
                1 +     /*flags                 */            \
                3)      /*reserved      */            \
        :                                     \
            (1 +        /*message type      */            \
                2 +         /*sizeof message data   */            \
                1 +     /*flags                 */            \
                ((C) ? (                              \
                  2     /*creation index        */            \
                ) : 0))                               \
    )
#define H5O_SIZEOF_MSGHDR_OH(O)                           \
    (unsigned)H5O_SIZEOF_MSGHDR_VERS((O)->version, (O)->flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED)
#define H5O_SIZEOF_MSGHDR_F(F, C)                             \
    (unsigned)H5O_SIZEOF_MSGHDR_VERS(MAX((H5F_STORE_MSG_CRT_IDX(F) ? H5O_VERSION_LATEST : H5O_VERSION_1), (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(F)]), (C))
 
/*
 * Size of chunk "header" for each chunk
 */
#define H5O_SIZEOF_CHKHDR_VERS(V)                         \
    (((V) == H5O_VERSION_1)                               \
        ?                                     \
            0 +     /*no magic #  */                      \
                0   /*no checksum */                      \
        :                                     \
            H5_SIZEOF_MAGIC +       /*magic #  */                 \
                H5O_SIZEOF_CHKSUM   /*checksum */                 \
    )
#define H5O_SIZEOF_CHKHDR_OH(O)                           \
    H5O_SIZEOF_CHKHDR_VERS((O)->version)
 
/*
 * Size of checksum for each chunk
 */
#define H5O_SIZEOF_CHKSUM_VERS(V)                         \
    (((V) == H5O_VERSION_1)                               \
        ?                                     \
            0       /*no checksum */                      \
        :                                     \
            H5O_SIZEOF_CHKSUM       /*checksum */                 \
    )
#define H5O_SIZEOF_CHKSUM_OH(O)                           \
    H5O_SIZEOF_CHKSUM_VERS((O)->version)
 
/* Input/output flags for decode functions */
#define H5O_DECODEIO_NOCHANGE           0x01u   /* IN: do not modify values */
#define H5O_DECODEIO_DIRTY              0x02u   /* OUT: message has been changed */
 
/* Macro to incremend ndecode_dirtied (only if we are debugging) */
#ifndef NDEBUG
#define INCR_NDECODE_DIRTIED(OH) (OH)->ndecode_dirtied++;
#else /* NDEBUG */
#define INCR_NDECODE_DIRTIED(OH) ;
#endif /* NDEBUG */
 
/* Load native information for a message, if it's not already present */
/* (Only works for messages with decode callback) */
#define H5O_LOAD_NATIVE(F, IOF, OH, MSG, ERR)                                 \
    if(NULL == (MSG)->native) {                                               \
        const H5O_msg_class_t   *msg_type = (MSG)->type;                      \
        unsigned                ioflags = (IOF);                              \
                                                                              \
        /* Decode the message */                                              \
        HDassert(msg_type->decode);                                           \
        if(NULL == ((MSG)->native = (msg_type->decode)((F), (OH), (MSG)->flags, &ioflags, (MSG)->raw_size, (MSG)->raw))) \
            HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, ERR, "unable to decode message") \
                                                                              \
        /* Mark the message dirty if it was changed by decoding */            \
        if((ioflags & H5O_DECODEIO_DIRTY) && (H5F_get_intent((F)) & H5F_ACC_RDWR)) { \
            (MSG)->dirty = TRUE;                                              \
            /* Increment the count of messages dirtied by decoding, but */    \
            /* only ifndef NDEBUG */                                          \
            INCR_NDECODE_DIRTIED(OH)                                          \
        }                                                                     \
                                                                              \
        /* Set the message's "shared info", if it's shareable */          \
        if((MSG)->flags & H5O_MSG_FLAG_SHAREABLE) {                           \
            HDassert(msg_type->share_flags & H5O_SHARE_IS_SHARABLE);          \
            H5O_UPDATE_SHARED((H5O_shared_t *)(MSG)->native, H5O_SHARE_TYPE_HERE, (F), msg_type->id, (MSG)->crt_idx, (OH)->chunk[0].addr) \
        } /* end if */                                                        \
                                                                              \
        /* Set the message's "creation index", if it has one */           \
        if(msg_type->set_crt_index) {                             \
            /* Set the creation index for the message */              \
            if((msg_type->set_crt_index)((MSG)->native, (MSG)->crt_idx) < 0)  \
                HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, ERR, "unable to set creation index") \
        } /* end if */                                \
    } /* end if */
 
