summaryrefslogtreecommitdiffstats
path: root/src/H5B2cache.c
diff options
context:
space:
mode:
authorQuincey Koziol <koziol@hdfgroup.org>2005-02-04 21:14:42 (GMT)
committerQuincey Koziol <koziol@hdfgroup.org>2005-02-04 21:14:42 (GMT)
commit24770bf21839352eb3516bc4b472a4ec63176c9f (patch)
treedc7015ad7e1178472c132659aeae41d2c0626b48 /src/H5B2cache.c
parent8ffba3474e33a667e2ada4d55143583b18a1c46e (diff)
downloadhdf5-24770bf21839352eb3516bc4b472a4ec63176c9f.zip
hdf5-24770bf21839352eb3516bc4b472a4ec63176c9f.tar.gz
hdf5-24770bf21839352eb3516bc4b472a4ec63176c9f.tar.bz2
[svn-r9939] Purpose:
New feature Description: Expand v2 B-tree code to support splitting the root node when enough records are inserted and move metadata cache callbacks into their own source file. Platforms tested: FreeBSD 4.11 (sleipnir) w/parallel Too minor for h5committest
Diffstat (limited to 'src/H5B2cache.c')
-rw-r--r--src/H5B2cache.c1003
1 files changed, 1003 insertions, 0 deletions
diff --git a/src/H5B2cache.c b/src/H5B2cache.c
new file mode 100644
index 0000000..fa9538d
--- /dev/null
+++ b/src/H5B2cache.c
@@ -0,0 +1,1003 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created: H5B2.c
+ * Jan 31 2005
+ * Quincey Koziol <koziol@ncsa.uiuc.edu>
+ *
+ * Purpose: Implements a B-tree, with several modifications from
+ * the "standard" methods.
+ *
+ * Please see the documentation in:
+ * doc/html/TechNotes/Btrees.html for a full description
+ * of how they work, etc.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#define H5B2_PACKAGE /*suppress error about including H5B2pkg */
+
+/* Private headers */
+#include "H5private.h" /* Generic Functions */
+#include "H5B2pkg.h" /* B-trees */
+#include "H5Eprivate.h" /* Error handling */
+
+/* Local macros */
+
+/* B-tree format version #'s */
+#define H5B2_HDR_VERSION 0 /* Header */
+#define H5B2_INT_VERSION 0 /* Internal node */
+#define H5B2_LEAF_VERSION 0 /* Leaf node */
+
+
+/* Local typedefs */
+
+/* Local prototypes */
+
+/* Metadata cache callbacks */
+static H5B2_t *H5B2_cache_hdr_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_type, void *udata);
+static herr_t H5B2_cache_hdr_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5B2_t *b);
+static herr_t H5B2_cache_hdr_clear(H5F_t *f, H5B2_t *b, hbool_t destroy);
+static herr_t H5B2_cache_hdr_size(const H5F_t *f, const H5B2_t *bt, size_t *size_ptr);
+static H5B2_leaf_t *H5B2_cache_leaf_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_type, void *udata);
+static herr_t H5B2_cache_leaf_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5B2_leaf_t *l);
+static herr_t H5B2_cache_leaf_clear(H5F_t *f, H5B2_leaf_t *l, hbool_t destroy);
+static herr_t H5B2_cache_leaf_size(const H5F_t *f, const H5B2_leaf_t *l, size_t *size_ptr);
+static H5B2_internal_t *H5B2_cache_internal_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_type, void *udata);
+static herr_t H5B2_cache_internal_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5B2_internal_t *i);
+static herr_t H5B2_cache_internal_clear(H5F_t *f, H5B2_internal_t *i, hbool_t destroy);
+static herr_t H5B2_cache_internal_size(const H5F_t *f, const H5B2_internal_t *i, size_t *size_ptr);
+
+/* Package variables */
+
+/* H5B2 inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_BT2_HDR[1] = {{
+ H5AC_BT2_HDR_ID,
+ (H5AC_load_func_t)H5B2_cache_hdr_load,
+ (H5AC_flush_func_t)H5B2_cache_hdr_flush,
+ (H5AC_dest_func_t)H5B2_cache_hdr_dest,
+ (H5AC_clear_func_t)H5B2_cache_hdr_clear,
+ (H5AC_size_func_t)H5B2_cache_hdr_size,
+}};
+
+/* H5B2 inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_BT2_LEAF[1] = {{
+ H5AC_BT2_LEAF_ID,
+ (H5AC_load_func_t)H5B2_cache_leaf_load,
+ (H5AC_flush_func_t)H5B2_cache_leaf_flush,
+ (H5AC_dest_func_t)H5B2_cache_leaf_dest,
+ (H5AC_clear_func_t)H5B2_cache_leaf_clear,
