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Annotation of embedaddon/strongswan/src/libstrongswan/database/database_factory.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2008 Martin Willi
                      3:  * HSR Hochschule fuer Technik Rapperswil
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify it
                      6:  * under the terms of the GNU General Public License as published by the
                      7:  * Free Software Foundation; either version 2 of the License, or (at your
                      8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful, but
                     11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
                     13:  * for more details.
                     14:  */
                     15: 
                     16: #include "database_factory.h"
                     17: 
                     18: #include <collections/linked_list.h>
                     19: #include <threading/mutex.h>
                     20: 
                     21: typedef struct private_database_factory_t private_database_factory_t;
                     22: 
                     23: /**
                     24:  * private data of database_factory
                     25:  */
                     26: struct private_database_factory_t {
                     27: 
                     28:        /**
                     29:         * public functions
                     30:         */
                     31:        database_factory_t public;
                     32: 
                     33:        /**
                     34:         * list of registered database_t implementations
                     35:         */
                     36:        linked_list_t *databases;
                     37: 
                     38:        /**
                     39:         * mutex to lock access to databases
                     40:         */
                     41:        mutex_t *mutex;
                     42: };
                     43: 
                     44: METHOD(database_factory_t, create, database_t*,
                     45:        private_database_factory_t *this, char *uri)
                     46: {
                     47:        enumerator_t *enumerator;
                     48:        database_t *database = NULL;
                     49:        database_constructor_t create;
                     50: 
                     51:        this->mutex->lock(this->mutex);
                     52:        enumerator = this->databases->create_enumerator(this->databases);
                     53:        while (enumerator->enumerate(enumerator, &create))
                     54:        {
                     55:                database = create(uri);
                     56:                if (database)
                     57:                {
                     58:                        break;
                     59:                }
                     60:        }
                     61:        enumerator->destroy(enumerator);
                     62:        this->mutex->unlock(this->mutex);
                     63:        return database;
                     64: }
                     65: 
                     66: METHOD(database_factory_t, add_database, void,
                     67:        private_database_factory_t *this, database_constructor_t create)
                     68: {
                     69:        this->mutex->lock(this->mutex);
                     70:        this->databases->insert_last(this->databases, create);
                     71:        this->mutex->unlock(this->mutex);
                     72: }
                     73: 
                     74: METHOD(database_factory_t, remove_database, void,
                     75:        private_database_factory_t *this, database_constructor_t create)
                     76: {
                     77:        this->mutex->lock(this->mutex);
                     78:        this->databases->remove(this->databases, create, NULL);
                     79:        this->mutex->unlock(this->mutex);
                     80: }
                     81: 
                     82: METHOD(database_factory_t, destroy, void,
                     83:        private_database_factory_t *this)
                     84: {
                     85:        this->databases->destroy(this->databases);
                     86:        this->mutex->destroy(this->mutex);
                     87:        free(this);
                     88: }
                     89: 
                     90: /*
                     91:  * see header file
                     92:  */
                     93: database_factory_t *database_factory_create()
                     94: {
                     95:        private_database_factory_t *this;
                     96: 
                     97:        INIT(this,
                     98:                .public = {
                     99:                        .create = _create,
                    100:                        .add_database = _add_database,
                    101:                        .remove_database = _remove_database,
                    102:                        .destroy = _destroy,
                    103:                },
                    104:                .databases = linked_list_create(),
                    105:                .mutex = mutex_create(MUTEX_TYPE_DEFAULT),
                    106:        );
                    107: 
                    108:        return &this->public;
                    109: }
                    110: