| #ifndef _SPINLOCK_H |
| #define _SPINLOCK_H |
| |
| #include <stdatomic.h> |
| |
| struct spinlock { |
| atomic_flag v; |
| }; |
| |
| #define SPINLOCK_INIT \ |
| { \ |
| .v = ATOMIC_FLAG_INIT \ |
| } |
| |
| static inline void sl_init(struct spinlock *l) |
| { |
| *l = (struct spinlock)SPINLOCK_INIT; |
| } |
| |
| static inline void sl_lock(struct spinlock *l) |
| { |
| while (atomic_flag_test_and_set_explicit(&l->v, memory_order_acquire)) { |
| /* do nothing */ |
| } |
| } |
| |
| static inline void sl_unlock(struct spinlock *l) |
| { |
| atomic_flag_clear_explicit(&l->v, memory_order_release); |
| } |
| |
| #endif /* _SPINLOCK_H */ |