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  • No speed-up with useless printf's using OpenMP

    - by t2k32316
    I just wrote my first OpenMP program that parallelizes a simple for loop. I ran the code on my dual core machine and saw some speed up when going from 1 thread to 2 threads. However, I ran the same code on a school linux server and saw no speed-up. After trying different things, I finally realized that removing some useless printf statements caused the code to have significant speed-up. Below is the main part of the code that I parallelized: #pragma omp parallel for private(i) for(i = 2; i <= n; i++) { printf("useless statement"); prime[i-2] = is_prime(i); } I guess that the implementation of printf has significant overhead that OpenMP must be duplicating with each thread. What causes this overhead and why can OpenMP not overcome it?

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  • Legal uses of setjmp and GCC

    - by Chris Lutz
    Using GCC (4.0 for me), is this legal: if(__builtin_expect(setjmp(buf) != 0, 1)) { // handle error } else { // do action } I found a discussion saying it caused a problem for GCC back in 2003, but I would imagine that they would have fixed it by now. The C standard says that it's illegal to use setjmp unless it's one of four conditions, the relevant one being this: one operand of a relational or equality operator with the other operand an integer constant expression, with the resulting expression being the entire controlling expression of a selection or iteration statement; But if this is a GCC extension, can I guarantee that it will work under for GCC, since it's already nonstandard functionality? I tested it and it seemed to work, though I don't know how much testing I'd have to do to actually break it. (I'm hiding the call to __builtin_expect behind a macro, which is defined as a no-op for non-GCC, so it would be perfectly legal for other compilers.)

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  • SQL Server 2000 incorrect message: duplicate key with unique index

    - by iar
    Database server: SQL Server 2000 - 8.00.760 - SP3 - Standard Edition I have a table with 5 columns, in which I want to add a large (300.000) number of records. There is a unique index on the combination of two columns. If I add the records with this unique index in place, SQL Server gives this error message: Msg 2601, Level 14, State 3, Line 1 Cannot insert duplicate key row in object 'TESTTABLE' with unique index 'test'. The statement has been terminated. (0 row(s) affected) However, if I delete the unique index and then add the records, I do not get any error when I create this unique index afterwards.

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  • JavaScript: Reference a functions local scope as an object

    - by eBusiness
    When I call a function, a local scope is erected for that call. Is there any way to directly reference that scope as an object? Just like window is a reference for the global scope object. Example: function test(foo){ var bar=1 //Now, can I access the object containing foo, bar, arguments and anything //else within the local scope like this: magicIdentifier.bar } Alternately, does anyone have a complete list of what is in the global scope on top of custom variables? Background: I'm trying to get down to a way of completely shifting to global scope from within a function call, the with statement is a joke, call works a little better, but it still breaks for anything declared in function scope but not in global scope, therefore I would declare these few cases in global scope, but that requires me to know what they are. The IE function execScript makes a complete shift, but that only solves the problem for IE. Note: To anyone loading JavaScript dynamically, setTimeout(code,1) is a simple effective hack to achieve global scope, but it will not execute immediately.

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  • C# Find and Replace RegEx question

    - by fraXis
    Hello, I am starting to get a grip on RegEx thanks to all the great help here on SO with my other questions. But I am still suck on this one: My code is: StreamReader reader = new StreamReader(fDialog.FileName.ToString()); string content = reader.ReadToEnd(); reader.Close(); I am reading in a text file and I want to search for this text and change it (the X and Y value always follow each other in my text file): X17.8Y-1. But this text can also be X16.1Y2.3 (the values will always be different after X and Y) I want to change it to this X17.8Y-1.G54 or X(value)Y(value)G54 My RegEx statement follows but it is not working. content = Regex.Replace(content, @"(X(?:\d*\.)?\d+)*(Y(?:\d*\.)?\d+)", "$1$2G54"); Can someone please modify it for me so it works and will search for X(wildcard) Y(Wildcard) and replace it with X(value)Y(value)G54? Thanks, Shawn

