118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#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;
|
|
}
|
|
|