dbpool_sqlite3.c

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/* ==================================================================== 
 * The Kannel Software License, Version 1.0 
 * 
 * Copyright (c) 2001-2008 Kannel Group  
 * Copyright (c) 1998-2001 WapIT Ltd.   
 * All rights reserved. 
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 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
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 *    distribution. 
 * 
 * 3. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowledgment: 
 *       "This product includes software developed by the 
 *        Kannel Group (http://www.kannel.org/)." 
 *    Alternately, this acknowledgment may appear in the software itself, 
 *    if and wherever such third-party acknowledgments normally appear. 
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 * 5. Products derived from this software may not be called "Kannel", 
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 
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 * ==================================================================== 
 * 
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Kannel Group.  For more information on  
 * the Kannel Group, please see <http://www.kannel.org/>. 
 * 
 * Portions of this software are based upon software originally written at  
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 */ 

/*
 * dbpool_sqlite3.c - implement SQLite3 operations for generic database connection pool
 *
 * Stipe Tolj <st@tolj.org>
 */

#ifdef HAVE_SQLITE3
#include <sqlite3.h>

static void *sqlite3_open_conn(const DBConf *db_conf)
{
    sqlite3 *db = NULL;
    SQLite3Conf *conf = db_conf->sqlite3; /* make compiler happy */

    /* sanity check */
    if (conf == NULL)
        return NULL;

    if (sqlite3_open(octstr_get_cstr(conf->file), &db) != SQLITE_OK) {
        error(0, "SQLite3: can not open or create database file `%s'!", 
              octstr_get_cstr(conf->file));
        error(0, "SQLite3: %s", sqlite3_errmsg(db));
        sqlite3_close(db);
        goto failed;
    }

    info(0, "SQLite3: Opened or created database file `%s'.", octstr_get_cstr(conf->file));
    info(0, "SQLite3: library version %s.", sqlite3_version);

    return db;

failed:
    return NULL;
}


static void sqlite3_close_conn(void *conn)
{
    int rc;
    if (conn == NULL)
        return;

    /* in case we are busy, loop until we can close */
    do {
        rc = sqlite3_close((sqlite3*) conn);
    } while (rc == SQLITE_BUSY);
    
    if (rc == SQLITE_ERROR) {
        error(0, "SQLite3: error while closing database file.");
    }
}


static int sqlite3_check_conn(void *conn)
{
    if (conn == NULL)
        return -1;

    /* There is no such construct in SQLite3,
     * so return a valid connection indication */
    return 0;
}


static void sqlite3_conf_destroy(DBConf *db_conf)
{
    SQLite3Conf *conf = db_conf->sqlite3;

    octstr_destroy(conf->file);

    gw_free(conf);
    gw_free(db_conf);
}


static struct db_ops sqlite3_ops = {
    .open = sqlite3_open_conn,
    .close = sqlite3_close_conn,
    .check = sqlite3_check_conn,
    .conf_destroy = sqlite3_conf_destroy
};

#endif /* HAVE_SQLITE3 */

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