Re: [Lazarus] Finding memory leaks
Yea it remove and even I remove all of the list items it get the same result. So Michael, what should I do about this? How can I really free it ? Regards, Ara -- http://www.fastmail.com - Same, same, but different... -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
On 10/24/2015 03:10 PM, Aradeonas wrote: My question stand but I guess problem is in TObjectList but Im not sure so I made a simple demo like this: procedure TForm1.Button1Click(Sender: TObject); var i: integer; b: TButton; begin list := TObjectList.Create(True); for i := 0 to 1 do begin b := TButton.Create(Self); list.Add(b); end; end; procedure TForm1.Button2Click(Sender: TObject); begin list.Clear; list.Free; end; Form is clean and just have 2 button with their code so I run it and memory usage in my Windows10 device is about 3mb and then hit the button1 and memory goes up to 25mb and when I want to free and hit button2 memory will decrease to 15mb not 3 , just like my main program that I use TObjectList and will free its objects with remove function but it will increase memory usage while running. Did I miss something obvious? Maybe TObjectlist.Clear does not free objects, in that case you have to iterate through TObjectList and use Remove() which will free objects ? zeljko -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
On Sun, 25 Oct 2015, Zeljko wrote: On 10/24/2015 03:10 PM, Aradeonas wrote: My question stand but I guess problem is in TObjectList but Im not sure so I made a simple demo like this: procedure TForm1.Button1Click(Sender: TObject); var i: integer; b: TButton; begin list := TObjectList.Create(True); for i := 0 to 1 do begin b := TButton.Create(Self); list.Add(b); end; end; procedure TForm1.Button2Click(Sender: TObject); begin list.Clear; list.Free; end; Form is clean and just have 2 button with their code so I run it and memory usage in my Windows10 device is about 3mb and then hit the button1 and memory goes up to 25mb and when I want to free and hit button2 memory will decrease to 15mb not 3 , just like my main program that I use TObjectList and will free its objects with remove function but it will increase memory usage while running. Did I miss something obvious? There is a difference between releasing an object in heap memory, and returning that memory to the OS: It's not because you've released the memories from the various objects in the list, that the memory used by these objects is returned to the OS. So what you observe is not necessarily an indication of a memory leak. TObjectList does remove the objects from memory in a Clear. If that would not work properly, we'd have heard a long time ago :) Michael. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
On Sun, 25 Oct 2015, Aradeonas wrote: Use another memory manager (?) Can you explain more or give an example? For example: Just add cmem as the first unit in the uses clause, and you will be using the C memory manager. It uses different algorithms. You can write your own. But that is harder. Michael. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Working on big units
On 2015-10-25 00:58, Anthony Walter wrote: > Graeme, all browsers (except opera mini) support h.264 now: Yes and No. The difference between OGV & WebM vs H264 is that H264 requires external libraries for it to work. Especially on Linux or FreeBSD (read the fine print... appropriate gstreamer plug-ins are required). On the other hand, OGV and WebM (I think) are fully baked into the browser source code - just like JPG or GIF support. At least for Opera, Chrome and Firefox. Anything MPEG and H264 are patent nightmares and requires licensing. Do some Google searching to find out more - there are tons of information, especially for content producers (somebody making video files). Regards, - Graeme - -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://fpgui.sourceforge.net/ My public PGP key: http://tinyurl.com/graeme-pgp -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
> I checked all of my objects and I free them,also I used DumpHeap for finding memory leaks but its a big report and many other simple programs have many report like this and I cant find anything good in it. The leak reports lines from both your app and the underlying library you use, i.e. LCL. Find the one from your app (./include/customcontrol.inc, ./include/whatever.inc certainly don't belong to your app), that's where you should start tracing. It's sometimes obvious, sometimes not, no generalization possible. -- View this message in context: http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Finding-memory-leaks-tp4044940p4044955.html Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com. -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
On 25.10.2015 14:36, Aradeonas wrote: Yea it remove and even I remove all of the list items it get the same result. So Michael, what should I do about this? How can I really free it ? Use another memory manager (?) Ondrej -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
> Use another memory manager (?) Can you explain more or give an example? Regards, Ara -- http://www.fastmail.com - Accessible with your email software or over the web -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
Re: [Lazarus] Finding memory leaks
On 25.10.2015 17:29, Aradeonas wrote: Use another memory manager (?) Can you explain more or give an example? The memory manager decides about how to allocate and release memory from/back to system. https://www.google.at/search?q=fpc+memory+manager http://www.freepascal.org/docs-html/3.0.0/prog/progsu176.html But I am not an expert in this topic. I was always happy with the default FPC memory manager and FastMM in Delphi. Ondrej -- ___ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