/* Flags for a message class's "sharability" */
#define H5O_SHARE_IS_SHARABLE   0x01
#define H5O_SHARE_IN_OHDR       0x02
 
/* Set the object header size to speculatively read in */
/* (needs to be more than the object header prefix size to work at all and
 *      should be larger than the largest object type's default object header
 *      size to save the extra I/O operations) */
#define H5O_SPEC_READ_SIZE 512
 
 
/* The "message class" type */
struct H5O_msg_class_t {
    unsigned    id;             /*message type ID on disk   */
    const char  *name;              /*for debugging             */
    size_t  native_size;            /*size of native message    */
    unsigned    share_flags;            /* Message sharing settings */
    void    *(*decode)(H5F_t *, H5O_t *, unsigned, unsigned *, size_t, const uint8_t *);
    herr_t  (*encode)(H5F_t *, hbool_t, uint8_t *, const void *);
    void    *(*copy)(const void *, void *); /*copy native value         */
    size_t  (*raw_size)(const H5F_t *, hbool_t, const void *);/*sizeof encoded message  */
    herr_t  (*reset)(void *);       /*free nested data structs  */
    herr_t  (*free)(void *);        /*free main data struct  */
    herr_t  (*del)(H5F_t *, H5O_t *, void *);    /* Delete space in file referenced by this message */
    herr_t  (*link)(H5F_t *, H5O_t *, void *);   /* Increment any links in file reference by this message */
    herr_t  (*set_share)(void*, const H5O_shared_t*);   /* Set shared information */
    htri_t  (*can_share)(const void *); /* Is message allowed to be shared? */
    herr_t  (*pre_copy_file)(H5F_t *, const void *, hbool_t *, const H5O_copy_t *, void *); /*"pre copy" action when copying native value to file */
    void    *(*copy_file)(H5F_t *, void *, H5F_t *, hbool_t *, unsigned *, H5O_copy_t *, void *); /*copy native value to file */
    herr_t  (*post_copy_file)(const H5O_loc_t *, const void *, H5O_loc_t *, void *, unsigned *, H5O_copy_t *); /*"post copy" action when copying native value to file */
    herr_t      (*get_crt_index)(const void *, H5O_msg_crt_idx_t *);    /* Get message's creation index */
    herr_t      (*set_crt_index)(void *, H5O_msg_crt_idx_t);    /* Set message's creation index */
    herr_t  (*debug)(H5F_t*, const void*, FILE*, int, int);
};
 
struct H5O_mesg_t {
    const H5O_msg_class_t   *type;      /* type of message                  */
    hbool_t                 dirty;      /* raw out of date wrt native       */
    uint8_t                 flags;      /* message flags                    */
    H5O_msg_crt_idx_t       crt_idx;    /* message creation index           */
    unsigned                chunkno;    /* chunk number for this mesg       */
    void                    *native;    /* native format message            */
    uint8_t                 *raw;       /* pointer to raw data              */
    size_t                  raw_size;   /* size with alignment              */
};
 
