Re: printw() and pthreads

[Thomas Dickey]

On Fri, 14 Dec 2007, ChCarver wrote:

> I believe the issue is inside printw(). That when the thread is suspended
> for the console thread and then returned a duplicate character is placed to
> the screen.

Actually it sounds as if you're going into the display code more than
once.  You're presumably aware that ncurses is not thread-safe(*) - have
to wrap your calls appropriately.

> Question: To get around this will I need to start using mvaddch() as that
> places the character at an absolute position, where as printw() might be
> incrementing a position. The reason I went with printw() was it handled the
> scrolling for me. If I start using mvaddch(), how do I get the window to
> still scroll to the next line?

addch would wrap - but combined with moving on each addch call, that's
not straightforward...

(*) I've been making changes in that area, but am stuck on a change where
    a recursive mutex is blocking itself ;-)

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net