/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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: James Laird * Thursday, March 30, 2006 * * Purpose: This file contains declarations which are visible only within * the H5SM shared object header messages package. Source files * outside the H5SM package should include H5SMprivate.h instead. */ #ifndef _H5SMpkg_H #define _H5SMpkg_H #include "H5SMprivate.h" #include "H5B2private.h" /* B-trees */ #include "H5HFprivate.h" /* Fractal heaps */ /****************************/ /* Package Macros */ /****************************/ #define H5SM_LIST_MAGIC "SMLI" #define H5SM_LIST_SIZEOF_MAGIC 4 #define H5SM_TABLE_MAGIC "SMTB" #define H5SM_TABLE_SIZEOF_MAGIC 4 #define H5SM_SIZEOF_CHECKSUM 4 #define H5SM_MASTER_TABLE_VERSION 0 /* Version of the Shared Object Header Message Master Table*/ #define H5SM_SOHM_ENTRY_SIZE(f) (4 /* Hash value */ \ + 4 /* reference count*/ \ + 8) /* JAMES: size of heap ID on disk */ #define H5SM_TABLE_SIZE(f) ( H5SM_TABLE_SIZEOF_MAGIC \ + 1 /* Table version */ \ + H5SM_SIZEOF_CHECKSUM) /* Checksum */ #define H5SM_INDEX_HEADER_SIZE(f) (1 /* Whether index is a list or B-tree */ \ + 2 /* Type of messages stored in the index */ \ + 4 /* Minimum size of messages to share */ \ + (3 * 2) /* B-tree cutoff, list cutoff, # of shared messages */ \ + H5F_SIZEOF_ADDR(f) /* Location of list or B-tree */ \ + H5F_SIZEOF_ADDR(f)) /* Address of heap */ #define H5SM_LIST_SIZE(f, num_mesg) H5SM_LIST_SIZEOF_MAGIC \ + 1 /* List version */ \ + (H5SM_SOHM_ENTRY_SIZE(f) * num_mesg) \ + H5SM_SIZEOF_CHECKSUM /* Checksum */ #define H5SM_B2_NODE_SIZE 512 #define H5SM_B2_SPLIT_PERCENT 100 #define H5SM_B2_MERGE_PERCENT 40 /****************************/ /* Package Typedefs */ /****************************/ /* There are a number of Shared Object Header Message-specific structs here. * * The H5SM_master_table_t is pointed to by the file superblock. Since a file * can have more than one SOHM index, this table collects all the indexes into * one place. It holds an array of H5SM_index_header_t structs. * * An H5SM_index_header_t is actually the for a given index. It holds * the number of messages in the index, the types of messages in the index, * etc. It also records whether the index is a list or a b-tree, and has * the address of the list or b-tree. * * If the index is a list, the address in the index header should be given * to the cache, which can load it into a H5SM_list_t struct. This is mostly * just a header for the cache information; it contains a pointer back to * the index header and an unsorted array of messages. * * These messages are H5SM_sohm_t structs. They hold the actual SOHM's * address, hash value, and refcount. * * If the index is a b-tree, the H5SM_index_header_t struct holds the address * of the b-tree instead of the address of a H5SM_list_t. The B-tree's nodes * are still 'H5SM_sohm_t's. * * H5SM_mesg_key_t structs are used to search lists and B-trees for a certain * message. They correspond to a message that hasn't yet been written to * disk. */ /* Typedef for a SOHM index node */ typedef struct { uint32_t hash; /* Hash value for OHM */ H5SM_fheap_id_t fheap_id; /* ID of the OHM in the fractal heap */ hsize_t ref_count; /* Number of times this message is used */ } H5SM_sohm_t; typedef enum { H5SM_BADTYPE = -1, H5SM_LIST, /* Index is an unsorted list */ H5SM_BTREE /* Index is a sorted B-tree */ } H5SM_index_type_t; /* Typedef for searching an index (list or B-tree) */ typedef struct { uint32_t hash; /* The hash value for this message */ const void *encoding; /* The message