b5528d39f2
Add support for blocking call events in event notifier to support functions which require waiting for events. Change-Id: I255c19bc956506ea5076bb5fb1f09327141611a6 Signed-off-by: Ramprasad Katkam <katkam@codeaurora.org>
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* Copyright (c) 2018, The Linux Foundation. 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 version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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#include <dsp/msm-audio-event-notify.h>
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#include <linux/export.h>
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static ATOMIC_NOTIFIER_HEAD(msm_aud_evt_notifier_list);
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static BLOCKING_NOTIFIER_HEAD(msm_aud_evt_blocking_notifier_list);
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/**
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* msm_aud_evt_register_client - register a client notifier
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* @nb: notifier block to callback on events
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*/
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int msm_aud_evt_register_client(struct notifier_block *nb)
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{
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return atomic_notifier_chain_register(&msm_aud_evt_notifier_list, nb);
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}
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EXPORT_SYMBOL(msm_aud_evt_register_client);
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/**
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* msm_aud_evt_unregister_client - unregister a client notifier
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* @nb: notifier block to callback on events
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*/
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int msm_aud_evt_unregister_client(struct notifier_block *nb)
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{
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return atomic_notifier_chain_unregister(&msm_aud_evt_notifier_list, nb);
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}
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EXPORT_SYMBOL(msm_aud_evt_unregister_client);
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/**
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* msm_aud_evt_notifier_call_chain - notify clients of fb_events
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*
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*/
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int msm_aud_evt_notifier_call_chain(unsigned long val, void *v)
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{
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return atomic_notifier_call_chain(&msm_aud_evt_notifier_list, val, v);
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}
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EXPORT_SYMBOL_GPL(msm_aud_evt_notifier_call_chain);
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/**
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* msm_aud_evt_blocking_register_client - register a client notifier
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* @nb: notifier block to callback on events
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*/
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int msm_aud_evt_blocking_register_client(struct notifier_block *nb)
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{
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return blocking_notifier_chain_register(
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&msm_aud_evt_blocking_notifier_list, nb);
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}
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EXPORT_SYMBOL(msm_aud_evt_blocking_register_client);
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/**
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* msm_aud_evt_unregister_client - unregister a client notifier
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* @nb: notifier block to callback on events
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*/
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int msm_aud_evt_blocking_unregister_client(struct notifier_block *nb)
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{
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return blocking_notifier_chain_unregister(
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&msm_aud_evt_blocking_notifier_list, nb);
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}
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EXPORT_SYMBOL(msm_aud_evt_blocking_unregister_client);
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/**
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* msm_aud_evt_notifier_call_chain - notify clients of fb_events
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* @val: event or enum maintained by caller
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* @v: private data pointer
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*
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*/
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int msm_aud_evt_blocking_notifier_call_chain(unsigned long val, void *v)
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{
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return blocking_notifier_call_chain(
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&msm_aud_evt_blocking_notifier_list, val, v);
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}
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EXPORT_SYMBOL_GPL(msm_aud_evt_blocking_notifier_call_chain);
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