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• Now Available: Visual Studio 2010 Release Candidate Virtual Machines with Sample Data and Hands-on-L

  - by John Alexander

  From a message from Brian Keller: “Back in December we posted a set of virtual machines pre-configured with Visual Studio 2010 Beta 2, Visual Studio Team Foundation Server 2010 Beta 2, and 7 hands-on-labs. I am pleased to announce that today we have shipped an updated virtual machine using the Visual Studio 2010 Release Candidate bits, a brand new sample application, and 9 hands-on-labs. This VM is customer-ready and includes everything you need to learn and/or deliver demonstrations of many of my favorite application lifecycle management (ALM) capabilities in Visual Studio 2010. This VM is available in the virtualization platform of your choice (Hyper-V, Virtual PC 2007 SP1, and Windows [7] Virtual PC). Hyper-V is highly recommended because of the performance benefits and snapshotting capabilities. Tailspin Toys The sample application we are using in this virtual machine is a simple ASP.NET MVC 2 storefront called Tailspin Toys. Tailspin Toys sells model airplanes and relies on the application lifecycle management capabilities of Visual Studio 2010 to help them build, test, and maintain their storefront. Major kudos go to Dan Massey for building out this great application for us. Hands-on-Labs / Demo Scripts The 9 hands-on-labs / demo scripts which accompany this virtual machine cover several of the core capabilities of conducting application lifecycle management with Visual Studio 2010. Each document can be used by an individual in a hands-on-lab capacity, to learn how to perform a given set of tasks, or used by a presenter to deliver a demonstration or classroom-style training. Unlike the beta 2 release, 100% of these labs target Tailspin Toys to help ensure a consistent storytelling experience. Software quality: Authoring and Running Manual Tests using Microsoft Test Manager 2010 Introduction to Test Case Management with Microsoft Test Manager 2010 Introduction to Coded UI Tests with Visual Studio 2010 Ultimate Debugging with IntelliTrace using Visual Studio 2010 Ultimate Software architecture: Code Discovery using the architecture tools in Visual Studio 2010 Ultimate Understanding Class Coupling with Visual Studio 2010 Ultimate Using the Architecture Explore in Visual Studio 2010 Ultimate to Analyze Your Code Software Configuration Management: Planning your Projects with Team Foundation Server 2010 Branching and Merging Visualization with Team Foundation Server 2010 “ Check out Brian’s Post for more info including download instructions…

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• Exadata X3 In-Memory Database Machine: To be or not to be

  - by Luis Moreno Campos

  Since Larry Ellison announced Oracle Exadata X3 as the new generation of the Database Machine, he established the product in the In-Memory Database arena. And that annoyed some people. We all know that In-Memory Databases are the ones that *only* execute in memory and use the other layers of storage for persistency (mainly disk). Oracle database has always been a technology that uses memory as a caching mechanism and that hasn't change nor it will change with Oracle Database 12c. So this is the central point of fuss when it comes to announcing an Engineered Systems as In-Memory Database, when in fact it still runs Oracle Database, not vanilla but still the same product. Let me tell you purist people out there: when you find no new ground breaking point to get all excited about you decide to bash it, and go against its claims. It's not like a car manufacturer that launches a mini-van in the market and calls it a Sports Car, we are talking about a fundamental change in the ILM stack: level 2 of caching is now self sufficient. It's not DRAM? Who cares, still let's you put in flash amounts of data not done up until now, so I guess Oracle can name it whatever Larry wants because in the end it's something never done before. Now let's imagine that you hop on the pure In-Memory Database bandwagon. You would be stuck with a database technology that lags behind the Oracle Database hundreds of light years in man/hours innovations and features. Do you really want to travel back in time? Remember, the first rule about time travelling is that "Security is not Guaranteed". Your choice. LMC

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• trying to upgrade memory

  - by user214876

  I've been using Ubuntu on my laptop for awhile now. Not quite used to it yet. I've got a Acer Aspire with an orig 4 gig mem/500 gig HDD. Running 12.04 presently 32 bit sys. I have the 13.04 upgrade disc and want to upgrade my memory to 8 Gig. Everytime I install the 8 gig memory, the system won't boot to either version. I downloaded the 64 bit version of both versions of Ubuntu but no results yet. Can anyone offer a suggestion here? I'm kinda lost. Additional Information: The memory was purchased through Acer/Kingston. Recommended for this computer. I watched the video on installing it, so I doubt it's installed wrong. (There's only one way of putting it in). I swapped Op Sys, from Ubuntu 12.04 to 13.04 to 13.10 and now to Xubuntu 13.10 64 bit version. I'm still not having any luck with this upgrade. Would it be necessary to upgrade the CPU? It's just a thought, I don't know what else could keep me from utilizing the new memory. Additional Information: Called Kingston this afternoon, they are sending replacement lower density memory modules 2/4 gig - 8 gig. Tech service says I need to upgrade BIOS to utilize new memory install VIA Dos since it is no longer a windows system. I'm not sure how to go about that but it's a learning process I can live with. Thank you all for your help/support. I realize this isn't a Ubuntu problem but each new user of this op sys, seems to share simular problems and maybe someone can use this info to their advantage.

