rte_atomic.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */
 
#ifndef _RTE_ATOMIC_H_
#define _RTE_ATOMIC_H_
 
#include <stdint.h>
 
#include <rte_common.h>
#include <rte_stdatomic.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifdef __DOXYGEN__
 
 
static inline void rte_mb(void);
 
static inline void rte_wmb(void);
 
static inline void rte_rmb(void);
 
 
static inline void rte_io_mb(void);
 
static inline void rte_io_wmb(void);
 
static inline void rte_io_rmb(void);
 
#endif /* __DOXYGEN__ */
 
#ifdef RTE_TOOLCHAIN_MSVC
#define rte_compiler_barrier() _ReadWriteBarrier()
#else
#define rte_compiler_barrier() do {     \
    asm volatile ("" : : : "memory");   \
} while(0)
#endif
 
static inline void rte_atomic_thread_fence(rte_memory_order memorder);
 
 
/*------------------------ 128 bit atomic operations -------------------------*/
 
typedef struct __rte_aligned(16) {
    union {
        uint64_t val[2];
#ifdef RTE_ARCH_64
#ifndef RTE_TOOLCHAIN_MSVC
        __extension__ __int128 int128;
#endif
#endif
    };
} rte_int128_t;
 
#ifdef __DOXYGEN__
 
static inline int
rte_atomic128_cmp_exchange(rte_int128_t *dst,
               rte_int128_t *exp,
               const rte_int128_t *src,
               unsigned int weak,
               int success,
               int failure);
 
#endif /* __DOXYGEN__ */
 
#ifdef __cplusplus
}
#endif
 
#endif /* _RTE_ATOMIC_H_ */