Re: [fpc-pascal] Is this a reference counting bug?
Bihar Anwar bihar_an...@rocketmail.com Moreover, I've seen many Delphi code snippets out there (e.g. http://www.cs.wisc.edu/~rkennedy/array-delete) rely on reference counting behaviour. Great. I once wrote code that relied on Turbo Pascal's heap list structure internals. Shall I post a bug report that this doesn't work anymore in FreePascal (and not even in BP7, IIRC) or shall I simply write it off as intentionally compiler-dependent and non-portable? Vinzent. -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01 ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is this a reference counting bug?
Florian Klaempfl: FPC and Delphi handle code generation for ref. counted types slightly different, so there might be cases where the ref. counter differs. As long as there is no memory leak when the vars are properly used, we don't consider it as a bug. I see, well, there should be explanation about this in FPC doc. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is this a reference counting bug?
On 02 May 2010, at 10:30, Bihar Anwar wrote: I see, well, there should be explanation about this in FPC doc. The reference counting logic is considered to be an opaque implementation detail (whose implementation can change at any time). It is undocumented by design. Jonas___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is this a reference counting bug?
On May 2, 2010 4:24:37 PM, Jonas Maebe wrote: The reference counting logic is considered to be an opaque implementation detail (whose implementation can change at any time). It is undocumented by design. In fact, it was already documented in detail in FPC Language Reference Guide: 3.2.4 Ansistrings; 3.3.1 Arrays: Dynamic Array; 7.6 Reference counting. Moreover, I've seen many Delphi code snippets out there (e.g. http://www.cs.wisc.edu/~rkennedy/array-delete) rely on reference counting behaviour. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is this a reference counting bug?
On 02 May 2010, at 13:46, Bihar Anwar wrote: On May 2, 2010 4:24:37 PM, Jonas Maebe wrote: The reference counting logic is considered to be an opaque implementation detail (whose implementation can change at any time). It is undocumented by design. In fact, it was already documented in detail in FPC Language Reference Guide: 3.2.4 Ansistrings; 3.3.1 Arrays: Dynamic Array; 7.6 Reference counting. And the last one explicitly states No assumptions should be made about the number of temporary variables or the time when they are finalized. Moreover, I've seen many Delphi code snippets out there (e.g. http://www.cs.wisc.edu/~rkennedy/array-delete) rely on reference counting behaviour. I know, we've had bug reports about that in the past. Such code is simply broken. See e.g. http://bugs.freepascal.org/view.php?id=15526 and http://bugs.freepascal.org/view.php?id=9472 Jonas___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is this a reference counting bug?
On 02 May 2010, at 14:05, Jonas Maebe wrote: I know, we've had bug reports about that in the past. Such code is simply broken. See e.g. http://bugs.freepascal.org/view.php?id=15526 andhttp://bugs.freepascal.org/view.php?id=9472 And the thread starting with http://www.mail-archive.com/fpc-de...@lists.freepascal.org/msg11126.html Jonas___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is this a reference counting bug?
From: Jonas Maebe, May 2, 2010 7:05:46 PM And the last one explicitly states No assumptions should be made about the number of temporary variables or the time when they are finalized. I see, thanks Jonas for noting that statements. I know, we've had bug reports about that in the past. Such code is simply broken. See e.g. http://bugs.freepascal.org/view.php?id=15526 and http://bugs.freepascal.org/view.php?id=9472 Thanks also for the your emphatic statement, and the links, of course. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
