/* * Copyright © 1999 NCSA * All rights reserved. * * Programmer: Robb Matzke * Monday, July 26, 1999 */ #ifndef _H5FDpublic_H #define _H5FDpublic_H #include #define H5_HAVE_VFL 1 /*define a convenient app feature test*/ /* * 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 queried 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. */ #define H5FD_FEAT_ACCUMULATE_METADATA 0x00000002 /* 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; 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, hsize_t size); herr_t (*free)(H5FD_t *file, H5FD_mem_t type, 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 (*read)(H5FD_t *file, hid_t dxpl, haddr_t addr, hsize_t size, void *buffer); herr_t (*write)(H5FD_t *file, H5FD_mem_t type, hid_t dxpl, haddr_t addr, hsize_t size, const void *buffer); herr_t (*flush)(H5FD_t *file); 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 feature_flags; /* VFL Driver feature Flags */ /* 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 */ /* Metadata accumulator fields */ unsigned char *meta_accum; /* Buffer to hold the accumulated metadata */ haddr_t accum_loc; /* File location (offset) of the accumulated metadata */ hsize_t accum_size; /* Size of the accumulated metadata buffer used (in bytes) */ hsize_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 */ __DLL__ hid_t H5FDregister(const H5FD_class_t *cls); __DLL__ herr_t H5FDunregister(hid_t driver_id); __DLL__ H5FD_t *H5FDopen(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr); __DLL__ herr_t H5FDclose(H5FD_t *file); __DLL__ int H5FDcmp(const H5FD_t *f1, const H5FD_t *f2); __DLL__ haddr_t H5FDalloc(H5FD_t *file, H5FD_mem_t type, hsize_t size); __DLL__ herr_t H5FDfree(H5FD_t *file, H5FD_mem_t type, haddr_t addr, hsize_t size); __DLL__ haddr_t H5FDrealloc(H5FD_t *file, H5FD_mem_t type, haddr_t addr, hsize_t old_size, hsize_t new_size); __DLL__ haddr_t H5FDget_eoa(H5FD_t *file); __DLL__ herr_t H5FDset_eoa(H5FD_t *file, haddr_t eof); __DLL__ haddr_t H5FDget_eof(H5FD_t *file); __DLL__ herr_t H5FDread(H5FD_t *file, hid_t dxpl_id, haddr_t addr, hsize_t size, void *buf/*out*/); __DLL__ herr_t H5FDwrite(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t size, const void *buf); __DLL__ herr_t H5FDflush(H5FD_t *file); #ifdef __cplusplus } #endif #endif