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feat(ble_mesh): add cas operation for bt_mesh_atomic_val_t

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luoxu 2024-05-28 17:52:36 +08:00 committed by BOT
parent 7696f0f9b2
commit 63120f0208
2 changed files with 45 additions and 1 deletions
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19
components/bt/esp_ble_mesh/common/atomic.c
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@ -13,7 +13,7 @@
/*
* SPDX-FileCopyrightText: 2016 Intel Corporation
* SPDX-FileCopyrightText: 2011-2014 Wind River Systems, Inc.
* SPDX-FileContributor: 2018-2021 Espressif Systems (Shanghai) CO LTD
* SPDX-FileContributor: 2018-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -170,4 +170,21 @@ bt_mesh_atomic_val_t bt_mesh_atomic_inc(bt_mesh_atomic_t *target)
return ret;
}
bool bt_mesh_atomic_campare_and_set(bt_mesh_atomic_t *target, bt_mesh_atomic_val_t excepted, bt_mesh_atomic_val_t new_val)
{
bt_mesh_atomic_val_t ret = 0;
bt_mesh_atomic_lock();
ret = *target;
if (*target == excepted) {
*target = new_val;
bt_mesh_atomic_unlock();
return true;
}
bt_mesh_atomic_unlock();
return false;
}
#endif /* #ifndef CONFIG_ATOMIC_OPERATIONS_BUILTIN */

27
components/bt/esp_ble_mesh/common/include/mesh/atomic.h
View File

@ -147,6 +147,33 @@ static inline bt_mesh_atomic_val_t bt_mesh_atomic_and(bt_mesh_atomic_t *target,
extern bt_mesh_atomic_val_t bt_mesh_atomic_and(bt_mesh_atomic_t *target, bt_mesh_atomic_val_t value);
#endif
/**
* @brief Atomic CAS operation.
*
* This compares the contents of @a *target
* with the contents of @a excepted. If equal,
* the operation is a read-modify-write operation
* that writes @a new_val into @a *target and return true.
* If they are not equal, the operation is a read
* and return false.
*
* @param target Address of atomic variable.
* @param excepted Value of excepted.
* @param new_val Write value if compare sunncess.
*
* @return
* - true: write operation succeeded.
* - false: write operation failed.
*/
#ifdef CONFIG_ATOMIC_OPERATIONS_BUILTIN
static inline bool bt_mesh_atomic_campare_and_set(bt_mesh_atomic_t *target, bt_mesh_atomic_val_t excepted, bt_mesh_atomic_val_t new_val)
{
return __atomic_compare_exchange_n(target, &excepted, &new_val, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
}
#else
extern bool bt_mesh_atomic_campare_and_set(bt_mesh_atomic_t *target, bt_mesh_atomic_val_t excepted, bt_mesh_atomic_val_t new_val);
#endif
/**
* @cond INTERNAL_HIDDEN
*/