81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* Generic signalling/notification infrastructure */
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/* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <openbsc/signal.h>
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#include <stdlib.h>
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#include <string.h>
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static LLIST_HEAD(signal_handler_list);
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struct signal_handler {
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struct llist_head entry;
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unsigned int subsys;
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signal_cbfn *cbfn;
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void *data;
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};
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int register_signal_handler(unsigned int subsys, signal_cbfn *cbfn, void *data)
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{
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struct signal_handler *sig_data = malloc(sizeof(*sig_data));
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if (!sig_data)
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return -ENOMEM;
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memset(sig_data, 0, sizeof(*sig_data));
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sig_data->subsys = subsys;
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sig_data->data = data;
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sig_data->cbfn = cbfn;
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/* FIXME: check if we already have a handler for this subsys/cbfn/data */
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llist_add_tail(&sig_data->entry, &signal_handler_list);
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return 0;
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}
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void unregister_signal_handler(unsigned int subsys, signal_cbfn *cbfn, void *data)
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{
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struct signal_handler *handler;
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llist_for_each_entry(handler, &signal_handler_list, entry) {
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if (handler->cbfn == cbfn && handler->data == data
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&& subsys == handler->subsys) {
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llist_del(&handler->entry);
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free(handler);
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break;
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}
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}
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}
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void dispatch_signal(unsigned int subsys, unsigned int signal, void *signal_data)
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{
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struct signal_handler *handler;
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llist_for_each_entry(handler, &signal_handler_list, entry) {
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if (handler->subsys != subsys)
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continue;
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(*handler->cbfn)(subsys, signal, handler->data, signal_data);
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}
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}
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