merged the modularization branch (credentials) back to trunk

src/libstrongswan/database/database_factory.c

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2008 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * $Id$
+ */
+
+#include "database_factory.h"
+
+#include <utils/linked_list.h>
+#include <utils/mutex.h>
+
+typedef struct private_database_factory_t private_database_factory_t;
+
+/**
+ * private data of database_factory
+ */
+struct private_database_factory_t {
+
+	/**
+	 * public functions
+	 */
+	database_factory_t public;
+	
+	/**
+	 * list of registered database_t implementations
+	 */
+	linked_list_t *databases;
+	
+	/**
+	 * mutex to lock access to databases
+	 */
+	mutex_t *mutex;
+};
+
+/**
+ * Implementation of database_factory_t.create.
+ */
+static database_t* create(private_database_factory_t *this, char *uri)
+{
+	enumerator_t *enumerator;
+	database_t *database = NULL;
+	database_constructor_t create;
+	
+	this->mutex->lock(this->mutex);
+	enumerator = this->databases->create_enumerator(this->databases);
+	while (enumerator->enumerate(enumerator, &create))
+	{
+		database = create(uri);
+		if (database)
+		{
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->mutex->unlock(this->mutex);
+	return database;
+}
+
+/**
+ * Implementation of database_factory_t.add_database.
+ */
+static void add_database(private_database_factory_t *this,
+						 database_constructor_t create)
+{
+	this->mutex->lock(this->mutex);
+	this->databases->insert_last(this->databases, create);
+	this->mutex->unlock(this->mutex);
+}
+
+/**
+ * Implementation of database_factory_t.remove_database.
+ */
+static void remove_database(private_database_factory_t *this,
+							database_constructor_t create)
+{
+	this->mutex->lock(this->mutex);
+	this->databases->remove(this->databases, create, NULL);
+	this->mutex->unlock(this->mutex);
+}
+
+/**
+ * Implementation of database_factory_t.destroy
+ */
+static void destroy(private_database_factory_t *this)
+{
+	this->databases->destroy(this->databases);
+	this->mutex->destroy(this->mutex);
+	free(this);
+}
+
+/*
+ * see header file
+ */
+database_factory_t *database_factory_create()
+{
+	private_database_factory_t *this = malloc_thing(private_database_factory_t);
+	
+	this->public.create = (database_t*(*)(database_factory_t*, char *url))create;
+	this->public.add_database = (void(*)(database_factory_t*, database_constructor_t))add_database;
+	this->public.remove_database = (void(*)(database_factory_t*, database_constructor_t))remove_database;
+	this->public.destroy = (void(*)(database_factory_t*))destroy;
+	
+	this->databases = linked_list_create();
+	this->mutex = mutex_create(MUTEX_DEFAULT);
+	
+	return &this->public;
+}
+