/* Struct for storing information about "best" message to move to new chunk */
typedef struct H5O_msg_alloc_info_t {
    int msgno;                      /* Index in message array */
    unsigned id;                    /* Message type ID on disk */
    unsigned chunkno;               /* Index in chunk array */
    size_t gap_size;                /* Size of any "gap" in the chunk immediately after message */
    size_t null_size;               /* Size of any null message in the chunk immediately after message */
    size_t total_size;              /* Total size of "available" space around message */
    unsigned null_msgno;            /* Message index of null message immediately after message */
} H5O_msg_alloc_info_t;
 
typedef struct H5O_chunk_t {
    haddr_t addr;           /*chunk file address             */
    size_t  size;           /*chunk size                 */
    size_t  gap;            /*space at end of chunk too small for null message */
    uint8_t *image;         /*image of file              */
    struct H5O_chunk_proxy_t *chunk_proxy;    /* Pointer to a chunk's proxy when chunk protected */
} H5O_chunk_t;
 
struct H5O_t {
    H5AC_info_t cache_info; /* Information for metadata cache functions, _must_ be */
                            /* first field in structure */
 
    /* File-specific information (not stored) */
    size_t      sizeof_size;            /* Size of file sizes            */
    size_t      sizeof_addr;            /* Size of file addresses        */
    hbool_t     swmr_write;             /* Whether we are doing SWMR writes  */
 
    /* Debugging information (not stored) */
#ifdef H5O_ENABLE_BAD_MESG_COUNT
    hbool_t     store_bad_mesg_count;   /* Flag to indicate that a bad message count should be stored */
                                        /* (This is to simulate a bug in earlier
                                         *      versions of the library)
                                         */
#endif /* H5O_ENABLE_BAD_MESG_COUNT */
#ifndef NDEBUG
    size_t      ndecode_dirtied;        /* Number of messages dirtied by decoding */
#endif /* NDEBUG */
 
    /* Chunk management information (not stored) */
    size_t      rc;                     /* Reference count of [continuation] chunks using this structure */
 
    /* Object information (stored) */
    hbool_t     has_refcount_msg;       /* Whether the object has a ref. count message */
    unsigned    nlink;          /*link count                 */
    uint8_t version;        /*version number             */
    uint8_t flags;          /*flags                  */
 
    /* Time information (stored, for versions > 1 & H5O_HDR_STORE_TIMES flag set) */
    time_t      atime;                  /*access time                */
    time_t      mtime;                  /*modification time              */
    time_t      ctime;                  /*change time                */
    time_t      btime;                  /*birth time                 */
 
    /* Attribute information (stored, for versions > 1) */
    unsigned    max_compact;        /* Maximum # of compact attributes   */
    unsigned    min_dense;      /* Minimum # of "dense" attributes   */
 
    /* Message management (stored, encoded in chunks) */
    size_t  nmesgs;         /*number of messages             */
    size_t  alloc_nmesgs;       /*number of message slots        */
    H5O_mesg_t  *mesg;          /*array of messages          */
    size_t      link_msgs_seen;         /* # of link messages seen when loading header */
    size_t      attr_msgs_seen;         /* # of attribute messages seen when loading header */
 
    /* Chunk management (not stored) */
    size_t  nchunks;        /*number of chunks           */
    size_t  alloc_nchunks;      /*chunks allocated           */
    H5O_chunk_t *chunk;         /*array of chunks            */
    hbool_t     chunks_pinned;          /* Whether chunks are pinned from ohdr protect */
 
    /* Object header proxy information (not stored) */
    H5AC_proxy_entry_t *proxy;          /* Proxy cache entry for all ohdr entries */
};
 
/* Class for types of objects in file */
typedef struct H5O_obj_class_t {
    H5O_type_t  type;               /*object type on disk        */
    const char  *name;              /*for debugging          */
    void       *(*get_copy_file_udata)(void);   /*retrieve user data for 'copy file' operation */
    void    (*free_copy_file_udata)(void *); /*free user data for 'copy file' operation */
    htri_t  (*isa)(const H5O_t *);      /*if a header matches an object class */
    void    *(*open)(const H5G_loc_t *, H5I_type_t *);  /*open an object of this class */
    void    *(*create)(H5F_t *, void *, H5G_loc_t *);   /*create an object of this class */
    H5O_loc_t   *(*get_oloc)(hid_t );       /*get the object header location for an object */
    herr_t      (*bh_info)(const H5O_loc_t *loc, H5O_t *oh, H5_ih_info_t *bh_info); /*get the index & heap info for an object */
    herr_t      (*flush)(void *obj_ptr);        /*flush an opened object of this class */
} H5O_obj_class_t;
 
