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  • how to get the size of a C global array into an assembly program written for the avr architecture co

    - by johannes
    I have a .c file with the following uint8_t buffer[32] I have a .S file where I want to do the following cpi r29, buffer+sizeof(buffer) The second argument for cpi muste be an imidiate value not a location. But unfortunetly sizeof() is a c operator. Both files, are getting compiled to seperate object files and linked afterwards. If I do avr-objdump -x file.c. Amongst other things, I get the size of the buffer. So it is already available in the object file. How do I access the size of the buffer in my assembly file at compile time?

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  • How to set up global connect to datebase in pylons(python), sqlalchemy.

    - by gummmibear
    Hi! I just start lern python, pylons. i have problem with setting up datebase connection. i won't to set connection, where i can see this connection in all my controllers. Now i use: some thing like this in my controller: 45 ' db = create_engine('mysql://root:password@localhost/python') 46 ' metadata = MetaData(db) 47 48 ' email_list = Table('email',metadata,autoload=True) in development.ini i have: 44 sqlalchemy.url = mysql://root@password@localhost/python 45 sqlalchemy.pool_recycle = 3600 and now, pleas help me to set __init__.py

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  • How do I tag files in a directory in a SVN repository with a global version number that will appear

    - by mithaldu
    I am working on a project that stores multiple versions in the same svn repo but in different directories. For ease of reference for the coders working on the project I'd like to be able to add a commented tag similarly to # $Revision: 144 $ However, instead of the file revision it should contain a simple version number like so: # $Version: 1.63 $ # $Version: 1.64 $ # $Version: 2.0 $ Is there a way to get subversion to do this automatically for a specific directory and all sub-directories as well as for any new files added to those?

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  • Why doesn't C# allow for global inferred types i.e. using var?

    - by BritishDeveloper
    I know it can't be done since using var can only be done for local variables. I'm just wondering if anyone has a theory why the C# team thought this should be so. e.g. what would be wrong with this: public class SomeClass { var someString = "hello"; //not cool public SomeClass() { var someOtherString = "hello"; //cool } } If someString is initialised then it is obviously a string just like someOtherString. Why is there one rule for local variables and another for globals?

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  • how to make variables in pre_controller hooks global to all controllers?

    - by ajsie
    in my pre_controller hook i have this code for doctrine: $manager = Doctrine_Manager::getInstance(); $conn = Doctrine_Manager::connection($db[$active_group][‘dsn’]); then in my controller i have this code to use doctrine connection i’ve created: $conn-export-createTable(‘test’, array(‘name’ = array(‘type’ = ‘string’))); $conn-execute(‘INSERT INTO test (name) VALUES (?)’, array(‘jwage’)); but $conn is undefined so it wont work. if i put the code in the pre_controller hook it will work. how can i make variables i declare in hooks available for all controllers so that i dont have to create a new connection all the time?

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  • QLocale, what is the scope of the global QLocale::setDefault()?

    - by ALoopingIcon
    Problem: I have a QT based multiplatform (win,mac,*nix) application that parses ascii files containing decimal numbers. parsing is done using a variety of different code pieces that use anything from qt string stuff, c++ stdin, oldstyle scanf, etc. ascii files have always the '.' (dot) as separated decimal (e.g. in the file to be parsed 1/10 is written 0.1 as standard in many countries). people using the application within a OS localized for using comma separated decimal encounter a lot of problems (e.g. for french users scanf expect to find 0,1 as a valid textual representation of 1/10 and if they find 0.1 scanf will parse it as 0) How can I be sure that the OS Locale indication of how decimal point has to be written is always ignored? Is it safe assuming that adding QLocale::setDefault(QLocale(QLocale::English,QLocale::UnitedStates)); is enough to get rid of all these problems? Any suggestion for portable ways of setting the locale globally?

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  • systemstate dump ??