+ (H5AC_size_func_t)H5B2_cache_leaf_size,
+}};
+
+/* H5B2 inherits cache-like properties from H5AC */
+const H5AC_class_t H5AC_BT2_INT[1] = {{
+ H5AC_BT2_INT_ID,
+ (H5AC_load_func_t)H5B2_cache_internal_load,
+ (H5AC_flush_func_t)H5B2_cache_internal_flush,
+ (H5AC_dest_func_t)H5B2_cache_internal_dest,
+ (H5AC_clear_func_t)H5B2_cache_internal_clear,
+ (H5AC_size_func_t)H5B2_cache_internal_size,
+}};
+
+/* Static variables */
+
+/* Declare a free list to manage B-tree header data to/from disk */
+H5FL_BLK_DEFINE_STATIC(header_block);
+
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_hdr_load
+ *
+ * Purpose: Loads a B-tree header from the disk.
+ *
+ * Return: Success: Pointer to a new B-tree.
+ *
+ * Failure: NULL
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 1 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5B2_t *
+H5B2_cache_hdr_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_type, void UNUSED *udata)
+{
+ const H5B2_class_t *type = (const H5B2_class_t *) _type;
+ size_t node_size, rkey_size; /* Size info for B-tree */
+ unsigned split_percent, merge_percent; /* Split & merge info for B-tree */
+ H5B2_t *bt2 = NULL;
+ size_t size;
+ uint8_t *buf = NULL;
+ uint8_t *p; /* Pointer into raw data buffer */
+ H5B2_t *ret_value;
+
+ FUNC_ENTER_NOAPI(H5B2_cache_hdr_load, NULL)
+
+ /* Check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(type);
+
+ if (NULL==(bt2 = H5FL_MALLOC(H5B2_t)))
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+ HDmemset(&bt2->cache_info,0,sizeof(H5AC_info_t));
+
+ /* Compute the size of the B-tree header on disk */
+ size = H5B2_HEADER_SIZE(f);
+
+ /* Allocate temporary buffer */
+ if ((buf=H5FL_BLK_MALLOC(header_block,size))==NULL)
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
+
+ /* Read header from disk */
+ if (H5F_block_read(f, H5FD_MEM_BTREE, addr, size, dxpl_id, buf)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_READERROR, NULL, "can't read B-tree header")
+
+ p = buf;
+
+ /* magic number */
+ if (HDmemcmp(p, H5B2_HDR_MAGIC, H5B2_SIZEOF_MAGIC))
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "wrong B-tree header signature")
+ p += H5B2_SIZEOF_MAGIC;
+
+ /* version */
+ if (*p++ != H5B2_HDR_VERSION)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "wrong B-tree header version")
+
+ /* B-tree type */
+ if (*p++ != (uint8_t)type->id)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "incorrect B-tree type")
+
+ /* node size (in bytes) */
+ UINT32DECODE(p, node_size);
+
+ /* raw key size (in bytes) */
+ UINT16DECODE(p, rkey_size);
+
+ /* depth of tree */
+ UINT16DECODE(p, bt2->depth);
+
+ /* split & merge %s */
+ UINT16DECODE(p, split_percent);
+ UINT16DECODE(p, merge_percent);
+
+ /* root node pointer */
+ H5F_addr_decode(f, (const uint8_t **)&p, &(bt2->root.addr));
+ UINT16DECODE(p, bt2->root.node_nrec);
+ H5F_DECODE_LENGTH(f, p, bt2->root.all_nrec);
+
+ /* Initialize shared B-tree info */
+ if(H5B2_shared_init(f, bt2, type, node_size, rkey_size, split_percent, merge_percent)<0)
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "can't create shared B-tree info")
+
+ /* Set return value */
+ ret_value = bt2;
+
+done:
+ if(buf)
+ H5FL_BLK_FREE(header_block,buf);
+ if (!ret_value && bt2)
+ (void)H5B2_cache_hdr_dest(f,bt2);
+ FUNC_LEAVE_NOAPI(ret_value)
+} /*lint !e818 Can't make udata a pointer to const */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_hdr_flush
+ *
+ * Purpose: Flushes a dirty B-tree header to disk.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 1 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_hdr_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5B2_t *bt2)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(H5B2_cache_hdr_flush, FAIL)
+
+ /* check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(bt2);