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• Help with POCO library (Shared memory)

  - by sevaxx

  I was advised to use the POCO library for inter-process communication (IPC). Looks like a powerful library and there is some documentation in the code, but I would prefer a working example , since I am not very familiar with the IPC stuff. I 've been searching for some time now and I'm out of luck. If anyone has used POCO Shared Memory successfully in the past, I would love to see some sample code !

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• Tomcat - How to limit the maximum memory Tomcat will use

  - by gav

  Hi Guys, I am running Tomcat on a small VPS (256MB/512MB) and I want to explicitly limit the amount of memory Tomcat uses. I understand that I can configure this somehow by passing in the java maximum heap and initial heap size arguments; -Xmx256m -Xms128m But I can't find where to put this in the configuration of Tomcat 6 on Ubuntu. Thanks in advance, Gav

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• uiwebview memory leaks

  - by Nnp

  i am getting following memory leaks for webview initWebUILocalStorageSupport MobileQuickLookLibrary() and here is my code, i dont know what i am missing. NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10.0f]; [theRequest setHTTPMethod:@"POST"]; NSData *data = [self GenerateData]; if (data) { [theRequest setHTTPBody:data]; } [webView loadRequest:theRequest]; i hope my question is clear.thanks

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• What is a Delphi version of the C++ header for the DVP7010B video card DLL?

