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zolliker
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libs/cygwin/include/H5FDpublic.h Executable file
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Monday, July 26, 1999
*/
#ifndef _H5FDpublic_H
#define _H5FDpublic_H
#include "H5public.h"
#include "H5Fpublic.h" /*for H5F_close_degree_t */
#define H5_HAVE_VFL 1 /*define a convenient app feature test*/
#define H5FD_VFD_DEFAULT 0 /* Default VFL driver value */
/*
* Types of allocation requests. The values larger than H5FD_MEM_DEFAULT
* should not change other than adding new types to the end. These numbers
* might appear in files.
*/
typedef enum H5FD_mem_t {
H5FD_MEM_NOLIST = -1, /*must be negative*/
H5FD_MEM_DEFAULT = 0, /*must be zero*/
H5FD_MEM_SUPER = 1,
H5FD_MEM_BTREE = 2,
H5FD_MEM_DRAW = 3,
H5FD_MEM_GHEAP = 4,
H5FD_MEM_LHEAP = 5,
H5FD_MEM_OHDR = 6,
H5FD_MEM_NTYPES /*must be last*/
} H5FD_mem_t;
/*
* A free-list map which maps all types of allocation requests to a single
* free list. This is useful for drivers that don't really care about
* keeping different requests segregated in the underlying file and which
* want to make most efficient reuse of freed memory. The use of the
* H5FD_MEM_SUPER free list is arbitrary.
*/
#define H5FD_FLMAP_SINGLE { \
H5FD_MEM_SUPER, /*default*/ \
H5FD_MEM_SUPER, /*super*/ \
H5FD_MEM_SUPER, /*btree*/ \
H5FD_MEM_SUPER, /*draw*/ \
H5FD_MEM_SUPER, /*gheap*/ \
H5FD_MEM_SUPER, /*lheap*/ \
H5FD_MEM_SUPER /*ohdr*/ \
}
/*
* A free-list map which segregates requests into `raw' or `meta' data
* pools.
*/
#define H5FD_FLMAP_DICHOTOMY { \
H5FD_MEM_SUPER, /*default*/ \
H5FD_MEM_SUPER, /*super*/ \
H5FD_MEM_SUPER, /*btree*/ \
H5FD_MEM_DRAW, /*draw*/ \
H5FD_MEM_SUPER, /*gheap*/ \
H5FD_MEM_SUPER, /*lheap*/ \
H5FD_MEM_SUPER /*ohdr*/ \
}
/*
* The default free list map which causes each request type to use it's own
* free-list.
*/
#define H5FD_FLMAP_DEFAULT { \
H5FD_MEM_DEFAULT, /*default*/ \
H5FD_MEM_DEFAULT, /*super*/ \
H5FD_MEM_DEFAULT, /*btree*/ \
H5FD_MEM_DEFAULT, /*draw*/ \
H5FD_MEM_DEFAULT, /*gheap*/ \
H5FD_MEM_DEFAULT, /*lheap*/ \
H5FD_MEM_DEFAULT /*ohdr*/ \
}
/* Define VFL driver features that can be enabled on a per-driver basis */
/* These are returned with the 'query' function pointer in H5FD_class_t */
/*
* Defining the H5FD_FEAT_AGGREGATE_METADATA for a VFL driver means that
* the library will attempt to allocate a larger block for metadata and
* then sub-allocate each metadata request from that larger block.
*/
#define H5FD_FEAT_AGGREGATE_METADATA 0x00000001
/*
* Defining the H5FD_FEAT_ACCUMULATE_METADATA for a VFL driver means that
* the library will attempt to cache metadata as it is written to the file
* and build up a larger block of metadata to eventually pass to the VFL
* 'write' routine.
*
* Distinguish between updating the metadata accumulator on writes and
* reads. This is particularly (perhaps only, even) important for MPI-I/O
* where we guarantee that writes are collective, but reads may not be.
* If we were to allow the metadata accumulator to be written during a
* read operation, the application would hang.
*/
#define H5FD_FEAT_ACCUMULATE_METADATA_WRITE 0x00000002
#define H5FD_FEAT_ACCUMULATE_METADATA_READ 0x00000004
#define H5FD_FEAT_ACCUMULATE_METADATA (H5FD_FEAT_ACCUMULATE_METADATA_WRITE|H5FD_FEAT_ACCUMULATE_METADATA_READ)
/*
* Defining the H5FD_FEAT_DATA_SIEVE for a VFL driver means that
* the library will attempt to cache raw data as it is read from/written to
* a file in a "data seive" buffer. See Rajeev Thakur's papers:
* http://www.mcs.anl.gov/~thakur/papers/romio-coll.ps.gz
* http://www.mcs.anl.gov/~thakur/papers/mpio-high-perf.ps.gz
*/
#define H5FD_FEAT_DATA_SIEVE 0x00000008
/*
* Defining the H5FD_FEAT_AGGREGATE_SMALLDATA for a VFL driver means that
* the library will attempt to allocate a larger block for "small" raw data
* and then sub-allocate "small" raw data requests from that larger block.