+
+ if (bt2->cache_info.is_dirty) {
+ H5B2_shared_t *shared; /* Shared B-tree information */
+ uint8_t *buf = NULL;
+ uint8_t *p; /* Pointer into raw data buffer */
+ size_t size;
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(bt2->shared);
+ HDassert(shared);
+
+ /* Compute the size of the B-tree header on disk */
+ size = H5B2_HEADER_SIZE(f);
+
+ /* Allocate temporary buffer */
+ if ((buf=H5FL_BLK_MALLOC(header_block,size))==NULL)
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed");
+
+ p = buf;
+
+ /* magic number */
+ HDmemcpy(p, H5B2_HDR_MAGIC, H5B2_SIZEOF_MAGIC);
+ p += H5B2_SIZEOF_MAGIC;
+
+ /* version # */
+ *p++ = H5B2_HDR_VERSION;
+
+ /* b-tree type */
+ *p++ = shared->type->id;
+
+ /* node size (in bytes) */
+ UINT32ENCODE(p, shared->node_size);
+
+ /* raw key size (in bytes) */
+ UINT16ENCODE(p, shared->rkey_size);
+
+ /* depth of tree */
+ UINT16ENCODE(p, bt2->depth);
+
+ /* split & merge %s */
+ UINT16ENCODE(p, shared->split_percent);
+ UINT16ENCODE(p, shared->merge_percent);
+
+ /* root node pointer */
+ H5F_addr_encode(f, &p, bt2->root.addr);
+ UINT16ENCODE(p, bt2->root.node_nrec);
+ H5F_ENCODE_LENGTH(f, p, bt2->root.all_nrec);
+
+ /* Write the B-tree header. */
+ if (H5F_block_write(f, H5FD_MEM_BTREE, addr, size, dxpl_id, buf) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFLUSH, FAIL, "unable to save B-tree header to disk")
+
+ H5FL_BLK_FREE(header_block,buf);
+
+ bt2->cache_info.is_dirty = FALSE;
+ } /* end if */
+
+ if (destroy)
+ if (H5B2_cache_hdr_dest(f,bt2) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to destroy B-tree header")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5B2_cache_hdr_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B_cache_hdr_dest
+ *
+ * Purpose: Destroys a B-tree header in memory.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 1 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+herr_t
+H5B2_cache_hdr_dest(H5F_t UNUSED *f, H5B2_t *bt2)
+{
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_cache_hdr_dest)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(bt2);
+
+ /* Decrement reference count on shared B-tree info */
+ if(bt2->shared)
+ H5RC_DEC(bt2->shared);
+
+ /* Free B-tree header info */
+ H5FL_FREE(H5B2_t,bt2);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5B2_cache_hdr_dest() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_hdr_clear
+ *
+ * Purpose: Mark a B-tree header in memory as non-dirty.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 1 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_hdr_clear(H5F_t *f, H5B2_t *bt2, hbool_t destroy)
+{
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT(H5B2_cache_hdr_clear)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(bt2);
+
+ /* Reset the dirty flag. */
+ bt2->cache_info.is_dirty = FALSE;
+
+ if (destroy)
+ if (H5B2_cache_hdr_dest(f, bt2) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to destroy B-tree header")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5B2_cache_hdr_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_hdr_size
+ *
+ * Purpose: Compute the size in bytes of a B-tree header
+ * on disk, and return it in *size_ptr. On failure,
+ * the value of *size_ptr is undefined.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 1 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_hdr_size(const H5F_t *f, const H5B2_t UNUSED *bt2, size_t *size_ptr)
+{
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_cache_hdr_size)
+
+ /* check arguments */
+ HDassert(f);
+ HDassert(size_ptr);
+
+ /* Set size value */
+ *size_ptr = H5B2_HEADER_SIZE(f);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* H5B2_cache_hdr_size() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_leaf_load
+ *
+ * Purpose: Loads a B-tree leaf from the disk.