  - by grzegorz1

  I need help with converting c++ header file to delphi. I spent several days on this problem without success. Below is the original header file and my Delphi translation. C++ header #if _MSC_VER > 1000 #pragma once #endif // _MSC_VER > 1000 #ifdef DVP7010BDLL_EXPORTS #define DVP7010BDLL_API __declspec(dllexport) #else #define DVP7010BDLL_API __declspec(dllimport) #endif #define MAXBOARDS 4 #define MAXDEVS 4 #define ID_NEW_FRAME 37810 #define ID_MUX0_NEW_FRAME 37800 #define ID_MUX1_NEW_FRAME 37801 #define ID_MUX2_NEW_FRAME 37802 #define ID_MUX3_NEW_FRAME 37803 typedef enum { SUCCEEDED = 1, FAILED = 0, SDKINITFAILED = -1, PARAMERROR = -2, NODEVICES = -3, NOSAMPLE = -4, DEVICENUMERROR = -5, INPUTERROR = -6, // VERIFYHWERROR = -7 } Res; typedef enum tagAnalogVideoFormat { Video_None = 0x00000000, Video_NTSC_M = 0x00000001, Video_NTSC_M_J = 0x00000002, Video_PAL_B = 0x00000010, Video_PAL_M = 0x00000200, Video_PAL_N = 0x00000400, Video_SECAM_B = 0x00001000 } AnalogVideoFormat; typedef enum { SIZEFULLPAL=0, SIZED1, SIZEVGA, SIZEQVGA, SIZESUBQVGA } VideoSize; typedef enum { STOPPED = 1, RUNNING = 2, UNINITIALIZED = -1, UNKNOWNSTATE = -2 } CapState; class IDVP7010BDLL { public: int AdvDVP_CreateSDKInstence(void **pp); virtual int AdvDVP_InitSDK() PURE; virtual int AdvDVP_CloseSDK() PURE; virtual int AdvDVP_GetNoOfDevices(int *pNoOfDevs) PURE; virtual int AdvDVP_Start(int nDevNum, int SwitchingChans, HWND Main, HWND hwndPreview) PURE; virtual int AdvDVP_Stop(int nDevNum) PURE; virtual int AdvDVP_GetCapState(int nDevNum) PURE; virtual int AdvDVP_IsVideoPresent(int nDevNum, BOOL* VPresent) PURE; virtual int AdvDVP_GetCurFrameBuffer(int nDevNum, int VMux, long* bufSize, BYTE* buf) PURE; virtual int AdvDVP_SetNewFrameCallback(int nDevNum, int callback) PURE; virtual int AdvDVP_GetVideoFormat(int nDevNum, AnalogVideoFormat* vFormat) PURE; virtual int AdvDVP_SetVideoFormat(int nDevNum, AnalogVideoFormat vFormat) PURE; virtual int AdvDVP_GetFrameRate(int nDevNum, int *nFrameRate) PURE; virtual int AdvDVP_SetFrameRate(int nDevNum, int SwitchingChans, int nFrameRate) PURE; virtual int AdvDVP_GetResolution(int nDevNum, VideoSize *Size) PURE; virtual int AdvDVP_SetResolution(int nDevNum, VideoSize Size) PURE; virtual int AdvDVP_GetVideoInput(int nDevNum, int* input) PURE; virtual int AdvDVP_SetVideoInput(int nDevNum, int input) PURE; virtual int AdvDVP_GetBrightness(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetBrightness(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GetContrast(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetContrast(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GetHue(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetHue(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GetSaturation(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetSaturation(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GPIOGetData(int nDevNum, int DINum, BOOL* value) PURE; virtual int AdvDVP_GPIOSetData(int nDevNum, int DONum, BOOL value) PURE; }; Delphi unit IDVP7010BDLL_h; interface uses Windows, Messages, SysUtils, Classes; //{$if _MSC_VER > 1000} //pragma once //{$endif} // _MSC_VER > 1000 {$ifdef DVP7010BDLL_EXPORTS} //const DVP7010BDLL_API = __declspec(dllexport); {$else} //const DVP7010BDLL_API = __declspec(dllimport); {$endif} const MAXDEVS = 4; MAXMUXS = 4; ID_NEW_FRAME = 37810; ID_MUX0_NEW_FRAME = 37800; ID_MUX1_NEW_FRAME = 37801; ID_MUX2_NEW_FRAME = 37802; ID_MUX3_NEW_FRAME = 37803; // TRec SUCCEEDED = 1; FAILED = 0; SDKINITFAILED = -1; PARAMERROR = -2; NODEVICES = -3; NOSAMPLE = -4; DEVICENUMERROR = -5; INPUTERROR = -6; // TRec // TAnalogVideoFormat Video_None = $00000000; Video_NTSC_M = $00000001; Video_NTSC_M_J = $00000002; Video_PAL_B = $00000010; Video_PAL_M = $00000200; Video_PAL_N = $00000400; Video_SECAM_B = $00001000; // TAnalogVideoFormat // TCapState STOPPED = 1; RUNNING = 2; UNINITIALIZED = -1; UNKNOWNSTATE = -2; // TCapState type TCapState = Longint; TRes = Longint; TtagAnalogVideoFormat = DWORD; TAnalogVideoFormat = TtagAnalogVideoFormat; PAnalogVideoFormat = ^TAnalogVideoFormat; TVideoSize = ( SIZEFULLPAL, SIZED1, SIZEVGA, SIZEQVGA, SIZESUBQVGA); PVideoSize = ^TVideoSize; P_Pointer = ^Pointer; TIDVP7010BDLL = class function AdvDVP_CreateSDKInstence(pp: P_Pointer): integer; virtual; stdcall; abstract; function AdvDVP_InitSDK():Integer; virtual; stdcall; abstract; function AdvDVP_CloseSDK():Integer; virtual; stdcall; abstract; function AdvDVP_GetNoOfDevices(pNoOfDevs : PInteger) :Integer; virtual; stdcall; abstract; function AdvDVP_Start(nDevNum : Integer; SwitchingChans : Integer; Main : HWND; hwndPreview: HWND ) :Integer; virtual; stdcall; abstract; function AdvDVP_Stop(nDevNum : Integer ):Integer; virtual; stdcall; abstract; function AdvDVP_GetCapState(nDevNum : Integer ):Integer; virtual; stdcall; abstract; function AdvDVP_IsVideoPresent(nDevNum : Integer; VPresent : PBool) :Integer; virtual; stdcall; abstract; function AdvDVP_GetCurFrameBuffer(nDevNum : Integer; VMux : Integer; bufSize : PLongInt; buf : PByte) :Integer; virtual; stdcall; abstract; function AdvDVP_SetNewFrameCallback(nDevNum : Integer; callback : Integer ) :Integer; virtual; stdcall; abstract; function AdvDVP_GetVideoFormat(nDevNum : Integer; vFormat : PAnalogVideoFormat) :Integer; virtual; stdcall; abstract; function AdvDVP_SetVideoFormat(nDevNum : Integer; vFormat : TAnalogVideoFormat ) :Integer; virtual; stdcall; abstract; function AdvDVP_GetFrameRate(nDevNum : Integer; nFrameRate : Integer) :Integer; virtual; stdcall; abstract; function AdvDVP_SetFrameRate(nDevNum : Integer; SwitchingChans : Integer; nFrameRate : Integer) :Integer; virtual; stdcall; abstract; function AdvDVP_GetResolution(nDevNum : Integer; Size : PVideoSize) :Integer; virtual; stdcall; abstract; function AdvDVP_SetResolution(nDevNum : Integer; Size : TVideoSize ) :Integer; virtual; stdcall; abstract; function AdvDVP_GetVideoInput(nDevNum : Integer; input : PInteger) :Integer; virtual; stdcall; abstract; function AdvDVP_SetVideoInput(nDevNum : Integer; input : Integer) :Integer; virtual; stdcall; abstract; function AdvDVP_GetBrightness(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetBrightness(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GetContrast(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetContrast(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GetHue(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetHue(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GetSaturation(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetSaturation(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GPIOGetData(nDevNum : Integer; DINum:Integer; value : PBool) :Integer; virtual; stdcall; abstract; function AdvDVP_GPIOSetData(nDevNum : Integer; DONum:Integer; value : Boolean) :Integer; virtual; stdcall; abstract; end; function IDVP7010BDLL : TIDVP7010BDLL ; stdcall; implementation function IDVP7010BDLL; external 'DVP7010B.dll'; end.

