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Add thread fences to <machine/atomic.h>

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This commit is contained in:
Sebastian Huber 2016-10-24 13:29:03 +02:00
parent cc8f00d614
commit 71a0436d14
1 changed files with 52 additions and 0 deletions
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52
rtemsbsd/include/machine/atomic.h
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@ -1399,4 +1399,56 @@ atomic_store_rel_long(volatile long *p, long v)
#endif #endif
} }
static inline void
atomic_thread_fence_acq(void)
{
#if defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_ATOMIC)
std::atomic_thread_fence(std::memory_order_acquire);
#elif defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_STDATOMIC)
atomic_thread_fence(memory_order_acquire);
#else
RTEMS_COMPILER_MEMORY_BARRIER();
#endif
}
static inline void
atomic_thread_fence_rel(void)
{
#if defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_ATOMIC)
std::atomic_thread_fence(std::memory_order_release);
#elif defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_STDATOMIC)
atomic_thread_fence(memory_order_release);
#else
RTEMS_COMPILER_MEMORY_BARRIER();
#endif
}
static inline void
atomic_thread_fence_acq_rel(void)
{
#if defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_ATOMIC)
std::atomic_thread_fence(std::memory_order_acq_rel);
#elif defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_STDATOMIC)
atomic_thread_fence(memory_order_acq_rel);
#else
RTEMS_COMPILER_MEMORY_BARRIER();
#endif
}
static inline void
atomic_thread_fence_seq_cst(void)
{
#if defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_ATOMIC)
std::atomic_thread_fence(std::memory_order_seq_cst);
#elif defined(_RTEMS_BSD_MACHINE_ATOMIC_USE_STDATOMIC)
atomic_thread_fence(memory_order_seq_cst);
#else
RTEMS_COMPILER_MEMORY_BARRIER();
#endif
}
#endif /* _RTEMS_BSD_MACHINE_ATOMIC_H_ */ #endif /* _RTEMS_BSD_MACHINE_ATOMIC_H_ */