hdf5_ep

/* Load native information for a message, if it's not already present */

/* (Only works for messages with decode callback) */

#define H5O_LOAD_NATIVE(F, DXPL, 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);                                           \

            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)                                          \

        }                                                                     \

                                                                              \

#define H5O_SHARE_IN_OHDR       0x02

​

​

/* 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 */

    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 *, hid_t, H5O_t *, void *);    /* Delete space in file referenced by this message */

    herr_t  (*link)(H5F_t *, hid_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 */