Xotcl

xotcl@alice.wu.ac.at

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1st Call For Papers, 18th Annual Tcl/Tk Conference 2011
by Andreas Kupries 11 Apr '11

11 Apr '11

18th Annual Tcl/Tk Conference (Tcl'2011) http://www.tcl.tk/community/tcl2011/ October 24 - 28, 2011 Comfort Suites Manassas Manassas, Virgina, USA Important Dates: Abstracts and proposals due August 26, 2011 Notification to authors September 12, 2011 WIP and BOF reservations open August 1, 2011 Author materials due October 9, 2011 Tutorials Start October 24, 2011 Conference starts October 26, 2011 Email Contact: tclconference(a)googlegroups.com Submission of Summaries Tcl/Tk 2011 will be held in Manassas, Virgina, USA from October 24 - 28, 2011. The program committee is asking for papers and presentation proposals from anyone using or developing with Tcl/Tk (and extensions). Past conferences have seen submissions covering a wide variety of topics including: * Scientific and engineering applications * Industrial controls * Distributed applications and Network Managment * Object oriented extensions to Tcl/Tk * New widgets for Tk * Simulation and application steering with Tcl/Tk * Tcl/Tk-centric operating environments * Tcl/Tk on small and embedded devices * Medical applications and visualization * Use of different programming paradigms in Tcl/Tk and proposals for new directions. * New areas of exploration for the Tcl/Tk language This year is the fourth year that the Tcl community is participating in the Google Summer of Code. The conference program committee would like to encourage submissions that report on the Tcl projects selected for Google SoC 2011. Submissions should consist of an abstract of about 100 words and a summary of not more than two pages, and should be sent as plain text to <tclconference AT googlegroups DOT com> no later than August 30, 2011. Authors of accepted abstracts will have until October 14, 2011 to submit their final paper for the inclusion in the conference proceedings. The proceedings will be made available on digital media, so extra materials such as presentation slides, code examples, code for extensions etc. are encouraged. Printed proceedings will be produced as an on-demand book at lulu.com The authors will have 25 minutes to present their paper at the conference. The program committee will review and evaluate papers according to the following criteria: * Quantity and quality of novel content * Relevance and interest to the Tcl/Tk community * Suitability of content for presentation at the conference Proposals may report on commercial or non-commercial systems, but those with only blatant marketing content will not be accepted. Application and experience papers need to strike a balance between background on the application domain and the relevance of Tcl/Tk to the application. Application and experience papers should clearly explain how the application or experience illustrates a novel use of Tcl/Tk, and what lessons the Tcl/Tk community can derive from the application or experience to apply to their own development efforts. Papers accompanied by non-disclosure agreements will be returned to the author(s) unread. All submissions are held in the highest confidentiality prior to publication in the Proceedings, both as a matter of policy and in accord with the U. S. Copyright Act of 1976. The primary author for each accepted paper will receive registration to the Technical Sessions portion of the conference at a reduced rate. Other Forms of Participation The program committee also welcomes proposals for panel discussions of up to 90 minutes. Proposals should include a list of confirmed panelists, a title and format, and a panel description with position statements from each panelist. Panels should have no more than four speakers, including the panel moderator, and should allow time for substantial interaction with attendees. Panels are not presentations of related research papers. Slots for Works-in-Progress (WIP) presentations and Birds-of-a-Feather sessions (BOFs) are available on a first-come, first-served basis starting in August 1, 2011. Specific instructions for reserving WIP and BOF time slots will be provided in the registration information available in June 2011. Some WIP and BOF time slots will be held open for on-site reservation. All attendees with an interesting work in progress should consider reserving a WIP slot. Registration Information More information on the conference is available the conference Web site (http://www.tcl.tk/community/tcl2011/) and will be published on various Tcl/Tk-related information channels. To keep in touch with news regarding the conference and Tcl events in general, subscribe to the tcl-announce list. See: http://aspn.activestate.com/ASPN/Mail/ to subscribe to the tcl-announce mailing list. Conference Committee Clif Flynt Noumena Corp General Chair, Website Admin Andreas Kupries ActiveState Software Inc. Program Chair Cyndy Lilagan Iomas Research, LLC Brian Griffin Mentor Graphics Ron Fox NSCL/FRIB Michigan State University Arjen Markus Deltares Mike Doyle Iomas Research, LLC Gerald Lester KnG Consulting, LLC Donal Fellows University of Manchester Jeffrey Hobbs ActiveState Software Inc. Steve Landers Digital Smarties Kevin Kenny GE Global Research Center Larry Virden Tcl FAQ Maintainer Steve Redler IV SR Technology Contact Information tclconference(a)googlegroups.com Tcl'2011 would like to thank those who are sponsoring the conference: ActiveState Software Inc. Buonacorsi Foundation Mentor Graphics Noumena Corp. SR Technology Tcl Community Association

