writefx and threads

[Jari-Matti Mäkelä]

Matthias Walter wrote:
> Hello,
> 
> I've written a simple threaded application, where 30 threads only print some messages. If I use writefln() for this, it looks like this:
> 
> ...
> Thread started...
> Thread finished.
> TTThread started...
> Thread finished.
> hread started...
> Thread finished.
> hread started...
> Thread finished.
> ...
> 
> If I use standard printf(), this doesn't happen, it looks like
> 
> ...
> Thread started...
> Thread finished...
> Thread started...
> Thread finished...
> ...
> 
> Looking at std/stdio.d, there's a "__fp_lock(fp);" call in writefx(), but it seems to me,
> this doesn't help to sync the output routines. Or are output routines not
> supposed to be synced by default? If yes, this seems to be okay from
some point of view,
> but is somehow irritating!

D uses buffered I/O. You may need to explicitly call flush() to finish
all output before sending new. One other thing, without thread
synchronization there is no guarantee that the threads are run in a
specific order.

BTW, please use this newsgroup for reporting bugs, there's
digitalmars.D.learn for asking questions.