+ *
+ * Return: Success: Pointer to a new B-tree leaf node.
+ *
+ * Failure: NULL
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5B2_leaf_t *
+H5B2_cache_leaf_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_bt2, void *_node_ptr)
+{
+ const H5B2_t *bt2 = (const H5B2_t *)_bt2;
+ H5B2_node_ptr_t *node_ptr = (H5B2_node_ptr_t *)_node_ptr;
+ H5B2_leaf_t *leaf = NULL;
+ H5B2_shared_t *shared; /* Shared B-tree information */
+ uint8_t *p; /* Pointer into raw data buffer */
+ uint8_t *native; /* Pointer to native keys */
+ unsigned u; /* Local index variable */
+ H5B2_leaf_t *ret_value;
+
+ FUNC_ENTER_NOAPI(H5B2_cache_leaf_load, NULL)
+
+ /* Check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(bt2);
+
+ if (NULL==(leaf = H5FL_MALLOC(H5B2_leaf_t)))
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+ HDmemset(&leaf->cache_info,0,sizeof(H5AC_info_t));
+
+ /* Share common B-tree information */
+ leaf->shared = bt2->shared;
+ H5RC_INC(leaf->shared);
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(leaf->shared);
+ HDassert(shared);
+
+ /* Read header from disk */
+ if (H5F_block_read(f, H5FD_MEM_BTREE, addr, shared->node_size, dxpl_id, shared->page)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_READERROR, NULL, "can't read B-tree leaf node")
+
+ p = shared->page;
+
+ /* magic number */
+ if (HDmemcmp(p, H5B2_LEAF_MAGIC, H5B2_SIZEOF_MAGIC))
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "wrong B-tree leaf node signature")
+ p += H5B2_SIZEOF_MAGIC;
+
+ /* version */
+ if (*p++ != H5B2_LEAF_VERSION)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "wrong B-tree leaf node version")
+
+ /* B-tree type */
+ if (*p++ != (uint8_t)shared->type->id)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "incorrect B-tree type")
+
+ /* Allocate space for the native keys in memory */
+ if((leaf->leaf_native=H5FL_FAC_MALLOC(shared->leaf_fac))==NULL)
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for B-tree leaf native keys")
+
+ /* Set the number of records in the leaf */
+ leaf->nrec = node_ptr->node_nrec;
+
+ /* Deserialize records for leaf node */
+ native=leaf->leaf_native;
+ for(u=0; u<leaf->nrec; u++) {
+ /* Decode record */
+ if((shared->type->decode)(f,p,native)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTENCODE, NULL, "unable to decode B-tree record");
+
+ /* Move to next record */
+ p += shared->rkey_size;
+ native += shared->type->nkey_size;
+ } /* end for */
+
+ /* Set return value */
+ ret_value = leaf;
+
+done:
+ if (!ret_value && leaf)
+ (void)H5B2_cache_leaf_dest(f,leaf);
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5B2_cache_leaf_load() */ /*lint !e818 Can't make udata a pointer to const */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_leaf_flush
+ *
+ * Purpose: Flushes a dirty B-tree leaf node to disk.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_leaf_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5B2_leaf_t *leaf)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(H5B2_cache_leaf_flush, FAIL)
+
+ /* check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(leaf);
+
+ if (leaf->cache_info.is_dirty) {
+ H5B2_shared_t *shared; /* Shared B-tree information */
+ uint8_t *p; /* Pointer into raw data buffer */
+ uint8_t *native; /* Pointer to native keys */
+ unsigned u; /* Local index variable */
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(leaf->shared);
+ HDassert(shared);
+
+ p = shared->page;
+
+ /* magic number */
+ HDmemcpy(p, H5B2_LEAF_MAGIC, H5B2_SIZEOF_MAGIC);
