95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/*
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* Copyright (C) 2015 Christian Meffert <christian.meffert@googlemail.com>
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "listener.h"
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struct listener
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{
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notify notify_cb;
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short events;
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struct listener *next;
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};
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struct listener *listener_list = NULL;
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int
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listener_add(notify notify_cb, short events)
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{
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struct listener *listener;
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listener = (struct listener*)malloc(sizeof(struct listener));
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if (!listener)
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{
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return -1;
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}
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listener->notify_cb = notify_cb;
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listener->events = events;
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listener->next = listener_list;
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listener_list = listener;
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return 0;
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}
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int
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listener_remove(notify notify_cb)
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{
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struct listener *listener;
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struct listener *prev;
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prev = NULL;
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for (listener = listener_list; listener; listener = listener->next)
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{
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if (listener->notify_cb == notify_cb)
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break;
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prev = listener;
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}
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if (!listener)
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{
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return -1;
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}
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if (prev)
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prev->next = listener->next;
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else
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listener_list = listener->next;
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free(listener);
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return 0;
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}
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void
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listener_notify(short event_mask)
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{
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struct listener *listener;
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listener = listener_list;
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while (listener)
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{
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if (event_mask & listener->events)
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listener->notify_cb(event_mask & listener->events);
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listener = listener->next;
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}
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}
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