Hi Sharon,
Thank you for your reply.
When I sent the STAF command to request a mutex, I got no response back at all.
It seems it was waiting for something. I couldn’t type any commands at all in
the DOS command window. I had to use “Ctrl-C” to terminate. It looked like
this:
C:\>STAF local SEM REQUEST MUTEX MutexStart GARBAGECOLLECT NO
I figured out the mutex I requested was a pending mutex. I think the request
was in a queue. That is why it is waiting.
It would be nice to get back the control even the requested mutex is pending.
Thanks,
Cindy
From: Sharon Lucas [mailto:luc...@us.ibm.com]
Sent: February-28-12 3:57 PM
To: Cindy Zhu
Cc: staf-users@lists.sourceforge.net
Subject: Re: [staf-users] Request Mutex
Hi Cindy,
If the SEM REQUEST MUTEX request worked, you get RC 0 and no message in the
result. You can then query the mutex if you like to see that it is now exists
and is owned. For example:
C:\>STAF local SEM REQUEST MUTEX MutexStart GARBAGECOLLECT NO
Response
--------
C:\>STAF local SEM QUERY MUTEX MutexStart
Response
--------
{
State : Owned
Owner : {
Machine : client1.austin.ibm.com
Handle Name : STAF/Client
Handle : 147
User : none://anonymous
Endpoint : local://local
Date-Time Requested : 20120228-16:46:08
Date-Time Acquired : 20120228-16:46:08
Perform Garbage Collection: No
}
Pending Requests: []
}
When you're ready to release the mutex semaphore, you can do so as follows.
Note that if successful, RC=0 and there will be no message in the result.
C:\>STAF local SEM RELEASE MUTEX MutexStart FORCE
Response
--------
C:\>STAF local SEM QUERY MUTEX MutexStart
Response
--------
{
State : Unowned
Owner : <None>
Pending Requests: []
}
C:\>
Note that the section "8.15.2 REQUEST" in the STAF User's Guide at
http://staf.sourceforge.net/current/STAFUG.htm#HDRSEMSRV says in its "Results"
sub-section says:
Results
The result buffer will contain no data on a successful return from a REQUEST
command.
Note that many STAF service requests do not return any data in the result when
successful when there is nothing more to say. The RC=0 indicates that the STAF
service request was successful.
--------------------------------------------------------------
Sharon Lucas
IBM Austin, luc...@us.ibm.com<mailto:luc...@us.ibm.com>
(512) 286-7313 or Tieline 363-7313
From: Cindy Zhu <c...@fekete.com<mailto:c...@fekete.com>>
To:
"staf-users@lists.sourceforge.net<mailto:staf-users@lists.sourceforge.net>"
<staf-users@lists.sourceforge.net<mailto:staf-users@lists.sourceforge.net>>,
Date: 02/28/2012 03:40 PM
Subject: [staf-users] Request Mutex
________________________________
Hi,
I sent a STAF command “STAF local SEM REQUEST MUTEX MutexStart GARBAGECOLLECT
NO” to request a mutex from the command line. But I didn’t see any response.
Can you please tell me how to debug this?
I tried other STAF commands on the same machine and I got responses.
Thanks,
Cindy
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