130 строки
4.0 KiB
C
130 строки
4.0 KiB
C
/*
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* Copyright (c) 2012-2013 Los Alamos National Security, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*
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* These symbols are in a file by themselves to provide nice linker
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* semantics. Since linkers generally pull in symbols by object
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* files, keeping these symbols as the only symbols in this file
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* prevents utility programs such as "ompi_info" from having to import
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* entire components just to query their version and parameters.
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*/
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#include "opal_config.h"
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#include "opal/constants.h"
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#include <sys/stat.h>
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#include "opal/mca/base/base.h"
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#include "opal/util/show_help.h"
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#include "opal/mca/db/db.h"
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#include "opal/mca/db/base/base.h"
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#include "db_sqlite.h"
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extern opal_db_base_module_t opal_db_sqlite_module;
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char *opal_db_sqlite_file;
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static int sqlite_component_register(void);
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static int sqlite_component_open(void);
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static int sqlite_component_close(void);
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static int sqlite_component_query(opal_db_base_module_t **module,
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int *store_priority,
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int *fetch_priority);
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static int sqlite_component_register(void);
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/*
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* Instantiate the public struct with all of our public information
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* and pointers to our public functions in it
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*/
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opal_db_sqlite_component_t mca_db_sqlite_component = {
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{
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{
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OPAL_DB_BASE_VERSION_1_0_0,
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/* Component name and version */
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"sqlite",
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OPAL_MAJOR_VERSION,
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OPAL_MINOR_VERSION,
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OPAL_RELEASE_VERSION,
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/* Component open and close functions */
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sqlite_component_open,
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sqlite_component_close,
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NULL,
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sqlite_component_register
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},
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{
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/* The component is checkpoint ready */
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MCA_BASE_METADATA_PARAM_CHECKPOINT
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},
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sqlite_component_query
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}
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};
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static int sqlite_component_open(void)
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{
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return OPAL_SUCCESS;
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}
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/* this component is NEVER used for store or fetch */
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static int sqlite_component_query(opal_db_base_module_t **module,
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int *store_priority,
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int *fetch_priority)
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{
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struct stat buf;
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*store_priority = 0;
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*fetch_priority = 0;
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if (NULL != mca_db_sqlite_component.db_file) {
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/* if the database file doesn't exist, then we can't operate */
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if (0 != stat(mca_db_sqlite_component.db_file, &buf)) {
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/* not found */
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opal_show_help("help-db-sqlite.txt", "file-not-found",
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true, mca_db_sqlite_component.db_file);
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*module = NULL;
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return OPAL_ERROR;
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}
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*module = &opal_db_sqlite_module;
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return OPAL_SUCCESS;
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}
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*module = NULL;
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return OPAL_ERROR;
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}
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static int sqlite_component_close(void)
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{
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return OPAL_SUCCESS;
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}
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static int sqlite_component_register(void)
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{
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mca_base_component_t *c = &mca_db_sqlite_component.super.base_version;
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/* retrieve the name of the file to be used */
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mca_db_sqlite_component.db_file = NULL;
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(void) mca_base_component_var_register (c, "database", "Name of file to be used for database",
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MCA_BASE_VAR_TYPE_STRING, NULL, 0, 0,
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OPAL_INFO_LVL_9,
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MCA_BASE_VAR_SCOPE_READONLY,
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&mca_db_sqlite_component.db_file);
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/* retrieve the number of worker threads to be used, if sqlite3 is thread-safe */
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mca_db_sqlite_component.num_worker_threads = 0;
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(void) mca_base_component_var_register (c, "num_worker_threads", "Number of worker threads to be used",
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MCA_BASE_VAR_TYPE_STRING, NULL, 0, 0,
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OPAL_INFO_LVL_9,
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MCA_BASE_VAR_SCOPE_READONLY,
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&mca_db_sqlite_component.num_worker_threads);
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return OPAL_SUCCESS;
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}
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