[fpc-pascal] fpGetTimeOfDay
Are there any known issues with this sort of thing fpGetTimeOfDay (@TimeVal, nil) on various platforms? FPC 2.6.4 and 2.7.1 seem to be OK on x86, but on x64 (and FWIW SPARC, haven't tested others) it appears to be returning a fixed TimeVal plus a result of zero even if there are several seconds between calls. -- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] fpGetTimeOfDay
Marco van de Voort wrote: In our previous episode, Mark Morgan Lloyd said: Are there any known issues with this sort of thing fpGetTimeOfDay (@TimeVal, nil) on various platforms? FPC 2.6.4 and 2.7.1 seem to be OK on x86, but on x64 (and FWIW SPARC, haven't tested others) it appears to be returning a fixed TimeVal plus a result of zero even if there are several seconds between calls. My FreeBSD manpage says: ... If tp or tzp is NULL, the associated time information will not be returned or set. The Linux manpage words it differently: If either tv or tz is NULL, the corresponding structure is not set or returned. (However, compilation warnings will result if tv is NULL.) The funny thing is that the snippet of code that I'm using was contributed by you, and that it works fine on multiple versions of x86 kernel. http://lists.freepascal.org/pipermail/fpc-pascal/2007-February/013356.html -- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] License terms for FastHTMLParser
On 03/08/2015 11:23 AM, Christo wrote: While reading up on the history of FastHTMLParser (to find out who/where the root owner of this unit is) I noticed that the last release (0.4) from Jazarsoft (http://web.archive.org/web/20050112010608/http://www.jazarsoft.com/download/fasthtmlparser-0.4-delphi.zip) has a permissive license, while the file in the FPC source tree has the GPL pasted at the top. I also see that Andrew Haines is listed as the copyright holder in the FPC source, while the original file listed Jazarsoft. I know Andrew developed the chm support in FPC/Lazarus, but it seems as if he isn't the original author of this unit. I think the original license copyright should be restored for this unit, any comments? Best wishes, Christo I probably pasted the license by mistake when I was adding it to the rest of the files. I submitted a bug report that removes it. Regards, Andrew Haines ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] fpGetTimeOfDay
In our previous episode, Mark Morgan Lloyd said: Are there any known issues with this sort of thing fpGetTimeOfDay (@TimeVal, nil) on various platforms? FPC 2.6.4 and 2.7.1 seem to be OK on x86, but on x64 (and FWIW SPARC, haven't tested others) it appears to be returning a fixed TimeVal plus a result of zero even if there are several seconds between calls. My FreeBSD manpage says: ... If tp or tzp is NULL, the associated time information will not be returned or set. The Linux manpage words it differently: If either tv or tz is NULL, the corresponding structure is not set or returned. (However, compilation warnings will result if tv is NULL.) ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] fpGetTimeOfDay
On Mon, Mar 09, 2015 at 01:30:28PM +0100, Marco van de Voort wrote: In our previous episode, Mark Morgan Lloyd said: Are there any known issues with this sort of thing fpGetTimeOfDay (@TimeVal, nil) on various platforms? FPC 2.6.4 and 2.7.1 seem to be OK on x86, but on x64 (and FWIW SPARC, haven't tested others) it appears to be returning a fixed TimeVal plus a result of zero even if there are several seconds between calls. My FreeBSD manpage says: ... If tp or tzp is NULL, the associated time information will not be returned or set. The Linux manpage words it differently: If either tv or tz is NULL, the corresponding structure is not set or returned. (However, compilation warnings will result if tv is NULL.) Well that's obvious, you can't dereference a NULL so there's nothing to set. The tz parameter is obsolete, it should normally be NULL. Henry ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] how to use procedure of object in C
Hi all, I define a procedure like this: type TDataHandler = procedure(data: Pointer) of object; procedure SetHandler(h: TDataHandler); external cdecl; Now, can I implement SetHandler in a library written in C, then call h in C? Thankyou. -- Sent from Gmail Mobile ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] fpGetTimeOfDay
In our previous episode, Mark Morgan Lloyd said: If either tv or tz is NULL, the corresponding structure is not set or returned. (However, compilation warnings will result if tv is NULL.) The funny thing is that the snippet of code that I'm using was contributed by you, and that it works fine on multiple versions of x86 kernel. http://lists.freepascal.org/pipermail/fpc-pascal/2007-February/013356.html Yes, I read wrong. Only the corresponding structure is not updated apparently, not both. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Warning Local variable seems to be not initialized on dyn array
