/* SPDX-License-Identifier: GPL-2.0-only */ #ifndef SMP_ATOMIC_H #define SMP_ATOMIC_H #if CONFIG(SMP) #include <arch/smp/atomic.h> #else typedef struct { int counter; } atomic_t; #define ATOMIC_INIT(i) { (i) } /** * @file include/smp/atomic.h */ /** * atomic_read - read atomic variable * @param v: pointer of type atomic_t * * Atomically reads the value of v. Note that the guaranteed * useful range of an atomic_t is only 24 bits. */ #define atomic_read(v) ((v)->counter) /** * atomic_set - set atomic variable * @param v: pointer of type atomic_t * @param i: required value * * Atomically sets the value of v to i. Note that the guaranteed * useful range of an atomic_t is only 24 bits. */ #define atomic_set(v, i) (((v)->counter) = (i)) /** * atomic_inc - increment atomic variable * @param v: pointer of type atomic_t * * Atomically increments v by 1. Note that the guaranteed * useful range of an atomic_t is only 24 bits. */ #define atomic_inc(v) (((v)->counter)++) /** * atomic_dec - decrement atomic variable * @param v: pointer of type atomic_t * * Atomically decrements v by 1. Note that the guaranteed * useful range of an atomic_t is only 24 bits. */ #define atomic_dec(v) (((v)->counter)--) #endif /* CONFIG_SMP */ #endif /* SMP_ATOMIC_H */