| /* Generic signalling/notification infrastructure */ |
| /* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * All Rights Reserved |
| * |
| * 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. |
| * |
| * 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., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| #include <osmocore/signal.h> |
| #include <osmocore/talloc.h> |
| #include <osmocore/linuxlist.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| void *tall_sigh_ctx; |
| static LLIST_HEAD(signal_handler_list); |
| |
| struct signal_handler { |
| struct llist_head entry; |
| unsigned int subsys; |
| signal_cbfn *cbfn; |
| void *data; |
| }; |
| |
| |
| int register_signal_handler(unsigned int subsys, signal_cbfn *cbfn, void *data) |
| { |
| struct signal_handler *sig_data; |
| |
| sig_data = talloc(tall_sigh_ctx, struct signal_handler); |
| if (!sig_data) |
| return -ENOMEM; |
| |
| memset(sig_data, 0, sizeof(*sig_data)); |
| |
| sig_data->subsys = subsys; |
| sig_data->data = data; |
| sig_data->cbfn = cbfn; |
| |
| /* FIXME: check if we already have a handler for this subsys/cbfn/data */ |
| |
| llist_add_tail(&sig_data->entry, &signal_handler_list); |
| |
| return 0; |
| } |
| |
| void unregister_signal_handler(unsigned int subsys, signal_cbfn *cbfn, void *data) |
| { |
| struct signal_handler *handler; |
| |
| llist_for_each_entry(handler, &signal_handler_list, entry) { |
| if (handler->cbfn == cbfn && handler->data == data |
| && subsys == handler->subsys) { |
| llist_del(&handler->entry); |
| talloc_free(handler); |
| break; |
| } |
| } |
| } |
| |
| |
| void dispatch_signal(unsigned int subsys, unsigned int signal, void *signal_data) |
| { |
| struct signal_handler *handler; |
| |
| llist_for_each_entry(handler, &signal_handler_list, entry) { |
| if (handler->subsys != subsys) |
| continue; |
| (*handler->cbfn)(subsys, signal, handler->data, signal_data); |
| } |
| } |