perf/bench/futex.h

32  * @uaddr:	address of first futex
34  * @val:	typically expected value of uaddr, but varies by op
49 futex_syscall(volatile u_int32_t *uaddr, int op, u_int32_t val, struct timespec *timeout,
52 	return syscall(SYS_futex, uaddr, op | opflags, val, timeout, uaddr2, val3);
56 futex_syscall_nr_requeue(volatile u_int32_t *uaddr, int op, u_int32_t val, int nr_requeue,
59 	return syscall(SYS_futex, uaddr, op | opflags, val, nr_requeue, uaddr2, val3);
63  * futex_wait() - block on uaddr with optional timeout
67 futex_wait(u_int32_t *uaddr, u_int32_t val, struct timespec *timeout, int opflags)
69 	return futex_syscall(uaddr, FUTEX_WAIT, val, timeout, NULL, 0, opflags);
73  * futex_wake() - wake one or more tasks blocked on uaddr
77 futex_wake(u_int32_t *uaddr, int nr_wake, int opflags)
79 	return futex_syscall(uaddr, FUTEX_WAKE, nr_wake, NULL, NULL, 0, opflags);
83  * futex_lock_pi() - block on uaddr as a PI mutex
86 futex_lock_pi(u_int32_t *uaddr, struct timespec *timeout, int opflags)
88 	return futex_syscall(uaddr, FUTEX_LOCK_PI, 0, timeout, NULL, 0, opflags);
92  * futex_unlock_pi() - release uaddr as a PI mutex, waking the top waiter
95 futex_unlock_pi(u_int32_t *uaddr, int opflags)
97 	return futex_syscall(uaddr, FUTEX_UNLOCK_PI, 0, NULL, NULL, 0, opflags);
101 * futex_cmp_requeue() - requeue tasks from uaddr to uaddr2
106 futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wake,
109 	return futex_syscall_nr_requeue(uaddr, FUTEX_CMP_REQUEUE, nr_wake, nr_requeue, uaddr2,
114  * futex_wait_requeue_pi() - block on uaddr and prepare to requeue to uaddr2
115  * @uaddr:	non-PI futex source
122 futex_wait_requeue_pi(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2,
125 	return futex_syscall(uaddr, FUTEX_WAIT_REQUEUE_PI, val, timeout, uaddr2, 0,
130  * futex_cmp_requeue_pi() - requeue tasks from uaddr to uaddr2
131  * @uaddr:	non-PI futex source
139 futex_cmp_requeue_pi(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2,
142 	return futex_syscall_nr_requeue(uaddr, FUTEX_CMP_REQUEUE_PI, 1, nr_requeue, uaddr2,