BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How do i make sure Buffer is ONLY in memory?          BorlandTalk.com Forum Index -> C++ Builder (Language C++) View previous topic :: View next topic   Author Message Daniel Guest Posted: Sat Jun 11, 2005 6:21 pm    Post subject: How do i make sure Buffer is ONLY in memory? Hello, While running i need to create a buffer that will hold data, and i need to do lot of calculations on this buffer, i need it to be as fast as possible, and i need that the buffer will also be as large as possible to hold as much data as it possibly can. Now the problem is this, as i understand if i declare on a very large buffer and fills if with data, like this for example - double *HugeBuffer = new double[0xFFFFFFFFFFFFFFFFFFFFFF]; Fills HugeBuffer[] with data from file... then becouse the PC doesn't have so much memory it will use part of the Hard-Drive to hold this buffer data, but that will slow down my calculations right? so i want to make sure that all the data in my application while running is presents ONLY in the PC real memory and not on the hard disk, i don't want the program to waste time approaching the hard disk reading and writing data to the buffer. So How do i detect what is the largest size of buffer that i can use that will not use the hard drive space? i guess that it can be change from one running to another depends on the amount of memory which is in used at that moment. Thanks, Dani. Back to top Liz Albin Guest Posted: Sat Jun 11, 2005 6:43 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? On 11 Jun 2005 11:21:00 -0700, Daniel wrote: Quote: So How do i detect what is the largest size of buffer that i can use that will not use the hard drive space? i guess that it can be change from one running to another depends on the amount of memory which is in used at that moment. I believe that this question is more appropriate to the nativeapi group. Meanwhile, check out memory allocation and virtual memory functions in the Win32 SDK developer's reference help. VirtualAlloc() VirtualLock() etc may be of help to you -- Good luck, liz Back to top Daniel Guest Posted: Sat Jun 11, 2005 7:10 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? Thanks, i'll ask it again in nativeapi group. SDK, does it means that i have to download (for free?) and install new components to my builder? Dani. Liz Albin <lizalbin (AT) yahooNotThis (DOT) com> wrote: Quote: On 11 Jun 2005 11:21:00 -0700, Daniel wrote: I believe that this question is more appropriate to the nativeapi group. Meanwhile, check out memory allocation and virtual memory functions in the Win32 SDK developer's reference help. VirtualAlloc() VirtualLock() etc may be of help to you -- Good luck, liz Back to top Liz Albin Guest Posted: Sat Jun 11, 2005 7:41 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? On 11 Jun 2005 12:10:20 -0700, Daniel wrote: Quote: Thanks, i'll ask it again in nativeapi group. SDK, does it means that i have to download (for free?) and install new components to my builder? Dani. No, that's part of your Windows installation -- Good luck, liz Back to top Ed Mulroy Guest Posted: Sat Jun 11, 2005 7:54 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? Quote: SDK, does it means that i have to download (for free?) and install new components to my builder? It means you have to read the Windows help file that came with the compiler and use the functions that do what you want. .. Ed Quote: Daniel wrote in message news:42ab371c$1 (AT) newsgroups (DOT) borland.com... Thanks, i'll ask it again in nativeapi group. SDK, does it means that i have to download (for free?) and install new components to my builder? Back to top Daniel Guest Posted: Sat Jun 11, 2005 9:00 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? Thanks Liz, do you know if this command works on Windows-xp ? See a reply of TeamB member on this subject - Quote: Is there a way to allocate 'real' memory? Yes. Write a kernel-mode device driver. That's the only way to get "real" memory in Win32. Alternatively look at VirtualLock - but that is only implemented as a stub on Windows PlayStation (Win9x) and does not *guarantee* memory locking on Windows NT (AFAIR). ============ and how do i write a kernel-mode device driver? Thanks, Dani. Liz