diff options
Diffstat (limited to 'c_src/include/linux/osq_lock.h')
-rw-r--r-- | c_src/include/linux/osq_lock.h | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/c_src/include/linux/osq_lock.h b/c_src/include/linux/osq_lock.h deleted file mode 100644 index bde9f0d2..00000000 --- a/c_src/include/linux/osq_lock.h +++ /dev/null @@ -1,44 +0,0 @@ -#ifndef __LINUX_OSQ_LOCK_H -#define __LINUX_OSQ_LOCK_H - -/* - * An MCS like lock especially tailored for optimistic spinning for sleeping - * lock implementations (mutex, rwsem, etc). - */ -struct optimistic_spin_node { - struct optimistic_spin_node *next, *prev; - int locked; /* 1 if lock acquired */ - int cpu; /* encoded CPU # + 1 value */ -}; - -struct optimistic_spin_queue { - /* - * Stores an encoded value of the CPU # of the tail node in the queue. - * If the queue is empty, then it's set to OSQ_UNLOCKED_VAL. - */ - atomic_t tail; -}; - -#define OSQ_UNLOCKED_VAL (0) - -/* Init macro and function. */ -#define OSQ_LOCK_UNLOCKED { ATOMIC_INIT(OSQ_UNLOCKED_VAL) } - -static inline void osq_lock_init(struct optimistic_spin_queue *lock) -{ - atomic_set(&lock->tail, OSQ_UNLOCKED_VAL); -} - -static inline bool osq_lock(struct optimistic_spin_queue *lock) -{ - return false; -} - -static inline void osq_unlock(struct optimistic_spin_queue *lock) {} - -static inline bool osq_is_locked(struct optimistic_spin_queue *lock) -{ - return atomic_read(&lock->tail) != OSQ_UNLOCKED_VAL; -} - -#endif |