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• Adding a user to the local Administrator group using powershell

  - by Rihan Meij

  Hi I would like to use powershell to add a spesific user to the local administrator group on a machine. I would be running the powershell script in the context of a user that has Administration rights on the local machine. Thanks Rihan

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• Editing the registry entry to have Citrix call the local install of an application

  - by jrembold

  We use Citrix to access an app (APP1) remotely. As it currently stands, when APP1 needs to do a merge document, it calls a session of another app (APP2) from the Citrix server. However, due to latency issues, we now want APP1 to call a local version of APP2. This is controlled in the registry entry for APP1. I'm wondering what kind of path entry would need to be made so that APP1 would call the local APP2 while following the rules of the Citrix profile.

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• Upload database backup from mysql to Amazon S3 or Glacier without creating local file

  - by Rubem Azenha

  Is there a tool that makes possible to backup a Mysql database to Amazon S3 or Amazon Glacier without having o create a local file with the database contents? Something like that: mysqldump -u root -ppass -h host --all-databases | magical-s3-tool s3-bucket backup-yyyy-mm-dd.sql This magical tool would use the pipe data and transfer the backup data directly to S3, without creating a local file.

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• Export local security policy

  - by Jim B

  I am trying to export the local security policy on a number of servers into a template file which I can then import into a group policy. I cna do this manually without issue but I have been unsuccesssful in finding a way to script this process. Is is possible to script the creation of the export of local security policy?

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• WinXP environment variable for "local setting" folder

  - by Stan

  there's a %appdata% variable equals to C:\Documents and Settings\<username>\Application Data\. I wonder if there's a variable for either C:\Documents and Settings\<username>\Local Settings\ C:\Documents and Settings\<username>\Local Settings\Application Data\ Thanks.

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• Giving Users Full Control of their local drives?

  - by Ian Bowes

  Is there a way to give a domain user full control of their local drives at the Group Policy end? Specifically, my IT Manager wants the following: a) Desktop control allowed b) Full access to local hard drives c) Software Installation NOT Allowed d) Existing software Updates Allowed e) Install additional printers Allowed At the moment, our Win2003 setup does not allow users to do a,b,d,e - I wondered if there was a way using GP to enable these?

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• Remote edit with local editor (Linux)

  - by Eisaj

  Hello, I have a server I can ssh into, and I am also running Ubuntu. How do I edit this remote file using any program I have installed on my local Ubuntu, without copying it to local, editing it, and copying it back? Thanks!

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• WPF Databinding thread safety?

  - by Petoj

  Well lets say i have an object that i databind to, it implements INotifyPropertyChanged to tell the GUI when a value has changed... if i trigger this from a different thread than the GUI thread how would wpf behave? and will it make sure that it gets the value of the property from memory and not the cpu cache? more or less im asking if wpf does lock() on the object containing the property...

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• Java Inter Process communication and Inter Thread communication ?

  - by JavaUser

  Hi, First , what is the difference between Thread and a Process in Java context? and How Inter Process communication and Inter Thread communication is acheived in Java? Please point me real time examples. Thx

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• question about STL thread-safe and STL debugging

  - by skydoor

  I have two questions about STL 1) why STL is not thread-safe? Is there any structure that is thread-safe? 2) How to debug STL using GDB? In GDB, how can I print a vector?

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• SerialPort ReadLine() after Thread.Sleep() goes crazy