    - by JaneZhang(???)
            ???????????????hang????,????????systemstate dump?????????,?????,????????,???????????????,????systemstate dump?????????????       ??????,????????systemstate dump, ?????“WAITED TOO LONG FOR A ROW CACHE ENQUEUE LOCK”?        systemstate dump???????????,??????:??????,???????,????dump????????,???????M????)1. ?sysdba???????:$sqlplus / as sysdba??$sqlplus -prelim / as sysdba <==??????????hang?????SQL>oradebug setmypidSQL>oradebug unlimit;SQL>oradebug dump systemstate 266;?1~2??SQL>oradebug dump systemstate 266;?1~2??SQL>oradebug dump systemstate 266;SQL>oradebug tracefile_name;==>????????2. ????systemstate dump,??????hang analyze??????????????????$sqlplus / as sysdba??$sqlplus -prelim / as sysdba <==??????????hang?????SQL>oradebug setmypidSQL>oradebug unlimit;SQL>oradebug dump hanganalyze 3?1~2??SQL>oradebug dump hanganalyze 3?1~2??SQL>oradebug dump hanganalyze 3SQL>oradebug tracefile_name;==>??????????RAC???,????????????systemstate dump,???????????(?????????):$sqlplus / as sysdba??$sqlplus -prelim / as sysdba <==??????????hang?????SQL>oradebug setmypidSQL>oradebug unlimitSQL>oradebug -g all dump systemstate 266  <==-g all ??????????dump?1~2??SQL>oradebug -g all dump systemstate 266?1~2??SQL>oradebug -g all dump systemstate 266?RAC???hang analyze:SQL>oradebug setmypidSQL>oradebug unlimitSQL>oradebug -g all hanganalyze 3?1~2??SQL>oradebug -g all hanganalyze 3?1~2??SQL>oradebug -g all hanganalyze 3?????????????????systemstate dump,?????????????backgroud_dump_dest??diag trace???????????????????????????,?????hang?,?????systemstate dump?????:10:   dump11:   dump + global cache of RAC256: short stack (????)258: dump(???lock element) + short stack (????)266: 256+10 -->short stack+ dump267: 256+11 -->short stack+ dump + global cache of RAClevel 11? 267? dump global cache, ??????trace ??,??????????????,????????,???266,??????dump?????????,????????????????????short stack????,???????,??2000???,??????30??????????,????level 10 ?? level 258, level 258 ? level 10????short short stack, ??level 10?????lock element data.?????systemstate dump???,??????level?????:??????37???:-rw-r----- 1 oracle oinstall    72721 Aug 31 21:50 rac10g2_ora_31092.trc==>256 (short stack, ????2K)-rw-r----- 1 oracle oinstall  2724863 Aug 31 21:52 rac10g2_ora_31654.trc==>10    (dump,????72K )-rw-r----- 1 oracle oinstall  2731935 Aug 31 21:53 rac10g2_ora_32214.trc==>266 (dump + short stack ,????72K)RAC:-rw-r----- 1 oracle oinstall 55873057 Aug 31 21:49 rac10g2_ora_30658.trc ==>11   (dump+global cache,????1.4M)-rw-r----- 1 oracle oinstall 55879249 Aug 31 21:48 rac10g2_ora_28615.trc ==>267 (dump+global cache+short stack,????1.4M) ??,??????dump global cache(level 11?267,???????????????)??????????,?????????systemstate dump ??

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  • How do I fix my Unit Test to have global access to everything?

    - by SLC
    Usually when you add one (in Visual Basic), it pops up a message asking if you want to enable an option that lets the test access things like private methods etc. However, I am editing a solution that does not have this enabled. I'd like to enable it so my unit tests will work, but I can't find the setting. Can anyone tell me how to enable it after the project has been created?

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  • Local Variables take 7x longer to access than global variables?

