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|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 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://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Gnode.c
* Jun 26 1997
* Robb Matzke <matzke@llnl.gov>
*
* Purpose: Functions for handling symbol table nodes. A
* symbol table node is a small collection of symbol
* table entries. A B-tree usually points to the
* symbol table nodes for any given symbol table.
*
*-------------------------------------------------------------------------
*/
#define H5G_PACKAGE /*suppress error about including H5Gpkg */
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
/* Packages needed by this file... */
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5FLprivate.h" /* Free Lists */
#include "H5Gpkg.h" /* Groups */
#include "H5HLprivate.h" /* Local Heaps */
#include "H5MFprivate.h" /* File memory management */
#include "H5MMprivate.h" /* Memory management */
#include "H5WBprivate.h" /* Wrapped Buffers */
/* Private typedefs */
/*
* Each key field of the B-link tree that points to symbol table
* nodes consists of this structure...
*/
typedef struct H5G_node_key_t {
size_t offset; /*offset into heap for name */
} H5G_node_key_t;
/*
* A symbol table node is a collection of symbol table entries. It can
* be thought of as the lowest level of the B-link tree that points to
* a collection of symbol table entries that belong to a specific symbol
* table or group.
*/
typedef struct H5G_node_t {
H5AC_info_t cache_info; /* Information for H5AC cache functions, _must_ be */
/* first field in structure */
unsigned nsyms; /*number of symbols */
H5G_entry_t *entry; /*array of symbol table entries */
} H5G_node_t;
/* Private macros */
#define H5G_NODE_VERS 1 /*symbol table node version number */
#define H5G_NODE_SIZEOF_HDR(F) (H5G_NODE_SIZEOF_MAGIC + 4)
/* Size of stack buffer for serialized nodes */
#define H5G_NODE_BUF_SIZE 512
/* PRIVATE PROTOTYPES */
static herr_t H5G_node_serialize(H5F_t *f, H5G_node_t *sym, size_t size, uint8_t *buf);
static size_t H5G_node_size_real(const H5F_t *f);
/* Metadata cache callbacks */
static H5G_node_t *H5G_node_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_udata1,
void *_udata2);
static herr_t H5G_node_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr,
H5G_node_t *sym, unsigned UNUSED * flags_ptr);
static herr_t H5G_node_dest(H5F_t *f, H5G_node_t *sym);
static herr_t H5G_node_clear(H5F_t *f, H5G_node_t *sym, hbool_t destroy);
static herr_t H5G_node_size(const H5F_t *f, const H5G_node_t *sym, size_t *size_ptr);
/* B-tree callbacks */
static H5RC_t *H5G_node_get_shared(const H5F_t *f, const void *_udata);
static herr_t H5G_node_create(H5F_t *f, hid_t dxpl_id, H5B_ins_t op, void *_lt_key,
void *_udata, void *_rt_key,
haddr_t *addr_p/*out*/);
static int H5G_node_cmp2(void *_lt_key, void *_udata, void *_rt_key);
static int H5G_node_cmp3(void *_lt_key, void *_udata, void *_rt_key);
static herr_t H5G_node_found(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_lt_key,
void *_udata);
static H5B_ins_t H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key,
hbool_t *lt_key_changed, void *_md_key,
void *_udata, void *_rt_key,
hbool_t *rt_key_changed,
haddr_t *new_node_p/*out*/);
static H5B_ins_t H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *lt_key,
hbool_t *lt_key_changed, void *udata,
void *rt_key, hbool_t *rt_key_changed);
static herr_t H5G_node_decode_key(const H5B_shared_t *shared, const uint8_t *raw, void *_key);
static herr_t H5G_node_encode_key(const H5B_shared_t *shared, uint8_t *raw, const void *_key);
static herr_t H5G_node_debug_key(FILE *stream, int indent, int fwidth,
const void *key, const void *udata);
/* H5G inherits cache-like properties from H5AC */
const H5AC_class_t H5AC_SNODE[1] = {{
H5AC_SNODE_ID,
(H5AC_load_func_t)H5G_node_load,
(H5AC_flush_func_t)H5G_node_flush,
(H5AC_dest_func_t)H5G_node_dest,
(H5AC_clear_func_t)H5G_node_clear,
(H5AC_size_func_t)H5G_node_size,
}};
/* H5G inherits B-tree like properties from H5B */
H5B_class_t H5B_SNODE[1] = {{
H5B_SNODE_ID, /*id */
sizeof(H5G_node_key_t), /*sizeof_nkey */
H5G_node_get_shared, /*get_shared */
H5G_node_create, /*new */
H5G_node_cmp2, /*cmp2 */
H5G_node_cmp3, /*cmp3 */
H5G_node_found, /*found */
H5G_node_insert, /*insert */
TRUE, /*follow min branch? */
TRUE, /*follow max branch? */
H5G_node_remove, /*remove */
H5G_node_decode_key, /*decode */
H5G_node_encode_key, /*encode */
H5G_node_debug_key, /*debug */
}};
/* Declare a free list to manage the H5G_node_t struct */
H5FL_DEFINE_STATIC(H5G_node_t);
/* Declare a free list to manage sequences of H5G_entry_t's */
H5FL_SEQ_DEFINE_STATIC(H5G_entry_t);
/*-------------------------------------------------------------------------
* Function: H5G_node_get_shared
*
* Purpose: Returns the shared B-tree info for the specified UDATA.
*
* Return: Success: Pointer to the raw B-tree page for this
file's groups
*
* Failure: Can't fail
*
* Programmer: Robb Matzke
* Wednesday, October 8, 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static H5RC_t *
H5G_node_get_shared(const H5F_t *f, const void UNUSED *_udata)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_get_shared)
HDassert(f);
/* Return the pointer to the ref-count object */
FUNC_LEAVE_NOAPI(H5F_GRP_BTREE_SHARED(f))
} /* end H5G_node_get_shared() */
/*-------------------------------------------------------------------------
* Function: H5G_node_decode_key
*
* Purpose: Decodes a raw key into a native key.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 8 1997
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_decode_key(const H5B_shared_t *shared, const uint8_t *raw, void *_key)
{
H5G_node_key_t *key = (H5G_node_key_t *) _key;
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_decode_key)
HDassert(shared);
HDassert(raw);
HDassert(key);
H5F_DECODE_LENGTH_LEN(raw, key->offset, shared->sizeof_len);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_node_decode_key() */
/*-------------------------------------------------------------------------
* Function: H5G_node_encode_key
*
* Purpose: Encodes a native key into a raw key.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jul 8 1997
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_encode_key(const H5B_shared_t *shared, uint8_t *raw, const void *_key)
{
const H5G_node_key_t *key = (const H5G_node_key_t *) _key;
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_encode_key)
HDassert(shared);
HDassert(raw);
HDassert(key);
H5F_ENCODE_LENGTH_LEN(raw, key->offset, shared->sizeof_len);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_node_encode_key() */
/*-------------------------------------------------------------------------
* Function: H5G_node_debug_key
*
* Purpose: Prints a key.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Friday, February 28, 2003
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_debug_key(FILE *stream, int indent, int fwidth, const void *_key,
const void *_udata)
{
const H5G_node_key_t *key = (const H5G_node_key_t *) _key;
const H5G_bt_common_t *udata = (const H5G_bt_common_t *) _udata;
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_debug_key)
HDassert(key);
HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth, "Heap offset:",
(unsigned)key->offset);
if(udata->heap) {
const char *s;
HDfprintf(stream, "%*s%-*s ", indent, "", fwidth, "Name:");
s = H5HL_offset_into(udata->heap, key->offset);
HDfprintf(stream, "%s\n", s);
} /* end if */
else
HDfprintf(stream, "%*s%-*s ", indent, "", fwidth, "Cannot get name; heap address not specified\n");
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_node_debug_key() */
/*-------------------------------------------------------------------------
* Function: H5G_node_size_real
*
* Purpose: Returns the total size of a symbol table node.
