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Futex?Futex???????????Linux?????????????????????????????????????????????????????????????????????????????
Futex????????????????????????
struct futex_q???????Futex????????????????
plist_node list???????Futex??????????????task_struct *task?????Futex???????????spinlock_t *lock_ptr?????Futex???????union futex_key key?Futex???????????????????Futex?futex_pi_state *pi_state????????????????rt_mutex_waiter *rt_waiter?????Futex??????union futex_key????Futex??????????????Futex?????????
struct shared???????????Futex?????????????struct private???????????Futex????????????????struct both????????????Futex?????????????struct futex_hash_bucket?????????????????
spinlock_t lock???????????plist_head chain????????Futex??????????????????Futex?????????
Futex?????????????????????
Futex??????????futex_init??????????????Futex????????
Futex???????
futex_wait???Futex????????????????futex_wake?????Futex????????????futex_requeue?????Futex?????????????????Futex???????Pi-Futex????futex_lock_pi?futex_unlock_pi?????????????????????Pi-Futex????????????????????????????????
Futex?????????syscall_futex????????????????????
FUTEX_WAIT???Futex?????????????FUTEX_WAKE?????Futex????FUTEX_REQUEUE?????Futex?????FUTEX_CMP_REQUEUE??????????????????????????FUTEX_LOCK_PI?????????????FUTEX_UNLOCK_PI?????????????????do_futex???????Futex????????????????
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FUTEX_WAIT?FUTEX_WAIT_BITSET?????futex_wait?FUTEX_WAKE?FUTEX_WAKE_BITSET?????futex_wake?FUTEX_REQUEUE?FUTEX_CMP_REQUEUE?????futex_requeue?FUTEX_LOCK_PI?FUTEX_UNLOCK_PI????????Pi-Futex????????????????????????
Futex?????????????????????
??Futex????????????????
Futex??????????
???Futex??????????????Linux?????????Futex?????????????????????????????????????????????????Futex??????????????????????????????????
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