BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  atexit and freelibrary          BorlandTalk.com Forum Index -> C++ Builder (Compatibility with MFC) View previous topic :: View next topic   Author Message pypardo Guest Posted: Fri Oct 20, 2006 1:45 pm    Post subject: atexit and freelibrary Hi, FreeLibrary automatically call functions registered with atexit. I don't think it's normal ! I use bcb6.0 (with allupdates). Did somebody has information about this strange feature, and a workaround ! The only workaround I found is to avoid unloading libraries but it is not clean enough to be used in my application. Best regards pierre Back to top Ed Mulroy Guest Posted: Fri Oct 20, 2006 11:37 pm    Post subject: Re: atexit and freelibrary Quote: FreeLibrary automatically call functions registered with atexit. No it does not. FreeLibrary is a function supplied in an external DLL by Windows and has no idea of the functions registered with atexit. Look at the program again. Something else is wrong. You might start by checking the value of the module handle used in the call to FreeLibrary. .. Ed Quote: pypardo wrote in message news:XnF98626D12DFF7Bpypardonospamgmailco (AT) 207 (DOT) 105.83.66... Hi, FreeLibrary automatically call functions registered with atexit. I don't think it's normal ! I use bcb6.0 (with allupdates). Did somebody has information about this strange feature, and a workaround ! The only workaround I found is to avoid unloading libraries but it is not clean enough to be used in my application. Back to top pypardo Guest Posted: Mon Oct 23, 2006 1:52 pm    Post subject: Re: atexit and freelibrary "Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> écrivait news:45391768$1 (AT) newsgroups (DOT) borland.com: Quote: FreeLibrary automatically call functions registered with atexit. No it does not. FreeLibrary is a function supplied in an external DLL by Windows and has no idea of the functions registered with atexit. Look at the program again. Something else is wrong. You might start by checking the value of the module handle used in the call to FreeLibrary. . Ed Hi, I can confirm this problem. I create a simple project, with just an atexit function at the begining. And 2 buttons (loadlibrary and freelibrary). I push loadlibrary button, and then freelibrary button. When freelibrary is called, the function registered in atexit is called !!! I can send my project if needed (maybe in borland.public.attachements ?). I use BCB6.0, and my program/library are compiled with use of the rtl. Best regards pierre. Back to top pypardo Guest Posted: Mon Oct 23, 2006 2:00 pm    Post subject: Re: atexit and freelibrary "Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> écrivait news:45391768$1 (AT) newsgroups (DOT) borland.com: Quote: FreeLibrary automatically call functions registered with atexit. No it does not. FreeLibrary is a function supplied in an external DLL by Windows and has no idea of the functions registered with atexit. Look at the program again. Something else is wrong. You might start by checking the value of the module handle used in the call to FreeLibrary. . Ed Hi, here're more information: This problem only occurs when I use dynamic RTL. I really think it's a BUG, because registered function in atexit() MUST be called at the exit of the program and not during a freelibrary process. One more thing, registered function are only called once: during freelibrary, they are called, but they are not called when program exit !!! Is there a workaround or patch for this ? Best regards Back to top Ed Mulroy Guest Posted: Mon Oct 23, 2006 8:16 pm    Post subject: Re: atexit and freelibrary Quote: I can send my project if needed (maybe in borland.public. attachements ?). Before you do that, select Help|About in the IDE. Confirm that you are using build number 10.166 If you are not then go get and apply the compiler updates and try again. If you zip up the project and post it borland.public.attachments, I will look at it. Be careful to include everything the project needs except for items which came with the compiler. .. Ed Quote: pypardo wrote in message news:XnF98656E5CBFC29pypardonospamgmailco (AT) 207 (DOT) 105.83.66... I can confirm this problem. I create a simple project, with just an atexit function at the begining. And 2 buttons (loadlibrary and freelibrary). I push loadlibrary button, and then freelibrary button. When freelibrary is called, the function registered in atexit is called !!! I can send my project if needed (maybe in borland.public.attachements ?). I use BCB6.0, and my program/library are compiled with use of the rtl. Best regards pierre. Back to top pypardo Guest Posted: Mon Oct 23, 2006 8:55 