*
* Return: Success: Total size of the node in bytes.
*
* Failure: Never fails.
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
*-------------------------------------------------------------------------
*/
static size_t
H5G_node_size_real(const H5F_t *f)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_size_real);
FUNC_LEAVE_NOAPI(H5G_NODE_SIZEOF_HDR(f) +
(2 * H5F_SYM_LEAF_K(f)) * H5G_SIZEOF_ENTRY(f));
} /* end H5G_node_size_real() */
/*-------------------------------------------------------------------------
* Function: H5G_node_load
*
* Purpose: Loads a symbol table node from the file.
*
* Return: Success: Ptr to the new table.
* Failure: NULL
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
*-------------------------------------------------------------------------
*/
static H5G_node_t *
H5G_node_load(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void UNUSED *_udata1,
void UNUSED * _udata2)
{
H5G_node_t *sym = NULL;
size_t size;
H5WB_t *wb = NULL; /* Wrapped buffer for node data */
uint8_t node_buf[H5G_NODE_BUF_SIZE]; /* Buffer for node */
uint8_t *node; /* Pointer to node buffer */
const uint8_t *p;
H5G_node_t *ret_value; /*for error handling */
FUNC_ENTER_NOAPI_NOINIT(H5G_node_load)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(!_udata1);
HDassert(NULL == _udata2);
/*
* Initialize variables.
*/
/* Wrap the local buffer for serialized node info */
if(NULL == (wb = H5WB_wrap(node_buf, sizeof(node_buf))))
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "can't wrap buffer")
/* Compute the size of the serialized symbol table node on disk */
size = H5G_node_size_real(f);
/* Get a pointer to a buffer that's large enough for node */
if(NULL == (node = H5WB_actual(wb, size)))
HGOTO_ERROR(H5E_SYM, H5E_NOSPACE, NULL, "can't get actual buffer")
/* Read the serialized symbol table node. */
if(H5F_block_read(f, H5FD_MEM_BTREE, addr, size, dxpl_id, node) < 0)
HGOTO_ERROR(H5E_SYM, H5E_READERROR, NULL, "unable to read symbol table node")
/* Get temporary pointer to serialized node */
p = node;
/* magic */
if(HDmemcmp(p, H5G_NODE_MAGIC, (size_t)H5G_NODE_SIZEOF_MAGIC))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "bad symbol table node signature")
p += 4;
/* version */
if(H5G_NODE_VERS != *p++)
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "bad symbol table node version")
/* reserved */
p++;
/* Allocate symbol table data structures */
if(NULL == (sym = H5FL_CALLOC(H5G_node_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
if(NULL == (sym->entry = H5FL_SEQ_CALLOC(H5G_entry_t, (size_t)(2 * H5F_SYM_LEAF_K(f)))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
/* number of symbols */
UINT16DECODE(p, sym->nsyms);
/* entries */
if(H5G_ent_decode_vec(f, &p, sym->entry, sym->nsyms) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "unable to decode symbol table entries")
/* Set return value */
ret_value = sym;
done:
/* Release resources */
if(wb && H5WB_unwrap(wb) < 0)
HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, NULL, "can't close wrapped buffer")
if(!ret_value)
if(sym && H5G_node_dest(f, sym) < 0)
HDONE_ERROR(H5E_SYM, H5E_CANTFREE, NULL, "unable to destroy symbol table node")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_load() */
/*-------------------------------------------------------------------------
* Function: H5G_node_flush
*
* Purpose: Flush a symbol table node to disk.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_flush(H5F_t *f, hid_t dxpl_id, hbool_t destroy, haddr_t addr, H5G_node_t *sym, unsigned UNUSED * flags_ptr)
{
H5WB_t *wb = NULL; /* Wrapped buffer for node data */
uint8_t node_buf[H5G_NODE_BUF_SIZE]; /* Buffer for node */
unsigned u;
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_node_flush)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(sym);
/*
* Look for dirty entries and set the node dirty flag.
*/
for(u = 0; u < sym->nsyms; u++)
if(sym->entry[u].dirty) {
/* Set the node's dirty flag */
sym->cache_info.is_dirty = TRUE;
/* Reset the entry's dirty flag */
sym->entry[u].dirty = FALSE;
} /* end if */
/*
* Write the symbol node to disk.
*/
if(sym->cache_info.is_dirty) {
uint8_t *node; /* Pointer to node buffer */
size_t size;
/* Wrap the local buffer for serialized node info */
if(NULL == (wb = H5WB_wrap(node_buf, sizeof(node_buf))))
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't wrap buffer")
/* Compute the size of the serialized symbol table node on disk */
size = H5G_node_size_real(f);
/* Get a pointer to a buffer that's large enough for node */
if(NULL == (node = H5WB_actual(wb, size)))
HGOTO_ERROR(H5E_SYM, H5E_NOSPACE, FAIL, "can't get actual buffer")
/* Serialize symbol table node into buffer */
if(H5G_node_serialize(f, sym, size, node) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTSERIALIZE, FAIL, "node serialization failed")
/* Write the serialized symbol table node. */
if(H5F_block_write(f, H5FD_MEM_BTREE, addr, size, dxpl_id, node) < 0)
HGOTO_ERROR(H5E_SYM, H5E_WRITEERROR, FAIL, "unable to write symbol table node to the file")
/* Reset the node's dirty flag */
sym->cache_info.is_dirty = FALSE;
} /* end if */
/*
* Destroy the symbol node? This might happen if the node is being
* preempted from the cache.
