/* SPDX-License-Identifier: GPL-2.0 */#ifndef __TOOLS_ASM_GENERIC_ATOMIC_H#define __TOOLS_ASM_GENERIC_ATOMIC_H #include <linux/compiler.h>#include <linux/types.h>#include <linux/bitops.h> /* * Atomic operations that C can't guarantee us.  Useful for * resource counting etc.. * * Excerpts obtained from the Linux kernel sources. */ #define ATOMIC_INIT(i)	{ (i) } /** * atomic_read - read atomic variable * @v: pointer of type atomic_t * * Atomically reads the value of @v. */static inline int atomic_read(const atomic_t *v){	return READ_ONCE((v)->counter);} /** * atomic_set - set atomic variable * @v: pointer of type atomic_t * @i: required value * * Atomically sets the value of @v to @i. */static inline void atomic_set(atomic_t *v, int i){        v->counter = i;} /** * atomic_inc - increment atomic variable * @v: pointer of type atomic_t * * Atomically increments @v by 1. */static inline void atomic_inc(atomic_t *v){	__sync_add_and_fetch(&v->counter, 1);} /** * atomic_dec_and_test - decrement and test * @v: pointer of type atomic_t * * Atomically decrements @v by 1 and * returns true if the result is 0, or false for all other * cases. */static inline int atomic_dec_and_test(atomic_t *v){	return __sync_sub_and_fetch(&v->counter, 1) == 0;} #define cmpxchg(ptr, oldval, newval) \	__sync_val_compare_and_swap(ptr, oldval, newval) static inline int atomic_cmpxchg(atomic_t *v, int oldval, int newval){	return cmpxchg(&(v)->counter, oldval, newval);} static inline int test_and_set_bit(long nr, unsigned long *addr){	unsigned long mask = BIT_MASK(nr);	long old; 	addr += BIT_WORD(nr); 	old = __sync_fetch_and_or(addr, mask);	return !!(old & mask);} static inline int test_and_clear_bit(long nr, unsigned long *addr){	unsigned long mask = BIT_MASK(nr);	long old; 	addr += BIT_WORD(nr); 	old = __sync_fetch_and_and(addr, ~mask);	return !!(old & mask);} #endif /* __TOOLS_ASM_GENERIC_ATOMIC_H */