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Formatting changes to the pthread_testcancel(3).

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Use list for the cancellation points enumeration.  Move notes about
functions into the list inline.

The discussion of the idiomatic use of cancellation facilities does
not belong to RETURN VALUES section, move it to NOTES.

Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2015-03-29 19:37:41 +00:00
parent b072e86d09
commit 02211f0a93
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=280819
1 changed files with 60 additions and 59 deletions
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119
share/man/man3/pthread_testcancel.3
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@ -100,77 +100,70 @@ type will be in effect.
.Ss Cancellation Points
Cancellation points will occur when a thread is executing the following
functions:
.Fn accept ,
.Fn accept4 ,
.Fn aio_suspend ,
.Fn connect ,
.Fn close ,
.Fn creat ,
.Fn fsync ,
.Fn kevent ,
.Fn mq_receive ,
.Fn mq_send ,
.Fn mq_timedreceive ,
.Fn mq_timedsend ,
.Fn msync ,
.Fn nanosleep ,
.Fn open ,
.Fn openat ,
.Fn pause ,
.Fn poll ,
.Fn pselect ,
.Fn pthread_cond_timedwait ,
.Fn pthread_cond_wait ,
.Fn pthread_join ,
.Fn pthread_testcancel ,
.Fn read ,
.Fn readv ,
.Fn recv ,
.Fn recvfrom ,
.Fn recvmsg ,
.Fn select ,
.Fn sem_timedwait ,
.Fn sem_wait ,
.Fn send ,
.Fn sendmsg ,
.Fn sendto ,
.Fn sigsuspend ,
.Fn sigtimedwait ,
.Fn sigwaitinfo ,
.Fn sigwait ,
.Fn sleep ,
.Fn system ,
.Fn tcdrain ,
.Fn usleep ,
.Fn wait ,
.Fn wait3 ,
.Fn wait4 ,
.Fn waitpid ,
.Fn write ,
.Fn writev .
.Pp
.Bl -tag -width "Fn pthread_cond_timedwait" -compact
.It Fn accept
.It Fn accept4
.It Fn aio_suspend
.It Fn connect
.It Fn close
.It Fn creat
.It Fn fcntl
The
.Fn fcntl
function is a cancellation point if
.Fa cmd
is
.Dv F_SETLKW .
.Pp
.It Fn fsync
.It Fn kevent
The
.Fn kevent
function is a cancellation point if it is potentially blocking,
i.e. when the
.Fa nevents
argument is non-zero.
.Sh RETURN VALUES
If successful, the
.Fn pthread_setcancelstate
and
.Fn pthread_setcanceltype
functions will return zero.
Otherwise, an error number shall be returned to
indicate the error.
.Pp
.It Fn mq_receive
.It Fn mq_send
.It Fn mq_timedreceive
.It Fn mq_timedsend
.It Fn msync
.It Fn nanosleep
.It Fn open
.It Fn openat
.It Fn pause
.It Fn poll
.It Fn pselect
.It Fn pthread_cond_timedwait
.It Fn pthread_cond_wait
.It Fn pthread_join
.It Fn pthread_testcancel
.It Fn read
.It Fn readv
.It Fn recv
.It Fn recvfrom
.It Fn recvmsg
.It Fn select
.It Fn sem_timedwait
.It Fn sem_wait
.It Fn send
.It Fn sendmsg
.It Fn sendto
.It Fn sigsuspend
.It Fn sigtimedwait
.It Fn sigwaitinfo
.It Fn sigwait
.It Fn sleep
.It Fn system
.It Fn tcdrain
.It Fn usleep
.It Fn wait
.It Fn wait3
.It Fn wait4
.It Fn waitpid
.It Fn write
.It Fn writev
.El
.Sh NOTES
The
.Fn pthread_setcancelstate
and
@ -212,6 +205,14 @@ entry to the object.
.Pp
Finally, only functions that are cancel-safe may be called from a thread that
is asynchronously cancelable.
.Sh RETURN VALUES
If successful, the
.Fn pthread_setcancelstate
and
.Fn pthread_setcanceltype
functions will return zero.
Otherwise, an error number shall be returned to
indicate the error.
.Sh ERRORS
The function
.Fn pthread_setcancelstate