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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __TOOLS_LINUX_ATOMIC_H
#define __TOOLS_LINUX_ATOMIC_H
#include <asm/atomic.h>
void atomic_long_set(atomic_long_t *v, long i);
/* atomic_cmpxchg_relaxed */
#ifndef atomic_cmpxchg_relaxed
#define atomic_cmpxchg_relaxed atomic_cmpxchg
#define atomic_cmpxchg_release atomic_cmpxchg
#endif /* atomic_cmpxchg_relaxed */
static inline bool atomic_try_cmpxchg(atomic_t *ptr, int *oldp, int new)
{
int ret, old = *oldp;
ret = atomic_cmpxchg(ptr, old, new);
if (ret != old)
*oldp = ret;
return ret == old;
}
static inline bool atomic_inc_unless_negative(atomic_t *v)
{
int c = atomic_read(v);
do {
if (unlikely(c < 0))
return false;
} while (!atomic_try_cmpxchg(v, &c, c + 1));
return true;
}
#endif /* __TOOLS_LINUX_ATOMIC_H */
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