Xotcl February 2011

xotcl@alice.wu.ac.at

7 participants
7 discussions

XOTcl 1.6.6 available
by Gustaf Neumann 03 Nov '11

03 Nov '11

Announcing XOTcl 1.6.6 ************************* Dear XOTcl Community, We are pleased to announce the availability of XOTcl 1.6.6 Major changes relative to 1.6.5 are: * improved 64-bit compatibility (expat) * fixed minor memory leaks (info methods, forward error case) * fixed potential cyclic dependencies via namespace imports during cleanup * fixed potential crash with var-traces being fired twice * compatibility with Tcl 8.6b1 * fix for debian packaging For more details about the changes, please consult the ChangeLog and documentation. The planned next release will be 2.0.0 MORE INFORMATION General and more detailed information about XOTcl and its components can be found at http://www.xotcl.org best regards -gustaf neumann

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NX attributes
by Victor Mayevski 18 May '11

18 May '11

Although it might be something obvious but I cannot think of it at the moment. How do I delete attributes created with the "attribute" method?

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NX unknown method
by Victor Mayevski 20 Feb '11

20 Feb '11

Hello Gustaff, I am having a problem with unknown in NX, where, if I define my own "unknown" method, in which I just check for presence of some argument, if that argument does not exist, I pass processing further on via [next] to the built-in "unknown" processor, well, at least that's what I would like to do. What I find is that there is no further processing done, [next] does not do anything, the unknown method just returns silently. Am I doing something wrong? ########################################## Class create C C method unknown args { if {$args eq "test"} { puts "found test"; return }; next; } C create obj; obj test > found test obj xyz > #nothing, no error ############################################ Thanks, Victor

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XOTcl and Thread
by Krzysztof Frukacz 11 Feb '11

11 Feb '11

Hello again, I am trying to add multi-threaded support for my application. I now face a problem witch combining XOTCl and Thread. The problem is that ::thread::create creates a new instance of interpreter which has own variables. I can have variables shared between threads using ::tsv functions. So here is how it looks: 1. Thread #1 creates object myObject and stores in a shared variable: ::tsv::set array1 key1 [MyClass myObject] 2. Thread #2 gets the shared variable and tries to call a proc defined for MyClass: set localVar [::tsv::get array1 key1] $localVar doSomething At this point second thread will throw en exception saying: Unknown command 'myObject' What would be the proper way to "register" the object myObject (which already exists) in another thread? -- Krzysztof

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Re: [Xotcl] XOTcl and Thread
by Krzysztof Frukacz 10 Feb '11

10 Feb '11

On 02/10/2011 03:26 PM, Victor Mayevski wrote: > #Thread #1 > tsv::set array1 key2 [tread::id] > > #Thread #2 > set tid [tsv::get array1 key2] > thread::send $tid [list $localVar doSomething] > > On Feb 10, 2011 5:27 AM, "Krzysztof Frukacz" > <frukacz.krzysztof(a)gmail.com <mailto:frukacz.krzysztof@gmail.com>> wrote: Hello Victor, This looks like a nice solution. As far as I understand Thread #1 would have to call thread::wait to enter event loop to be able to process what was sent from Thread #2, right? I would like Thread #1 to do its work and receive commands from Thread #2. The problem is that when Thread #1 calls thread::wait it will wait until another thread sends a script, right? In case there is nothing to do (in the event loop) I would like Thread #1 to continue normal work. How can I do that? -- K

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Expand init arguments and custom destructor
by Krzysztof Frukacz 08 Feb '11

08 Feb '11

Hello, Thank for all your help so far. I have two more questions: 1. Is it less efficient if I expand a list before providing it as an argument for init? set myList [list 1 2 3 4] MyClass myObject $myList vs eval MyClass myObject $myList 2. When do I need to create a custom destructor? I create objects inside init - do I have to do that in this case, or will those object be destroyed automatically when I destroy their parent? MyClass instproc init args { my contains { MySecondClass innerObject } } Best Regards, Krzysztof

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NX memory leak
by Victor Mayevski 05 Feb '11

05 Feb '11

Hello Gustaf, I am using the latest Tcl 8.6 from SourceForge and latest NX on 32bit Linux. I am experiencing a pretty bad memory leak when using NX objects with attributes. Example code: time {Object create o; o attribute "[clock clicks] [clock clicks]";o destroy} 1000000 Within like 3 minutes the memory usage grows to around 300meg. Thanks, Victor

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Xotcl February 2011