| /* |
| * Copyright (c) 2016, Intel Corporation |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of the Intel Corporation nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> |
| */ |
| |
| #include <sof/notifier.h> |
| #include <sof/sof.h> |
| #include <sof/lock.h> |
| #include <sof/list.h> |
| |
| /* General purpose notifiers */ |
| |
| struct notify { |
| spinlock_t lock; |
| struct list_item list; /* list of notifiers */ |
| }; |
| |
| static struct notify _notify; |
| |
| void notifier_register(struct notifier *notifier) |
| { |
| spin_lock(&_notify.lock); |
| list_item_prepend(¬ifier->list, &_notify.list); |
| spin_unlock(&_notify.lock); |
| } |
| |
| void notifier_unregister(struct notifier *notifier) |
| { |
| spin_lock(&_notify.lock); |
| list_item_del(¬ifier->list); |
| spin_unlock(&_notify.lock); |
| } |
| |
| void notifier_event(int id, int message, void *event_data) |
| { |
| struct list_item *wlist; |
| struct notifier *n; |
| |
| spin_lock(&_notify.lock); |
| |
| if (list_is_empty(&_notify.list)) |
| goto out; |
| |
| /* iterate through notifiers and send event to interested clients */ |
| list_for_item(wlist, &_notify.list) { |
| |
| n = container_of(wlist, struct notifier, list); |
| if (n->id == id) |
| n->cb(message, n->cb_data, event_data); |
| } |
| |
| out: |
| spin_unlock(&_notify.lock); |
| } |
| |
| void init_system_notify(struct sof *sof) |
| { |
| list_init(&_notify.list); |
| spinlock_init(&_notify.lock); |
| } |