+ p += H5B2_SIZEOF_MAGIC;
+
+ /* version # */
+ *p++ = H5B2_LEAF_VERSION;
+
+ /* b-tree type */
+ *p++ = shared->type->id;
+
+ /* Serialize records for leaf node */
+ native=leaf->leaf_native;
+ for(u=0; u<leaf->nrec; u++) {
+ /* Encode record */
+ if((shared->type->encode)(f,p,native)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTENCODE, FAIL, "unable to encode B-tree record");
+
+ /* Move to next record */
+ p += shared->rkey_size;
+ native += shared->type->nkey_size;
+ } /* end for */
+
+ /* Write the B-tree leaf node */
+ if (H5F_block_write(f, H5FD_MEM_BTREE, addr, shared->node_size, dxpl_id, shared->page) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFLUSH, FAIL, "unable to save B-tree leaf node to disk")
+
+ leaf->cache_info.is_dirty = FALSE;
+ } /* end if */
+
+ if (destroy)
+ if (H5B2_cache_leaf_dest(f,leaf) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to destroy B-tree leaf node")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5B2_cache_leaf_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B_cache_leaf_dest
+ *
+ * Purpose: Destroys a B-tree leaf node in memory.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+herr_t
+H5B2_cache_leaf_dest(H5F_t UNUSED *f, H5B2_leaf_t *leaf)
+{
+ H5B2_shared_t *shared; /* Shared B-tree information */
+
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_cache_leaf_dest)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(leaf);
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(leaf->shared);
+ HDassert(shared);
+
+ /* Release leaf's native key buffer */
+ if(leaf->leaf_native)
+ H5FL_FAC_FREE(shared->leaf_fac,leaf->leaf_native);
+
+ /* Decrement reference count on shared B-tree info */
+ if(leaf->shared)
+ H5RC_DEC(leaf->shared);
+
+ /* Free B-tree leaf node info */
+ H5FL_FREE(H5B2_leaf_t,leaf);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5B2_cache_leaf_dest() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_leaf_clear
+ *
+ * Purpose: Mark a B-tree leaf node in memory as non-dirty.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_leaf_clear(H5F_t *f, H5B2_leaf_t *leaf, hbool_t destroy)
+{
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT(H5B2_cache_leaf_clear)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(leaf);
+
+ /* Reset the dirty flag. */
+ leaf->cache_info.is_dirty = FALSE;
+
+ if (destroy)
+ if (H5B2_cache_leaf_dest(f, leaf) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to destroy B-tree leaf node")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5B2_cache_leaf_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_leaf_size
+ *
+ * Purpose: Compute the size in bytes of a B-tree leaf node
+ * on disk, and return it in *size_ptr. On failure,
+ * the value of *size_ptr is undefined.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_leaf_size(const H5F_t UNUSED *f, const H5B2_leaf_t *leaf, size_t *size_ptr)
+{
+ H5B2_shared_t *shared; /* Shared B-tree information */
+
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_cache_leaf_size)
+
+ /* check arguments */
+ HDassert(leaf);
+ HDassert(size_ptr);
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(leaf->shared);
+ HDassert(shared);
+
+ /* Set size value */
+ *size_ptr = shared->node_size;
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* H5B2_cache_leaf_size() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_internal_load
+ *
+ * Purpose: Loads a B-tree internal node from the disk.
+ *
+ * Return: Success: Pointer to a new B-tree internal node.