    - by ItzWarty
    I was trying to benchmark the gain/loss of "caching" math.floor, in hopes that I could make calls faster. Here was the test: <html> <head> <script> window.onload = function() { var startTime = new Date().getTime(); var k = 0; for(var i = 0; i < 1000000; i++) k += Math.floor(9.99); var mathFloorTime = new Date().getTime() - startTime; startTime = new Date().getTime(); window.mfloor = Math.floor; k = 0; for(var i = 0; i < 1000000; i++) k += window.mfloor(9.99); var globalFloorTime = new Date().getTime() - startTime; startTime = new Date().getTime(); var mfloor = Math.floor; k = 0; for(var i = 0; i < 1000000; i++) k += mfloor(9.99); var localFloorTime = new Date().getTime() - startTime; document.getElementById("MathResult").innerHTML = mathFloorTime; document.getElementById("globalResult").innerHTML = globalFloorTime; document.getElementById("localResult").innerHTML = localFloorTime; }; </script> </head> <body> Math.floor: <span id="MathResult"></span>ms <br /> var mathfloor: <span id="globalResult"></span>ms <br /> window.mathfloor: <span id="localResult"></span>ms <br /> </body> </html> My results from the test: [Chromium 5.0.308.0]: Math.floor: 49ms var mathfloor: 271ms window.mathfloor: 40ms [IE 8.0.6001.18702] Math.floor: 703ms var mathfloor: 9890ms [LOL!] window.mathfloor: 375ms [Firefox [Minefield] 3.7a4pre] Math.floor: 42ms var mathfloor: 2257ms window.mathfloor: 60ms [Safari 4.0.4[531.21.10] ] Math.floor: 92ms var mathfloor: 289ms window.mathfloor: 90ms [Opera 10.10 build 1893] Math.floor: 500ms var mathfloor: 843ms window.mathfloor: 360ms [Konqueror 4.3.90 [KDE 4.3.90 [KDE 4.4 RC1]]] Math.floor: 453ms var mathfloor: 563ms window.mathfloor: 312ms The variance is random, of course, but for the most part In all cases [this shows time taken]: [takes longer] mathfloor Math.floor window.mathfloor [is faster] Why is this? In my projects i've been using var mfloor = Math.floor, and according to my not-so-amazing benchmarks, my efforts to "optimize" actually slowed down the script by ALOT... Is there any other way to make my code more "efficient"...? I'm at the stage where i basically need to optimize, so no, this isn't "premature optimization"...

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  • does a git repository have its own local value for core.autocrlf that overrides the global one?

    - by Warren P
    As per this question, I understand that core.autocrlf=true in git will cause CRLF to LF translations. However when I type : git config core.autocrlf I see: false However, when I stage modified files that are already in the repo, I still get these warnings: Warning: CRLF will be replaced by LF in File1.X. The file will have its original line endings in your working directory. My guess is that the repo copy of the file is already set to "autocrlf=true". Questions: A. How do I query whether a file or git repo is already forcing AutoCrlf? B. How do I turn it autocrlf off?

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  • How to prevent VC++ 9 linker from linking unnecessary global variables?

    - by sharptooth
    I'm playing with function-level linking in VC++. I've enabled /OPT:REF and /OPT:ICF and the linker is happy to eliminate all unused functions. Not so with variables. The following code is to demonstrate the problem only, I fully understand that actually having code structured that way is suboptimal. //A.cpp SomeType variable1; //B.cpp extern SomeType variable1; SomeType variable2; class ClassInB { //actually uses variable1 }; //C.cpp extern SomeType variable2; class ClassInC { //actually uses variable2; }; All those files are compiled into a static lib. The consumer project only uses ClassInC and links to the static library. Now comes the VC++ 9 linker. First the linker sees that C.obj references variable2 and includes B.obj. B.obj references variable1, so it includes A.obj. Then the unreferenced stuff elimination phase starts. It removes all functions in A.obj and B.obj, but not the variables. Both variable and variable2 are preserved together with their static initializers and deinitializers. That inflates the image size and introduces a delay for running the initializers and deinitializes. The code above is oversimplified, in actual code I really can't move variable2 into C.cpp easily. I could put it into a separate .cpp file, but that looks really dumb. Is there any better option to resolve the problem with Visual C++ 9?

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  • Is this the right way to have "global" parameters for my servlets?

    - by Geo
    If I have: <context-param> <param-name>SomeParam</param-name> <param-value>SomeValue</param-value> </context-param> in my web.xml, is this the servlet way of specifying options ( like in the way a config file is used ) , or am I doing something wrong? I know about init-param that can be specified for a servlet, but I'd like o make sure some values are the same for all the servlets.

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