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https://github.com/zephyrproject-rtos/zephyr
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f69a38162a
There's a typedef for non-pointer values compatible with atomic non-pointer objects. Add a similar typedef for pointer values, and the corresponding macro for initializing atomic pointer types. This also will simplify replacing the Zephyr atomic API with one based on C11 atomics, should that be desirable. C11 atomic pointer values are not void*. Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/*
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* Copyright (c) 1997-2015, Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_SYS_ATOMIC_C_H_
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#define ZEPHYR_INCLUDE_SYS_ATOMIC_C_H_
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/* Included from <atomic.h> */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Simple and correct (but very slow) implementation of atomic
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* primitives that require nothing more than kernel interrupt locking.
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*/
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__syscall bool atomic_cas(atomic_t *target, atomic_val_t old_value,
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atomic_val_t new_value);
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__syscall bool atomic_ptr_cas(atomic_ptr_t *target, atomic_ptr_val_t old_value,
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atomic_ptr_val_t new_value);
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__syscall atomic_val_t atomic_add(atomic_t *target, atomic_val_t value);
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__syscall atomic_val_t atomic_sub(atomic_t *target, atomic_val_t value);
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static inline atomic_val_t atomic_inc(atomic_t *target)
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{
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return atomic_add(target, 1);
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}
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static inline atomic_val_t atomic_dec(atomic_t *target)
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{
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return atomic_sub(target, 1);
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}
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extern atomic_val_t atomic_get(const atomic_t *target);
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extern atomic_ptr_val_t atomic_ptr_get(const atomic_ptr_t *target);
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__syscall atomic_val_t atomic_set(atomic_t *target, atomic_val_t value);
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__syscall atomic_ptr_val_t atomic_ptr_set(atomic_ptr_t *target, atomic_ptr_val_t value);
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static inline atomic_val_t atomic_clear(atomic_t *target)
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{
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return atomic_set(target, 0);
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}
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static inline atomic_ptr_val_t atomic_ptr_clear(atomic_ptr_t *target)
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{
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return atomic_ptr_set(target, NULL);
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}
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__syscall atomic_val_t atomic_or(atomic_t *target, atomic_val_t value);
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__syscall atomic_val_t atomic_xor(atomic_t *target, atomic_val_t value);
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__syscall atomic_val_t atomic_and(atomic_t *target, atomic_val_t value);
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__syscall atomic_val_t atomic_nand(atomic_t *target, atomic_val_t value);
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#ifdef __cplusplus
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}
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#endif
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#ifdef CONFIG_ATOMIC_OPERATIONS_C
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#include <syscalls/atomic_c.h>
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#endif
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#endif /* ZEPHYR_INCLUDE_SYS_ATOMIC_C_H_ */
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