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  • Reference methods defined in one JScript file from another JScript

    - by Thomas Svensen
    I am writing some server-side scripts using jscript and WSH. The scripts are getting quite long, and some common functions and variables would fit better in a general library script which I included in my various script instances. But, I cannot find a way reference one JScript file from another. For a moment, I though reading the file contents and passing it to "eval()" could work. But, as it says on MSDN: "Note that new variables or types defined in the eval statement are not visible to the enclosing program." (http://msdn.microsoft.com/en-us/library/b51a45x6.aspx) Is there any way to include/refence a JScript from another one?

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  • How can I transfer output that appears on the console and format it so that it appears on a web page

    - by lojayna
    package collabsoft.backlog_reports.c4; import java.sql.CallableStatement; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.Statement; //import collabsoft.backlog_reports.c4.Report; public class Report { private Connection con; public Report(){ connectUsingJDBC(); } public static void main(String args[]){ Report dc = new Report(); dc.reviewMeeting(6, 8, 10); dc.createReport("dede",100); //dc.viewReport(100); // dc.custRent(3344,123,22,11-11-2009); } /** the following method is used to connect to the database **/ public void connectUsingJDBC() { // This is the name of the ODBC data source String dataSourceName = "Simple_DB"; try { // loading the driver in the memory Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // This is the connection URL String dbURL = "jdbc:odbc:" + dataSourceName; con = DriverManager.getConnection("jdbc:mysql://localhost:3306/Collabsoft","root",""); // This line is used to print the name of the driver and it would throw an exception if a problem occured System.out.println("User connected using driver: " + con.getMetaData().getDriverName()); //Addcustomer(con,1111,"aaa","aaa","aa","aam","111","2222","111"); //rentedMovies(con); //executePreparedStatement(con); //executeCallableStatement(con); //executeBatch(con); } catch (Exception e) { e.printStackTrace(); } } /** *this code is to link the SQL code with the java for the task *as an admin I should be able to create a report of a review meeting including notes, tasks and users *i will take the task id and user id and note id that will be needed to be added in the review *meeting report and i will display the information related to these ida **/ public void reviewMeeting(int taskID, int userID, int noteID)// law el proc bt return table { try{ CallableStatement callableStatement = con.prepareCall("{CALL report_review_meeting(?,?,?)}"); callableStatement.setInt(1,taskID); callableStatement.setInt(2,userID); callableStatement.setInt(3,noteID); ResultSet resultSet = callableStatement.executeQuery(); // or executeupdate() or updateQuery ResultSetMetaData rsm = resultSet.getMetaData(); int numOfColumns = rsm.getColumnCount(); System.out.println("lojayna"); while (resultSet.next()) { System.out.println("New Row:"); for (int i = 1; i <= numOfColumns; i++) System.out.print(rsm.getColumnName(i) + ": " + resultSet.getObject(i) + " "); System.out.println(); } } catch(Exception e) { System.out.println("E"); } } ////////////////////////////////// ///////////////////////////////// public void allproject(int projID)// law el proc bt return table { try{ CallableStatement callableStatement = con.prepareCall("{CALL all_project(?)}"); callableStatement.setInt(1,projID); //callableStatement.setInt(2,userID); //callableStatement.setInt(3,noteID); ResultSet resultSet = callableStatement.executeQuery(); // or executeupdate() or updateQuery ResultSetMetaData rsm = resultSet.getMetaData(); int numOfColumns = rsm.getColumnCount(); System.out.println("lojayna"); while (resultSet.next()) { System.out.println("New Row:"); for (int i = 1; i <= numOfColumns; i++) System.out.print(rsm.getColumnName(i) + ": " + resultSet.getObject(i) + " "); System.out.println(); } } catch(Exception e) { System.out.println("E"); } } /////////////////////////////// /** * here i take the event id and i take a string report and then * i relate the report with the event **/ public void createReport(String report,int E_ID )// law el proc bt return table { try{ Statement st = con.createStatement(); st.executeUpdate("UPDATE e_vent SET e_vent.report=report WHERE e_vent.E_ID= E_ID;"); /* CallableStatement callableStatement = con.prepareCall("{CALL Create_report(?,?)}"); callableStatement.setString(1,report); callableStatement.setInt(2,E_ID); ResultSet resultSet = callableStatement.executeQuery(); // or executeupdate() or updateQuery ResultSetMetaData rsm = resultSet.getMetaData(); int numOfColumns = rsm.getColumnCount(); System.out.println("lojayna"); while (resultSet.next()) { System.out.println("New Row:"); for (int i = 1; i <= numOfColumns; i++) System.out.print(rsm.getColumnName(i) + ": " + resultSet.getObject(i) + " "); System.out.println(); }*/ } catch(Exception e) { System.out.println("E"); System.out.println(e); } } /** *in the following method i view the report of the event having the ID eventID **/ public void viewReport(int eventID)// law el proc bt return table { try{ CallableStatement callableStatement = con.prepareCall("{CALL view_report(?)}"); callableStatement.setInt(1,eventID); ResultSet resultSet = callableStatement.executeQuery(); // or executeupdate() or updateQuery ResultSetMetaData rsm = resultSet.getMetaData(); int numOfColumns = rsm.getColumnCount(); System.out.println("lojayna"); while (resultSet.next()) { System.out.println("New Row:"); for (int i = 1; i <= numOfColumns; i++) System.out.print(rsm.getColumnName(i) + ": " + resultSet.getObject(i) + " "); System.out.println(); } } catch(Exception e) { System.out.println("E"); } } } // the result of these methods is being showed on the console , i am using WIcket and i want it 2 be showed on the web how is that done ?!