Albin <lizalbin (AT) yahooNotThis (DOT) com> wrote: Quote: On 11 Jun 2005 12:10:20 -0700, Daniel wrote: Thanks, i'll ask it again in nativeapi group. SDK, does it means that i have to download (for free?) and install new components to my builder? Dani. No, that's part of your Windows installation -- Good luck, liz Back to top Deniel Guest Posted: Sat Jun 11, 2005 9:01 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? Thanks. "Ed Mulroy" <dont_email_me (AT) bitbuc (DOT) ket> wrote: Quote: SDK, does it means that i have to download (for free?) and install new components to my builder? It means you have to read the Windows help file that came with the compiler and use the functions that do what you want. . Ed Back to top Rudy Velthuis [TeamB] Guest Posted: Sun Jun 12, 2005 8:06 am    Post subject: Re: How do i make sure Buffer is ONLY in memory? At 23:00:05, 11.06.2005, Daniel wrote: Quote: Alternatively look at VirtualLock - but that is only implemented as a stub on Windows PlayStation (Win9x) and does not guarantee memory locking on Windows NT (AFAIR). Was that TeamB member called Stefan or Peter? <g> -- Rudy Velthuis [TeamB] http://velthuis.homepage.t-online.de "We don't make mistakes, we just have happy little accidents." -- Bob Ross, "The Joy of Painting" Back to top Deniel Guest Posted: Sun Jun 12, 2005 7:03 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? Actually no, here is the original message that i found very quickly by using google newsgroups search - TeamB Jul 6 1999, 3:00 am Newsgroups: borland.public.cppbuilder.winapi From: Stefan.Hoffmeis... (AT) Econos (DOT) de (Stefan Hoffmeister (TeamB)) - Find messages by this author Date: 1999/07/06 Subject: Re: Avoiding Windows memory paging Reply to Author | Forward | Print | Individual Message | Show original | Report Abuse : "Boaz Sommer" <Boaz.Som... (AT) dspis (DOT) co.il> wrote: Quote: Is there a way to allocate 'real' memory? Yes. Write a kernel-mode device driver. That's the only way to get "real" memory in Win32. Alternatively look at VirtualLock - but that is only implemented as a stub on Windows PlayStation (Win9x) and does not *guarantee* memory locking on Windows NT (AFAIR). -- Stefan Hoffmeister (TeamB) http://www.econos.de/ Please do apply judgement when sending email. Quote: Was that TeamB member called Stefan or Peter? -- Rudy Velthuis [TeamB] http://velthuis.homepage.t-online.de "We don't make mistakes, we just have happy little accidents." -- Bob Ross, "The Joy of Painting" Back to top Rudy Velthuis [TeamB] Guest Posted: Sun Jun 12, 2005 7:53 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? At 21:03:49, 12.06.2005, Deniel wrote: Quote: Actually no, here is the original message I was right, it was Stefan. <g> -- Rudy Velthuis [TeamB] http://velthuis.homepage.t-online.de "If the automobile had followed the same development cycle as the computer, a Rolls-Royce would today cost $100, get a million miles per gallon, and explode once a year, killing everyone inside." -- Robert X. Cringely. Back to top Deniel Guest Posted: Sun Jun 12, 2005 8:37 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? Ooooops Sorry, you where right after all... What is this <g> sign? what does it means? Dani. "Rudy Velthuis [TeamB]" <velthuis (AT) gmail (DOT) com> wrote: Quote: At 21:03:49, 12.06.2005, Deniel wrote: Actually no, here is the original message I was right, it was Stefan. -- Rudy Velthuis [TeamB] http://velthuis.homepage.t-online.de "If the automobile had followed the same development cycle as the computer, a Rolls-Royce would today cost $100, get a million miles per gallon, and explode once a year, killing everyone inside." -- Robert X. Cringely. Back to top Rudy Velthuis [TeamB] Guest Posted: Sun Jun 12, 2005 8:48 pm    Post subject: Re: How do i make sure Buffer is ONLY in memory? At 22:37:56, 12.06.2005, Deniel wrote: Quote: Ooooops Sorry, you where right after all... What is this <g> sign? what does it means? Short for <grin> or <grinning>. An older way to denote a smiley. -- Rudy Velthuis [TeamB] http://velthuis.homepage.t-online.de "Friends applaud, the Comedy is over." - Ludwig von Beethoven, dying words 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 (Language C++) 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.