*/
if(destroy)
if(H5G_node_dest(f, sym) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to destroy symbol table node")
done:
/* Release resources */
if(wb && H5WB_unwrap(wb) < 0)
HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close wrapped buffer")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_flush() */
/*-------------------------------------------------------------------------
* Function: H5G_node_serialize
*
* Purpose: Serialize the symbol table node
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Bill Wendling
* wendling@ncsa.uiuc.edu
* Sept. 16, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_serialize(H5F_t *f, H5G_node_t *sym, size_t size, uint8_t *buf)
{
uint8_t *p;
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT(H5G_node_serialize);
/* check args */
assert(f);
assert(sym);
assert(buf);
p = buf;
/* magic number */
HDmemcpy(p, H5G_NODE_MAGIC, (size_t)H5G_NODE_SIZEOF_MAGIC);
p += 4;
/* version number */
*p++ = H5G_NODE_VERS;
/* reserved */
*p++ = 0;
/* number of symbols */
UINT16ENCODE(p, sym->nsyms);
/* entries */
if(H5G_ent_encode_vec(f, &p, sym->entry, sym->nsyms) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTENCODE, FAIL, "can't serialize")
HDmemset(p, 0, size - (p - buf));
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_serialize() */
/*-------------------------------------------------------------------------
* Function: H5G_node_dest
*
* Purpose: Destroy a symbol table node in memory.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Jan 15 2003
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_dest(H5F_t UNUSED *f, H5G_node_t *sym)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_dest)
/* Check arguments */
HDassert(sym);
/* Verify that node is clean */
HDassert(sym->cache_info.is_dirty == FALSE);
if(sym->entry)
sym->entry = H5FL_SEQ_FREE(H5G_entry_t, sym->entry);
H5FL_FREE(H5G_node_t, sym);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_node_dest() */
/*-------------------------------------------------------------------------
* Function: H5G_node_clear
*
* Purpose: Mark a symbol table node in memory as non-dirty.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@ncsa.uiuc.edu
* Mar 20 2003
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_clear(H5F_t *f, H5G_node_t *sym, hbool_t destroy)
{
unsigned u; /* Local index variable */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT(H5G_node_clear)
/*
* Check arguments.
*/
HDassert(sym);
/* Look for dirty entries and reset their dirty flag. */
for(u = 0; u < sym->nsyms; u++)
sym->entry[u].dirty = FALSE;
sym->cache_info.is_dirty = FALSE;
/*
* Destroy the symbol node? This might happen if the node is being
* preempted from the cache.
*/
if(destroy)
if(H5G_node_dest(f, sym) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to destroy symbol table node")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_clear() */
/*-------------------------------------------------------------------------
* Function: H5G_node_size
*
* Purpose: Compute the size in bytes of the specified instance of
* H5G_node_t 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: John Mainzer
* 5/13/04
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_size(const H5F_t *f, const H5G_node_t UNUSED *sym, size_t *size_ptr)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_size)
/*
* Check arguments.
*/
HDassert(f);
HDassert(size_ptr);
*size_ptr = H5G_node_size_real(f);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* H5G_node_size() */
/*-------------------------------------------------------------------------
* Function: H5G_node_create
*
* Purpose: Creates a new empty symbol table node. This function is
* called by the B-tree insert function for an empty tree. It
* is also called internally to split a symbol node with LT_KEY
* and RT_KEY null pointers.
*
* Return: Success: Non-negative. The address of symbol table
* node is returned through the ADDR_P argument.
*
* Failure: Negative
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_create(H5F_t *f, hid_t dxpl_id, H5B_ins_t UNUSED op, void *_lt_key,
void UNUSED *_udata, void *_rt_key, haddr_t *addr_p/*out*/)
{
H5G_node_key_t *lt_key = (H5G_node_key_t *) _lt_key;
H5G_node_key_t *rt_key = (H5G_node_key_t *) _rt_key;
H5G_node_t *sym = NULL;
hsize_t size = 0;
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_node_create)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5B_INS_FIRST == op);
if(NULL == (sym = H5FL_CALLOC(H5G_node_t)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
size = H5G_node_size_real(f);
HDassert(size);
if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, size)))
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to allocate file space")
if(NULL == ( sym->entry = H5FL_SEQ_CALLOC(H5G_entry_t, (size_t)(2 * H5F_SYM_LEAF_K(f)))))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
if(H5AC_set(f, dxpl_id, H5AC_SNODE, *addr_p, sym, H5AC__NO_FLAGS_SET) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to cache symbol table leaf node")
/*
* The left and right symbols in an empty tree are both the
* empty string stored at offset zero by the H5G functions. This
* allows the comparison functions to work correctly without knowing
* that there are no symbols.
*/
if(lt_key)
lt_key->offset = 0;
if(rt_key)
rt_key->offset = 0;
done:
if(ret_value < 0) {
if(sym != NULL) {
if(sym->entry != NULL)
H5FL_SEQ_FREE(H5G_entry_t, sym->entry);
H5FL_FREE(H5G_node_t, sym);
} /* end if */
} /* end if */
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_create() */
/*-------------------------------------------------------------------------
* Function: H5G_node_cmp2
*
* Purpose: Compares two keys from a B-tree node (LT_KEY and RT_KEY).
* The UDATA pointer supplies extra data not contained in the
* keys (in this case, the heap address).
*
* Return: Success: negative if LT_KEY is less than RT_KEY.
*
* positive if LT_KEY is greater than RT_KEY.
*
* zero if LT_KEY and RT_KEY are equal.
*
* Failure: FAIL (same as LT_KEY<RT_KEY)
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static int
H5G_node_cmp2(void *_lt_key, void *_udata, void *_rt_key)
{
H5G_bt_common_t *udata = (H5G_bt_common_t *) _udata;
H5G_node_key_t *lt_key = (H5G_node_key_t *) _lt_key;
H5G_node_key_t *rt_key = (H5G_node_key_t *) _rt_key;
const char *s1, *s2;
const char *base; /* Base of heap */
int ret_value;
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_cmp2)
/* Sanity checks */
HDassert(udata && udata->heap);
HDassert(lt_key);
HDassert(rt_key);
/* Get base address of heap */
base = H5HL_offset_into(udata->heap, (size_t)0);
HDassert(base);
/* Get pointers to string names */
s1 = base + lt_key->offset;
s2 = base + rt_key->offset;
/* Set return value */
ret_value = HDstrcmp(s1, s2);
FUNC_LEAVE_NOAPI(ret_value)
} /* H5G_node_cmp2() */
/*-------------------------------------------------------------------------
* Function: H5G_node_cmp3
*
* Purpose: Compares two keys from a B-tree node (LT_KEY and RT_KEY)
* against another key (not necessarily the same type)
* pointed to by UDATA.
*
* Return: Success: negative if the UDATA key is less than
* or equal to the LT_KEY
*
* positive if the UDATA key is greater
* than the RT_KEY.