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• ToolStrip memory leak

  - by Marcus

  Hi, I've been having trouble with memory leaks with the SWF-ToolStrip. According to this http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=115600# is has been resolved. But here it seemes not. Anyone know how to resolve this?

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• Memory Leak Issue in Weblogic, SUN, Apache and Oracle classes Options

  - by Amit

  Hi All, Please find below the description of memory leaks issues. Statistics show major growth in the perm area (static classes). Flows were ran for 8 hours , Heap dump was taken after 2 hours and at the end. A growth in Perm area was identified Statistics show from our last run 240MB growth in 6 hour,40mb growth every hour 2GB heap –can hold ¾ days ,heap will be full in ¾ days Heap dump show –growth in area as mentioned below JMS connection/session Area Apache org.apache.xml.dtm.DTM[] org.apache.xml.dtm.ref.ExpandedNameTable$ExtendedType org.jdom.AttributeList org.jdom.Content[] org.jdom.ContentList org.jdom.Element SUN * ConstantPoolCacheKlass * ConstantPoolKlass * ConstMethodKlass * MethodDataKlass * MethodKlass * SymbolKlass byte[] char[] com.sun.org.apache.xml.internal.dtm.DTM[] com.sun.org.apache.xml.internal.dtm.ref.ExtendedType java.beans.PropertyDescriptor java.lang.Class java.lang.Long java.lang.ref.WeakReference java.lang.ref.SoftReference java.lang.String java.text.Format[] java.util.concurrent.ConcurrentHashMap$Segment java.util.LinkedList$Entry Weblogic com.bea.console.cvo.ConsoleValueObject$PropertyInfo com.bea.jsptools.tree.TreeNode com.bea.netuix.servlets.controls.content.StrutsContent com.bea.netuix.servlets.controls.layout.FlowLayout com.bea.netuix.servlets.controls.layout.GridLayout com.bea.netuix.servlets.controls.layout.Placeholder com.bea.netuix.servlets.controls.page.Book com.bea.netuix.servlets.controls.window.Window[] com.bea.netuix.servlets.controls.window.WindowMode javax.management.modelmbean.ModelMBeanAttributeInfo weblogic.apache.xerces.parsers.SecurityConfiguration weblogic.apache.xerces.util.AugmentationsImpl weblogic.apache.xerces.util.AugmentationsImpl$SmallContainer weblogic.apache.xerces.util.SymbolTable$Entry weblogic.apache.xerces.util.XMLAttributesImpl$Attribute weblogic.apache.xerces.xni.QName weblogic.apache.xerces.xni.QName[] weblogic.ejb.container.cache.CacheKey weblogic.ejb20.manager.SimpleKey weblogic.jdbc.common.internal.ConnectionEnv weblogic.jdbc.common.internal.StatementCacheKey weblogic.jms.common.Item weblogic.jms.common.JMSID weblogic.jms.frontend.FEConnection weblogic.logging.MessageLogger$1 weblogic.logging.WLLogRecord weblogic.rjvm.BubblingAbbrever$BubblingAbbreverEntry weblogic.rjvm.ClassTableEntry weblogic.rjvm.JVMID weblogic.rmi.cluster.ClusterableRemoteRef weblogic.rmi.internal.CollocatedRemoteRef weblogic.rmi.internal.PhantomRef weblogic.rmi.spi.ServiceContext[] weblogic.security.acl.internal.AuthenticatedSubject weblogic.security.acl.internal.AuthenticatedSubject$SealableSet weblogic.servlet.internal.ServletRuntimeMBeanImpl weblogic.transaction.internal.XidImpl weblogic.utils.collections.ConcurrentHashMap$Entry Oracle XA Transaction oracle.jdbc.driver.Binder[] oracle.jdbc.driver.OracleDatabaseMetaData oracle.jdbc.driver.T4C7Ocommoncall oracle.jdbc.driver.T4C7Oversion oracle.jdbc.driver.T4C8Oall oracle.jdbc.driver.T4C8Oclose oracle.jdbc.driver.T4C8TTIBfile oracle.jdbc.driver.T4C8TTIBlob oracle.jdbc.driver.T4C8TTIClob oracle.jdbc.driver.T4C8TTIdty oracle.jdbc.driver.T4C8TTILobd oracle.jdbc.driver.T4C8TTIpro oracle.jdbc.driver.T4C8TTIrxh oracle.jdbc.driver.T4C8TTIuds oracle.jdbc.driver.T4CCallableStatement oracle.jdbc.driver.T4CClobAccessor oracle.jdbc.driver.T4CConnection oracle.jdbc.driver.T4CMAREngine oracle.jdbc.driver.T4CNumberAccessor oracle.jdbc.driver.T4CPreparedStatement oracle.jdbc.driver.T4CTTIdcb oracle.jdbc.driver.T4CTTIk2rpc oracle.jdbc.driver.T4CTTIoac oracle.jdbc.driver.T4CTTIoac[] oracle.jdbc.driver.T4CTTIoauthenticate oracle.jdbc.driver.T4CTTIokeyval oracle.jdbc.driver.T4CTTIoscid oracle.jdbc.driver.T4CTTIoses oracle.jdbc.driver.T4CTTIOtxen oracle.jdbc.driver.T4CTTIOtxse oracle.jdbc.driver.T4CTTIsto oracle.jdbc.driver.T4CXAConnection oracle.jdbc.driver.T4CXAResource oracle.jdbc.oracore.OracleTypeADT[] oracle.jdbc.xa.OracleXAResource$XidListEntry oracle.net.ano.Ano oracle.net.ns.ClientProfile oracle.net.ns.ClientProfile oracle.net.ns.NetInputStream oracle.net.ns.NetOutputStream oracle.net.ns.SessionAtts oracle.net.nt.ConnOption oracle.net.nt.ConnStrategy oracle.net.resolver.AddrResolution oracle.sql.CharacterSet1Byte we are using Oracle BEA Weblogic 9.2 MP3 JDK 1.5.12 Oracle versoin 10.2.0.4 (for oracle we found one path which is needed to applied to avoid XA transaction memory leaks). But we are stuck to resolve SUN, BEA Weblgogic and Apache leaks. please suggest... regards, Amit J.

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• Create Virtual Directory and Set Permissions IIS7 - Cannot read configuration file due to insufficie

  - by Nick

  I am trying to create a virtual directory and set it's permissions using IIS7 and C#. Here is a sample of my code: using (ServerManager serverManager = new ServerManager(webSite)) { ConfigurationSection anonymousAuthenticationSection = config.GetSection( @"system.webServer/security/authentication/anonymousAuthentication", webSite); anonymousAuthenticationSection["enabled"] = true; serverManager.CommitChanges(); return "true"; } This throws an exception and the message is: Cannot read configuration file due to insufficient permissions. Can someone help?

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• Memory leak on CollectionView.View.Refresh

  - by Dabblernl

  I have defined my binding thus: <TreeView ItemsSource="{Binding UsersView.View}" ItemTemplate="{StaticResource MyDataTemplate}" /> The CollectionViewSource is defined thus: private ObservableCollection<UserData> users; public CollectionViewSource UsersView{get;set;} UsersView=new CollectionViewSource{Source=users}; UsersView.SortDescriptions.Add( new SortDescription("IsLoggedOn",ListSortDirection.Descending); UsersView.SortDescriptions.Add( new SortDescription("Username",ListSortDirection.Ascending); So far, so good, this works as expected: The view shows first the users that are logged on in alphabetical order, then the ones that are not. However, the IsLoggedIn property of the UserData is updated every few seconds by a backgroundworker thread and then the code calls: UsersView.View.Refresh(); on the UI thread. Again this works as expected: users that log on are moved from the bottom of the view to the top and vice versa. However: Every time I call the Refresh method on the view the application hoards 3,5MB of extra memory, which is only released after application shutdown (or after an OutOfMemoryException...) I did some research and below is a list of fixes that did NOT work: The UserData class implements INotifyPropertyChanged Changing the underlying users collection does not make any difference at all: any IENumerable<UserData as a source for the CollectionViewSource causes the problem. -Changing the ColletionViewSource to a List<UserData (and refreshing the binding) or inheriting from ObservableCollection to get access to the underlying Items collection to sort that in place does not work. I am out of ideas! Help? EDIT: I found it: The Resource MyDataTemplate contains a Label that is bound to a UserData object to show one of its properties, the UserData objects being handed down by the TreeView's ItemsSource. The Label has a ContextMenu defined thus: <ContextMenu Background="Transparent" Width="325" Opacity=".8" HasDropShadow="True"> <PrivateMessengerUI:MyUserData IsReadOnly="True" > <PrivateMessengerUI:MyUserData.DataContext> <Binding Path="."/> </PrivateMessengerUI:MyUserData.DataContext> </PrivateMessengerUI:MyUserData> </ContextMenu> The MyUserData object is a UserControl that shows All properties of the UserData object. In this way the user first only sees one piece of data of a user and on a right click sees all of it. When I remove the MyUserData UserControl from the DataTemplate the memory leak disappears! How can I still implement the behaviour as specified above?