pm    Post subject: Re: atexit and freelibrary "Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> écrivait news:453cdd6d$1 (AT) newsgroups (DOT) borland.com: Quote: I can send my project if needed (maybe in borland.public. attachements ?). Before you do that, select Help|About in the IDE. Confirm that you are using build number 10.166 If you are not then go get and apply the compiler updates and try again. If you zip up the project and post it borland.public.attachments, I will look at it. Be careful to include everything the project needs except for items which came with the compiler. . Ed Hi Ed, thanks for informations. I can confirm this problem with a sample project and when I use dynamic RTL. I also put an entry in borland quality central http://qc.borland.com/wc/qcmain.aspx?d=35585 I upload my sample project in borland.public.attachments (the name is ateit and freelibrary). It's easy to control the way the registered functions are called (I use OutputDebugString). =>When project and library are compiled with dynamic RTL, atexit registered functions are called when freelibrary is call (and not at the end of the program). =>When project and library are compiled without dynamic RTL, atexit registered functions are called only at the end of the program. best regards pierre Quote: pypardo wrote in message news:XnF98656E5CBFC29pypardonospamgmailco (AT) 207 (DOT) 105.83.66... I can confirm this problem. I create a simple project, with just an atexit function at the begining. And 2 buttons (loadlibrary and freelibrary). I push loadlibrary button, and then freelibrary button. When freelibrary is called, the function registered in atexit is called !!! I can send my project if needed (maybe in borland.public.attachements ?). I use BCB6.0, and my program/library are compiled with use of the rtl. Best regards pierre. Back to top Ed Mulroy Guest Posted: Mon Oct 23, 2006 10:47 pm    Post subject: Re: atexit and freelibrary You have some problems that need to be corrected. The value of the handle returned by the call to LoadLibrary is not checked for NULL. The function is passed to atexit three times, at least one of which is related to using that handle but the value is never checked. It should only be passed to atexit once. The value of the handle is not set to NULL after calling FreeLibrary and not checked for NULL prior to calling FreeLibrary. .. Ed Quote: pypardo wrote in message news:XnF98656F9A7DAC1pypardonospamgmailco (AT) 207 (DOT) 105.83.66... Back to top pypardo Guest Posted: Tue Oct 24, 2006 7:04 pm    Post subject: Re: atexit and freelibrary "Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> écrivait news:453d0045 (AT) newsgroups (DOT) borland.com: Quote: You have some problems that need to be corrected. The value of the handle returned by the call to LoadLibrary is not checked for NULL. The function is passed to atexit three times, at least one of which is related to using that handle but the value is never checked. It should only be passed to atexit once. The value of the handle is not set to NULL after calling FreeLibrary and not checked for NULL prior to calling FreeLibrary. . Ed pypardo wrote in message news:XnF98656F9A7DAC1pypardonospamgmailco (AT) 207 (DOT) 105.83.66... Hi, The problem is NOT that the freelibrary is applied on a NULL pointer. And this small program (in borland.public.attachments) is just a sample to reproduce the problem, it's not our real program. The problem is THAT a call to freelibrary call functions registered by atexit method. This problem only occurs when dynamic RTL is used. Best regards pierre Back to top Ed Mulroy Guest Posted: Tue Oct 24, 2006 8:29 pm    Post subject: Re: atexit and freelibrary So you are suggesting that I debug and fix the example code you posted and then try to use it to explain what is happening in the program which you did not provide? Fix the problems I mentioned in the target code that you did not provide. After that you can look to see if the problem still occurs. Also note that calling FreeLibrary on an invalid pointer (not just on a NULL one) is only one of the problem items I mentioned. .. Ed Quote: pypardo wrote in message news:XnF9866A328CFBE5pypardonospamgmailco (AT) 207 (DOT) 105.83.66... Hi, The problem is NOT that the freelibrary is applied on a NULL pointer. And this small program (in borland.public.attachments) is just a sample to reproduce the problem, it's not our real program. The problem is THAT a call to freelibrary call functions registered by atexit method. This problem only occurs when dynamic RTL is used. Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (Compatibility with MFC) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.