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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2015-2018 Linaro Limited
* Copyright (c) 2021 ARM Limited
*/
/**
* @file
*
* ODP atomic operations
*/
#ifndef ODP_ABI_ATOMIC_H_
#define ODP_ABI_ATOMIC_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <odp/api/std_types.h>
#include <odp/api/align.h>
/**
* @internal
* Atomic 32-bit unsigned integer
*/
typedef struct ODP_ALIGNED(sizeof(uint32_t)) odp_atomic_u32_s {
uint32_t v; /**< Actual storage for the atomic variable */
} odp_atomic_u32_t;
#if __GCC_ATOMIC_LLONG_LOCK_FREE >= 2
/**
* @internal
* Atomic 64-bit unsigned integer
*/
typedef struct ODP_ALIGNED(sizeof(uint64_t)) odp_atomic_u64_s {
uint64_t v; /**< Actual storage for the atomic variable */
} odp_atomic_u64_t;
#else
/**
* @internal
* Use embedded lock for atomic 64-bit variable implementation
*/
#define ODP_ATOMIC_U64_LOCK 1
/**
* @internal
* Atomic 64-bit unsigned integer
*/
typedef struct ODP_ALIGNED(sizeof(uint64_t)) odp_atomic_u64_s {
uint64_t v; /**< Actual storage for the atomic variable */
/* Some architectures do not support lock-free operations on 64-bit
* data types. We use a spin lock to ensure atomicity. */
char lock; /**< Spin lock (if needed) used to ensure atomic access */
} odp_atomic_u64_t;
#endif
#if defined(__SIZEOF_INT128__) || defined(_ODP_LOCK_FREE_128BIT_ATOMICS)
/**
* @internal
* Atomic 128-bit unsigned integer
*/
typedef struct ODP_ALIGNED(sizeof(odp_u128_t)) odp_atomic_u128_s {
odp_u128_t v; /**< Actual storage for the atomic variable */
} odp_atomic_u128_t;
#else
/**
* @internal
* Atomic 128-bit unsigned integer
*/
typedef struct ODP_ALIGNED(sizeof(odp_u128_t)) odp_atomic_u128_s {
odp_u128_t v; /**< Actual storage for the atomic variable */
/* Some architectures do not support lock-free operations on 128-bit
* data types. We use a spin lock to ensure atomicity. */
char lock; /**< Spin lock (if needed) used to ensure atomic access */
} odp_atomic_u128_t;
#endif
#ifdef __cplusplus
}
#endif
#endif
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