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• C# memory management: unsafe keyword and pointers

  - by Alerty

  What are the consequences (positive/negative) of using the unsafe keyword in C# to use pointers? For example, what becomes of garbage collection, what are the performance gains/losses, what are the performance gains/losses compared to other languages manual memory management, what are the dangers, in which situation is it really justifiable to make use of this language feature... ?

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• C++ memory usage

  - by bad_programmer

  Hi. I have pointer str: char * str = new char[10]; I'm using this memory for store data. How can I allocate more bytes for str and don't lost old data from str?

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• Need help converting a C++ header file to delphi

  - by grzegorz1

  I need help with converting c++ header file to delphi. I spent several days on this problem without success. Below is the original header file and my Delphi translation. ///////////////////////// C++ header file //////////////////////////////////// if _MSC_VER 1000 pragma once endif // _MSC_VER 1000 ifdef DVP7010BDLL_EXPORTS define DVP7010BDLL_API __declspec(dllexport) else define DVP7010BDLL_API __declspec(dllimport) endif define MAXBOARDS 4 define MAXDEVS 4 define ID_NEW_FRAME 37810 define ID_MUX0_NEW_FRAME 37800 define ID_MUX1_NEW_FRAME 37801 define ID_MUX2_NEW_FRAME 37802 define ID_MUX3_NEW_FRAME 37803 typedef enum { SUCCEEDED = 1, FAILED = 0, SDKINITFAILED = -1, PARAMERROR = -2, NODEVICES = -3, NOSAMPLE = -4, DEVICENUMERROR = -5, INPUTERROR = -6, // VERIFYHWERROR = -7 } Res; typedef enum tagAnalogVideoFormat { Video_None = 0x00000000, Video_NTSC_M = 0x00000001, Video_NTSC_M_J = 0x00000002, Video_PAL_B = 0x00000010, Video_PAL_M = 0x00000200, Video_PAL_N = 0x00000400, Video_SECAM_B = 0x00001000 } AnalogVideoFormat; typedef enum { SIZEFULLPAL=0, SIZED1, SIZEVGA, SIZEQVGA, SIZESUBQVGA } VideoSize; typedef enum { STOPPED = 1, RUNNING = 2, UNINITIALIZED = -1, UNKNOWNSTATE = -2 } CapState; class IDVP7010BDLL { public: int AdvDVP_CreateSDKInstence(void **pp); virtual int AdvDVP_InitSDK() PURE; virtual int AdvDVP_CloseSDK() PURE; virtual int AdvDVP_GetNoOfDevices(int *pNoOfDevs) PURE; virtual int AdvDVP_Start(int nDevNum, int SwitchingChans, HWND Main, HWND hwndPreview) PURE; virtual int AdvDVP_Stop(int nDevNum) PURE; virtual int AdvDVP_GetCapState(int nDevNum) PURE; virtual int AdvDVP_IsVideoPresent(int nDevNum, BOOL* VPresent) PURE; virtual int AdvDVP_GetCurFrameBuffer(int nDevNum, int VMux, long* bufSize, BYTE* buf) PURE; virtual int AdvDVP_SetNewFrameCallback(int nDevNum, int callback) PURE; virtual int AdvDVP_GetVideoFormat(int nDevNum, AnalogVideoFormat* vFormat) PURE; virtual int AdvDVP_SetVideoFormat(int nDevNum, AnalogVideoFormat vFormat) PURE; virtual int AdvDVP_GetFrameRate(int nDevNum, int *nFrameRate) PURE; virtual int AdvDVP_SetFrameRate(int nDevNum, int SwitchingChans, int nFrameRate) PURE; virtual int AdvDVP_GetResolution(int nDevNum, VideoSize *Size) PURE; virtual int AdvDVP_SetResolution(int nDevNum, VideoSize Size) PURE; virtual int AdvDVP_GetVideoInput(int nDevNum, int* input) PURE; virtual int AdvDVP_SetVideoInput(int nDevNum, int input) PURE; virtual int AdvDVP_GetBrightness(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetBrightness(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GetContrast(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetContrast(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GetHue(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetHue(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GetSaturation(int nDevNum, int input, long *pnValue) PURE; virtual int AdvDVP_SetSaturation(int nDevNum, int input, long nValue) PURE; virtual int AdvDVP_GPIOGetData(int nDevNum, int DINum, BOOL* value) PURE; virtual int AdvDVP_GPIOSetData(int nDevNum, int DONum, BOOL value) PURE; }; /////////////////// delphi /////////////////////////////////////// unit