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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/****************/
/* Module Setup */
/****************/
#define H5F_PACKAGE /*suppress error about including H5Fpkg */
#define H5SM_PACKAGE /*suppress error about including H5SMpkg */
#define H5SM_TESTING /*suppress warning about H5SM testing funcs*/
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5ACprivate.h" /* Metadata cache */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fpkg.h" /* File access */
#include "H5SMpkg.h" /* Shared object header messages */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5SM_get_refcount_bt2_cb
*
* Purpose: v2 B-tree 'find' callback to retrieve the record for a message
*
* Return: SUCCEED/FAIL
*
* Programmer: Quincey Koziol
* Tuesday, December 19, 2006
*
*-------------------------------------------------------------------------
*/
static herr_t
H5SM_get_refcount_bt2_cb(const void *_record, void *_op_data)
{
const H5SM_sohm_t *record = (const H5SM_sohm_t *)_record; /* v2 B-tree record for message */
H5SM_sohm_t *op_data = (H5SM_sohm_t *)_op_data; /* "op data" from v2 B-tree find */
FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5SM_get_refcount_bt2_cb)
/*
* Check arguments.
*/
HDassert(record);
HDassert(op_data);
/* Make a copy of the record */
*op_data = *record;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5SM_get_refcount_bt2_cb() */
/*-------------------------------------------------------------------------
* Function: H5SM_get_refcount_test
*
* Purpose: Retrieve the reference count for a message
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Tuesday, December 19, 2006
*
*-------------------------------------------------------------------------
*/
herr_t
H5SM_get_refcount_test(H5F_t *f, hid_t dxpl_id, unsigned type_id,
const H5O_shared_t *sh_mesg, hsize_t *ref_count)
{
H5HF_t *fheap = NULL; /* Fractal heap that contains shared messages */
H5SM_master_table_t *table = NULL; /* SOHM master table */
H5SM_list_t *list = NULL; /* SOHM index list for message type (if in list form) */
H5SM_index_header_t *header=NULL; /* Index header for message type */
H5SM_mesg_key_t key; /* Key for looking up message */
H5SM_fh_ud_gh_t udata; /* User data for fractal heap 'op' callback */
H5SM_sohm_t message; /* Record for shared message */
ssize_t index_num; /* Table index for message type */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT(H5SM_get_refcount_test)
/* Sanity check */
HDassert(f);
HDassert(sh_mesg);
HDassert(ref_count);
/* Look up the master SOHM table */
if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, f->shared->sohm_addr, NULL, NULL, H5AC_READ)))
HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
/* Find the correct index and try to delete from it */
if((index_num = H5SM_get_index(table, type_id)) < 0)
HGOTO_ERROR(H5E_SOHM, H5E_NOTFOUND, FAIL, "unable to find correct SOHM index")
header = &(table->indexes[index_num]);
/* Open the heap that this message is in */
if(NULL == (fheap = H5HF_open(f, dxpl_id, header->heap_addr)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
/* Prepare user data for callback */
udata.type_id = type_id;
/* Compute the hash value for the B-tree lookup */
if(H5HF_op(fheap, dxpl_id, &(sh_mesg->u.heap_id), H5SM_get_hash_fh_cb, &udata) < 0)
HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't access message in fractal heap")
/* Set up key for message to locate */
key.hash = udata.hash;
key.encoding = NULL;
key.encoding_size = 0;
key.fheap = fheap;
key.mesg_heap_id = sh_mesg->u.heap_id;
/* Try to find the message in the index */
if(header->index_type == H5SM_LIST) {
size_t list_pos; /* Position of the message in the list */
/* If the index is stored as a list, get it from the cache */
if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, NULL, header, H5AC_READ)))
HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM index")
/* Find the message in the list */
if((list_pos = H5SM_find_in_list(list, &key)) == UFAIL)
HGOTO_ERROR(H5E_SOHM, H5E_NOTFOUND, FAIL, "message not in index")
/* Copy the message */
message = list->messages[list_pos];
} /* end if */
else /* Index is a B-tree */
{
HDassert(header->index_type == H5SM_BTREE);
/* Look up the message in the v2 B-tree */
if(H5B2_find(f, dxpl_id, H5SM_INDEX, header->index_addr, &key, H5SM_get_refcount_bt2_cb, &message) < 0)
HGOTO_ERROR(H5E_SOHM, H5E_NOTFOUND, FAIL, "message not in index")
} /* end else */
/* Set the refcount for the message */
*ref_count = message.ref_count;
done:
/* Release resources */
if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_CACHE, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM index")
if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, f->shared->sohm_addr, table, H5AC__NO_FLAGS_SET) < 0)
HDONE_ERROR(H5E_CACHE, H5E_CANTRELEASE, FAIL, "unable to close SOHM master table")
if(fheap && H5HF_close(fheap, dxpl_id) < 0)
HDONE_ERROR(H5E_HEAP, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5SM_get_refcount_test() */
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