/* Node in skip list to map addresses from one file to another during object header copy */
typedef struct H5O_addr_map_t {
    H5_obj_t    src_obj_pos;            /* Location of source object */
    haddr_t     dst_addr;               /* Address of object in destination file */
    hbool_t     is_locked;              /* Indicate that the destination object is locked currently */
    hsize_t     inc_ref_count;          /* Number of deferred increments to reference count */
    const H5O_obj_class_t *obj_class;   /* Object class */
    void        *udata;                 /* Object class copy file udata */
} H5O_addr_map_t;
 
/* Stack of continuation messages to interpret */
typedef struct H5O_cont_msgs_t {
    size_t      nmsgs;                  /* Number of continuation messages found so far */
    size_t  alloc_nmsgs;        /* Continuation messages allocated */
    H5O_cont_t *msgs;           /* Array of continuation messages */
} H5O_cont_msgs_t;
 
/* Common callback information for loading object header prefix from disk */
typedef struct H5O_common_cache_ud_t {
    H5F_t *f;                           /* Pointer to file for object header/chunk */
    unsigned file_intent;               /* Read/write intent for file */
    unsigned merged_null_msgs;          /* Number of null messages merged together */
    H5O_cont_msgs_t *cont_msg_info;     /* Pointer to continuation messages to work on */
    haddr_t addr;                       /* Address of the prefix or chunk */
} H5O_common_cache_ud_t;
 
/* Callback information for loading object header prefix from disk */
typedef struct H5O_cache_ud_t {
    hbool_t made_attempt;               /* Whether the deserialize routine was already attempted */
    unsigned v1_pfx_nmesgs;             /* Number of messages from v1 prefix header */
    size_t chunk0_size;                 /* Size of serialized first chunk    */
    H5O_t *oh;                          /* Partially deserialized object header, for later use */
    hbool_t free_oh;                    /* Whether to free the object header or not */
    H5O_common_cache_ud_t common;       /* Common object header cache callback info */
} H5O_cache_ud_t;
 
/* Structure representing each chunk in the cache */
typedef struct H5O_chunk_proxy_t {
    H5AC_info_t cache_info;    /* Information for metadata cache functions, _must_ be */
                                /* first field in structure */
 
    H5F_t *f;                           /* Pointer to file for object header/chunk */
    H5O_t       *oh;                    /* Object header for this chunk */
    unsigned    chunkno;                /* Chunk number for this chunk */
 
    /* Flush depencency parent information (not stored) 
     *
     * The following field is used to store a pointer 
     * to the in-core representation of a new chunk proxy's flush dependency
     * parent -- if it exists.  If it does not exist, this field will
     * contain NULL.
     *
     * If the file is opened in SWMR write mode, the flush dependency 
     * parent of the chunk proxy will be either its object header 
     * or the chunk with the continuation message that references this chunk.
     */
    void *fd_parent;                    /* Pointer to flush dependency parent */
} H5O_chunk_proxy_t;
 
/* Callback information for loading object header chunk from disk */
typedef struct H5O_chk_cache_ud_t {
    hbool_t decoding;                   /* Whether the object header is being decoded */
    H5O_t *oh;                          /* Object header for this chunk */
    unsigned chunkno;                   /* Index of chunk being brought in (for re-loads) */
    size_t size;                        /* Size of chunk in the file */
    H5O_common_cache_ud_t common;       /* Common object header cache callback info */
} H5O_chk_cache_ud_t;
 
/* Header message ID to class mapping */
H5_DLLVAR const H5O_msg_class_t *const H5O_msg_class_g[H5O_MSG_TYPES];
 