IDVP7010BDLL_h; interface uses Windows, Messages, SysUtils, Classes; //{$if _MSC_VER 1000} //pragma once //{$endif} // _MSC_VER 1000 {$ifdef DVP7010BDLL_EXPORTS} //const DVP7010BDLL_API = __declspec(dllexport); {$else} //const DVP7010BDLL_API = __declspec(dllimport); {$endif} const MAXDEVS = 4; MAXMUXS = 4; ID_NEW_FRAME = 37810; ID_MUX0_NEW_FRAME = 37800; ID_MUX1_NEW_FRAME = 37801; ID_MUX2_NEW_FRAME = 37802; ID_MUX3_NEW_FRAME = 37803; // TRec SUCCEEDED = 1; FAILED = 0; SDKINITFAILED = -1; PARAMERROR = -2; NODEVICES = -3; NOSAMPLE = -4; DEVICENUMERROR = -5; INPUTERROR = -6; // TRec // TAnalogVideoFormat Video_None = $00000000; Video_NTSC_M = $00000001; Video_NTSC_M_J = $00000002; Video_PAL_B = $00000010; Video_PAL_M = $00000200; Video_PAL_N = $00000400; Video_SECAM_B = $00001000; // TAnalogVideoFormat // TCapState STOPPED = 1; RUNNING = 2; UNINITIALIZED = -1; UNKNOWNSTATE = -2; // TCapState type TCapState = Longint; TRes = Longint; TtagAnalogVideoFormat = DWORD; TAnalogVideoFormat = TtagAnalogVideoFormat; PAnalogVideoFormat = ^TAnalogVideoFormat; TVideoSize = ( SIZEFULLPAL, SIZED1, SIZEVGA, SIZEQVGA, SIZESUBQVGA); PVideoSize = ^TVideoSize; P_Pointer = ^Pointer; TIDVP7010BDLL = class function AdvDVP_CreateSDKInstence(pp: P_Pointer): integer; virtual; stdcall; abstract; function AdvDVP_InitSDK():Integer; virtual; stdcall; abstract; function AdvDVP_CloseSDK():Integer; virtual; stdcall; abstract; function AdvDVP_GetNoOfDevices(pNoOfDevs : PInteger) :Integer; virtual; stdcall; abstract; function AdvDVP_Start(nDevNum : Integer; SwitchingChans : Integer; Main : HWND; hwndPreview: HWND ) :Integer; virtual; stdcall; abstract; function AdvDVP_Stop(nDevNum : Integer ):Integer; virtual; stdcall; abstract; function AdvDVP_GetCapState(nDevNum : Integer ):Integer; virtual; stdcall; abstract; function AdvDVP_IsVideoPresent(nDevNum : Integer; VPresent : PBool) :Integer; virtual; stdcall; abstract; function AdvDVP_GetCurFrameBuffer(nDevNum : Integer; VMux : Integer; bufSize : PLongInt; buf : PByte) :Integer; virtual; stdcall; abstract; function AdvDVP_SetNewFrameCallback(nDevNum : Integer; callback : Integer ) :Integer; virtual; stdcall; abstract; function AdvDVP_GetVideoFormat(nDevNum : Integer; vFormat : PAnalogVideoFormat) :Integer; virtual; stdcall; abstract; function AdvDVP_SetVideoFormat(nDevNum : Integer; vFormat : TAnalogVideoFormat ) :Integer; virtual; stdcall; abstract; function AdvDVP_GetFrameRate(nDevNum : Integer; nFrameRate : Integer) :Integer; virtual; stdcall; abstract; function AdvDVP_SetFrameRate(nDevNum : Integer; SwitchingChans : Integer; nFrameRate : Integer) :Integer; virtual; stdcall; abstract; function AdvDVP_GetResolution(nDevNum : Integer; Size : PVideoSize) :Integer; virtual; stdcall; abstract; function AdvDVP_SetResolution(nDevNum : Integer; Size : TVideoSize ) :Integer; virtual; stdcall; abstract; function AdvDVP_GetVideoInput(nDevNum : Integer; input : PInteger) :Integer; virtual; stdcall; abstract; function AdvDVP_SetVideoInput(nDevNum : Integer; input : Integer) :Integer; virtual; stdcall; abstract; function AdvDVP_GetBrightness(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetBrightness(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GetContrast(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetContrast(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GetHue(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetHue(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GetSaturation(nDevNum : Integer; input: Integer; pnValue : PLongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_SetSaturation(nDevNum : Integer; input: Integer; nValue : LongInt) :Integer; virtual; stdcall; abstract; function AdvDVP_GPIOGetData(nDevNum : Integer; DINum:Integer; value : PBool) :Integer; virtual; stdcall; abstract; function AdvDVP_GPIOSetData(nDevNum : Integer; DONum:Integer; value : Boolean) :Integer; virtual; stdcall; abstract; end; function IDVP7010BDLL : TIDVP7010BDLL ; stdcall; implementation function IDVP7010BDLL; external 'DVP7010B.dll'; end.