*
* zero if the UDATA key falls between
* the LT_KEY (exclusive) and the
* RT_KEY (inclusive).
*
* Failure: FAIL (same as UDATA < LT_KEY)
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static int
H5G_node_cmp3(void *_lt_key, void *_udata, void *_rt_key)
{
H5G_bt_common_t *udata = (H5G_bt_common_t *) _udata;
H5G_node_key_t *lt_key = (H5G_node_key_t *) _lt_key;
H5G_node_key_t *rt_key = (H5G_node_key_t *) _rt_key;
const char *s;
const char *base; /* Base of heap */
int ret_value = 0; /* Return value */
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_cmp3)
/* Sanity checks */
HDassert(udata && udata->heap);
HDassert(lt_key);
HDassert(rt_key);
/* Get base address of heap */
base = H5HL_offset_into(udata->heap, (size_t)0);
HDassert(base);
/* left side */
s = base + lt_key->offset;
if(HDstrcmp(udata->name, s) <= 0)
ret_value = (-1);
else {
/* right side */
s = base + rt_key->offset;
if(HDstrcmp(udata->name, s) > 0)
ret_value = 1;
} /* end else */
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_cmp3() */
/*-------------------------------------------------------------------------
* Function: H5G_node_found
*
* Purpose: The B-tree search engine has found the symbol table node
* which contains the requested symbol if the symbol exists.
* This function should examine that node for the symbol and
* return information about the symbol through the UDATA
* structure which contains the symbol name on function
* entry.
*
* If the operation flag in UDATA is H5G_OPER_FIND, then
* the entry is copied from the symbol table to the UDATA
* entry field. Otherwise the entry is copied from the
* UDATA entry field to the symbol table.
*
* Return: Success: Non-negative if found and data returned through
* the UDATA pointer.
*
* Failure: Negative if not found.
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 23 1997
*
*-------------------------------------------------------------------------
*/
static herr_t
H5G_node_found(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void UNUSED *_lt_key,
void *_udata)
{
H5G_bt_lkp_t *udata = (H5G_bt_lkp_t *)_udata;
H5G_node_t *sn = NULL;
unsigned lt = 0, idx = 0, rt;
int cmp = 1;
const char *s;
const char *base; /* Base of heap */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5G_node_found)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(udata && udata->common.heap);
/*
* Load the symbol table node for exclusive access.
*/
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to protect symbol table node")
/* Get base address of heap */
base = H5HL_offset_into(udata->common.heap, (size_t)0);
HDassert(base);
/*
* Binary search.
*/
rt = sn->nsyms;
while(lt < rt && cmp) {
idx = (lt + rt) / 2;
s = base + sn->entry[idx].name_off;
cmp = HDstrcmp(udata->common.name, s);
if (cmp < 0)
rt = idx;
else
lt = idx + 1;
} /* end while */
if(cmp)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")
/* Call user's callback operator */
if((udata->op)(&sn->entry[idx], udata->op_data) < 0)
HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "iterator callback failed")
done:
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to release symbol table node")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_found() */
/*-------------------------------------------------------------------------
* Function: H5G_node_insert
*
* Purpose: The B-tree insertion engine has found the symbol table node
* which should receive the new symbol/address pair. This
* function adds it to that node unless it already existed.
*
* If the node has no room for the symbol then the node is
* split into two nodes. The original node contains the
* low values and the new node contains the high values.
* The new symbol table entry is added to either node as
* appropriate. When a split occurs, this function will
* write the maximum key of the low node to the MID buffer
* and return the address of the new node.
*
* If the new key is larger than RIGHT then update RIGHT
* with the new key.
*
* Return: Success: An insertion command for the caller, one of
* the H5B_INS_* constants. The address of the
* new node, if any, is returned through the
* NEW_NODE_P argument. NEW_NODE_P might not be
* initialized if the return value is
* H5B_INS_NOOP.
*
* Failure: H5B_INS_ERROR, NEW_NODE_P might not be
* initialized.
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 24 1997
*
*-------------------------------------------------------------------------
*/
static H5B_ins_t
H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
void UNUSED *_lt_key, hbool_t UNUSED *lt_key_changed,
void *_md_key, void *_udata,
void *_rt_key, hbool_t *rt_key_changed,
haddr_t *new_node_p)
{
H5G_node_key_t *md_key = (H5G_node_key_t *) _md_key;
H5G_node_key_t *rt_key = (H5G_node_key_t *) _rt_key;
H5G_bt_ins_t *udata = (H5G_bt_ins_t *) _udata;
H5G_node_t *sn = NULL, *snrt = NULL;
unsigned sn_flags = H5AC__NO_FLAGS_SET, snrt_flags = H5AC__NO_FLAGS_SET;
const char *s;
const char *base; /* Base of heap */
unsigned lt = 0, rt; /* Binary search cntrs */
int cmp = 1, idx = -1;
H5G_node_t *insert_into = NULL; /*node that gets new entry*/
H5G_entry_t ent; /* Entry to insert in node */
H5B_ins_t ret_value = H5B_INS_ERROR;
FUNC_ENTER_NOAPI_NOINIT(H5G_node_insert)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(md_key);
HDassert(rt_key);
HDassert(udata && udata->common.heap);
HDassert(new_node_p);
/*
* Load the symbol node.
*/
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_WRITE)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to protect symbol table node")
/* Get base address of heap */
base = H5HL_offset_into(udata->common.heap, (size_t)0);
HDassert(base);
/*
* Where does the new symbol get inserted? We use a binary search.
*/
rt = sn->nsyms;
while(lt < rt) {
idx = (lt + rt) / 2;
s = base + sn->entry[idx].name_off;
/* Check if symbol is already present */
if(0 == (cmp = HDstrcmp(udata->common.name, s)))
HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, H5B_INS_ERROR, "symbol is already present in symbol table")
if (cmp < 0)
rt = idx;
else
lt = idx + 1;
} /* end while */
idx += cmp > 0 ? 1 : 0;
/* Convert link information & name to symbol table entry */
if(H5G_ent_convert(f, dxpl_id, udata->common.heap, udata->common.name, udata->lnk, &ent) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, H5B_INS_ERROR, "unable to convert link")
/* Determine where to place entry in node */
if(sn->nsyms >= 2 * H5F_SYM_LEAF_K(f)) {
/*
* The node is full. Split it into a left and right
* node and return the address of the new right node (the
* left node is at the same address as the original node).