/* Declare external the free list for H5O_t's */
H5FL_EXTERN(H5O_t);
 
/* Declare external the free list for H5O_mesg_t sequences */
H5FL_SEQ_EXTERN(H5O_mesg_t);
 
/* Declare external the free list for H5O_chunk_t sequences */
H5FL_SEQ_EXTERN(H5O_chunk_t);
 
/* Declare external the free list for chunk_image blocks */
H5FL_BLK_EXTERN(chunk_image);
 
/*
 * Object header messages
 */
 
/* Null Message. (0x0000) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_NULL[1];
 
/* Simple Dataspace Message. (0x0001) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_SDSPACE[1];
 
/* Link Information Message. (0x0002) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_LINFO[1];
 
/* Datatype Message. (0x0003) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_DTYPE[1];
 
/* Old Fill Value Message. (0x0004) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_FILL[1];
 
/* New Fill Value Message. (0x0005) */
/*
 * The new fill value message is fill value plus
 * space allocation time and fill value writing time and whether fill
 * value is defined.
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_FILL_NEW[1];
 
/* Link Message. (0x0006) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_LINK[1];
 
/* External File List Message. (0x0007) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_EFL[1];
 
/* Data Layout Message. (0x0008) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_LAYOUT[1];
 
#ifdef H5O_ENABLE_BOGUS
/* "Bogus valid" Message. (0x0009) */
/* "Bogus invalid" Message. (0x0019) */
/*
 * Used for debugging - should never be found in valid HDF5 file.
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_BOGUS_VALID[1];
H5_DLLVAR const H5O_msg_class_t H5O_MSG_BOGUS_INVALID[1];
#endif /* H5O_ENABLE_BOGUS */
 
/* Group Information Message. (0x000a) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_GINFO[1];
 
/* Filter pipeline message. (0x000b) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_PLINE[1];
 
/* Attribute Message. (0x000c) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_ATTR[1];
 
/* Object name message. (0x000d) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_NAME[1];
 
/* Modification Time Message. (0x000e) */
/*
 * The message is just a `time_t'.
 * (See also the "new" modification time message)
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_MTIME[1];
 
/* Shared Message information message (0x000f)
 * A message for the superblock extension, holding information about
 * the file-wide shared message "SOHM" table
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_SHMESG[1];
 
/* Object Header Continuation Message. (0x0010) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_CONT[1];
 
/* Symbol Table Message. (0x0011) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_STAB[1];
 
/* New Modification Time Message. (0x0012) */
/*
 * The message is just a `time_t'.
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_MTIME_NEW[1];
 
/* v1 B-tree 'K' value message (0x0013)
 * A message for the superblock extension, holding information about
 * the file-wide v1 B-tree 'K' values.
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_BTREEK[1];
 
/* Driver info message (0x0014)
 * A message for the superblock extension, holding information about
 * the file driver settings
 */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_DRVINFO[1];
 
/* Attribute Information Message. (0x0015) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_AINFO[1];
 
/* Reference Count Message. (0x0016) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_REFCOUNT[1];
 
/* Free-space Manager Info message. (0x0017) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_FSINFO[1];
 
/* Metadata Cache Image message. (0x0018) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_MDCI[1];
 
/* Placeholder for unknown message. (0x0019) */
H5_DLLVAR const H5O_msg_class_t H5O_MSG_UNKNOWN[1];
 
 
/*
 * Object header "object" types
 */
 
/* Group Object. (H5O_TYPE_GROUP - 0) */
H5_DLLVAR const H5O_obj_class_t H5O_OBJ_GROUP[1];
 
/* Dataset Object. (H5O_TYPE_DATASET - 1) */
H5_DLLVAR const H5O_obj_class_t H5O_OBJ_DATASET[1];
 
/* Datatype Object. (H5O_TYPE_NAMED_DATATYPE - 2) */
H5_DLLVAR const H5O_obj_class_t H5O_OBJ_DATATYPE[1];
 