  - by Mat

  Hi everybody, I've been fighting with this issue for a day and I can't find answer for it. I am trying to read data from GPS device trough COM port in Compact Framework C#. I am using SerialPort class (actually my own ComPort class boxing SerialPort, but it adds only two fields I need, nothing special). Anyway.. I am running while loop in a separate thread which reads line from the port, analyze NMEA data, print them, catch all exceptions and then I Sleep(200) the thread, cause I need CPU for other threads... Without Sleep it works fine, but uses 100% CPU.. When I dont use Sleep after few minutes the output from COM port looks like this: GPGSA,A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F GSA,A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F A,A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F ,18,12,271,24,24,05,020,24,14,04,326,25,11,03,023,*76 A,3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F 3,09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F 09,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F ,12,22,17,15,27,,,,,,,2.6,1.6,2.1*3F as you can see the same message is read few times but cut. I wonder what I'm doing wrong... My port configuration: port.ReadBufferSize = 4096; port.BaudRate = 4800; port.DataBits = 8; port.Parity = Parity.None; port.StopBits = StopBits.One; port.NewLine = "\r\n"; port.ReadTimeout = 1000; port.ReceivedBytesThreshold = 100000; And my reading function: private void processGps(){ while (!closing) { //reconnect if needed try { string sentence = port.ReadLine(); //here print the sentence //analyze the sentence (this takes some time 50-100ms) } catch (TimeoutException) { Thread.Sleep(0); } catch (IOException ioex) { //handling IO exception (some info on the screen) } Thread.Sleep(200); } } There is some more stuff in this function like reconnection if the device is lost etc.. but it is not called when the GPS is connected properly.. I was trying port.DiscardInBuffer(); after some blocks of code (in TimeoutException, after read..) Did anyone had similar problem? I really dont know what I'm doing wrong.. The only way to get rig of it is removing the last Sleep... Thanks in advance! Best Regards, Mat

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• mono --aot with MinGW: unknown pseudo-op: `.local'

  - by Jared Updike

  Can I user mono's AOT feature to natively "pre-compile" .NET DLLs (and or EXEs) to make them harder to reverse engineer? If so, how do I get mono/AOT working in Windows 7? (I'm running x64 but the app is targeting x86 explicitly.) I just installed Mono 2.6.3 and MinGW 5.1.6 and I'm trying to AOT compile an exe (or a dll, it doesn't matter). I get screens and screens of error messages: C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:533: Error: junk at end of line, first unrecognized character is `H' C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:539: Error: unknown pseudo-op: `.local' C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:546: Warning: .size pseudo-op used outside of .def/.endef ignored. C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:546: Error: junk at end of line, first unrecognized character is `H' I can open the generated assembly code but I have no idea why the assembler chokes on it: .size HappyForms_TextForm__ctor_string_string_string_bool,.-HappyForms_TextForm__ctor_string_string_string_bool (533) _.Lme_a: .Lme_a: .balign 16 _.Lm_b: .Lm_b: .local HappyForms_TextForm_get_InputValue (539) _HappyForms_TextForm_get_InputValue: HappyForms_TextForm_get_InputValue: .byte 85,139,236,131,236,8,139,69,8,139,128,216,2,0,0,131,236,12,80,139,0,144,144,144,255,144,200,2,0,0,131,196 .byte 16,201,195 .size HappyForms_TextForm_get_InputValue,.-HappyForms_TextForm_get_InputValue (546) (numbers above in parens are line numbers)

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• Is RegSetValueEx thread safe?

  - by Brent Newbury

  I suspect that RegSetValueEx is thread safe, but would like some confirmation from the community. If called from multiple threads, will there be any side effects? The RegSetValueEx MSDN documentation doesn't mention thread safety at all.

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• WPF How to stop animation from a thread in background worker

  - by toni

  Hi! I have a task that takes a long time. I do it with a background worker thread and before start it, since Do_Work I begin an animation over a label and when task finishes, I stop it in RunWorkerCompleted but I received an error because I try to begin/stop animation in the background thread that is not the owner. How can I do this, I mean to begin/stop animation in the background worker? thanks!

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• Subclassing a window from a thread in c#

