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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2021 ARM Limited
* Copyright (c) 2021-2022 Nokia
*/
#ifndef ODP_API_ABI_ATOMIC_GENERIC_H_
#define ODP_API_ABI_ATOMIC_GENERIC_H_
#include <odp/api/atomic.h>
static inline void _odp_atomic_add_u32(odp_atomic_u32_t *atom, uint32_t val)
{
(void)__atomic_fetch_add(&atom->v, val, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_sub_u32(odp_atomic_u32_t *atom, uint32_t val)
{
(void)__atomic_fetch_sub(&atom->v, val, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_inc_u32(odp_atomic_u32_t *atom)
{
(void)__atomic_fetch_add(&atom->v, 1, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_dec_u32(odp_atomic_u32_t *atom)
{
(void)__atomic_fetch_sub(&atom->v, 1, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_max_u32(odp_atomic_u32_t *atom, uint32_t new_val)
{
uint32_t old_val;
old_val = __atomic_load_n(&atom->v, __ATOMIC_RELAXED);
while (new_val > old_val) {
if (__atomic_compare_exchange_n(&atom->v, &old_val, new_val, 0 /* strong */,
__ATOMIC_RELAXED, __ATOMIC_RELAXED))
break;
}
}
static inline void _odp_atomic_min_u32(odp_atomic_u32_t *atom, uint32_t new_val)
{
uint32_t old_val;
old_val = __atomic_load_n(&atom->v, __ATOMIC_RELAXED);
while (new_val < old_val) {
if (__atomic_compare_exchange_n(&atom->v, &old_val, new_val, 0 /* strong */,
__ATOMIC_RELAXED, __ATOMIC_RELAXED))
break;
}
}
static inline void _odp_atomic_add_rel_u32(odp_atomic_u32_t *atom, uint32_t val)
{
(void)__atomic_fetch_add(&atom->v, val, __ATOMIC_RELEASE);
}
static inline void _odp_atomic_sub_rel_u32(odp_atomic_u32_t *atom, uint32_t val)
{
(void)__atomic_fetch_sub(&atom->v, val, __ATOMIC_RELEASE);
}
static inline void _odp_atomic_add_u64(odp_atomic_u64_t *atom, uint64_t val)
{
(void)__atomic_fetch_add(&atom->v, val, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_sub_u64(odp_atomic_u64_t *atom, uint64_t val)
{
(void)__atomic_fetch_sub(&atom->v, val, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_inc_u64(odp_atomic_u64_t *atom)
{
(void)__atomic_fetch_add(&atom->v, 1, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_dec_u64(odp_atomic_u64_t *atom)
{
(void)__atomic_fetch_sub(&atom->v, 1, __ATOMIC_RELAXED);
}
static inline void _odp_atomic_max_u64(odp_atomic_u64_t *atom, uint64_t new_val)
{
uint64_t old_val;
old_val = __atomic_load_n(&atom->v, __ATOMIC_RELAXED);
while (new_val > old_val) {
if (__atomic_compare_exchange_n(&atom->v, &old_val, new_val, 0 /* strong */,
__ATOMIC_RELAXED, __ATOMIC_RELAXED))
break;
}
}
static inline void _odp_atomic_min_u64(odp_atomic_u64_t *atom, uint64_t new_val)
{
uint64_t old_val;
old_val = __atomic_load_n(&atom->v, __ATOMIC_RELAXED);
while (new_val < old_val) {
if (__atomic_compare_exchange_n(&atom->v, &old_val, new_val, 0 /* strong */,
__ATOMIC_RELAXED, __ATOMIC_RELAXED))
break;
}
}
#ifndef ODP_ATOMIC_U64_LOCK
static inline void _odp_atomic_add_rel_u64(odp_atomic_u64_t *atom, uint64_t val)
{
(void)__atomic_fetch_add(&atom->v, val, __ATOMIC_RELEASE);
}
static inline void _odp_atomic_sub_rel_u64(odp_atomic_u64_t *atom, uint64_t val)
{
(void)__atomic_fetch_sub(&atom->v, val, __ATOMIC_RELEASE);
}
#endif
#ifdef __SIZEOF_INT128__
static inline void _odp_atomic_init_u128(odp_atomic_u128_t *atom, odp_u128_t val)
{
atom->v = val;
}
static inline odp_u128_t _odp_atomic_load_u128(odp_atomic_u128_t *atom)
{
union {
odp_u128_t val;
__int128_t i;
} u;
u.i = __atomic_load_n((__int128_t *)&atom->v, __ATOMIC_RELAXED);
return u.val;
}
static inline void _odp_atomic_store_u128(odp_atomic_u128_t *atom, odp_u128_t val)