/* Package-local function prototypes */
H5_DLL const H5O_obj_class_t *H5O__obj_class(const H5O_loc_t *loc);
H5_DLL int H5O__link_oh(H5F_t *f, int adjust, H5O_t *oh, hbool_t *deleted);
H5_DLL herr_t H5O__visit(H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
    H5_iter_order_t order, H5O_iterate2_t op, void *op_data, unsigned fields);
H5_DLL herr_t H5O__inc_rc(H5O_t *oh);
H5_DLL herr_t H5O__dec_rc(H5O_t *oh);
H5_DLL herr_t H5O__free(H5O_t *oh);
 
/* Object header message routines */
H5_DLL herr_t H5O__msg_alloc(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
    unsigned *mesg_flags, void *mesg, size_t *mesg_idx);
H5_DLL herr_t H5O__msg_append_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
    unsigned mesg_flags, unsigned update_flags, void *mesg);
H5_DLL herr_t H5O__msg_write_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
    unsigned mesg_flags, unsigned update_flags, void *mesg);
H5_DLL herr_t H5O__msg_free_mesg(H5O_mesg_t *mesg);
H5_DLL unsigned H5O__msg_count_real(const H5O_t *oh, const H5O_msg_class_t *type);
H5_DLL herr_t H5O__msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
    int sequence, H5O_operator_t op, void *op_data, hbool_t adj_link);
H5_DLL void *H5O__msg_copy_file(const H5O_msg_class_t *type, H5F_t *file_src,
    void *mesg_src, H5F_t *file_dst, hbool_t *recompute_size,
    unsigned *mesg_flags, H5O_copy_t *cpy_info, void *udata);
H5_DLL herr_t H5O__msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
    const H5O_mesg_operator_t *op, void *op_data);
H5_DLL herr_t H5O__flush_msgs(H5F_t *f, H5O_t *oh);
H5_DLL herr_t H5O__delete_mesg(H5F_t *f, H5O_t *open_oh, H5O_mesg_t *mesg);
 
/* Object header chunk routines */
H5_DLL herr_t H5O__chunk_add(H5F_t *f, H5O_t *oh, unsigned idx, unsigned cont_chunkno);
H5_DLL H5O_chunk_proxy_t *H5O__chunk_protect(H5F_t *f, H5O_t *oh, unsigned idx);
H5_DLL herr_t H5O__chunk_unprotect(H5F_t *f, H5O_chunk_proxy_t *chk_proxy, hbool_t chk_dirtied);
H5_DLL herr_t H5O__chunk_update_idx(H5F_t *f, H5O_t *oh, unsigned idx);
H5_DLL herr_t H5O__chunk_resize(H5O_t *oh, H5O_chunk_proxy_t *chk_proxy);
H5_DLL herr_t H5O__chunk_delete(H5F_t *f, H5O_t *oh, unsigned idx);
H5_DLL herr_t H5O__chunk_dest(H5O_chunk_proxy_t *chunk_proxy);
 
/* Collect storage info for btree and heap */
H5_DLL herr_t H5O__attr_bh_info(H5F_t *f, H5O_t *oh, H5_ih_info_t *bh_info);
 
/* Object header allocation routines */
H5_DLL herr_t H5O__alloc_msgs(H5O_t *oh, size_t min_alloc);
H5_DLL herr_t H5O__alloc_chunk(H5F_t *f, H5O_t *oh, size_t size,
    size_t found_null, const H5O_msg_alloc_info_t *found_msg, size_t *new_idx);
H5_DLL herr_t  H5O__alloc(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
    const void *mesg, size_t *mesg_idx);
H5_DLL herr_t H5O__condense_header(H5F_t *f, H5O_t *oh);
H5_DLL herr_t H5O__release_mesg(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg,
    hbool_t adj_link);
 
