Xenomai
3.0.5
atomic.h
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#ifndef _BOILERPLATE_ATOMIC_H
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#define _BOILERPLATE_ATOMIC_H
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#include <xeno_config.h>
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typedef
struct
{
int
v; }
atomic_t
;
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typedef
struct
{
long
v; } atomic_long_t;
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#define ATOMIC_INIT(__n) { (__n) }
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static
inline
long
atomic_long_read(
const
atomic_long_t *ptr)
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{
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return
ptr->v;
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}
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static
inline
void
atomic_long_set(atomic_long_t *ptr,
long
v)
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{
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ptr->v = v;
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}
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static
inline
int
atomic_read(
const
atomic_t
*ptr)
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{
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return
ptr->v;
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}
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static
inline
void
atomic_set(
atomic_t
*ptr,
long
v)
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{
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ptr->v = v;
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}
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#ifndef atomic_cmpxchg
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#define atomic_cmpxchg(__ptr, __old, __new) \
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__sync_val_compare_and_swap(&(__ptr)->v, __old, __new)
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#endif
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#ifndef atomic_sub_fetch
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#define atomic_sub_fetch(__ptr, __n) \
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__sync_sub_and_fetch(&(__ptr)->v, __n)
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#endif
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#ifndef atomic_add_fetch
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#define atomic_add_fetch(__ptr, __n) \
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__sync_add_and_fetch(&(__ptr)->v, __n)
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#endif
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#ifdef CONFIG_SMP
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#ifndef smp_mb
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#define smp_mb() __sync_synchronize()
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#endif
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#ifndef smp_rmb
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#define smp_rmb() smp_mb()
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#endif
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#ifndef smp_wmb
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#define smp_wmb() smp_mb()
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#endif
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#else
/* !CONFIG_SMP */
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#define smp_mb() do { } while (0)
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#define smp_rmb() do { } while (0)
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#define smp_wmb() do { } while (0)
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#endif
/* !CONFIG_SMP */
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#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
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#define barrier() __asm__ __volatile__("": : :"memory")
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#ifndef cpu_relax
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#define cpu_relax() __sync_synchronize()
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#endif
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#endif
/* _BOILERPLATE_ATOMIC_H */
atomic_t
Copyright © 2011 Gilles Chanteperdrix gilles.chanteperdrix@xenomai.org.
Definition:
atomic.h:24
include
boilerplate
atomic.h
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