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  • SqlDateTime overflow thrown by Typed DataSet Insert

    - by end-user
    I'm using a Typed DataSet with an Insert statement; I have a table that has a smalldatetime field defined to accept null values. When I insert from a .NET 2.0 FormView, I get a "SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM." Now, I've read this post, and the parameter as sent to the class constructor is defined as global::System.Nullable<global::System.DateTime> DoB So, it looks like it should accept a Nullable obj. Additionally, the generated code is testing the value sent. if ((DoB.HasValue == true)) { command.Parameters[6].Value = ((System.DateTime)(DoB.Value)); } else { command.Parameters[6].Value = global::System.DBNull.Value; } Specifically, the error is occurring when generated SqlClient.SqlCommand.ExecuteScalar() runs: try { returnValue = command.ExecuteScalar(); } So, I guess my question is: how do I use a Typed DataSet to set a blank value (passed from a FormView on CommandName=Insert) to a null in a database?

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  • c# reading integer fields from database, returning empty string when reading integer type field

    - by arnoldino
    what is wrong with this code? field="id"; table="MInvMonth"; condition="machine_id=37"; public static String getConditionedField(String field, String table, String condition) try { if (cmd == null) getConnection(); cmd.CommandText = "Select " + field + " from " + table + " where " + condition; SQLiteDataReader reader = cmd.ExecuteReader(); if (reader.HasRows==true) { reader.Read(); string s = reader[0].ToString(); // return first element reader.Close(); return s; } reader.Close(); return null; } catch (Exception e) { MessageBox.Show("Caught exception: " + e.Message+"|"+cmd.CommandText); return null; } I checked the sql statement, it turns the right value. why can't I read it? the returnvalue is "".

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  • Custom Events in pygame

    - by SapphireSun
    Hello everyone, I'm having trouble getting my custom events to fire. My regular events work fine, but I guess I'm doing something wrong. Here is the relevant code: evt = pygame.event.Event(gui.INFOEVENT, {'time':time,'freq':freq,'db':db}) print "POSTING", evt pygame.event.post(evt) .... Later .... for event in pygame.event.get(): print "GOT", event if event.type == pygame.QUIT: sys.exit() dispatcher.dispatch(event) gui.INFOEVENT = 101 by the way. The POSTING print statement fires, but the GOT one never shows my event. Thanks!