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Compiling NX fails
by Victor Mayevski 22 Mar '11

22 Mar '11

Hello Gustaf, I have switched the TCL repository from SourceForge to Fossil, got the latest sources, compiled and installed TCL. The problem now is that NX will not compile against it. Make fails with this error: ######################################################################################## gcc -DPACKAGE_NAME=\"nsf\" -DPACKAGE_TARNAME=\"nsf\" -DPACKAGE_VERSION=\"2.0.0\" -DPACKAGE_STRING=\"nsf\ 2.0.0\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_LIMITS_H=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_TCL_COMPILE_H=1 -DUSE_THREAD_ALLOC=1 -D_REENTRANT=1 -D_THREAD_SAFE=1 -DTCL_THREADS=1 -DMODULE_SCOPE=extern\ __attribute__$\(__visibility__\(\"hidden\"$\)\) -D_LARGEFILE64_SOURCE=1 -DTCL_WIDE_INT_TYPE=long\ long -DHAVE_STRUCT_STAT64=1 -DHAVE_OPEN64=1 -DHAVE_LSEEK64=1 -DHAVE_TYPE_OFF64_T=1 -DUSE_TCL_STUBS=1 -DCOMPILE_NSF_STUBS=1 -DNSF_VERSION=\"2.0\" -DNSF_PATCHLEVEL=\"2.0.0\" -I"/root/tcl-src-fossil/generic" -I"/root/tcl-src-fossil/unix" -I./generic -g -O2 -pipe -O2 -fomit-frame-pointer -Wall -fPIC -c `echo ./generic/nsf.c` -o nsf.o ./generic/nsf.c: In function ‘MethodDispatchCsc’: ./generic/nsf.c:7797: error: ‘TEOV_callback’ undeclared (first use in this function) ./generic/nsf.c:7797: error: (Each undeclared identifier is reported only once ./generic/nsf.c:7797: error: for each function it appears in.) ./generic/nsf.c:7797: error: ‘rootPtr’ undeclared (first use in this function) ./generic/nsf.c: In function ‘DispatchDestroyMethod’: ./generic/nsf.c:8503: warning: too many arguments for format make: *** [nsf.o] Error 1 ################################################################################### If I uncomment "#define NRE_SANE_PATCH 1", as I had to do every time I compiled NX, the error is even longer, I will just give the first few lines: ################################################################################### gcc -DPACKAGE_NAME=\"nsf\" -DPACKAGE_TARNAME=\"nsf\" -DPACKAGE_VERSION=\"2.0.0\" -DPACKAGE_STRING=\"nsf\ 2.0.0\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_LIMITS_H=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_TCL_COMPILE_H=1 -DUSE_THREAD_ALLOC=1 -D_REENTRANT=1 -D_THREAD_SAFE=1 -DTCL_THREADS=1 -DMODULE_SCOPE=extern\ __attribute__$\(__visibility__\(\"hidden\"$\)\) -D_LARGEFILE64_SOURCE=1 -DTCL_WIDE_INT_TYPE=long\ long -DHAVE_STRUCT_STAT64=1 -DHAVE_OPEN64=1 -DHAVE_LSEEK64=1 -DHAVE_TYPE_OFF64_T=1 -DUSE_TCL_STUBS=1 -DCOMPILE_NSF_STUBS=1 -DNSF_VERSION=\"2.0\" -DNSF_PATCHLEVEL=\"2.0.0\" -I"/root/tcl-src-fossil/generic" -I"/root/tcl-src-fossil/unix" -I./generic -g -O2 -pipe -O2 -fomit-frame-pointer -Wall -fPIC -c `echo ./generic/nsf.c` -o nsf.o In file included from ./generic/nsf.c:45: ./generic/nsfInt.h:725: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘NRE_SANE_PATCH’ ./generic/nsfInt.h:792: warning: data definition has no type or storage class ./generic/nsfInt.h:792: warning: type defaults to ‘int’ in declaration of ‘NsfRuntimeState’ ./generic/nsf.c: In function ‘NsfLog’: ./generic/nsf.c:362: error: expected expression before ‘)’ token In file included from ./generic/nsf.c:629: ./generic/nsfStack.c: In function ‘CscListAdd’: ./generic/nsfStack.c:21: error: expected expression before ‘)’ token ./generic/nsfStack.c: In function ‘CscListRemove’: ./generic/nsfStack.c:42: error: expected expression before ‘)’ token ./generic/nsfStack.c: In function ‘Nsf_PushFrameObj’: ./generic/nsfStack.c:144: error: expected expression before ‘)’ token ./generic/nsfStack.c: In function ‘Nsf_PushFrameCsc’: ./generic/nsfStack.c:187: error: expected expression before ‘)’ token ./generic/nsfStack.c: In function ‘CallStackPopAll’: ######################################################################################## I am on Debian based Linux, 32bit. Thanks, Victor

