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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2015-2018 Linaro Limited
* Copyright (c) 2021 ARM Limited
*/
#include <odp/api/atomic.h>
int odp_atomic_lock_free_u64(odp_atomic_op_t *atomic_op)
{
#if __GCC_ATOMIC_LLONG_LOCK_FREE < 2
/* All operations have locks */
if (atomic_op)
atomic_op->all_bits = 0;
return 0;
#else
/* All operations are lock-free */
if (atomic_op) {
atomic_op->all_bits = ~((uint32_t)0);
atomic_op->op.init = 0;
}
return 2;
#endif
}
int odp_atomic_lock_free_u128(odp_atomic_op_t *atomic_op)
{
#ifdef _ODP_LOCK_FREE_128BIT_ATOMICS
if (atomic_op) {
atomic_op->all_bits = 0;
atomic_op->op.load = 1;
atomic_op->op.store = 1;
atomic_op->op.cas = 1;
}
return 2;
#elif defined(__SIZEOF_INT128__)
if (__atomic_is_lock_free(16, NULL)) {
if (atomic_op) {
atomic_op->all_bits = 0;
atomic_op->op.load = 1;
atomic_op->op.store = 1;
atomic_op->op.cas = 1;
}
return 2;
}
#endif
/* All operations have locks */
if (atomic_op)
atomic_op->all_bits = 0;
return 0;
}
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