{
__atomic_store_n((__int128_t *)&atom->v, *(__int128_t *)&val, __ATOMIC_RELAXED);
}
static inline int _odp_atomic_cas_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return __atomic_compare_exchange_n((__int128_t *)&atom->v, (__int128_t *)old_val,
*(__int128_t *)&new_val, 0 /* strong */,
__ATOMIC_RELAXED, __ATOMIC_RELAXED);
}
static inline int _odp_atomic_cas_acq_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return __atomic_compare_exchange_n((__int128_t *)&atom->v, (__int128_t *)old_val,
*(__int128_t *)&new_val, 0 /* strong */,
__ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
}
static inline int _odp_atomic_cas_rel_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return __atomic_compare_exchange_n((__int128_t *)&atom->v, (__int128_t *)old_val,
*(__int128_t *)&new_val, 0 /* strong */,
__ATOMIC_RELEASE, __ATOMIC_RELAXED);
}
static inline int _odp_atomic_cas_acq_rel_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return __atomic_compare_exchange_n((__int128_t *)&atom->v, (__int128_t *)old_val,
*(__int128_t *)&new_val, 0 /* strong */,
__ATOMIC_ACQ_REL, __ATOMIC_RELAXED);
}
#else /* Lock-based implementation */
/**
* @internal
* 128 bit store operation expression for the ATOMIC_OP macro
*/
#define ATOMIC_STORE_OP_128(new_val) \
({ \
(_atom)->v = (new_val); \
})
/**
* @internal
* 128 bit CAS operation expression for the ATOMIC_OP macro
*/
#define ATOMIC_CAS_OP_128(ret_ptr, old_val, new_val) \
__extension__ ({ \
int *_ret_ptr = ret_ptr; \
odp_u128_t *_cas_old = old_val; \
odp_u128_t _cas_new = new_val; \
if (((_atom)->v.u64[0] == (_cas_old)->u64[0]) && \
((_atom)->v.u64[1] == (_cas_old)->u64[1])) { \
(_atom)->v = (_cas_new); \
*(_ret_ptr) = 1; \
} else { \
*(_ret_ptr) = 0; \
} \
})
/**
* @internal
* Helper macro for lock-based atomic operations on 128-bit integers
* @param[in,out] atom Pointer to the 128-bit atomic variable
* @param expr Expression used update the variable.
* @return The old value of the variable.
*/
#define ATOMIC_OP_128(atom, expr) \
__extension__ ({ \
odp_u128_t _old_val; \
odp_atomic_u128_t *_atom = atom; \
/* Loop while lock is already taken, stop when lock becomes clear */ \
while (__atomic_test_and_set(&(_atom)->lock, __ATOMIC_ACQUIRE)) \
(void)0; \
_old_val = (_atom)->v; \
(expr); /* Perform whatever update is desired */ \
__atomic_clear(&(_atom)->lock, __ATOMIC_RELEASE); \
_old_val; /* Return old value */ \
})
static inline void _odp_atomic_init_u128(odp_atomic_u128_t *atom, odp_u128_t val)
{
atom->v.u64[0] = val.u64[0];
atom->v.u64[1] = val.u64[1];
atom->lock = 0;
}
static inline odp_u128_t _odp_atomic_load_u128(odp_atomic_u128_t *atom)
{
return ATOMIC_OP_128(atom, (void)0);
}
static inline void _odp_atomic_store_u128(odp_atomic_u128_t *atom, odp_u128_t val)
{
ATOMIC_OP_128(atom, ATOMIC_STORE_OP_128(val));
}
static inline int _odp_atomic_cas_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
int ret;
*old_val = ATOMIC_OP_128(atom, ATOMIC_CAS_OP_128(&ret, old_val, new_val));
return ret;
}
static inline int _odp_atomic_cas_acq_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return _odp_atomic_cas_u128(atom, old_val, new_val);
}
static inline int _odp_atomic_cas_rel_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return _odp_atomic_cas_u128(atom, old_val, new_val);
}
static inline int _odp_atomic_cas_acq_rel_u128(odp_atomic_u128_t *atom, odp_u128_t *old_val,
odp_u128_t new_val)
{
return _odp_atomic_cas_u128(atom, old_val, new_val);
}
#endif
#endif
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