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Possible bug in NX
by Victor Mayevski 21 Mar '11

21 Mar '11

Hello Gustaf, I encountered an issue with [info parent] and where parent's name contains a space. While [info children] behaves correctly by returning a list: {::pa rent::child} [info parent] just returns the name: ::pa rent instead of: {::pa rent} This is fixable by using [list [info parent]] but I wonder if that should be the default behavior in NX anyway? Thanks, Victor

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Fwd: Re: namespace in constructor referring an instvar?
by Gustaf Neumann 16 Mar '11

16 Mar '11

Dear Tuyen, Most likely, you want something like the following (see below). Adding additional namespaces makes things more complicated. Creating procs from a constructor is as well a rather unusual construction, normally you want to define methods accessing the instance variables... best regards -gustaf neumann =================== Class create MatlabInterface -parameter {iss} MatlabInterface instproc ok {} { my instvar iss tk_messageBox -type ok -icon info -title "MicWatch" -message $iss } MatlabInterface i1 -iss Hello? i1 ok =================== Am 16.03.11 13:40, schrieb Tuyen Hoang: > Can anyone tell me how to refer an instvar from within a namespace defined > inside a class constructor? With my attempt below the $iss in the tk_messageBox > line is undefined. > > Class create MatlabInterface > > MatlabInterface instproc init {} { > my instvar iss > namespace eval MicWatch { > proc add {} { > tk_messageBox -type ok -icon info -title "MicWatch" -message > "$iss" > } > } > } > > I’m new to Tcl, let alone XOTcl, and don’t know how to search the posts in the > mailing list so forgive me if the question has been asked before. > > Regards, > > Tuyen > > > > > _______________________________________________ > Xotcl mailing list > Xotcl(a)alice.wu-wien.ac.at > http://alice.wu-wien.ac.at/mailman/listinfo/xotcl -- Univ.Prof. Dr. Gustaf Neumann Institute of Information Systems and New Media WU Vienna Augasse 2-6, A-1090 Vienna, AUSTRIA

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namespace in constructor referring an instvar?
by Tuyen Hoang 16 Mar '11

16 Mar '11

Can anyone tell me how to refer an instvar from within a namespace defined inside a class constructor? With my attempt below the $iss in the tk_messageBox line is undefined. Class create MatlabInterface MatlabInterface instproc init {} { my instvar iss namespace eval MicWatch { proc add {} { tk_messageBox -type ok -icon info -title "MicWatch" -message "$iss" } } } I’m new to Tcl, let alone XOTcl, and don’t know how to search the posts in the mailing list so forgive me if the question has been asked before. Regards, Tuyen

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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

2 3

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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