*/
ret_value = H5B_INS_RIGHT;
/* The right node */
if(H5G_node_create(f, dxpl_id, H5B_INS_FIRST, NULL, NULL, NULL, new_node_p/*out*/) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5B_INS_ERROR, "unable to split symbol table node")
if(NULL == (snrt = H5AC_protect(f, dxpl_id, H5AC_SNODE, *new_node_p, NULL, NULL, H5AC_WRITE)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to split symbol table node")
HDmemcpy(snrt->entry, sn->entry + H5F_SYM_LEAF_K(f),
H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
snrt->nsyms = H5F_SYM_LEAF_K(f);
snrt_flags |= H5AC__DIRTIED_FLAG;
/* The left node */
HDmemset(sn->entry + H5F_SYM_LEAF_K(f), 0,
H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
sn->nsyms = H5F_SYM_LEAF_K(f);
sn_flags |= H5AC__DIRTIED_FLAG;
/* The middle key */
md_key->offset = sn->entry[sn->nsyms - 1].name_off;
/* Where to insert the new entry? */
if(idx <= (int)H5F_SYM_LEAF_K(f)) {
insert_into = sn;
if(idx == (int)H5F_SYM_LEAF_K(f))
md_key->offset = ent.name_off;
} else {
idx -= H5F_SYM_LEAF_K(f);
insert_into = snrt;
if(idx == (int)H5F_SYM_LEAF_K (f)) {
rt_key->offset = ent.name_off;
*rt_key_changed = TRUE;
} /* end if */
} /* end else */
} else {
/* Where to insert the new entry? */
ret_value = H5B_INS_NOOP;
sn_flags |= H5AC__DIRTIED_FLAG;
insert_into = sn;
if(idx == (int)sn->nsyms) {
rt_key->offset = ent.name_off;
*rt_key_changed = TRUE;
} /* end if */
} /* end else */
/* Move entries down to make room for new entry */
HDmemmove(insert_into->entry + idx + 1, insert_into->entry + idx,
(insert_into->nsyms - idx) * sizeof(H5G_entry_t));
/* Copy new entry into table */
H5G_ent_copy(&(insert_into->entry[idx]), &ent, H5_COPY_SHALLOW);
/* Flag entry as dirty */
insert_into->entry[idx].dirty = TRUE;
/* Increment # of symbols in table */
insert_into->nsyms += 1;
done:
if(snrt && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, *new_node_p, snrt, snrt_flags) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to release symbol table node")
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, sn_flags) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to release symbol table node")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_insert() */
/*-------------------------------------------------------------------------
* Function: H5G_node_remove
*
* Purpose: The B-tree removal engine has found the symbol table node
* which should contain the name which is being removed. This
* function removes the name from the symbol table and
* decrements the link count on the object to which the name
* points.
*
* If the udata->name parameter is set to NULL, then remove
* all entries in this symbol table node. This only occurs
* during the deletion of the entire group, so don't bother
* freeing individual name entries in the local heap, the group's
* symbol table removal code will just free the entire local
* heap eventually. Do reduce the link counts for each object
* however.
*
* Return: Success: If all names are removed from the symbol
* table node then H5B_INS_REMOVE is returned;
* otherwise H5B_INS_NOOP is returned.
*
* Failure: H5B_INS_ERROR
*
* Programmer: Robb Matzke
* Thursday, September 24, 1998
*
*-------------------------------------------------------------------------
*/
static H5B_ins_t
H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
hbool_t UNUSED *lt_key_changed/*out*/,
void *_udata/*in,out*/, void *_rt_key/*in,out*/,
hbool_t *rt_key_changed/*out*/)
{
H5G_node_key_t *lt_key = (H5G_node_key_t *)_lt_key;
H5G_node_key_t *rt_key = (H5G_node_key_t *)_rt_key;
H5G_bt_rm_t *udata = (H5G_bt_rm_t *)_udata;
H5G_node_t *sn = NULL;
unsigned sn_flags = H5AC__NO_FLAGS_SET;
unsigned lt = 0, rt, idx = 0;
int cmp = 1;
H5B_ins_t ret_value = H5B_INS_ERROR;
FUNC_ENTER_NOAPI_NOINIT(H5G_node_remove)
/* Check arguments */
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(lt_key);
HDassert(rt_key);
HDassert(udata && udata->common.heap);
/* Load the symbol table */
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_WRITE)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to protect symbol table node")
/* "Normal" removal of a single entry from the symbol table node */
if(udata->common.name != NULL) {
H5O_link_t lnk; /* Constructed link for replacement */
size_t len; /* Length of string in local heap */
const char *base; /* Base of heap */
/* Get base address of heap */
base = H5HL_offset_into(udata->common.heap, (size_t)0);
/* Find the name with a binary search */
rt = sn->nsyms;
while(lt < rt && cmp) {
const char *s; /* Pointer to string in local heap */
idx = (lt + rt) / 2;
s = base + sn->entry[idx].name_off;
cmp = HDstrcmp(udata->common.name, s);
if(cmp < 0)
rt = idx;
else
lt = idx + 1;
} /* end while */
if(cmp)
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5B_INS_ERROR, "name not found")
/* Get a pointer to the name of the link */
if(NULL == (lnk.name = H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)))
HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get link name")
/* Set up rest of link structure */
lnk.corder_valid = FALSE;
lnk.corder = 0;
lnk.cset = H5T_CSET_ASCII;
if(sn->entry[idx].type == H5G_CACHED_SLINK) {
lnk.type = H5L_TYPE_SOFT;
lnk.u.soft.name = H5HL_offset_into(udata->common.heap, sn->entry[idx].cache.slink.lval_offset);
} /* end if */
else {
lnk.type = H5L_TYPE_HARD;
HDassert(H5F_addr_defined(sn->entry[idx].header));
lnk.u.hard.addr = sn->entry[idx].header;
} /* end else */
/* Replace any object names */
if(H5G_link_name_replace(f, dxpl_id, udata->grp_full_path_r, &lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get object type")
/* Decrement the ref. count for hard links */
if(lnk.type == H5L_TYPE_HARD) {
H5O_loc_t tmp_oloc; /* Temporary object location */
/* Build temporary object location */
tmp_oloc.file = f;
tmp_oloc.addr = lnk.u.hard.addr;
if(H5O_link(&tmp_oloc, -1, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5B_INS_ERROR, "unable to decrement object link count")
} /* end if */
else {
/* Remove the soft link's value from the local heap */
if(lnk.u.soft.name) {
len = HDstrlen(lnk.u.soft.name) + 1;
if(H5HL_remove(f, dxpl_id, udata->common.heap, sn->entry[idx].cache.slink.lval_offset, len) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, H5B_INS_ERROR, "unable to remove soft link from local heap")
} /* end if */
} /* end else */
/* Remove the link's name from the local heap */
len = HDstrlen(lnk.name) + 1;
if(H5HL_remove(f, dxpl_id, udata->common.heap, sn->entry[idx].name_off, len) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, H5B_INS_ERROR, "unable to remove link name from local heap")
/* Remove the entry from the symbol table node */
if(1 == sn->nsyms) {
/*
* We are about to remove the only symbol in this node. Copy the left
* key to the right key and mark the right key as dirty. Free this
* node and indicate that the pointer to this node in the B-tree
* should be removed also.