+ *
+ * Failure: NULL
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5B2_internal_t *
+H5B2_cache_internal_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_bt2, void *_node_ptr)
+{
+ const H5B2_t *bt2 = (const H5B2_t *)_bt2;
+ H5B2_node_ptr_t *node_ptr = (H5B2_node_ptr_t *)_node_ptr;
+ H5B2_internal_t *internal = NULL;
+ H5B2_shared_t *shared; /* Shared B-tree information */
+ uint8_t *p; /* Pointer into raw data buffer */
+ uint8_t *native; /* Pointer to native record info */
+ H5B2_node_ptr_t *int_node_ptr; /* Pointer to node pointer info */
+ unsigned u; /* Local index variable */
+ H5B2_internal_t *ret_value;
+
+ FUNC_ENTER_NOAPI(H5B2_cache_internal_load, NULL)
+
+ /* Check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(bt2);
+
+ if (NULL==(internal = H5FL_MALLOC(H5B2_internal_t)))
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+ HDmemset(&internal->cache_info,0,sizeof(H5AC_info_t));
+
+ /* Share common B-tree information */
+ internal->shared = bt2->shared;
+ H5RC_INC(internal->shared);
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(internal->shared);
+ HDassert(shared);
+
+ /* Read header from disk */
+ if (H5F_block_read(f, H5FD_MEM_BTREE, addr, shared->node_size, dxpl_id, shared->page)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_READERROR, NULL, "can't read B-tree internal node")
+
+ p = shared->page;
+
+ /* magic number */
+ if (HDmemcmp(p, H5B2_INT_MAGIC, H5B2_SIZEOF_MAGIC))
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "wrong B-tree internal node signature")
+ p += H5B2_SIZEOF_MAGIC;
+
+ /* version */
+ if (*p++ != H5B2_INT_VERSION)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "wrong B-tree internal node version")
+
+ /* B-tree type */
+ if (*p++ != (uint8_t)shared->type->id)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, NULL, "incorrect B-tree type")
+
+ /* Allocate space for the native keys in memory */
+ if((internal->int_native=H5FL_FAC_MALLOC(shared->int_fac))==NULL)
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for B-tree internal native keys")
+
+ /* Allocate space for the node pointers in memory */
+ if((internal->node_ptrs=H5FL_FAC_MALLOC(shared->node_ptr_fac))==NULL)
+ HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for B-tree internal node pointers")
+
+ /* Set the number of records in the leaf */
+ internal->nrec = node_ptr->node_nrec;
+
+ /* Deserialize records for internal node */
+ native=internal->int_native;
+ for(u=0; u<internal->nrec; u++) {
+ /* Decode record */
+ if((shared->type->decode)(f,p,native)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTENCODE, NULL, "unable to decode B-tree record");
+
+ /* Move to next record */
+ p += shared->rkey_size;
+ native += shared->type->nkey_size;
+ } /* end for */
+
+ /* Serialize node pointers for internal node */
+ int_node_ptr=internal->node_ptrs;
+ for(u=0; u<internal->nrec+1; u++) {
+ /* Decode node pointer */
+ H5F_addr_decode(f, (const uint8_t **)&p, &(int_node_ptr->addr));
+ UINT16DECODE(p, int_node_ptr->node_nrec);
+ H5F_DECODE_LENGTH(f, p, int_node_ptr->all_nrec);
+
+ /* Move to next node pointer */
+ int_node_ptr++;
+ } /* end for */
+
+ /* Set return value */
+ ret_value = internal;
+
+done:
+ if (!ret_value && internal)
+ (void)H5B2_cache_internal_dest(f,internal);
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5B2_cache_internal_load() */ /*lint !e818 Can't make udata a pointer to const */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_internal_flush
+ *
+ * Purpose: Flushes a dirty B-tree internal node to disk.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 3 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_internal_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5B2_internal_t *internal)
+{
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI(H5B2_cache_internal_flush, FAIL)
+
+ /* check arguments */
+ HDassert(f);
+ HDassert(H5F_addr_defined(addr));
+ HDassert(internal);
+
+ if (internal->cache_info.is_dirty) {
+ H5B2_shared_t *shared; /* Shared B-tree information */
+ uint8_t *p; /* Pointer into raw data buffer */
+ uint8_t *native; /* Pointer to native record info */
+ H5B2_node_ptr_t *int_node_ptr; /* Pointer to node pointer info */
+ unsigned u; /* Local index variable */
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(internal->shared);
