Date: Tue, 21 Nov 2000 11:36:36 -0800 (PST) From: Alan Cox <alc@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern vfs_aio.c src/sys/sys signal.h Message-ID: <200011211936.LAA76264@freefall.freebsd.org>
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alc 2000/11/21 11:36:36 PST
Modified files:
sys/kern vfs_aio.c
sys/sys signal.h
Log:
Provide a new interface for the user of aio_read() and aio_write() to request
a kevent upon completion of the I/O. Specifically, introduce a new type
of sigevent notification, SIGEV_EVENT. If sigev_notify is SIGEV_EVENT,
then sigev_notify_kqueue names the kqueue that should receive the event
and sigev_value contains the "void *" is copied into the kevent's udata
field.
In contrast to the existing interface, this one: 1) works on
the Alpha 2) avoids the extra copyin() call for the kevent because all
of the information needed is in the sigevent and 3) could be
applied to request a single kevent upon completion of an entire lio_listio().
Reviewed by: jlemon
Revision Changes Path
1.87 +34 -30 src/sys/kern/vfs_aio.c
1.25 +8 -2 src/sys/sys/signal.h
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