51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
/*
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* \brief Spin lock
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* \author Norman Feske
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* \date 2012-01-27
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*/
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/*
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* Copyright (C) 2012-2013 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__SPIN_LOCK_H_
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#define _INCLUDE__DDE_KIT__SPIN_LOCK_H_
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/**
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* Private spin lock type
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*/
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typedef volatile int dde_kit_spin_lock;
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enum { DDE_KIT_SPIN_LOCK_LOCKED, DDE_KIT_SPIN_LOCK_UNLOCKED };
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/**
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* Initialize spin 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_spin_lock_init(dde_kit_spin_lock *spin_lock);
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/**
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* Acquire spin lock
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*/
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void dde_kit_spin_lock_lock(dde_kit_spin_lock *spin_lock);
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/**
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* Try to acquire a lock (non-blocking)
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*/
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int dde_kit_spin_lock_try_lock(dde_kit_spin_lock *spin_lock);
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/**
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* Release spin lock
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*/
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void dde_kit_spin_lock_unlock(dde_kit_spin_lock *spin_lock);
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#endif /* _INCLUDE__DDE_KIT__SPIN_LOCK_H_ */
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