66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/*
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* \brief Locks (i.e., mutex)
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* \author Christian Helmuth
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* \date 2008-08-15
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*/
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/*
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* Copyright (C) 2008-2012 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _INCLUDE__DDE_KIT__LOCK_H_
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#define _INCLUDE__DDE_KIT__LOCK_H_
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/**
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* Private lock type
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*/
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struct dde_kit_lock;
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/**
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* Initialize lock
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*
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* \param out_lock lock handle (output parameter)
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*
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* The created lock is free (not acquired) after initialization.
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*/
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void dde_kit_lock_init(struct dde_kit_lock **out_lock);
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/**
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* Destroy lock
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*
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* \param lock lock handle
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*
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* The old lock handle is invalidated.
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*/
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void dde_kit_lock_deinit(struct dde_kit_lock *lock);
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/**
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* Acquire lock
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*
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* \param lock lock handle
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*/
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void dde_kit_lock_lock(struct dde_kit_lock *lock);
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/**
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* Acquire a lock (non-blocking)
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*
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* \param lock lock handle
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*
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* \return lock state
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* \retval 0 lock was aquired
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* \retval 1 lock was not aquired
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*/
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int dde_kit_lock_try_lock(struct dde_kit_lock *lock);
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/**
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* Release lock
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*
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* \param lock lock handle
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*/
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void dde_kit_lock_unlock(struct dde_kit_lock *lock);
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#endif /* _INCLUDE__DDE_KIT__LOCK_H_ */
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