| /* |
| * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. |
| * |
| * 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 any later version. |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER ); |
| |
| #include <gpxe/interface.h> |
| |
| /** @file |
| * |
| * Object communication interfaces |
| * |
| */ |
| |
| /** |
| * Plug an interface into a new destination interface |
| * |
| * @v intf Interface |
| * @v dest New destination interface |
| * |
| * The reference to the existing destination interface is dropped, a |
| * reference to the new destination interface is obtained, and the |
| * interface is updated to point to the new destination interface. |
| * |
| * Note that there is no "unplug" call; instead you must plug the |
| * interface into a null interface. |
| */ |
| void plug ( struct interface *intf, struct interface *dest ) { |
| DBGC ( intf, "INTF %p moving from INTF %p to INTF %p\n", |
| intf, intf->dest, dest ); |
| intf_put ( intf->dest ); |
| intf->dest = intf_get ( dest ); |
| } |
| |
| /** |
| * Plug two interfaces together |
| * |
| * @v a Interface A |
| * @v b Interface B |
| * |
| * Plugs interface A into interface B, and interface B into interface |
| * A. (The basic plug() function is unidirectional; this function is |
| * merely a shorthand for two calls to plug(), hence the name.) |
| */ |
| void plug_plug ( struct interface *a, struct interface *b ) { |
| plug ( a, b ); |
| plug ( b, a ); |
| } |