-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _RTE_SPINLOCK_H_
#ifdef RTE_FORCE_INTRINSICS
#include <rte_common.h>
#endif
+#include <rte_pause.h>
/**
* The rte_spinlock_t type.
static inline void
rte_spinlock_lock(rte_spinlock_t *sl)
{
- while (__sync_lock_test_and_set(&sl->locked, 1))
- while(sl->locked)
+ int exp = 0;
+
+ while (!__atomic_compare_exchange_n(&sl->locked, &exp, 1, 0,
+ __ATOMIC_ACQUIRE, __ATOMIC_RELAXED)) {
+ while (__atomic_load_n(&sl->locked, __ATOMIC_RELAXED))
rte_pause();
+ exp = 0;
+ }
}
#endif
static inline void
rte_spinlock_unlock (rte_spinlock_t *sl)
{
- __sync_lock_release(&sl->locked);
+ __atomic_store_n(&sl->locked, 0, __ATOMIC_RELEASE);
}
#endif
static inline int
rte_spinlock_trylock (rte_spinlock_t *sl)
{
- return __sync_lock_test_and_set(&sl->locked,1) == 0;
+ int exp = 0;
+ return __atomic_compare_exchange_n(&sl->locked, &exp, 1,
+ 0, /* disallow spurious failure */
+ __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
#endif
*/
static inline int rte_spinlock_is_locked (rte_spinlock_t *sl)
{
- return sl->locked;
+ return __atomic_load_n(&sl->locked, __ATOMIC_ACQUIRE);
}
/**