415 lines
19 KiB
C
415 lines
19 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* All rights reserved. *
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* *
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* This file is part of HDF5. The full HDF5 copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://www.hdfgroup.org/licenses. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*
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* This file contains public declarations for the H5FD (file drivers) developer
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* support routines.
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*/
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#ifndef H5FDdevelop_H
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#define H5FDdevelop_H
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/* Include package's public header */
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#include "H5FDpublic.h"
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/*****************/
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/* Public Macros */
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/*****************/
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/**
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* Version of the file driver struct, H5FD_class_t
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*/
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#define H5FD_CLASS_VERSION 0x01 /* File driver struct version */
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/* Map "fractal heap" header blocks to 'ohdr' type file memory, since its
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* a fair amount of work to add a new kind of file memory and they are similar
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* enough to object headers and probably too minor to deserve their own type.
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*
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* Map "fractal heap" indirect blocks to 'ohdr' type file memory, since they
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* are similar to fractal heap header blocks.
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*
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* Map "fractal heap" direct blocks to 'lheap' type file memory, since they
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* will be replacing local heaps.
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*
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* Map "fractal heap" 'huge' objects to 'draw' type file memory, since they
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* represent large objects that are directly stored in the file.
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*
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* -QAK
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*/
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/**
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* Fractal heap header block; it is mapped to 'ohdr' type file memory to
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* benefit from their similarity.
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*/
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#define H5FD_MEM_FHEAP_HDR H5FD_MEM_OHDR
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/**
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* Fractal heap indirect block; it is mapped to 'ohdr' type file memory
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* because the indirect blocks are similar to fractal heap header blocks.
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*/
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#define H5FD_MEM_FHEAP_IBLOCK H5FD_MEM_OHDR
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/**
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* Fractal heap direct block; it is mapped to 'lheap' type file memory,
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* because the fractal heap direct blocks will be replacing local heaps.
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*/
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#define H5FD_MEM_FHEAP_DBLOCK H5FD_MEM_LHEAP
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/**
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* Fractal heap 'huge' object; it is mapped to 'draw' type file memory because
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* the fractal heap 'huge' objects represent large objects that are directly
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* stored in the file.
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*/
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#define H5FD_MEM_FHEAP_HUGE_OBJ H5FD_MEM_DRAW
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/**
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* Free space header blocks; it is mapped to 'ohdr' type file memory to
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* benefit from their similarity.
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*/
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#define H5FD_MEM_FSPACE_HDR H5FD_MEM_OHDR
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/**
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* Free space serialized section; it is mapped to 'lheap' type file memory
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* because it is similar enough to local heap info.
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*/
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#define H5FD_MEM_FSPACE_SINFO H5FD_MEM_LHEAP
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/**
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* Shared object header message master table; it is mapped to 'ohdr' type file
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* memory to benefit from their similarity.
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*/
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#define H5FD_MEM_SOHM_TABLE H5FD_MEM_OHDR
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/**
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* Shared object header message index; it is mapped to 'btree' type file memory
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* because the indices are similar enough to B-tree nodes.
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*/
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#define H5FD_MEM_SOHM_INDEX H5FD_MEM_BTREE
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/**
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* Extensible array header block; it is mapped to 'ohdr' type file memory to
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* benefit from their similarity.
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*/
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#define H5FD_MEM_EARRAY_HDR H5FD_MEM_OHDR
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/**
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* Extensible array index block; it is mapped to 'ohdr' type file memory because
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* these index blocks are similar to extensible array header blocks.
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*/
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#define H5FD_MEM_EARRAY_IBLOCK H5FD_MEM_OHDR
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/**
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* Extensible array super block; it is mappend to 'btree' type file memory
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* because the indices are similar enough to B-tree nodes.
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*/
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#define H5FD_MEM_EARRAY_SBLOCK H5FD_MEM_BTREE
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/**
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* Extensible array data block; it is mapped to 'lheap' type file memory
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* because it is similar enough to local heap info.
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*/
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#define H5FD_MEM_EARRAY_DBLOCK H5FD_MEM_LHEAP
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/**
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* Extensible array data block & page; it is mapped to 'lheap' type file memory
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* because it is similar enough to local heap info.
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*/
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#define H5FD_MEM_EARRAY_DBLK_PAGE H5FD_MEM_LHEAP
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/**
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* Fixed array header block; it is mapped to 'ohdr' type file memory to
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* benefit their similarity.