+ HDassert(shared);
+
+ p = shared->page;
+
+ /* magic number */
+ HDmemcpy(p, H5B2_INT_MAGIC, H5B2_SIZEOF_MAGIC);
+ p += H5B2_SIZEOF_MAGIC;
+
+ /* version # */
+ *p++ = H5B2_INT_VERSION;
+
+ /* b-tree type */
+ *p++ = shared->type->id;
+
+ /* Serialize records for internal node */
+ native=internal->int_native;
+ for(u=0; u<internal->nrec; u++) {
+ /* Encode record */
+ if((shared->type->encode)(f,p,native)<0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTENCODE, FAIL, "unable to encode B-tree record");
+
+ /* Move to next record */
+ p += shared->rkey_size;
+ native += shared->type->nkey_size;
+ } /* end for */
+
+ /* Serialize node pointers for internal node */
+ int_node_ptr=internal->node_ptrs;
+ for(u=0; u<internal->nrec+1; u++) {
+ /* Encode node pointer */
+ H5F_addr_encode(f, &p, int_node_ptr->addr);
+ UINT16ENCODE(p, int_node_ptr->node_nrec);
+ H5F_ENCODE_LENGTH(f, p, int_node_ptr->all_nrec);
+
+ /* Move to next node pointer */
+ int_node_ptr++;
+ } /* end for */
+
+ /* Write the B-tree internal node */
+ if (H5F_block_write(f, H5FD_MEM_BTREE, addr, shared->node_size, dxpl_id, shared->page) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFLUSH, FAIL, "unable to save B-tree internal node to disk")
+
+ internal->cache_info.is_dirty = FALSE;
+ } /* end if */
+
+ if (destroy)
+ if (H5B2_cache_internal_dest(f,internal) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to destroy B-tree internal node")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* H5B2_cache_internal_flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B_cache_internal_dest
+ *
+ * Purpose: Destroys a B-tree internal node in memory.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+/* ARGSUSED */
+herr_t
+H5B2_cache_internal_dest(H5F_t UNUSED *f, H5B2_internal_t *internal)
+{
+ H5B2_shared_t *shared; /* Shared B-tree information */
+
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_cache_internal_dest)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(internal);
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(internal->shared);
+ HDassert(shared);
+
+ /* Release internal node's native key buffer */
+ if(internal->int_native)
+ H5FL_FAC_FREE(shared->int_fac,internal->int_native);
+
+ /* Release internal node's node pointer buffer */
+ if(internal->node_ptrs)
+ H5FL_FAC_FREE(shared->node_ptr_fac,internal->node_ptrs);
+
+ /* Decrement reference count on shared B-tree info */
+ if(internal->shared)
+ H5RC_DEC(internal->shared);
+
+ /* Free B-tree internal node info */
+ H5FL_FREE(H5B2_internal_t,internal);
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5B2_cache_internal_dest() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_internal_clear
+ *
+ * Purpose: Mark a B-tree internal node in memory as non-dirty.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_internal_clear(H5F_t *f, H5B2_internal_t *internal, hbool_t destroy)
+{
+ herr_t ret_value = SUCCEED;
+
+ FUNC_ENTER_NOAPI_NOINIT(H5B2_cache_internal_clear)
+
+ /*
+ * Check arguments.
+ */
+ HDassert(internal);
+
+ /* Reset the dirty flag. */
+ internal->cache_info.is_dirty = FALSE;
+
+ if (destroy)
+ if (H5B2_cache_internal_dest(f, internal) < 0)
+ HGOTO_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to destroy B-tree internal node")
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5B2_cache_internal_clear() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5B2_cache_internal_size
+ *
+ * Purpose: Compute the size in bytes of a B-tree internal node
+ * on disk, and return it in *size_ptr. On failure,
+ * the value of *size_ptr is undefined.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@ncsa.uiuc.edu
+ * Feb 2 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5B2_cache_internal_size(const H5F_t UNUSED *f, const H5B2_internal_t *internal, size_t *size_ptr)
+{
+ H5B2_shared_t *shared; /* Shared B-tree information */
+
+ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5B2_cache_internal_size)
+
+ /* check arguments */
+ HDassert(internal);
+ HDassert(size_ptr);
+
+ /* Get the pointer to the shared B-tree info */
+ shared=H5RC_GET_OBJ(internal->shared);
+ HDassert(shared);
+
+ /* Set size value */
+ *size_ptr = shared->node_size;
+
+ FUNC_LEAVE_NOAPI(SUCCEED)
+} /* H5B2_cache_internal_size() */
+
+