  - by user258651

  I'm creating a thread that looks for a window. When it finds the window, it overrides its windowproc, and handles WM_COMMAND and WM_CLOSE. Here's the code that looks for the window and subclasses it: public void DetectFileDialogProc() { Window fileDialog = null; // try to find the dialog twice, with a delay of 500 ms each time for (int attempts = 0; fileDialog == null && attempts < 2; attempts++) { // FindDialogs enumerates all windows of class #32770 via an EnumWindowProc foreach (Window wnd in FindDialogs(500)) { IntPtr parent = NativeMethods.User32.GetParent(wnd.Handle); if (parent != IntPtr.Zero) { // we're looking for a dialog whose parent is a dialog as well Window parentWindow = new Window(parent); if (parentWindow.ClassName == NativeMethods.SystemWindowClasses.Dialog) { fileDialog = wnd; break; } } } } // if we found the dialog if (fileDialog != null) { OldWinProc = NativeMethods.User32.GetWindowLong(fileDialog.Handle, NativeMethods.GWL_WNDPROC); NativeMethods.User32.SetWindowLong(fileDialog.Handle, NativeMethods.GWL_WNDPROC, Marshal.GetFunctionPointerForDelegate(new WindowProc(WndProc)).ToInt32()); } } And the windowproc: public IntPtr WndProc(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam) { lock (this) { if (!handled) { if (msg == NativeMethods.WM_COMMAND || msg == NativeMethods.WM_CLOSE) { // adding to a list. i never access the window via the hwnd from this list, i just treat it as a number _addDescriptor(hWnd); handled = true; } } } return NativeMethods.User32.CallWindowProc(OldWinProc, hWnd, msg, wParam, lParam); } This all works well under normal conditions. But I am seeing two instances of bad behavior in order of badness: If I do not close the dialog within a minute or so, the app crashes. Is this because the thread is getting garbage collected? This would kind of make sense, as far as GC can tell the thread is done? If this is the case, (and I don't know that it is), how can I make the thread stay around as long as the dialog is around? If I immediately close the dialog with the 'X' button (WM_CLOSE) the app crashes. I believe its crashing in the windowproc, but I can't get a breakpoint in there. I'm getting an AccessViolationException, The exception says "Attempted to read or write protected memory. This is often an indication that other memory is corrupt." Its a race condition, but of what I don't know. FYI, I had been reseting the old windowproc once I processed the commands, but that was crashing even more often! Any ideas on how I can solve these issues?

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• How to efficiently save changes made in UI/main thread with Core Data?

  - by Jaanus

  So, there have been several posts here about importing and saving data from an external data source into Core Data. Apple documents a reasonable pattern for this: "import and save on background thread, merge saved objects to main thread." All fine and good. I have a related but different problem: the user is modifying data in the UI and main thread, and thus modifies state of some objects in the managed object context (MOC). I would like to save these changes from time to time. What is a good way to do that? Now, you could say that I could do the same: create a background thread with its own MOC and pass the changed objectID-s there. The catch-22 for me with this is that an object's ID changes when it is saved, and I cannot guarantee the order of things happening. I may end up passing a different objectID into the background thread for the same object, based on whether the object has been previously saved or not, and I don't know if Core Data can resolve this and see that different objectID-s are pointing to the same object and not create duplicates for me. (I could test this, but I'm lazywebbing with this question first.) One thought I had: I could always do MOC saves on a background thread, and queue them up with operationqueue, so that there is always only one save in progress. I would not create a new MOC, I would just use the same MOC as in main thread. Now, this is not thread safe and when someone modifies the MOC in main thread while it is being saved in background thread, the results will probably be catastrophic. But, minus the thread safety, you can see what kind of solution I'd wish for. To be clear, the problem I need to fix is that if I just do the save in main thread, it blocks the UI for an unacceptably long period of time, I want to move the save to background thread. So, questions: what about the reasoning of an object ID changing during saving, and Core Data being able to resolve them to the same object? Would this be the right way of addressing this problem? any other good ways of doing this?

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• signal qt from a non-qt thread, QueuedConnection

  - by lj8888

  hello, I am signaling my Qt GUI thread from a boost::thread, and I am using a Qt::QueuedConnection, connect(src, SIGNAL(signal-signature), dest, SLOT(slot-signature), Qt::QueuedConnection); and still, when I emit the signal my slot does not get called.

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• Number of threads and thread numbers in Grand Central Dispatch

  - by raphgott

  I am using C and Grand Central Dispatch to parallelize some heavy computations. How can I get the number of threads used by GCD? Also is it possible to know on which thread a piece of code is currently running on? Basically I'd like to use sprng (parallel random numbers) with multiple streams and for that I need to know what stream id to use (and therefore what thread is being used).

