H5Bpkg.h

Go to the documentation of this file.

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * 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 COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
/*
 * Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
 *      Thursday, May 15, 2003
 *
 * Purpose: This file contains declarations which are visible only within
 *      the H5B package.  Source files outside the H5B package should
 *      include H5Bprivate.h instead.
 */
#if !(defined H5B_FRIEND || defined H5B_MODULE)
#error "Do not include this file outside the H5B package!"
#endif
 
#ifndef _H5Bpkg_H
#define _H5Bpkg_H
 
/* Get package's private header */
#include "H5Bprivate.h"
 
/* Other private headers needed by this file */
#include "H5ACprivate.h"    /* Metadata cache           */
#include "H5FLprivate.h"        /* Free Lists                           */
 
 
/**************************/
/* Package Private Macros */
/**************************/
 
/* Get the native key at a given index */
#define H5B_NKEY(b, shared, idx)  ((b)->native + (shared)->nkey[(idx)])
#define LEVEL_BITS  8   /* # of bits for node level: 1 byte */
 
 
/****************************/
/* Package Private Typedefs */
/****************************/
 
/* The B-tree node as stored in memory...  */
typedef struct H5B_t {
    H5AC_info_t        cache_info;     /* Information for H5AC cache functions */
                                        /* _must_ be first field in structure */
    H5UC_t      *rc_shared; /*ref-counted shared info        */
    unsigned        level;      /*node level                 */
    unsigned        nchildren;  /*number of child pointers       */
    haddr_t     left;       /*address of left sibling        */
    haddr_t     right;      /*address of right sibling       */
    uint8_t     *native;    /*array of keys in native format     */
    haddr_t     *child;     /*2k child pointers          */
} H5B_t;
 
/* Callback info for loading a B-tree node into the cache */
typedef struct H5B_cache_ud_t {
    H5F_t *f;                           /* File that B-tree node is within   */
    const struct H5B_class_t *type;     /* Type of tree              */
    H5UC_t *rc_shared;                  /* Ref-counted shared info       */
} H5B_cache_ud_t;
 
/*****************************/
/* Package Private Variables */
/*****************************/
 
/* Declare a free list to manage the haddr_t sequence information */
H5FL_SEQ_EXTERN(haddr_t);
 
/* Declare a PQ free list to manage the native block information */
H5FL_BLK_EXTERN(native_block);
 
/* Declare a free list to manage the H5B_t struct */
H5FL_EXTERN(H5B_t);
 
 
/******************************/
/* Package Private Prototypes */
/******************************/
H5_DLL herr_t H5B__node_dest(H5B_t *bt);
#ifdef H5B_DEBUG
herr_t H5B__assert(H5F_t *f, haddr_t addr, const H5B_class_t *type, void *udata);
#endif
 
#endif /*_H5Bpkg_H*/