*/
HDassert(0 == idx);
*rt_key = *lt_key;
*rt_key_changed = TRUE;
sn->nsyms = 0;
if(H5MF_xfree(f, H5FD_MEM_BTREE, dxpl_id, addr, (hsize_t)H5G_node_size_real(f)) < 0
|| H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__DIRTIED_FLAG | H5C__DELETED_FLAG) < 0) {
sn = NULL;
HGOTO_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to free symbol table node")
} /* end if */
sn = NULL;
ret_value = H5B_INS_REMOVE;
} else if(0 == idx) {
/*
* We are about to remove the left-most entry from the symbol table
* node but there are other entries to the right. No key values
* change.
*/
sn->nsyms -= 1;
sn_flags |= H5AC__DIRTIED_FLAG;
HDmemmove(sn->entry + idx, sn->entry + idx + 1,
(sn->nsyms-idx) * sizeof(H5G_entry_t));
ret_value = H5B_INS_NOOP;
} else if (idx + 1 == sn->nsyms) {
/*
* We are about to remove the right-most entry from the symbol table
* node but there are other entries to the left. The right key
* should be changed to reflect the new right-most entry.
*/
sn->nsyms -= 1;
sn_flags |= H5AC__DIRTIED_FLAG;
rt_key->offset = sn->entry[sn->nsyms - 1].name_off;
*rt_key_changed = TRUE;
ret_value = H5B_INS_NOOP;
} else {
/*
* We are about to remove an entry from the middle of a symbol table
* node.
*/
sn->nsyms -= 1;
sn_flags |= H5AC__DIRTIED_FLAG;
HDmemmove(sn->entry + idx, sn->entry + idx + 1,
(sn->nsyms - idx) * sizeof(H5G_entry_t));
ret_value = H5B_INS_NOOP;
} /* end else */
} /* end if */
/* Remove all entries from node, during B-tree deletion */
else {
H5O_loc_t tmp_oloc; /* Temporary object location */
/* Build temporary object location */
tmp_oloc.file = f;
/* Reduce the link count for all entries in this node */
for(idx = 0; idx < sn->nsyms; idx++) {
if(!(H5G_CACHED_SLINK == sn->entry[idx].type)) {
/* Decrement the reference count */
HDassert(H5F_addr_defined(sn->entry[idx].header));
tmp_oloc.addr = sn->entry[idx].header;
if(H5O_link(&tmp_oloc, -1, dxpl_id) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, H5B_INS_ERROR, "unable to decrement object link count")
} /* end if */
} /* end for */
/*
* We are about to remove all the symbols in this node. Copy the left
* key to the right key and mark the right key as dirty. Free this
* node and indicate that the pointer to this node in the B-tree
* should be removed also.
*/
*rt_key = *lt_key;
*rt_key_changed = TRUE;
sn->nsyms = 0;
if(H5MF_xfree(f, H5FD_MEM_BTREE, dxpl_id, addr, (hsize_t)H5G_node_size_real(f)) < 0
|| H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__DIRTIED_FLAG | H5C__DELETED_FLAG) < 0) {
sn = NULL;
HGOTO_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to free symbol table node")
} /* end if */
sn = NULL;
ret_value = H5B_INS_REMOVE;
} /* end else */
done:
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, sn_flags) < 0)
HDONE_ERROR(H5E_SYM, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release symbol table node")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_remove() */
/*-------------------------------------------------------------------------
* Function: H5G_node_iterate
*
* Purpose: This function gets called during a group iterate operation.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Jun 24 1997
*
*-------------------------------------------------------------------------
*/
int
H5G_node_iterate(H5F_t *f, hid_t dxpl_id, const void UNUSED *_lt_key, haddr_t addr,
const void UNUSED *_rt_key, void *_udata)
{
H5G_bt_it_it_t *udata = (H5G_bt_it_it_t *)_udata;
H5G_node_t *sn = NULL;
H5G_entry_t *ents; /* Pointer to entries in this node */
unsigned u; /* Local index variable */
int ret_value = H5_ITER_CONT;
FUNC_ENTER_NOAPI(H5G_node_iterate, H5_ITER_ERROR)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(udata && udata->heap);
/* Protect the symbol table node & local heap while we iterate over entries */
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
/*
* Iterate over the symbol table node entries.
*/
for(u = 0, ents = sn->entry; u < sn->nsyms && ret_value == H5_ITER_CONT; u++) {
if(udata->skip > 0)
--udata->skip;
else {
H5O_link_t lnk; /* Link for entry */
const char *name; /* Pointer to link name in heap */
/* Get the pointer to the name of the link in the heap */
name = H5HL_offset_into(udata->heap, ents[u].name_off);
HDassert(name);
/* Convert the entry to a link */
if(H5G_ent_to_link(&lnk, udata->heap, &ents[u], name) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, H5_ITER_ERROR, "unable to convert symbol table entry to link")
/* Make the callback */
ret_value = (udata->op)(&lnk, udata->op_data);
/* Release memory for link object */
if(H5O_msg_reset(H5O_LINK_ID, &lnk) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTFREE, H5_ITER_ERROR, "unable to release link message")
} /* end else */
/* Increment the number of entries passed through */
/* (whether we skipped them or not) */
if(udata->final_ent)
(*udata->final_ent)++;
} /* end for */
if(ret_value < 0)
HERROR(H5E_SYM, H5E_CANTNEXT, "iteration operator failed");
done:
/* Release resources */
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_iterate() */
/*-------------------------------------------------------------------------
* Function: H5G_node_sumup
*
* Purpose: This function gets called during a group iterate operation
* to return total number of members in the group.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Raymond Lu
* Nov 20, 2002
*
*-------------------------------------------------------------------------
*/
int
H5G_node_sumup(H5F_t *f, hid_t dxpl_id, const void UNUSED *_lt_key, haddr_t addr,
const void UNUSED *_rt_key, void *_udata)
{
hsize_t *num_objs = (hsize_t *)_udata;
H5G_node_t *sn = NULL;
int ret_value = H5_ITER_CONT;
FUNC_ENTER_NOAPI(H5G_node_sumup, H5_ITER_ERROR)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(num_objs);
/* Find the object node and add the number of symbol entries. */
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
*num_objs += sn->nsyms;
done:
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_sumup() */
/*-------------------------------------------------------------------------
* Function: H5G_node_name
*
* Purpose: This function gets called during a group iterate operation
* to return object name by giving idx.