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• In languages which create a new scope each time in a loop block, a new local copy of the local loop

  - by Jian Lin

  It seems that in language like C, Java, and Ruby (as opposed to Javascript), a new scope is created for each iteration of a loop block, and the local variable defined for the loop is actually made into a local variable every single time and recorded in this new scope? For example, in Ruby: p RUBY_VERSION $foo = [] (1..5).each do |i| $foo[i] = lambda { p i } end (1..5).each do |j| $foo[j].call() end the print out is: [MacBook01:~] $ ruby scope.rb "1.8.6" 1 2 3 4 5 [MacBook01:~] $ So, it looks like when a new scope is created, a new local copy of i is also created and recorded in this new scope, so that when the function is executed at a later time, the "i" is found in those scope chains as 1, 2, 3, 4, 5 respectively. Is this true? (It sounds like a heavy operation). Contrast that with p RUBY_VERSION $foo = [] i = 0 (1..5).each do |i| $foo[i] = lambda { p i } end (1..5).each do |j| $foo[j].call() end This time, the i is defined before entering the loop, so Ruby 1.8.6 will not put this i in the new scope created for the loop block, and therefore when the i is looked up in the scope chain, it always refer to the i that was in the outside scope, and give 5 every time: [MacBook01:~] $ ruby scope2.rb "1.8.6" 5 5 5 5 5 [MacBook01:~] $ I heard that in Ruby 1.9, i will be treated as a local defined for the loop even when there is an i defined earlier? The operation of creating a new scope, creating a new local copy of i each time through the loop seems heavy, as it seems it wouldn't have matter if we are not invoking the functions at a later time. So when the functions don't need to be invoked at a later time, could the interpreter and the compiler to C / Java try to optimize it so that there is not local copy of i each time?

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• cancel an ASIHTTPRequest thread

  - by user262325

  Hello evryone I have some codes to use ASINetworkQueue as multi thread download ASINetworkQueue *networkQueue; NSURL *url = [NSURL URLWithString:s]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [networkQueue addOperation:request]; [networkQueue go]; if I try to use the code below to cancel the thread with index k [[[networkQueue operations] objectAtIndex:k] cancel]; I notice all requests in ASINetworkQueue were cancelled and stop working. Welcome any comment Thanks interdev

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• Not enough storage is available to process this command

  - by Mohit

  I am getting this error on almost all of the operations on a Windows 7 pro 32 bit machine. By operations I mean anything I do. Update a repo from subversion. Access a local IIS Site. Copy a big folder. Run an installer.and sometime if I try again. It get solved. I think there is something wrong wit windows7 . I searched around and found posts suggesting to increase IRPStackSize value in registry I did that no Luck. I am using Microsoft Security Essentials Version: 1.0.1961.0 as my antivirus package Once this errors starts popping up. I have to restart and then in after some random time. It starts showing up again. Any help is appreciated. I am losing lot of my time in restarting my system or retrying again and again.

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• application crashes while putting setContentView in thread class in emulator

  - by Maneesh

  when I put the setContentView in thread as below, it crashes while running in emulator. new Thread(){ public void run() { setContentView(R.layout.main_layout); } }.start();

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• Pause and resume thread drawing to SurfaceView

  - by fhucho

  I am developing a chess game for Android (http://androidchess.appspot.com), using SurfaceView for the chessboard. I have a drawing Thread, that draws the chessboard in a loop. The problem is that when there are no active animations (this is more that 90% of time), it makes no sense to waste CPU and battery for drawing. How should I solve this? Maybe somehow pausing and resuming the drawing Thread?

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• Why .NET does not allow cross-thread operations?

  - by RHaguiuda

  This question is not about what is a cross-thread operation, and how to avoid it, but why internal mechanics of .NET framework does not allow a cross-thread operation. I can`t understand why a SerialPort DataReceived event cannot update a simple text box on my form and why using delegates this is possible?

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• UpdateAllWindows() from within a worker thread?

  - by Harvey

  I have a worker thread in a class that is owned by a ChildView. (I intend to move this to the Doc eventually.) When the worker thread completes a task I want all the views to be updated. How can I make a call to tell the Doc to issue an UpdateAllViews()? Or is there a better approach? Thank you.

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