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*/
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#define H5FD_MEM_FARRAY_HDR H5FD_MEM_OHDR
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/**
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* Fixed array data block; it is mapped to 'lheap' type file memory
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* because it is similar enough to local heap info.
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*/
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#define H5FD_MEM_FARRAY_DBLOCK H5FD_MEM_LHEAP
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/**
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* Fixed array data block & page; it is mapped to 'lheap' type file memory
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* because it is similar enough to local heap info.
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*/
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#define H5FD_MEM_FARRAY_DBLK_PAGE H5FD_MEM_LHEAP
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/**
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* A free-list map which maps all types of allocation requests to a single
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* free list. This is useful for drivers that don't really care about
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* keeping different requests segregated in the underlying file and which
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* want to make most efficient reuse of freed memory. The use of the
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* H5FD_MEM_SUPER free list is arbitrary.
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*/
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#define H5FD_FLMAP_SINGLE \
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{ \
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H5FD_MEM_SUPER, /*default*/ \
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H5FD_MEM_SUPER, /*super*/ \
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H5FD_MEM_SUPER, /*btree*/ \
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H5FD_MEM_SUPER, /*draw*/ \
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H5FD_MEM_SUPER, /*gheap*/ \
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H5FD_MEM_SUPER, /*lheap*/ \
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H5FD_MEM_SUPER /*ohdr*/ \
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}
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/**
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* A free-list map which segregates requests into `raw' or `meta' data
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* pools.
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*/
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#define H5FD_FLMAP_DICHOTOMY \
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{ \
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H5FD_MEM_SUPER, /*default*/ \
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H5FD_MEM_SUPER, /*super*/ \
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H5FD_MEM_SUPER, /*btree*/ \
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H5FD_MEM_DRAW, /*draw*/ \
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H5FD_MEM_DRAW, /*gheap*/ \
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H5FD_MEM_SUPER, /*lheap*/ \
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H5FD_MEM_SUPER /*ohdr*/ \
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}
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/**
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* The default free list map which causes each request type to use it's own
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* free-list.
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*/
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#define H5FD_FLMAP_DEFAULT \
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{ \
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H5FD_MEM_DEFAULT, /*default*/ \
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H5FD_MEM_DEFAULT, /*super*/ \
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H5FD_MEM_DEFAULT, /*btree*/ \
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H5FD_MEM_DEFAULT, /*draw*/ \
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H5FD_MEM_DEFAULT, /*gheap*/ \
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H5FD_MEM_DEFAULT, /*lheap*/ \
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H5FD_MEM_DEFAULT /*ohdr*/ \
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}
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/*******************/
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/* Public Typedefs */
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/*******************/
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/* Forward declaration */
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typedef struct H5FD_t H5FD_t;
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/**
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* Class information for each file driver
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*/
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typedef struct H5FD_class_t {
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unsigned version;
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/**< File driver class struct version number */
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H5FD_class_value_t value;
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/**< File driver identifier */
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const char *name;
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/**< File driver name, must be unique */
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haddr_t maxaddr;
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/**< Maximum address for file */
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H5F_close_degree_t fc_degree;
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/**< File close behavior degree */
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herr_t (*terminate)(void);
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/**< Shutdowns this driver */
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hsize_t (*sb_size)(H5FD_t *file);
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/**< Gets the size of the private information to be stored in the superblock */
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herr_t (*sb_encode)(H5FD_t *file, char *name /*out*/, unsigned char *p /*out*/);
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/**< Encodes driver information from the superblock */
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herr_t (*sb_decode)(H5FD_t *f, const char *name, const unsigned char *p);
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/**< Decodes the superblock information for this driver */
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size_t fapl_size; /**< Size of driver-specific file access properties */
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void *(*fapl_get)(H5FD_t *file);
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/**< Returns the file access property list */
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void *(*fapl_copy)(const void *fapl);
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/**< Copies the file access property list */
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herr_t (*fapl_free)(void *fapl);
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/**< Frees the driver-specific file access property list */
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size_t dxpl_size;