*
* Return: 0 if object isn't found in this node; 1 if object is found;
* Negative on failure
*
* Programmer: Raymond Lu
* Nov 20, 2002
*
*-------------------------------------------------------------------------
*/
int
H5G_node_by_idx(H5F_t *f, hid_t dxpl_id, const void UNUSED *_lt_key, haddr_t addr,
const void UNUSED *_rt_key, void *_udata)
{
H5G_bt_it_idx_common_t *udata = (H5G_bt_it_idx_common_t *)_udata;
H5G_node_t *sn = NULL;
int ret_value = H5_ITER_CONT;
FUNC_ENTER_NOAPI(H5G_node_by_idx, H5_ITER_ERROR)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(udata);
/* Get a pointer to the symbol table node */
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node");
/* Find the node, locate the object symbol table entry and retrieve the name */
if(udata->idx >= udata->num_objs && udata->idx < (udata->num_objs + sn->nsyms)) {
hsize_t ent_idx; /* Entry index in this node */
/* Compute index of entry */
ent_idx = udata->idx - udata->num_objs;
/* Call 'by index' callback */
HDassert(udata->op);
if((udata->op)(&sn->entry[ent_idx], udata) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "'by index' callback failed")
/* Indicate that we found the entry we are interested in */
ret_value = H5_ITER_STOP;
} /* end if */
else
udata->num_objs += sn->nsyms;
done:
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_by_idx() */
/*-------------------------------------------------------------------------
* Function: H5G_node_init
*
* Purpose: This function gets called during a file opening to initialize
* global information about group B-tree nodes for file.
*
* Return: Non-negative on success
* Negative on failure
*
* Programmer: Quincey Koziol
* Jul 5, 2004
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_node_init(H5F_t *f)
{
H5B_shared_t *shared; /* Shared B-tree node info */
size_t sizeof_rkey; /* Size of raw (disk) key */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_node_init, FAIL)
/* Check arguments. */
HDassert(f);
/* Set the raw key size */
sizeof_rkey = H5F_SIZEOF_SIZE(f); /*name offset */
/* Allocate & initialize global info for the shared structure */
if(NULL == (shared = H5B_shared_new(f, H5B_SNODE, sizeof_rkey)))
HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed for shared B-tree info")
/* Set up the "local" information for this file's groups */
/* <none> */
/* Make shared B-tree info reference counted */
if(NULL == (f->shared->grp_btree_shared = H5RC_create(shared, H5B_shared_free)))
HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create ref-count wrapper for shared B-tree info")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_init() */
/*-------------------------------------------------------------------------
* Function: H5G_node_close
*
* Purpose: This function gets called during a file close to shutdown
* global information about group B-tree nodes for file.
*
* Return: Non-negative on success
* Negative on failure
*
* Programmer: Quincey Koziol
* Jul 5, 2004
*
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_node_close(const H5F_t *f)
{
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_node_close)
/* Check arguments. */
HDassert(f);
/* Free the raw B-tree node buffer */
if(H5F_GRP_BTREE_SHARED(f))
H5RC_DEC(H5F_GRP_BTREE_SHARED(f));
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_node_close */
/*-------------------------------------------------------------------------
* Function: H5G_node_copy
*
* Purpose: This function gets called during a group iterate operation
* to copy objects of this node into a new location.
*
* Return: 0(zero) on success/Negative on failure
*
* Programmer: Peter Cao
* Sept 10, 2005
*
*-------------------------------------------------------------------------
*/
int
H5G_node_copy(H5F_t *f, hid_t dxpl_id, const void UNUSED *_lt_key, haddr_t addr,
const void UNUSED *_rt_key, void *_udata)
{
H5G_bt_it_cpy_t *udata = (H5G_bt_it_cpy_t *)_udata;
const H5O_loc_t *src_oloc = udata->src_oloc;
H5O_copy_t *cpy_info = udata->cpy_info;
H5HL_t *heap = NULL;
H5G_node_t *sn = NULL;
unsigned int i; /* Local index variable */
int ret_value = H5_ITER_CONT;
FUNC_ENTER_NOAPI(H5G_node_copy, H5_ITER_ERROR)
/* Check arguments. */
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(udata);
/* load the symbol table into memory from the source file */
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
/* get the base address of the heap */
if(NULL == (heap = H5HL_protect(f, dxpl_id, udata->src_heap_addr, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5_ITER_ERROR, "unable to protect symbol name")
/* copy object in this node one by one */
for(i = 0; i < sn->nsyms; i++) {
H5G_entry_t *src_ent = &(sn->entry[i]); /* Convenience variable to refer to current source group entry */
H5O_link_t lnk; /* Link to insert */
const char *name; /* Name of source object */
H5G_entry_t tmp_src_ent; /* Temperary copy. Change will not affect the cache */
/* expand soft link */
if(H5G_CACHED_SLINK == src_ent->type && cpy_info->expand_soft_link) {
H5O_info_t oinfo; /* Information about object pointed to by soft link */
H5G_loc_t grp_loc; /* Group location holding soft link */
H5G_name_t grp_path; /* Path for group holding soft link */
char *link_name; /* Pointer to value of soft link */
/* Make a temporary copy, so that it will not change the info in the cache */
HDmemcpy(&tmp_src_ent, src_ent, sizeof(H5G_entry_t));
/* Set up group location for soft link to start in */
H5G_name_reset(&grp_path);
grp_loc.path = &grp_path;
grp_loc.oloc = (H5O_loc_t *)src_oloc;
/* Get pointer to link value in local heap */
link_name = (char *)H5HL_offset_into(heap, tmp_src_ent.cache.slink.lval_offset);
/* Check if the object pointed by the soft link exists in the source file */
if(H5G_loc_info(&grp_loc, link_name, FALSE, &oinfo, H5P_DEFAULT, dxpl_id) >= 0) {
tmp_src_ent.header = oinfo.addr;
src_ent = &tmp_src_ent;
} /* end if */
else
H5E_clear_stack(NULL); /* discard any errors from a dangling soft link */
} /* if ((H5G_CACHED_SLINK == src_ent->type)... */
/* Check if object in source group is a hard link */
if(H5F_addr_defined(src_ent->header)) {
H5O_loc_t new_dst_oloc; /* Copied object location in destination */
H5O_loc_t tmp_src_oloc; /* Temporary object location for source object */
/* Set up copied object location to fill in */
H5O_loc_reset(&new_dst_oloc);
new_dst_oloc.file = udata->dst_file;
/* Build temporary object location for source */
H5O_loc_reset(&tmp_src_oloc);
tmp_src_oloc.file = f;
tmp_src_oloc.addr = src_ent->header;
/* Copy the shared object from source to destination */
if(H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, dxpl_id, cpy_info, TRUE) < 0)
HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy object")
/* Construct link information for eventual insertion */
lnk.type = H5L_TYPE_HARD;
lnk.u.hard.addr = new_dst_oloc.addr;
} /* ( H5F_addr_defined(src_ent->header)) */
else if(H5G_CACHED_SLINK == src_ent->type) {
/* it is a soft link */
/* Construct link information for eventual insertion */
lnk.type = H5L_TYPE_SOFT;
lnk.u.soft.name = H5HL_offset_into(heap, src_ent->cache.slink.lval_offset);
} /* else if */
else
HDassert(0 && "Unknown entry type");
/* Set up common link data */
lnk.cset = H5F_DEFAULT_CSET; /* XXX: Allow user to set this */
lnk.corder = 0; /* Creation order is not tracked for old-style links */
lnk.corder_valid = FALSE; /* Creation order is not valid */
/* lnk.name = name; */ /* This will be set in callback */
/* Determine name of source object */
name = H5HL_offset_into(heap, src_ent->name_off);
HDassert(name);
/* Insert the new object in the destination file's group */
/* (Don't increment the link count - that's already done above for hard links) */
if(H5G_stab_insert_real(udata->dst_file, udata->dst_stab, name, &lnk, dxpl_id) < 0)
HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "unable to insert the name")
} /* end of for (i=0; i<sn->nsyms; i++) */
done:
if(heap && H5HL_unprotect(heap) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to unprotect symbol name")
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_copy() */
/*-------------------------------------------------------------------------
* Function: H5G_node_build_table
*
* Purpose: B-link tree callback for building table of links
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* koziol@hdfgroup.org
* Nov 19 2006
*
*-------------------------------------------------------------------------
*/
int
H5G_node_build_table(H5F_t *f, hid_t dxpl_id, const void UNUSED *_lt_key, haddr_t addr,
const void UNUSED *_rt_key, void *_udata)
{
H5G_bt_it_bt_t *udata = (H5G_bt_it_bt_t *)_udata;
H5G_node_t *sn = NULL; /* Symbol table node */
unsigned u; /* Local index variable */
int ret_value = H5_ITER_CONT;
FUNC_ENTER_NOAPI(H5G_node_build_table, H5_ITER_ERROR)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(udata && udata->heap);
/*
* Save information about the symbol table node since we can't lock it
* because we're about to call an application function.