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  • ExecuteStoreQuery passing parameter to StoreProcedure

    - by KDM
    Could someone help with passing a parameter object into my ExecuteStoreQuery. Im executing this from my Entities db and then creating my procedure on the fly is this possible and is my SQL correct. i need to pass a Id paramater value into my sql statement var node = db.ExecuteStoreQuery<Node>(@" @Id int // not sure about this declaration for paramater with c as ( select Id, Name, ParentId,[0] as level from Department d union all select d.Id, d.Name, d.ParentId, [level] + 1 from Department d join c on d.ParentId = c.Id) select * from c where c.Id = @Id" "Departments", System.Data.Objects.MergeOption.NoTracking, new object{ Id: department.Id} // <--paramater object not working);

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  • Linq2SQL using Update StoredProcedure

    - by PeterTheNiceGuy
    We use queries generated by Linq for data retrieval but for INSERT and UPDATE we do not allow generated SQL, but restrict to the use of stored procedures. I connected the Update and the Insert behaviour in the DBML to the stored procedures. The procedures are called, the data gets inserted/updated = all if fine, except in the case of optimistic concurrency. If a record was changed between retrieval and update, the update should fail. When Linq generates the Update statement itself, it throws a ChangeConflictException as expected, but using the stored procedure no Exception is thrown. Thanks a lot for any help on this!

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  • Gracefully exiting from thread in Ruby

    - by jasonbogd
    Hi, I am trying out Mongrel and using the following code: require 'rubygems' require 'mongrel' class SimpleHandler < Mongrel::HttpHandler def process(request, response) response.start(200) do |head, out| head["Content-Type"] = "text/plain" out.write("Hello World!\n") end end end h = Mongrel::HttpServer.new("0.0.0.0", "3000") h.register("/test", SimpleHandler.new) puts "Press Control-C to exit" h.run.join trap("INT") do puts "Exiting..." end Basically, this just prints out "Hello World!" when I go to localhost:3000/test. It works fine, and I can close the program with Control-C. But when I press Control-C, this gets outputted: my_web_server.rb:17:in `join': Interrupt from my_web_server.rb:17 So I tried putting that trap("INT") statement at the end, but it isn't getting called. Solution? Thanks.

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  • How would I do this in SQL?

    - by bergyman
    Let's say I have the following tables: PartyRelationship EffectiveDatedAttributes PartyRelationship contains a varchar column called class. EffectiveDatedAttributes contains a foreign key to PartyRelationship called ProductAuthorization. If I run this: select unique eda.productauthorization from effectivedatedattributes eda inner join partyrelationship pr on eda.productauthorization = pr.ID where pr.class = 'com.pmc.model.bind.ProductAuthorization' it returns a list of ProductAuthorization IDs. I need to take this list of IDs and insert a new row into EffectiveDatedAttributes for every ID, containing the ID as well as some other data. How would I iterate over the returned IDs from the previous select statement in order to do this?

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  • Accessing Active Directory Role Membership through LDAP using SQL Server 2005

    - by David Neale
    I would like to get a list of Active Directory users along with the security groups they are members of using SQL Server 2005 linked servers. I have the query working to retrieve records but I'm not sure how to access the memberOf attribute (it is a multi-value LDAP attribute). I have this temporary to store the information: DROP TABLE #ADUSERGROUPS CREATE TABLE #ADUSERGROUPS ( sAMAccountName varchar(30), UserGroup varchar(50) ) Each group/user association should be one row. This is my SELECT statement: SELECT sAMAccountName,memberOf FROM OpenQuery(ADSI, '<LDAP://hqdc04/DC=nt,DC=avs>; (&(objectClass=User)(sAMAccountName=9695)(sn=*)(mail=*)(userAccountControl=512)); sAMAccountName,memberOf;subtree') I get this error msg: OLE DB error trace [OLE/DB Provider 'ADSDSOObject' IRowset::GetData returned 0x40eda: Data status returned from the provider: [COLUMN_NAME=memberOf STATUS=DBSTATUS_E_CANTCONVERTVALUE], [COLUMN_NAME=sAMAccountName STATUS=DBSTATUS_S_OK]]. Msg 7346, Level 16, State 2, Line 2 Could not get the data of the row from the OLE DB provider 'ADSDSOObject'. Could not convert the data value due to reasons other than sign mismatch or overflow.

