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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: swmr_common.c
*
* Purpose: Utility functions for the SWMR test code.
*
*-------------------------------------------------------------------------
*/
/***********/
/* Headers */
/***********/
#include <assert.h>
#include "swmr_common.h"
/*******************/
/* Local Variables */
/*******************/
/* The SWMR data arrays:
*
* The code uses a 2-D jagged array of datasets. The first dimension is called
* the 'level' and there are five of them.
*
* #define NLEVELS 5
*
* The second dimension is the 'count' and there are quite a few datasets per
* 'level'.
*
* unsigned symbol_count[NLEVELS] = {100, 200, 400, 800, 1600};
*
* These datasets are created when the skeleton is generated and are initially
* empty. Each dataset has no upper bound on size (H5S_UNLIMITED). They
* are of compound type, with two members: an integer ID and an opaque
* 'data part'. The data part is not used by the SWMR testing.
*
* The SWMR testing will then randomly add and/or remove entries
* from these datasets. The selection of the level is skewed by a mapping
* table which preferentially hammers on the lower levels with their smaller
* number of datasets.
*
* static unsigned symbol_mapping[NMAPPING] = {0, 0, 0, 0, 1, 1, 2, 3, 4};
*
* The information about each dataset (name, hid_t, etc.) is stored in a
* separate array.
*
* symbol_info_t *symbol_info[NLEVELS];
*/
/* An array of dataset levels, used to select the level for a SWMR operation
* Note that this preferentially selects the lower levels with their smaller
* number of datasets.
*/
static unsigned symbol_mapping[NMAPPING] = {0, 0, 0, 0, 1, 1, 2, 3, 4};
/* The number of datasets at each level */
unsigned symbol_count[NLEVELS] = {100, 200, 400, 800, 1600};
/* Array of dataset information entries (1 per dataset) */
symbol_info_t *symbol_info[NLEVELS];
/*-------------------------------------------------------------------------
* Function: choose_dataset
*
* Purpose: Selects a random dataset in the SWMR file
*
* Parameters: N/A
*
* Return: Success: A pointer to information about a dataset.
* Failure: Can't fail
*
*-------------------------------------------------------------------------
*/
symbol_info_t *
choose_dataset(void)
{
unsigned level; /* The level of the dataset */
unsigned offset; /* The "offset" of the dataset at that level */
/* Determine level of dataset */
level = symbol_mapping[random() % NMAPPING];
/* Determine the offset of the level */
offset = random() % symbol_count[level];
return &symbol_info[level][offset];
} /* end choose_dataset() */
/*-------------------------------------------------------------------------
* Function: create_symbol_datatype
*
* Purpose: Create's the HDF5 datatype used for elements in the SWMR
* testing datasets.
*
* Parameters: N/A
*
* Return: Success: An HDF5 type ID
* Failure: -1
*
*-------------------------------------------------------------------------
*/
hid_t
create_symbol_datatype(void)
{
hid_t sym_type_id; /* Datatype ID for symbol */
hid_t opaq_type_id; /* Datatype ID for opaque part of record */
/* Create opaque datatype to represent other information for this record */
if((opaq_type_id = H5Tcreate(H5T_OPAQUE, DTYPE_SIZE)) < 0)
return -1;
/* Create compound datatype for symbol */
if((sym_type_id = H5Tcreate(H5T_COMPOUND, sizeof(symbol_t))) < 0)
return -1;
/* Insert fields in symbol datatype */
if(H5Tinsert(sym_type_id, "rec_id", HOFFSET(symbol_t, rec_id), H5T_NATIVE_UINT64) < 0)
return -1;
if(H5Tinsert(sym_type_id, "info", HOFFSET(symbol_t, info), opaq_type_id) < 0)
return -1;
/* Close opaque datatype */
if(H5Tclose(opaq_type_id) < 0)
return -1;
return sym_type_id;
} /* end create_symbol_datatype() */
/*-------------------------------------------------------------------------
* Function: generate_name
*
* Purpose: Generates a SWMR testing dataset name given a level and
* count.
* The name is in the format <name>-<level> (%u-%04u).
*
* Parameters: char *name_buf
* Buffer for the created name. Must be pre-allocated.
* Since the name is formulaic, this isn't considered an issue.
*
* unsigned level
* The dataset's level
*
* unsigned count
* The dataset's count
*
* Return: Success: 0
*
* Failure: Can't fail
*
*-------------------------------------------------------------------------
*/
int
generate_name(char *name_buf, unsigned level, unsigned count)
{
assert(name_buf);
sprintf(name_buf, "%u-%04u", level, count);
return 0;
} /* end generate_name() */
/*-------------------------------------------------------------------------
* Function: generate_symbols
*
* Purpose: Initializes the global dataset infomration arrays.
*
* Parameters: N/A
*
* Return: Success: 0
* Failure: Can't fail
*
*-------------------------------------------------------------------------
*/
int
generate_symbols(void)
{
unsigned u, v; /* Local index variables */
for(u = 0; u < NLEVELS; u++) {
symbol_info[u] = (symbol_info_t *)malloc(symbol_count[u] * sizeof(symbol_info_t));
for(v = 0; v < symbol_count[u]; v++) {
char name_buf[64];
generate_name(name_buf, u, v);
symbol_info[u][v].name = (char *)malloc(strlen(name_buf) + 1);
strcpy(symbol_info[u][v].name, name_buf);
symbol_info[u][v].dsid = -1;
symbol_info[u][v].nrecords = 0;
} /* end for */
} /* end for */
return 0;
} /* end generate_symbols() */
/*-------------------------------------------------------------------------
* Function: shutdown_symbols
*
* Purpose: Cleans up the global dataset information arrays.
*
* Parameters: N/A
*
* Return: Success: 0
* Failure: Can't fail
*
*-------------------------------------------------------------------------
*/
int
shutdown_symbols(void)
{
unsigned u, v; /* Local index variables */
/* Clean up the symbols */
for(u = 0; u < NLEVELS; u++) {
for(v = 0; v < symbol_count[u]; v++)
free(symbol_info[u][v].name);
free(symbol_info[u]);
} /* end for */
return 0;
} /* end shutdown_symbols() */
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