|
Posted by kristoff bonne on July 18, 2006, 9:20 am
Please log in for more thread options
Aan allen die zijn of zullen zijn, onze groet.
I don't know if this is the correct place for this, but I'm looking for
some information about perl threads.
I've been looking into perlthrtut and the other manuals for this, but I
don't see to find the solution.
If it is off-topic, please point me to a more correct newsgroup or forum.
My question is this:
Is there a way to get 100 % certainty if a thread is running.
What I want to do is this:
I have a program that makes a number (actually eigth) of ssh-sessions to
a number of servers using the net::telnet module. On the servers, they
read the log-files to get some information using a "tail -f".
Now, I've got a thread (called "sshmaster") in my main program which
starts up the 8 ssh-session (called "sshsession"); each as a seperate
thread.
These sub-thread communicate back to "sshmaster" for control-messages
(e.g. connection established, connection failed, connection interrupted)
using a queue.
So far, so good. And it does seams to work pretty-much OK, ... as long
as the ssh-sessions behaviour as they are supposted to do.
But, I want to be sure that the sub-threads do keep on working OK, and
-when a subtreads dies for whatever reason- that "sshmaster" is able to
check this.
I see different possibilities:
1/ sent a control-message from the sub-thread to sshmaster over the
message-queue. However, this will not work if the subthread dies for an
unknown reason and it might not be able to sent a message to sshmaster.
2/ lock a variable (which will automatically unlock when the thread
dies), but sshmaster is not able to check if a variable is still locked
without blocking.
3/ As "sshmaster" has a list of all its subthreads, ask a system if a
thread is still alive. But HOW????
The only way I see is by locking a file using the "flock" mechanism but
that'a a bit "overkill" if you ask me.
Anybody any other ideas?
Cheerio! Kr. Bonne.
|
|
Posted by xhoster on July 18, 2006, 11:34 am
Please log in for more thread options
>
> 3/ As "sshmaster" has a list of all its subthreads, ask a system if a
> thread is still alive. But HOW????
Thread::State
Xho
--
-------------------- http://NewsReader.Com/ --------------------
Usenet Newsgroup Service $9.95/Month 30GB
|
| Similar Threads | Posted | | ImageMagick and threads | October 12, 2004, 1:44 pm |
| LWP::UserAgent + HTTPS + threads ==> segmentation fault | November 11, 2004, 9:57 pm |
| xs module, threads and clone of returned objects | January 12, 2008, 6:27 am |
| threads, XSUB allocated memory, destructors, destruction | September 30, 2005, 6:31 pm |
| xs module, threads and clone() - how does clone work ? | January 8, 2008, 3:42 am |
| ANNOUNCE: Initial release of WSF/Perl (Perl bindings for a WS-* framework) | October 4, 2007, 1:37 am |
| PLJava - Perl embeded into Java (calling Perl from Java) - 1sr release - call for tests and review, please. | July 13, 2004, 4:06 am |
| Perl MakeMaker - how to force Perl linking with the static C library (libcrt.lib) instead of dynamic C library (msvcrt.lib) | April 17, 2007, 5:22 pm |
| MFC with Perl | July 19, 2005, 9:38 pm |
| Net::SSH::Perl | October 23, 2005, 11:16 pm |
|
XML Sitemap