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• Retrieving virtual disk file name from disk number

  - by Josip Medved

  When I list virtual disks within diskpart: DISKPART> list vdisk VDisk ### Disk ### State Type File --------- -------- -------------------- --------- ---- VDisk 0 Disk 2 Attached not open Fixed C:\Disk.vhd Interesting part for me here is file name. I tried to find equivalent of function that would give me file name (under File column) if I know disk number. Any idea which function that might be?

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• Windows Service HTTPListener Memory Issue

  - by crawshaws

  Hi all, Im a complete novice to the "best practices" etc of writing in any code. I tend to just write it an if it works, why fix it. Well, this way of working is landing me in some hot water. I am writing a simple windows service to server a single webpage. (This service will be incorperated in to another project which monitors the services and some folders on a group of servers.) My problem is that whenever a request is recieved, the memory usage jumps up by a few K per request and keeps qoing up on every request. Now ive found that by putting GC.Collect in the mix it stops at a certain number but im sure its not meant to be used this way. I was wondering if i am missing something or not doing something i should to free up memory. Here is the code: Public Class SimpleWebService : Inherits ServiceBase 'Set the values for the different event log types. Public Const EVENT_ERROR As Integer = 1 Public Const EVENT_WARNING As Integer = 2 Public Const EVENT_INFORMATION As Integer = 4 Public listenerThread As Thread Dim HTTPListner As HttpListener Dim blnKeepAlive As Boolean = True Shared Sub Main() Dim ServicesToRun As ServiceBase() ServicesToRun = New ServiceBase() {New SimpleWebService()} ServiceBase.Run(ServicesToRun) End Sub Protected Overrides Sub OnStart(ByVal args As String()) If Not HttpListener.IsSupported Then CreateEventLogEntry("Windows XP SP2, Server 2003, or higher is required to " & "use the HttpListener class.") Me.Stop() End If Try listenerThread = New Thread(AddressOf ListenForConnections) listenerThread.Start() Catch ex As Exception CreateEventLogEntry(ex.Message) End Try End Sub Protected Overrides Sub OnStop() blnKeepAlive = False End Sub Private Sub CreateEventLogEntry(ByRef strEventContent As String) Dim sSource As String Dim sLog As String sSource = "Service1" sLog = "Application" If Not EventLog.SourceExists(sSource) Then EventLog.CreateEventSource(sSource, sLog) End If Dim ELog As New EventLog(sLog, ".", sSource) ELog.WriteEntry(strEventContent) End Sub Public Sub ListenForConnections() HTTPListner = New HttpListener HTTPListner.Prefixes.Add("http://*:1986/") HTTPListner.Start() Do While blnKeepAlive Dim ctx As HttpListenerContext = HTTPListner.GetContext() Dim HandlerThread As Thread = New Thread(AddressOf ProcessRequest) HandlerThread.Start(ctx) HandlerThread = Nothing Loop HTTPListner.Stop() End Sub Private Sub ProcessRequest(ByVal ctx As HttpListenerContext) Dim sb As StringBuilder = New StringBuilder sb.Append("<html><body><h1>Test My Service</h1>") sb.Append("</body></html>") Dim buffer() As Byte = Encoding.UTF8.GetBytes(sb.ToString) ctx.Response.ContentLength64 = buffer.Length ctx.Response.OutputStream.Write(buffer, 0, buffer.Length) ctx.Response.OutputStream.Close() ctx.Response.Close() sb = Nothing buffer = Nothing ctx = Nothing 'This line seems to keep the mem leak down 'System.GC.Collect() End Sub End Class Please feel free to critisise and tear the code apart but please BE KIND. I have admitted I dont tend to follow the best practice when it comes to coding.

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• Virtual base class

  - by imran

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• .Net Memory limit

  - by Prashant

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• XCode and Instruments for memory leaks

  - by coure06

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  - by Robert

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  I am writing a program that will need to communicate to a server through a TS connection. Virtual Channels seems to be exactly what I need but Microsoft's documentation leaves very much to be desired. Does anyone know of good tutorials or just some examples I could use to help me. Preferred language is C# but C++ examples are fine too.

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• Memory leak detection tool for qt applications on windows

  - by Surjya Narayana Padhi

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