COMPLETE(9) Driver Basics COMPLETE(9)NAME
complete - signals a single thread waiting on this completion
void complete(struct completion * x);
holds the state of this particular completion
This will wake up a single thread waiting on this completion. Threads will be awakened in the same order in which they were queued.
See also complete_all, wait_for_completion and related routines.
It may be assumed that this function implies a write memory barrier before changing the task state if and only if any tasks are woken up.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 COMPLETE(9)
Check Out this Related Man Page
SELRECORD(9) BSD Kernel Developer's Manual SELRECORD(9)NAME
selrecord, selwakeup -- record and wakeup select requests
selrecord(struct thread *td, struct selinfo *sip);
selwakeup(struct selinfo *sip);
selrecord() and selwakeup() are the two central functions used by select(2), poll(2) and the objects that are being selected on. They handle
the task of recording which threads are waiting on which objects and the waking of the proper threads when an event of interest occurs on an
selrecord() records that the calling thread is interested in events related to a given object. If another thread is already waiting on the
object a collision will be flagged in sip which will be later dealt with by selwakeup().
selrecord() acquires and releases sellock.
selwakeup() is called by the underlying object handling code in order to notify any waiting threads that an event of interest has occurred.
If a collision has occurred, selwakeup() will increment nselcoll, and broadcast on the global cv in order to wake all waiting threads so that
they can handle it. If the thread waiting on the object is not currently sleeping or the wait channel is not selwait, selwakeup() will clear
the TDF_SELECT flag which should be noted by select(2) and poll(2) when they wake up.
The contents of *sip must be zeroed, such as by softc initialization, before any call to selrecord() or selwakeup(), otherwise a panic may
occur. selwakeup() acquires and releases sellock and may acquire and release sched_lock.
SEE ALSO poll(2), select(2)AUTHORS
This manual page was written by Chad David <davidc@FreeBSD.org> and Alfred Perlstein <alfred@FreeBSD.org>.
BSD June 13, 2007 BSD
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