*/
if(NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
/* Check if the link table needs to be extended */
if((udata->ltable->nlinks + sn->nsyms) >= udata->alloc_nlinks) {
size_t na = MAX((udata->ltable->nlinks + sn->nsyms), (udata->alloc_nlinks * 2)); /* Double # of links allocated */
H5O_link_t *x; /* Pointer to larger array of links */
/* Re-allocate the link table */
if((x = H5MM_realloc(udata->ltable->lnks, sizeof(H5O_link_t) * na)) == NULL)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed")
udata->ltable->lnks = x;
} /* end if */
/* Iterate over the symbol table node entries, adding to link table */
for(u = 0; u < sn->nsyms; u++) {
const char *name; /* Pointer to link name in heap */
unsigned linkno; /* Link allocated */
/* Get pointer to link's name in the heap */
name = H5HL_offset_into(udata->heap, sn->entry[u].name_off);
HDassert(name);
/* Determine the link to operate on in the table */
linkno = udata->ltable->nlinks++;
/* Convert the entry to a link */
if(H5G_ent_to_link(&udata->ltable->lnks[linkno], udata->heap, &sn->entry[u], name) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, H5_ITER_ERROR, "unable to convert symbol table entry to link")
} /* end for */
done:
/* Release the locked items */
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_build_table() */
/*-------------------------------------------------------------------------
* Function: H5G_node_iterate_size
*
* Purpose: This function gets called by H5B_iterate_btree_size()
* to gather storage info for SNODs.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Vailin Choi
* Jun 19 2007
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_node_iterate_size(H5F_t *f, hid_t UNUSED dxpl_id, const void UNUSED *_lt_key, haddr_t UNUSED addr,
const void UNUSED *_rt_key, void *_udata)
{
hsize_t *stab_size = (hsize_t *)_udata; /* User data */
FUNC_ENTER_NOAPI_NOFUNC(H5G_node_iterate_size)
/* Check arguments */
HDassert(f);
HDassert(stab_size);
*stab_size += H5G_node_size_real(f);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5G_btree_node_iterate() */
/*-------------------------------------------------------------------------
* Function: H5G_node_debug
*
* Purpose: Prints debugging information about a symbol table node
* or a B-tree node for a symbol table B-tree.
*
* Return: 0(zero) on success/Negative on failure
*
* Programmer: Robb Matzke
* matzke@llnl.gov
* Aug 4 1997
*
*-------------------------------------------------------------------------
*/
herr_t
H5G_node_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
int fwidth, haddr_t heap_addr)
{
H5G_node_t *sn = NULL;
H5HL_t *heap = NULL;
unsigned u; /* Local index variable */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5G_node_debug, FAIL)
/*
* Check arguments.
*/
HDassert(f);
HDassert(H5F_addr_defined(addr));
HDassert(stream);
HDassert(indent >= 0);
HDassert(fwidth >= 0);
/* Pin the heap down in memory */
if(heap_addr > 0 && H5F_addr_defined(heap_addr))
if(NULL == (heap = H5HL_protect(f, dxpl_id, heap_addr, H5AC_READ)))
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to protect symbol table heap")
/*
* If we couldn't load the symbol table node, then try loading the
* B-tree node.
*/
if (NULL == (sn = H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, NULL, NULL, H5AC_READ))) {
H5G_bt_common_t udata; /*data to pass through B-tree */
H5E_clear_stack(NULL); /* discard that error */
udata.heap = heap;
if(H5B_debug(f, dxpl_id, addr, stream, indent, fwidth, H5B_SNODE, &udata) < 0)
HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to debug B-tree node");
} /* end if */
else {
fprintf(stream, "%*sSymbol Table Node...\n", indent, "");
fprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
"Dirty:",
sn->cache_info.is_dirty ? "Yes" : "No");
fprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
"Size of Node (in bytes):", (unsigned)H5G_node_size_real(f));
fprintf(stream, "%*s%-*s %u of %u\n", indent, "", fwidth,
"Number of Symbols:",
sn->nsyms, (unsigned)(2 * H5F_SYM_LEAF_K(f)));
indent += 3;
fwidth = MAX(0, fwidth - 3);
for(u = 0; u < sn->nsyms; u++) {
fprintf(stream, "%*sSymbol %u:\n", indent - 3, "", u);
if(heap) {
const char *s = H5HL_offset_into(heap, sn->entry[u].name_off);
if(s)
fprintf(stream, "%*s%-*s `%s'\n", indent, "", fwidth, "Name:", s);
} /* end if */
else
fprintf(stream, "%*s%-*s\n", indent, "", fwidth, "Warning: Invalid heap address given, name not displayed!");
H5G_ent_debug(sn->entry + u, stream, indent, fwidth, heap);
} /* end for */
} /* end if */
done:
if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to release symbol table node")
if(heap && H5HL_unprotect(heap) < 0)
HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5G_node_debug() */
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