/* Shared object operators */
H5_DLL void * H5O__shared_decode(H5F_t *f, H5O_t *open_oh, unsigned *ioflags,
    const uint8_t *buf, const H5O_msg_class_t *type);
H5_DLL herr_t H5O__shared_encode(const H5F_t *f, uint8_t *buf/*out*/, const H5O_shared_t *sh_mesg);
H5_DLL size_t H5O__shared_size(const H5F_t *f, const H5O_shared_t *sh_mesg);
H5_DLL herr_t H5O__shared_delete(H5F_t *f, H5O_t *open_oh,
    const H5O_msg_class_t *mesg_type, H5O_shared_t *sh_mesg);
H5_DLL herr_t H5O__shared_link(H5F_t *f, H5O_t *open_oh,
    const H5O_msg_class_t *mesg_type, H5O_shared_t *sh_mesg);
H5_DLL herr_t H5O__shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
    const H5O_msg_class_t *mesg_type, const void *_native_src, void *_native_dst,
    hbool_t *recompute_size, unsigned *mesg_flags, H5O_copy_t *cpy_info,
    void *udata);
H5_DLL herr_t H5O__shared_post_copy_file (H5F_t *f,
    const H5O_msg_class_t *mesg_type, const H5O_shared_t *shared_src,
    H5O_shared_t *shared_dst, unsigned *mesg_flags, H5O_copy_t *cpy_info);
H5_DLL herr_t H5O__shared_debug(const H5O_shared_t *mesg, FILE *stream,
    int indent, int fwidth);
 
/* Attribute message operators */
H5_DLL herr_t H5O__attr_reset(void *_mesg);
H5_DLL herr_t H5O__attr_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
H5_DLL herr_t H5O__attr_link(H5F_t *f, H5O_t *open_oh, void *_mesg);
H5_DLL herr_t H5O__attr_count_real(H5F_t *f, H5O_t *oh, hsize_t *nattrs);
 
/* Arrays of versions for:
 * Object header, Attribute/Fill value/Filter pipeline messages
 */
/* Layout/Datatype/Dataspace arrays of versions are in H5Dpkg.h, H5Tpkg.h and H5Spkg.h */
H5_DLLVAR const unsigned H5O_obj_ver_bounds[H5F_LIBVER_NBOUNDS];
H5_DLLVAR const unsigned H5O_attr_ver_bounds[H5F_LIBVER_NBOUNDS];
H5_DLLVAR const unsigned H5O_fill_ver_bounds[H5F_LIBVER_NBOUNDS];
H5_DLLVAR const unsigned H5O_pline_ver_bounds[H5F_LIBVER_NBOUNDS];
 
/* Testing functions */
#ifdef H5O_TESTING
H5_DLL htri_t H5O__is_attr_empty_test(hid_t oid);
H5_DLL htri_t H5O__is_attr_dense_test(hid_t oid);
H5_DLL herr_t H5O__num_attrs_test(hid_t oid, hsize_t *nattrs);
H5_DLL herr_t H5O__attr_dense_info_test(hid_t oid, hsize_t *name_count, hsize_t *corder_count);
H5_DLL herr_t H5O__check_msg_marked_test(hid_t oid, hbool_t flag_val);
H5_DLL herr_t H5O__expunge_chunks_test(const H5O_loc_t *oloc);
H5_DLL herr_t H5O__get_rc_test(const H5O_loc_t *oloc, unsigned *rc);
H5_DLL herr_t H5O__msg_get_chunkno_test(hid_t oid, unsigned msg_type, unsigned *chunk_num);
H5_DLL herr_t H5O__msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type);
#endif /* H5O_TESTING */
 
/* Object header debugging routines */
#ifdef H5O_DEBUG
H5_DLL herr_t H5O__assert(const H5O_t *oh);
#endif /* H5O_DEBUG */
H5_DLL herr_t H5O__debug_real(H5F_t *f, H5O_t *oh, haddr_t addr, FILE *stream, int indent, int fwidth);
 
#endif /* _H5Opkg_H */