4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
34 * \brief Notifier obj (implementation).
37 * \author Bernardo Innocenti <bernie@develer.com>
38 * \author Francesco Sacchi <batt@develer.com>
43 *#* Revision 1.2 2006/07/19 12:56:26 bernie
44 *#* Convert to new Doxygen style.
46 *#* Revision 1.1 2005/11/04 18:26:38 bernie
47 *#* Import into DevLib.
49 *#* Revision 1.5 2005/06/09 13:49:22 batt
50 *#* Reformat; correct some comments.
52 *#* Revision 1.4 2005/06/09 13:23:58 batt
53 *#* Add some comments.
55 *#* Revision 1.3 2005/06/08 17:32:33 batt
56 *#* Switch to new messaging system.
58 *#* Revision 1.2 2005/06/06 11:04:12 batt
59 *#* Add some comments.
61 *#* Revision 1.1 2005/05/26 08:32:53 batt
62 *#* Add new Develer widget system :)
66 #include <cfg/debug.h>
69 #include <dt/dnotifier.h>
70 #include <mware/list.h>
73 * Default update used to notify target: notify all trasparently all
74 * targets in the list.
76 static void notifier_update(DNotifier *n, dtag_t tag, dval_t val)
78 dnotify_targets(n, tag, val);
84 void notifier_init(DNotifier *n)
87 n->update = notifier_update;
88 LIST_INIT(&n->targets);
92 * Search in the map a tag and a val corresponding to the ones supplied.
93 * If a match is found change them to the corresponding ones in the map.
94 * If map is NULL the filter is trasparent and all messages sent to filter
95 * will be forwarded to its target.
97 void filter_update(DFilter *f, dtag_t tag, dval_t val)
100 const DFilterMap *map = f->map;
104 while (map->src.tag != TAG_END)
106 if ((map->src.tag == tag) && (map->src.val == val))
112 /* TAG_ANY matches anything */
113 if (map->src.tag == TAG_ANY)
118 if (map->src.tag != TAG_END)
119 dnotify(f->target, tag, val);
122 dnotify(f->target, tag, val);
127 * Search in the table a tag corresponding to the one supplied and a val
128 * that has at least the mask map supplied bits to one.
129 * If a match is found change them to the corresponding ones in the map.
130 * If map is NULL the filter is trasparent and all messages sent to filter
131 * will be forwarded to its target.
133 void filter_mask_update(DFilter *f, dtag_t tag, dval_t val)
136 const DFilterMap *map = f->map;
141 while (map->src.tag != TAG_END)
143 mask = (dfilter_mask_t) map->src.val;
144 if ((map->src.tag == tag) && ((mask & (dfilter_mask_t)val) == mask))
150 /* TAG_ANY matches anything */
151 if (map->src.tag == TAG_ANY)
157 if (map->src.tag != TAG_END)
158 dnotify(f->target, tag, val);
161 dnotify(f->target, tag, val);
165 #define FILTER_MAGIC_ACTIVE 0xAA
168 * If \a masked is true, all the fields value in \a map must be interpreted as a mask of bits.
170 void filter_init(DFilter *f, const DFilterMap *map, bool masked, DNotifier *source, DNotifier *target)
174 f->update = (update_filter_ptr)filter_mask_update;
176 f->update = (update_filter_ptr)filter_update;
178 /* set filter map and target */
182 /* these ensure that the filter is not inserted in more than one list */
183 ASSERT(f->magic != FILTER_MAGIC_ACTIVE);
184 DB(f->magic = FILTER_MAGIC_ACTIVE;)
186 /* Add the filter to source filter list */
187 ADDTAIL(&source->targets, &f->link);