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/* Copyright (c) 2013-2018, Linaro Limited
* Copyright (c) 2022, Nokia
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef ODP_PLAT_SPINLOCK_RECURSIVE_INLINES_H_
#define ODP_PLAT_SPINLOCK_RECURSIVE_INLINES_H_
#include <odp/api/spinlock.h>
#include <odp/api/thread.h>
#include <odp/api/abi/spinlock_recursive.h>
#include <odp/api/plat/debug_inlines.h>
#include <stdint.h>
/** @cond _ODP_HIDE_FROM_DOXYGEN_ */
#ifndef _ODP_NO_INLINE
/* Inline functions by default */
#define _ODP_INLINE static inline
#define odp_spinlock_recursive_init __odp_spinlock_recursive_init
#define odp_spinlock_recursive_lock __odp_spinlock_recursive_lock
#define odp_spinlock_recursive_trylock __odp_spinlock_recursive_trylock
#define odp_spinlock_recursive_unlock __odp_spinlock_recursive_unlock
#define odp_spinlock_recursive_is_locked __odp_spinlock_recursive_is_locked
#include <odp/api/plat/spinlock_inlines.h>
#include <odp/api/plat/thread_inlines.h>
#else
#undef _ODP_INLINE
#define _ODP_INLINE
#endif
_ODP_INLINE void odp_spinlock_recursive_init(odp_spinlock_recursive_t *rlock)
{
odp_spinlock_init(&rlock->lock);
rlock->owner = -1;
rlock->cnt = 0;
}
_ODP_INLINE void odp_spinlock_recursive_lock(odp_spinlock_recursive_t *rlock)
{
int thr = odp_thread_id();
if (rlock->owner == thr) {
_ODP_ASSERT(rlock->cnt < UINT32_MAX);
rlock->cnt++;
return;
}
odp_spinlock_lock(&rlock->lock);
rlock->owner = thr;
rlock->cnt = 1;
}
_ODP_INLINE int odp_spinlock_recursive_trylock(odp_spinlock_recursive_t *rlock)
{
int thr = odp_thread_id();
if (rlock->owner == thr) {
_ODP_ASSERT(rlock->cnt < UINT32_MAX);
rlock->cnt++;
return 1;
}
if (odp_spinlock_trylock(&rlock->lock)) {
rlock->owner = thr;
rlock->cnt = 1;
return 1;
}
return 0;
}
_ODP_INLINE void odp_spinlock_recursive_unlock(odp_spinlock_recursive_t *rlock)
{
_ODP_ASSERT(rlock->cnt);
rlock->cnt--;
if (rlock->cnt > 0)
return;
rlock->owner = -1;
odp_spinlock_unlock(&rlock->lock);
}
_ODP_INLINE int odp_spinlock_recursive_is_locked(odp_spinlock_recursive_t *rlock)
{
return odp_thread_id() == rlock->owner ? 1 : odp_spinlock_is_locked(&rlock->lock);
}
/** @endcond */
#endif
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