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  • javascript form validation in rails?

    - by Elliot
    Hey guys, I was wondering how to go about form validation in rails. Specifically, here is what I'm trying to do: The form lets the user select an item from a drop down menu, and then enter a number along with it. Using RJS, the record instantly shows up in a table below the form. Resetting the form with AJAX isn't a problem. The issue is, I don't want the person to be able to select the same item from that drop down menu twice (in 1 day at least). Without using ajax, this isn't a problem (as I have a function for the select statement currently), but now that the page isn't reloading, I need a way to make sure people cant add the same item twice in one day. That said, is there a way to use some javascript/ajax validation to make sure the same record hasn't been submitted during that day, before a duplicate can be created? Thanks in advance! Elliot

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  • Incorrect decrement of the reference count

    - by idober
    I have the following problem: In one flow of the execution I use alloc, and on the other flow, alloc is not needed. At the end of the if statement, in any case, I release the object. When I do 'build and Analize' I get an error: 'Incorrect decrement of the reference count of an object is not owned by the caller'. How to solve that? UIImage *image; int RandomIndex = arc4random() % 10; if (RandomIndex<5) { image = [[UIImage alloc] initWithContentsOfFile:@"dd"]; } else { image = [UIImage imageNamed:@"dd"]; } UIImageView *imageLabel =[[UIImageView alloc] initWithImage:image]; [image release]; [imageLabel release];

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  • dismissModalViewControllerAnimated: crashes in Simulator but not on phone

    - by Jon
    I'm doing the following: [self.parentViewController dismissModalViewControllerAnimated:YES] This code fails using the Simulator but works with no issues on the phone itself. The Simulator's console shows no erros. I used NSLog statements to pinpoint this line of code as the culprit. When running on the phone, however, the console(windoworganizer) shows that the above code is executed and the application proceeds forward with no problem. When running the code in debugger, the following statement appears at the bottom of the Xcode debug window: GDB: Data Formatters temporarily unavailable, will re-try after a 'continue'. (Not safe to call dlopen at this time.) Then a window dispalys stating: Loading 43672 stack frames. (that sounds bad) In the debug window the following line appears numerous times: [UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] Without getting too deep into my code, does anyone know about or have experience with this type of condition? Thanks

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  • Modifying an old Windows program not to call exit after a keypress without source access

    - by rustyn2
    I have an older C++ Windows program that I've been asked to get run in a kiosk style environment for a student project. From the main menu, hitting ESC will exit the program, which is undesirable. In ye olden days I would have trapped the keyboard interrupt or whatever and dug around to NOOP whatever JMP or CALL was getting referenced in the case statement that likely decides all that, but on Windows everything goes through various registered event handlers, and I haven't done any windows internals work in about 10 years. Is there a good tool to breakpoint a program on certain WM_EVENT (WM_KEYDOWN being a prime target) messages or similar, so that I can narrow down where in the executable the check is made? I'm currently stepping back from various potential system calls made before the various thread cleanups and final exit calls but it seems like there has to be a better way to do this that I'm forgetting.