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/**< Size of the transfer property list */
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void *(*dxpl_copy)(const void *dxpl);
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/**< Copies the transfer property list */
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herr_t (*dxpl_free)(void *dxpl);
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/**< Frees the transfer property list */
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H5FD_t *(*open)(const char *name, unsigned flags, hid_t fapl, haddr_t maxaddr);
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/**< Create or open an HDF5 file of this driver */
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herr_t (*close)(H5FD_t *file);
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/**< Close an HDF5 file of this driver */
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int (*cmp)(const H5FD_t *f1, const H5FD_t *f2);
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/**< Compares two files belonging to this driver */
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herr_t (*query)(const H5FD_t *f1, unsigned long *flags);
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/**< Sets the flags that this driver is capable of supporting */
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herr_t (*get_type_map)(const H5FD_t *file, H5FD_mem_t *type_map);
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/**< Retrieves the memory type mapping for this file */
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haddr_t (*alloc)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
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/**< Allocates file memory */
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herr_t (*free)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size);
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/**< Frees the resources for this driver */
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haddr_t (*get_eoa)(const H5FD_t *file, H5FD_mem_t type);
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/**< Gets the address of first byte past the addressed space */
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herr_t (*set_eoa)(H5FD_t *file, H5FD_mem_t type, haddr_t addr);
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/**< Sets the end-of-address marker for the file */
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haddr_t (*get_eof)(const H5FD_t *file, H5FD_mem_t type);
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/**< Gets the address of first byte past the file-end */
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herr_t (*get_handle)(H5FD_t *file, hid_t fapl, void **file_handle);
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/**< Returns the file handle of this file driver */
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herr_t (*read)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl, haddr_t addr, size_t size, void *buffer);
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/**< Reads the specified number of bytes of data from the file beginning at the specified
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* address into the provided buffer, according to the specified data transfer properties */
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herr_t (*write)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl, haddr_t addr, size_t size, const void *buffer);
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/**< Writes the specified number of bytes of data to the file beginning at the specified
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* address from the provided buffer, according to the specified data transfer properties */
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herr_t (*read_vector)(H5FD_t *file, hid_t dxpl, uint32_t count, H5FD_mem_t types[], haddr_t addrs[],
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size_t sizes[], void *bufs[]);
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/**< Reads the specified length of data from the file into the provided array */
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herr_t (*write_vector)(H5FD_t *file, hid_t dxpl, uint32_t count, H5FD_mem_t types[], haddr_t addrs[],
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size_t sizes[], const void *bufs[]);
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/**< Writes the specified length of data in the provided array to the file at the specified offsets */
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herr_t (*read_selection)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, size_t count, hid_t mem_spaces[],
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hid_t file_spaces[], haddr_t offsets[], size_t element_sizes[],
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void *bufs[] /*out*/);
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/**< */
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herr_t (*write_selection)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, size_t count, hid_t mem_spaces[],
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hid_t file_spaces[], haddr_t offsets[], size_t element_sizes[],
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const void *bufs[] /*in*/);
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/**< */
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herr_t (*flush)(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
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/**< Flushes all data to disk */
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herr_t (*truncate)(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
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/**< Truncates a file */
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herr_t (*lock)(H5FD_t *file, hbool_t rw);
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/**< Places an advisory lock on a file */
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herr_t (*unlock)(H5FD_t *file);
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/**< Removes the existing lock on a file */
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herr_t (*del)(const char *name, hid_t fapl);
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/**< Deletes a file */
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herr_t (*ctl)(H5FD_t *file, uint64_t op_code, uint64_t flags, const void *input, void **output);
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/**< Performs a CTL operation */
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H5FD_mem_t fl_map[H5FD_MEM_NTYPES];
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/**< Free-list map */
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} H5FD_class_t;
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/**
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* A free list is a singly-linked list of address/size pairs.
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*/
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typedef struct H5FD_free_t {
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haddr_t addr;
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hsize_t size;
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struct H5FD_free_t *next;
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} H5FD_free_t;
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/**
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* The main datatype for each driver. Public fields common to all drivers
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* are declared here and the driver appends private fields in memory.
