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* Inline {acquire,release}_spinlock(), when spinlock debugging is disabled.

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* Use atomic_{and,or}() instead of atomic_set(), as there are no built-ins
  for the latter.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35021 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
2010-01-11 22:13:11 +00:00
parent 9c6720c064
commit 3fb2a94dfb
2 changed files with 45 additions and 10 deletions
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headers/private/kernel/smp.h
+29
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@@ -62,8 +62,37 @@ int32 smp_get_current_cpu(void);
int smp_intercpu_int_handler(int32 cpu);
void _acquire_spinlock(spinlock* lock);
#ifdef __cplusplus
}
#endif
// Unless spinlock debug features are enabled, try to inline
// {acquire,release}_spinlock().
#if !DEBUG_SPINLOCKS && !B_DEBUG_SPINLOCK_CONTENTION
static inline void
acquire_spinlock_inline(spinlock* lock)
{
if (atomic_or((int32*)lock, 1) == 0)
return;
_acquire_spinlock(lock);
}
static inline void
release_spinlock_inline(spinlock* lock)
{
atomic_and((int32*)lock, 0);
}
#define acquire_spinlock(lock) acquire_spinlock_inline(lock)
#define release_spinlock(lock) release_spinlock_inline(lock)
#endif // !DEBUG_SPINLOCKS && !B_DEBUG_SPINLOCK_CONTENTION
#endif /* KERNEL_SMP_H */