/* Copyright 2012, Sebastian Reichel <sre@ring0.de>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

public class PluginLoader<T> : Object {

	public string path { get; private set; }

	private Type type;
	private Module module;

	private delegate Type RegisterPluginFunction(Module module);

	public PluginLoader(string path) {
		assert(Module.supported());
		this.path = path;
	}

	public bool load() {
		module = Module.open(path, ModuleFlags.BIND_LAZY);
		if(module == null) {
			return false;
		}

		module.make_resident();

		void* function;
		module.symbol("register_plugin", out function);

		type = ((RegisterPluginFunction) function)(module);
	log("PluginLoader", LogLevelFlags.LEVEL_INFO, "loadedplugin: %s".printf(type.name()));
		return true;
	}

	public T new_object() {
		return Object.new (type);
	}
}