encoded */ size_t encoding_size; /* Size of the encoding */ H5HF_t *fheap; /* The heap for this message type, open. */ H5SM_fheap_id_t mesg_heap_id; /* The heap_id for this message */ } H5SM_mesg_key_t; /* Typedef for a SOHM index header */ typedef struct { unsigned mesg_types; /* Bit flag vector of message types */ size_t min_mesg_size; /* number of messages being tracked */ size_t list_max; /* >= this many messages, index with a B-tree */ size_t btree_min; /* <= this many messages, index with a list again */ size_t num_messages; /* number of messages being tracked */ H5SM_index_type_t index_type; /* Is the index a list or a B-tree? */ haddr_t index_addr; /* Address of the actual index (list or B-tree) */ haddr_t heap_addr; /* Address of the fheap used to store shared messages */ } H5SM_index_header_t; /* Typedef for a SOHM list */ typedef struct { /* Information for H5AC cache functions, _must_ be first field in structure */ H5AC_info_t cache_info; H5SM_index_header_t *header; /* Pointer to the corresponding index header */ H5SM_sohm_t *messages; /* Actual list, stored as an array */ } H5SM_list_t; /* Typedef for shared object header message master table */ typedef struct { /* Information for H5AC cache functions, _must_ be first field in structure */ H5AC_info_t cache_info; unsigned version; /* Version of the table struct */ uint8_t num_indexes; /* Number of indexes */ H5SM_index_header_t *indexes; /* Array of num_indexes indexes */ } H5SM_master_table_t; /* * Data exchange structure to pass through the fractal heap layer for the * H5HF_op function when computing a hash value for a message. */ typedef struct { /* downward (internal) */ unsigned type_id; /* Message type */ /* upward */ uint32_t hash; /* Hash value */ } H5SM_fh_ud_gh_t; /****************************/ /* Package Variables */ /****************************/ /* Declare free lists to manage H5SM structs */ H5FL_ARR_EXTERN(H5SM_index_header_t); H5FL_EXTERN(H5SM_list_t); H5FL_ARR_EXTERN(H5SM_sohm_t); H5_DLLVAR const H5AC_class_t H5AC_SOHM_TABLE[1]; H5_DLLVAR const H5AC_class_t H5AC_SOHM_LIST[1]; H5_DLLVAR const H5B2_class_t H5SM_INDEX[1]; /****************************/ /* Package Prototypes */ /****************************/ /* General routines */ H5_DLL ssize_t H5SM_get_index(const H5SM_master_table_t *table, unsigned type_id); H5_DLL size_t H5SM_find_in_list(H5SM_list_t *list, const H5SM_mesg_key_t *key); /* Encode and decode routines, used for B-tree and cache encoding/decoding */ H5_DLL herr_t H5SM_message_encode(const H5F_t *f, uint8_t *raw, const void *native); H5_DLL herr_t H5SM_message_decode(const H5F_t *f, const uint8_t *raw, void *native); /* Callbacks to give to B-tree traversals */ /* H5SM_message_compare is in H5SMbtree2.c, but is also used by list code * in H5SM.c. */ H5_DLL herr_t H5SM_message_compare(const void *rec1, const void *rec2); /* H5B2_modify_t callbacks to adjust record's refcount. */ H5_DLL herr_t H5SM_incr_ref(void *record, void *op_data, hbool_t *changed); H5_DLL herr_t H5SM_decr_ref(void *record, void *op_data, hbool_t *changed); /* H5B2_remove_t callback to add messages to a list index */ H5_DLL herr_t H5SM_convert_to_list_op(const void * record, void *op_data); /* Fractal heap 'op' callback to compute hash value for message "in place" */ H5_DLL herr_t H5SM_get_hash_fh_cb(const void *obj, size_t obj_len, void *_udata); /* Testing functions */ #ifdef H5SM_TESTING H5_DLL herr_t H5SM_get_refcount_test(H5F_t *f, hid_t dxpl_id, unsigned type_id, const H5O_shared_t *sh_mesg, hsize_t *ref_count); #endif /* H5SM_TESTING */ #endif /* _H5SMpkg_H */