futex_wait_setup man page on OpenSuSE

futex_wait_setup man page on OpenSuSE

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FUTEX_WAIT_SETUP(9)	      Futex API reference	   FUTEX_WAIT_SETUP(9)

NAME
       futex_wait_setup - Prepare to wait on a futex

SYNOPSIS
       int futex_wait_setup(u32 __user * uaddr, u32 val, unsigned int flags,
			    struct futex_q * q,
			    struct futex_hash_bucket ** hb);

ARGUMENTS
       uaddr
	   the futex userspace address

       val
	   the expected value

       flags
	   futex flags (FLAGS_SHARED, etc.)

       q
	   the associated futex_q

       hb
	   storage for hash_bucket pointer to be returned to caller

DESCRIPTION
       Setup the futex_q and locate the hash_bucket. Get the futex value and
       compare it with the expected value. Handle atomic faults internally.
       Return with the hb lock held and a q.key reference on success, and
       unlocked with no q.key reference on failure.

RETURN
       0 - uaddr contains val and hb has been locked; <1 - -EFAULT or
       -EWOULDBLOCK (uaddr does not contain val) and hb is unlocked

AUTHOR
       Rusty Russell <rusty@rustcorp.com.au>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.11	 November 2013		   FUTEX_WAIT_SETUP(9)

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