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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2013-2018 Linaro Limited
*/
/**
* @file
*
* ODP spinlock
*/
#ifndef ODP_API_SPEC_SPINLOCK_H_
#define ODP_API_SPEC_SPINLOCK_H_
#include <odp/visibility_begin.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup odp_locks
* @details
* <b> Spin lock (odp_spinlock_t) </b>
*
* Spinlock simply re-tries to acquire the lock as long as takes to succeed.
* Spinlock is not fair since some threads may succeed more often than others.
* @{
*/
/**
* @typedef odp_spinlock_t
* ODP spinlock
*/
/**
* Initialize spin lock.
*
* @param splock Pointer to a spin lock
*/
void odp_spinlock_init(odp_spinlock_t *splock);
/**
* Acquire spin lock.
*
* @param splock Pointer to a spin lock
*/
void odp_spinlock_lock(odp_spinlock_t *splock);
/**
* Try to acquire spin lock.
*
* @param splock Pointer to a spin lock
*
* @retval 0 lock not acquired
* @retval !0 lock acquired
*/
int odp_spinlock_trylock(odp_spinlock_t *splock);
/**
* Release spin lock.
*
* @param splock Pointer to a spin lock
*/
void odp_spinlock_unlock(odp_spinlock_t *splock);
/**
* Check if spin lock is busy (locked).
*
* @param splock Pointer to a spin lock
*
* @retval 1 lock busy (locked)
* @retval 0 lock not busy.
*/
int odp_spinlock_is_locked(odp_spinlock_t *splock);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#include <odp/visibility_end.h>
#endif
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