diff options
Diffstat (limited to 'doc/fileevent.n')
| -rw-r--r-- | doc/fileevent.n | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/doc/fileevent.n b/doc/fileevent.n index 99fe43a..eb555f5 100644 --- a/doc/fileevent.n +++ b/doc/fileevent.n @@ -28,17 +28,17 @@ interact with the user while waiting for the data to arrive. If an application invokes \fBgets\fR or \fBread\fR on a blocking channel when there is no input data available, the process will block; until the input data arrives, it will not be able to service other events, so it will -appear to the user to ``freeze up''. With \fBfileevent\fR, the process can +appear to the user to +.QW "freeze up" . +With \fBfileevent\fR, the process can tell when data is present and only invoke \fBgets\fR or \fBread\fR when -they won't block. +they will not block. .PP -.VS The \fIchannelId\fR argument to \fBfileevent\fR refers to an open channel such as a Tcl standard channel (\fBstdin\fR, \fBstdout\fR, or \fBstderr\fR), the return value from an invocation of \fBopen\fR or \fBsocket\fR, or the result of a channel creation command provided by a Tcl extension. -.VE .PP If the \fIscript\fR argument is specified, then \fBfileevent\fR creates a new event handler: \fIscript\fR will be evaluated @@ -94,7 +94,7 @@ The script for a file event is executed at global level (outside the context of any Tcl procedure) in the interpreter in which the \fBfileevent\fR command was invoked. If an error occurs while executing the script then the -\fBbgerror\fR mechanism is used to report the error. +command registered with \fBinterp bgerror\fR is used to report the error. In addition, the file event handler is deleted if it ever returns an error; this is done in order to prevent infinite loops due to buggy handlers. @@ -117,7 +117,7 @@ proc GetData {chan} { by Mark Diekhans. .SH "SEE ALSO" -bgerror(n), fconfigure(n), gets(n), puts(n), read(n), Tcl_StandardChannels(3) +fconfigure(n), gets(n), interp(n), puts(n), read(n), Tcl_StandardChannels(3) .SH KEYWORDS asynchronous I/O, blocking, channel, event handler, nonblocking, readable, |