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  • XPath does not pass brower compatibility checks in InfoPath 2007

    - by drivendevelopment
    Why do the targetField attributes below fail the browser compatibility checker in InfoPath 2007. Is there another way to write the statement so that it will work on Browser Enabled forms? <xsf:ruleSets> <xsf:ruleSet name="ruleSet_1"> <xsf:rule caption="Rule 1" isEnabled="yes"> <xsf:assignmentAction targetField="my:group1/my:group2[1]/my:field3" expression="my:field1"></xsf:assignmentAction> </xsf:rule> <xsf:rule caption="Rule 2" isEnabled="yes"> <xsf:assignmentAction targetField="my:group1/my:group2[2]/my:field3" expression="my:field2"></xsf:assignmentAction> </xsf:rule> </xsf:ruleSet> </xsf:ruleSets>

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  • Rails request forgery protection settings

    - by Vitaly
    Hey, please help a newbie in Rails :) I have protect_from_forgery call (which is given by default) with no attributes in my ApplicationController class. Basically here's the code: class ApplicationController < ActionController::Base helper :all # include all helpers, all the time protect_from_forgery helper_method :current_user_session, :current_user filter_parameter_logging :password, :password_confirmation What I assume it should do is: it should prevent any POST requests without correct authenticity_token. But when I send post request with jQuery like the one below, it works fine (there's update statement that is executed in the database)! $.post($(this).attr("href"), { _method: "PUT", data: { test: true } }); I see in console that there's no authenticity_token among sent parameters, but request is still considered valid. Why is that?

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  • netsh http add urlacl problem

    - by BadCat914
    I'm trying to set up some ports from a WIX installer. For WinXP we use httpcfg in a custom action and this works fine. For Win7, we're trying: netsh http add urlacl url=http://127.0.0.1/8346/ user="NT AUTHORITY\Authenticated Users" sddl="D:(A;;GX;;;AU)" The WIX installer correctly executes this statement and sets up the ports - FOR THE ADMINISTRATOR who runs the .msi. Users with lesser priviliges cannot access these ports. I need to set it up for all users on the machine, but I've tried about everything I can think of with no luck. Something I find odd is that the Admin user can see the assigned ports using netstat -a, but they do not appear at all using netsh http show urlacl...is that an indicator of something wrong?

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  • how does ` cat << EOF` work in bash?

    - by hasen j
    I needed to write a script to enter multi-line input to a program (psql) After a big of googling, I found the following syntax works: cat << EOF | psql ---params BEGIN; `pg_dump ----something` update table .... statement ...; END; EOF This correctly concatenates all these strings and passes the result as an input to psql. but I have no idea how/why it works, can some one please explain? I'm referring mainly to cat << EOF, I know > outputs to a file, >> appends to a file, < reads input from file. What does << exactly do? And is there a man page for it?

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  • Time to ignore IDisposable?

    - by Mystagogue
    Certainly we should call Dipose() on IDisposable objects as soon as we don't need them (which is often merely the scope of a "using" statement). If we don't take that precaution then bad things, from subtle to show-stopping, might happen. But what about "the last moment" before process termination? If your IDisposables have not been explicitly disposed by that point in time, isn't it true that it no longer matters? I ask because unmanaged resources, beneath the CLR, are represented by kernel objects - and the win32 process termination will free all unmanaged resources / kernel objects anyway. Said differently, no resources will remain "leaked" after the process terminates (regardless if Dispose() was called on lingering IDisposables). Can anyone think of a case where process termination would still leave a leaked resource, simply because Dispose() was not explicitly called on one or more IDisposables? Please do not misunderstand this question: I am not trying to justify ignoring IDisposables. The question is just technical-theoretical.

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  • Column locking in innodb?

    - by ming yeow
    I know this sounds weird, but apparently one of my columns is locked. select * from table where type_id = 1 and updated_at < '2010-03-14' limit 1; select * from table where type_id = 3 and updated_at < '2010-03-14' limit 10; the first one would not finish running even in a few hours, while the second one completes smoothly. the only difference is the type_id between the 2 queries. a bit of background, the first statement screwed up before which i had to kill manually. Thanks in advance for your help - i have an urgent data job to finish, and this problem is driving me crazy

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