Re: redirecting the standard output to different std outputs?

[James Rogers <jimmaureenrogers@worldnet.att.net>]

Mark Biggar wrote:
> 
> Frank wrote:
> > Is it possible to say that one task shall have one std output and another
> > task a different std output?
> > Eg. that two task (in the same Ada-program) can have std output to different
> > Xterm windows in Linux.
> 
> No, the Ada Io packages are not task save, or aware.  You can't even
> reliably write form two tasks to the same file with out imposing
> your own explicit locking protocol, such as using a protected
> object or a handler task.

On the other hand, it is possible to open each device (Xterm) as a
separate file, and write to that file in only one task. If this does
not meet your needs then consider creating one or more tasks whose
role is to output data. You could design those tasks to take their
input data either from an entry using the classical Ada rendezvous,
or using a protected object as a communication buffer. Tasks 
requiring output would simply call the entry on the task or the
protected object to "output" their data. The task actually writing
to the Xterm would respond to the data and perform the required
actions.

Jim Rogers
Colorado Springs, Colorado USA