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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <odp/spinlock_recursive.h>
#include <odp/thread.h>
#define NO_OWNER (-1)
void odp_spinlock_recursive_init(odp_spinlock_recursive_t *rlock)
{
odp_spinlock_init(&rlock->lock);
rlock->owner = NO_OWNER;
rlock->cnt = 0;
}
void odp_spinlock_recursive_lock(odp_spinlock_recursive_t *rlock)
{
int thr = odp_thread_id();
if (rlock->owner == thr) {
rlock->cnt++;
return;
}
odp_spinlock_lock(&rlock->lock);
rlock->owner = thr;
rlock->cnt = 1;
}
int odp_spinlock_recursive_trylock(odp_spinlock_recursive_t *rlock)
{
int thr = odp_thread_id();
if (rlock->owner == thr) {
rlock->cnt++;
return 1;
}
if (odp_spinlock_trylock(&rlock->lock)) {
rlock->owner = thr;
rlock->cnt = 1;
return 1;
} else {
return 0;
}
}
void odp_spinlock_recursive_unlock(odp_spinlock_recursive_t *rlock)
{
rlock->cnt--;
if (rlock->cnt > 0)
return;
rlock->owner = NO_OWNER;
odp_spinlock_unlock(&rlock->lock);
}
int odp_spinlock_recursive_is_locked(odp_spinlock_recursive_t *rlock)
{
int thr = odp_thread_id();
if (rlock->owner == thr)
return 1;
return odp_spinlock_is_locked(&rlock->lock);
}
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