[fpc-pascal] TObjectList works; TFPObjectList gives memory leaks
Hi all, Still working on my file indexer: http://bitbucket.org/jb/flocate/changeset/6c6fa90e632e Each search for files creates a TObjectList descendant (TDirectoryEntryList, see directoryentrylist.pp) On finding a file, the search class createa a DirectoryEntry object with the relevant file properties and adds this to the directoryentrylist. Finally, I iterate through the list and store the results in a database. Then I try to destroy the directoryentrylist, and the directoryentry items get deleted by the Tobjectlist code. This works using a TObjectList; however when I use a TFPObjectList for TDirectoryEntryList, I have a memory leak of exactly all files/objects found that were not released. (This is in FPC 2.5.1/Win32) Am I missing something here? The documentation suggests that TObjectList and TFPObjectlist only differ in some notification stuff... Thanks, -- Regards, jb ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TObjectList works; TFPObjectList gives memory leaks
In our previous episode, Jim said: > > Still working on my file indexer: > http://bitbucket.org/jb/flocate/changeset/6c6fa90e632e The question should be why tobjectlist works. Since you don't set the "freeobjects" anywhere. Call inherited create(true) in your constructor instead of just create(). It would be interesting if you could come up with a little program that really shows the problem (e.g. a small program that changes behaviour if you just prefix "fp"). ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TObjectList works; TFPObjectList gives memory leaks
In our previous episode, Marco van de Voort said: > > Call inherited create(true) in your constructor instead of just create(). Hmm no, that is not it either, since the constructor is overloaded. Then a small example program to test is really needed. If you can reproduce it, please file a bug at http://bugs.freepascal.org ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
[fpc-pascal] Something like g_object_get() in Pascal?
Hello! I have a record containing a set of variables. This record should now be accessed from an application developed in C (through a shared library). Because Pascal records are incompatible with C structs, I could write a get_value() function for each value in the record, e.g. if I have: TTestRec = record val1: String; val2: Integer; end; I would have to write functions like: function testrec_get_val1(rec: TTestRec): String; function testrec_get_val2(rec: TTestRec): Integer; Now the record consists of a lot more than just two properties. The GObject type system knows a much better way for accessing properties: (refer to http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#g-object-get ) I just write the property name as string and add a pointer to the result type: int i; g_object_get(testrec, "val2", &i, NULL); Is there a possibility to get the same function in Pascal to? That I just define one get_value() function which receives the property name as string and outputs the value of it? Thanks & kind regards Matthias ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TObjectList works; TFPObjectList gives memory leaks
On 1-8-2010 14:29, Marco van de Voort wrote: > In our previous episode, Marco van de Voort said: >> >> Call inherited create(true) in your constructor instead of just create(). > > Hmm no, that is not it either, since the constructor is overloaded. Then a > small example program to test is really needed. If you can reproduce it, > please file a bug at http://bugs.freepascal.org True; I also explicitly set the ownsobject property. Nothing changed. I'll try and see what I can do and file a bug if I have something working... (Of course, it could be my newb programming that's causing this, but then I'm extraordinarily lucky that tobjectlist works ;) -- Regards, jb ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Something like g_object_get() in Pascal?
On 01.08.2010 14:45, Matthias Klumpp wrote: > Because Pascal records are incompatible with C structs how are they incompatible? It should be possible to define the same record as a struct in C and for every struct in C it should be possible to define the same as a record in Pascal. Then you could work with pointers to these structs (or records). The difficulty in your example might come from the fact that it involves the usage of strings and pascal will handle strings a bit differently than this is usually done in C. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Something like g_object_get() in Pascal?
On Sun, 01 Aug 2010 19:27:20 +0200, Bernd Kreuss wrote: > On 01.08.2010 14:45, Matthias Klumpp wrote: > >> Because Pascal records are incompatible with C structs > > how are they incompatible? It should be possible to define the same > record as a struct in C and for every struct in C it should be possible > to define the same as a record in Pascal. Then you could work with > pointers to these structs (or records). It does not work here... If I access a PChar in C, I just get an empty string or a wrong pointer. > The difficulty in your example might come from the fact that it involves > the usage of strings and pascal will handle strings a bit differently > than this is usually done in C. I use PChars instead of strings, so this can't cause the problems. Anyway, if you say it works I'll do some tests with it to get it working. Thanks! Matthias ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Something like g_object_get() in Pascal?
On Sun, 01 Aug 2010 19:57:28 +0200, Matthias Klumpp wrote: > On Sun, 01 Aug 2010 19:27:20 +0200, Bernd Kreuss > wrote: >> On 01.08.2010 14:45, Matthias Klumpp wrote: >> >>> Because Pascal records are incompatible with C structs >> >> how are they incompatible? It should be possible to define the same >> record as a struct in C and for every struct in C it should be possible >> to define the same as a record in Pascal. Then you could work with >> pointers to these structs (or records). > It does not work here... If I access a PChar in C, I just get an empty > string or a wrong pointer. > >> The difficulty in your example might come from the fact that it involves >> the usage of strings and pascal will handle strings a bit differently >> than this is usually done in C. > I use PChars instead of strings, so this can't cause the problems. > Anyway, if you say it works I'll do some tests with it to get it working. > Thanks! Aah, I finally found the problem... It was a small bug in my C-code generator. Now everything is fine. > Matthias ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
