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siginfo(3): Document SI_LWP signal code.

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Describe SI_LWP as being generated by pthread_kill() because thr_kill() is
a private undocumented function.

MFC after:	1 week
This commit is contained in:
Jilles Tjoelker 2012-09-14 22:10:01 +00:00
parent a4c22c274e
commit 5437c0d6ea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=240523
1 changed files with 14 additions and 2 deletions
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16
share/man/man3/siginfo.3
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@ -197,6 +197,9 @@ signal generated by completion of an asynchronous I/O request
signal generated by arrival of a message on an empty message queue
.It Ta Dv SI_KERNEL Ta
signal generated by miscellaneous parts of the kernel
.It Ta Dv SI_LWP Ta
signal sent by
.Xr pthread_kill 3
.El
.Pp
In addition, the following signal-specific information is available:
@ -273,6 +276,10 @@ the value passed to
system call
.It Ta Va si_mqd Ta
the ID of the message queue which generated the signal
.It Dv SI_LWP Ta Va si_pid Ta
the process ID that sent the signal
.It Ta Va si_uid Ta
real user ID of the process that sent the signal
.El
.Sh NOTES
Currently, the kernel never generates the
@ -284,9 +291,10 @@ signal is queued when a process changed its status or exited.
Realtime Extensions like aio, timer, and message queue also queue
signals.
Signals with code
.Dv SI_USER
or
.Dv SI_USER ,
.Dv SI_KERNEL
or
.Dv SI_LWP
are only queued if there are sufficient resources;
otherwise,
.Dv SI_NOINFO
@ -321,6 +329,10 @@ and
.Dv SI_KERNEL
can be generated as of
.Fx 8.1 .
The code
.Dv SI_LWP
can be generated as of
.Fx 9.0 .
.Sh AUTHORS
This manual page was written by
.An "David Xu" Aq davidxu@FreeBSD.org .