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*/
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struct H5FD_t {
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hid_t driver_id; /**< Driver ID for this file */
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const H5FD_class_t *cls; /**< Constant class info */
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unsigned long fileno; /**< File 'serial' number */
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unsigned access_flags; /**< File access flags (from create or open) */
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unsigned long feature_flags; /**< VFL Driver feature Flags */
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haddr_t maxaddr; /**< For this file, overrides class */
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haddr_t base_addr; /**< Base address for HDF5 data w/in file */
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/* Space allocation management fields */
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hsize_t threshold; /**< Threshold for alignment */
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hsize_t alignment; /**< Allocation alignment */
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hbool_t paged_aggr; /**< Paged aggregation for file space is enabled or not */
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};
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/* VFD initialization function */
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typedef hid_t (*H5FD_init_t)(void);
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/********************/
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/* Public Variables */
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/********************/
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/*********************/
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/* Public Prototypes */
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/*********************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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H5_DLL hid_t H5FDperform_init(H5FD_init_t op);
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H5_DLL hid_t H5FDregister(const H5FD_class_t *cls);
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H5_DLL htri_t H5FDis_driver_registered_by_name(const char *driver_name);
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H5_DLL htri_t H5FDis_driver_registered_by_value(H5FD_class_value_t driver_value);
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H5_DLL herr_t H5FDunregister(hid_t driver_id);
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H5_DLL H5FD_t *H5FDopen(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr);
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H5_DLL herr_t H5FDclose(H5FD_t *file);
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H5_DLL int H5FDcmp(const H5FD_t *f1, const H5FD_t *f2);
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H5_DLL int H5FDquery(const H5FD_t *f, unsigned long *flags);
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H5_DLL haddr_t H5FDalloc(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
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H5_DLL herr_t H5FDfree(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size);
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H5_DLL haddr_t H5FDget_eoa(H5FD_t *file, H5FD_mem_t type);
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H5_DLL herr_t H5FDset_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t eoa);
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H5_DLL haddr_t H5FDget_eof(H5FD_t *file, H5FD_mem_t type);
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H5_DLL herr_t H5FDget_vfd_handle(H5FD_t *file, hid_t fapl, void **file_handle);
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H5_DLL herr_t H5FDread(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
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void *buf /*out*/);
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H5_DLL herr_t H5FDwrite(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
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const void *buf);
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H5_DLL herr_t H5FDread_vector(H5FD_t *file, hid_t dxpl_id, uint32_t count, H5FD_mem_t types[],
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haddr_t addrs[], size_t sizes[], void *bufs[] /* out */);
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H5_DLL herr_t H5FDwrite_vector(H5FD_t *file, hid_t dxpl_id, uint32_t count, H5FD_mem_t types[],
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haddr_t addrs[], size_t sizes[], const void *bufs[] /* in */);
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H5_DLL herr_t H5FDread_selection(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, uint32_t count,
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hid_t mem_spaces[], hid_t file_spaces[], haddr_t offsets[],
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size_t element_sizes[], void *bufs[] /* out */);
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H5_DLL herr_t H5FDwrite_selection(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, uint32_t count,
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hid_t mem_spaces[], hid_t file_spaces[], haddr_t offsets[],
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size_t element_sizes[], const void *bufs[]);
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H5_DLL herr_t H5FDread_vector_from_selection(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, uint32_t count,
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hid_t mem_spaces[], hid_t file_spaces[], haddr_t offsets[],
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size_t element_sizes[], void *bufs[] /* out */);
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H5_DLL herr_t H5FDwrite_vector_from_selection(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, uint32_t count,
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hid_t mem_spaces[], hid_t file_spaces[], haddr_t offsets[],
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size_t element_sizes[], const void *bufs[] /* in */);
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H5_DLL herr_t H5FDread_from_selection(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, uint32_t count,
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hid_t mem_space_ids[], hid_t file_space_ids[], haddr_t offsets[],
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size_t element_sizes[], void *bufs[] /* out */);
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H5_DLL herr_t H5FDwrite_from_selection(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, uint32_t count,
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hid_t mem_space_ids[], hid_t file_space_ids[], haddr_t offsets[],
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size_t element_sizes[], const void *bufs[] /* in */);
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H5_DLL herr_t H5FDflush(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
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H5_DLL herr_t H5FDtruncate(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
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H5_DLL herr_t H5FDlock(H5FD_t *file, hbool_t rw);
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H5_DLL herr_t H5FDunlock(H5FD_t *file);
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H5_DLL herr_t H5FDdelete(const char *name, hid_t fapl_id);
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H5_DLL herr_t H5FDctl(H5FD_t *file, uint64_t op_code, uint64_t flags, const void *input, void **output);
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#ifdef __cplusplus
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}
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#endif
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#endif /* H5FDdevelop_H */
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