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/*
* Copyright (C) 2012 Tobias Brunner
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/**
* @defgroup spinlock spinlock
* @{ @ingroup threading
*/
#ifndef THREADING_SPINLOCK_H_
#define THREADING_SPINLOCK_H_
typedef struct spinlock_t spinlock_t;
/**
* Spin lock wrapper implements a lock with low overhead when the lock is held
* only for a short time (waiting wastes processor cycles, though).
*
* If native spin locks are not available regular mutexes are used as fallback.
*/
struct spinlock_t {
/**
* Acquire the lock.
*/
void (*lock)(spinlock_t *this);
/**
* Release the lock.
*/
void (*unlock)(spinlock_t *this);
/**
* Destroy the instance.
*/
void (*destroy)(spinlock_t *this);
};
/**
* Create a spin lock instance.
*
* @return unlocked instance
*/
spinlock_t *spinlock_create();
#endif /** THREADING_SPINLOCK_H_ @} */
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