*/
#define H5FD_FEAT_AGGREGATE_SMALLDATA 0x00000010
/* Forward declaration */
typedef struct H5FD_t H5FD_t;
/* Class information for each file driver */
typedef struct H5FD_class_t {
const char *name;
haddr_t maxaddr;
H5F_close_degree_t fc_degree;
hsize_t (*sb_size)(H5FD_t *file);
herr_t (*sb_encode)(H5FD_t *file, char *name/*out*/,
unsigned char *p/*out*/);
herr_t (*sb_decode)(H5FD_t *f, const char *name, const unsigned char *p);
size_t fapl_size;
void * (*fapl_get)(H5FD_t *file);
void * (*fapl_copy)(const void *fapl);
herr_t (*fapl_free)(void *fapl);
size_t dxpl_size;
void * (*dxpl_copy)(const void *dxpl);
herr_t (*dxpl_free)(void *dxpl);
H5FD_t *(*open)(const char *name, unsigned flags, hid_t fapl,
haddr_t maxaddr);
herr_t (*close)(H5FD_t *file);
int (*cmp)(const H5FD_t *f1, const H5FD_t *f2);
herr_t (*query)(const H5FD_t *f1, unsigned long *flags);
haddr_t (*alloc)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
herr_t (*free)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
haddr_t addr, hsize_t size);
haddr_t (*get_eoa)(H5FD_t *file);
herr_t (*set_eoa)(H5FD_t *file, haddr_t addr);
haddr_t (*get_eof)(H5FD_t *file);
herr_t (*get_handle)(H5FD_t *file, hid_t fapl, void**file_handle);
herr_t (*read)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl,
haddr_t addr, size_t size, void *buffer);
herr_t (*write)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl,
haddr_t addr, size_t size, const void *buffer);
herr_t (*flush)(H5FD_t *file, hid_t dxpl_id, unsigned closing);
herr_t (*lock)(H5FD_t *file, unsigned char *oid, unsigned lock_type, hbool_t last);
herr_t (*unlock)(H5FD_t *file, unsigned char *oid, hbool_t last);
H5FD_mem_t fl_map[H5FD_MEM_NTYPES];
} H5FD_class_t;
/* A free list is a singly-linked list of address/size pairs. */
typedef struct H5FD_free_t {
haddr_t addr;
hsize_t size;
struct H5FD_free_t *next;
} H5FD_free_t;
/*
* The main datatype for each driver. Public fields common to all drivers
* are declared here and the driver appends private fields in memory.
*/
struct H5FD_t {
hid_t driver_id; /*driver ID for this file */
const H5FD_class_t *cls; /*constant class info */
unsigned long fileno[2]; /* File serial number */
unsigned long feature_flags; /* VFL Driver feature Flags */
hsize_t threshold; /* Threshold for alignment */
hsize_t alignment; /* Allocation alignment */
hsize_t reserved_alloc; /* Space reserved for later alloc calls */
/* Metadata aggregation fields */
hsize_t def_meta_block_size; /* Metadata allocation
* block size (if
* aggregating metadata) */
hsize_t cur_meta_block_size; /* Current size of metadata
* allocation region left */
haddr_t eoma; /* End of metadata
* allocated region */
/* "Small data" aggregation fields */
hsize_t def_sdata_block_size; /* "Small data"
* allocation block size
* (if aggregating "small
* data") */
hsize_t cur_sdata_block_size; /* Current size of "small
* data" allocation
* region left */
haddr_t eosda; /* End of "small data"
* allocated region */
/* Metadata accumulator fields */
unsigned char *meta_accum; /* Buffer to hold the accumulated metadata */
haddr_t accum_loc; /* File location (offset) of the
* accumulated metadata */
size_t accum_size; /* Size of the accumulated
* metadata buffer used (in
* bytes) */
size_t accum_buf_size; /* Size of the accumulated
* metadata buffer allocated (in
* bytes) */
unsigned accum_dirty; /* Flag to indicate that the
* accumulated metadata is dirty */
haddr_t maxaddr; /* For this file, overrides class */
H5FD_free_t *fl[H5FD_MEM_NTYPES]; /* Freelist per allocation type */
hsize_t maxsize; /* Largest object on FL, or zero */
};
#ifdef __cplusplus
extern "C" {
#endif
/* Function prototypes */
H5_DLL hid_t H5FDregister(const H5FD_class_t *cls);
H5_DLL herr_t H5FDunregister(hid_t driver_id);
H5_DLL H5FD_t *H5FDopen(const char *name, unsigned flags, hid_t fapl_id,
haddr_t maxaddr);
H5_DLL herr_t H5FDclose(H5FD_t *file);
H5_DLL int H5FDcmp(const H5FD_t *f1, const H5FD_t *f2);
H5_DLL int H5FDquery(const H5FD_t *f, unsigned long *flags);
H5_DLL haddr_t H5FDalloc(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
H5_DLL herr_t H5FDfree(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
haddr_t addr, hsize_t size);
H5_DLL haddr_t H5FDrealloc(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
haddr_t addr, hsize_t old_size, hsize_t new_size);
H5_DLL haddr_t H5FDget_eoa(H5FD_t *file);
H5_DLL herr_t H5FDset_eoa(H5FD_t *file, haddr_t eof);
H5_DLL haddr_t H5FDget_eof(H5FD_t *file);
H5_DLL herr_t H5FDget_vfd_handle(H5FD_t *file, hid_t fapl, void**file_handle);
H5_DLL herr_t H5FDread(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
haddr_t addr, size_t size, void *buf/*out*/);
H5_DLL herr_t H5FDwrite(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
haddr_t addr, size_t size, const void *buf);
H5_DLL herr_t H5FDflush(H5FD_t *file, hid_t dxpl_id, unsigned closing);
#ifdef __cplusplus
}
#endif
#endif