Am 2015-03-09 um 18:31 schrieb Jonas Maebe: On 09 Mar 2015, at 17:49, Jürgen Hestermann juergen.hesterm...@gmx.de wrote: Am 2015-03-09 um 17:40 schrieb Jonas Maebe: http://bugs.freepascal.org/view.php?id=24601#c75617 (and the comment below + use -vq to see warning numbers, and -vm to block a particular warning number). Thanks for the answer. But still: Why is there such a warning for managed types at all? That is the same question you asked in your original mail and which is answered in the bug report comment I linked in reply. Not quite. In the bug comment you wrote: The warning is by design for all kinds of variables and regardless of their storage location (as noted by the original submitter, global/static variables of any kind are always initialised by 0/nil/...). The warning means that no value has been explicitly assigned to these variables (which may indicate a logic error in the code), not necessarily that they contain an unpredictable value. But still there is the question *why* this design exists? I think it is a bad design. It should know that managed types *are* initialized and not raise a warning in this case. Why generate a warning with an incorrect statement? Am I forced to add (superfluous) initialization code or somehow suppress this kind of warning just to get rid of this false warnings which are useless from the beginning? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Warning Local variable seems to be not initialized on dyn array
Am 2015-03-09 um 17:40 schrieb Jonas Maebe: On 09 Mar 2015, at 17:25, Jürgen Hestermann wrote: I get a warning that a local dynamic array variable is not initialized. Aren't such managed types initialized by default? On http://wiki.freepascal.org/Dynamic_array it says: Actually, dynamic arrays are pointers with automatic dereferencing. They are initialized to *nil* automatically. So why the warning? http://bugs.freepascal.org/view.php?id=24601#c75617 (and the comment below + use -vq to see warning numbers, and -vm to block a particular warning number). Thanks for the answer. But still: Why is there such a warning for managed types at all? Dynamic arrays are initialized by default so the warning text is simply wrong. It IS initialized and the compiler knows this. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] how to use procedure of object in C
On 09 Mar 2015, at 18:43, Michael Van Canneyt wrote: You must be sure that self is passed in the correct register. I am not sure this is the case if you declare it as an extra argument. It is, as long as the `self` is the first parameter. Same goes for `Class Procedure XXX;` kind of declarations (in constrast to `Class procedure XXX; static;`). I don't know how long that is going to last however (since this hidden parameter thingy is an implementation detail of the compiler I think). So I fully agree: it would be a kindness of the compiler people to confirm this :-) -- Ewald ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Warning Local variable seems to be not initialized on dyn array
On 09 Mar 2015, at 17:49, Jürgen Hestermann juergen.hesterm...@gmx.de wrote: Am 2015-03-09 um 17:40 schrieb Jonas Maebe: http://bugs.freepascal.org/view.php?id=24601#c75617 (and the comment below + use -vq to see warning numbers, and -vm to block a particular warning number). Thanks for the answer. But still: Why is there such a warning for managed types at all? That is the same question you asked in your original mail and which is answered in the bug report comment I linked in reply. Jonas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Warning Local variable seems to be not initialized on dyn array
I would think this part answers that question: The warning means that no value has been *explicitly* assigned to these variables (which *may indicate a logic error* in the code), not necessarily that they contain an unpredictable value. (emphasis mine) Jeff. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Warning Local variable seems to be not initialized on dyn array
On 09 Mar 2015, at 17:25, Jürgen Hestermann wrote: I get a warning that a local dynamic array variable is not initialized. Aren't such managed types initialized by default? On http://wiki.freepascal.org/Dynamic_array it says: Actually, dynamic arrays are pointers with automatic dereferencing. They are initialized to *nil* automatically. So why the warning? http://bugs.freepascal.org/view.php?id=24601#c75617 (and the comment below + use -vq to see warning numbers, and -vm to block a particular warning number). Jonas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] how to use procedure of object in C
On Mon, 9 Mar 2015, OBones wrote: Michael Van Canneyt wrote: On Mon, 9 Mar 2015, Xiangrong Fang wrote: Hi all, I define a procedure like this: type TDataHandler = procedure(data: Pointer) of object; procedure SetHandler(h: TDataHandler); external cdecl; Now, can I implement SetHandler in a library written in C, then call h in C? IMHO Not without separate assembler code for each CPU. Michael. How about using TMethod? procedure DataHandler(DummySelf: Pointer; data: Pointer); begin // do what you want to do, DummySelf is always nil. end; var Method: TMethod; begin Method.Data := nil; Method.Code := @DataHandler; SetHandler(TDataHandler(Method)); end; You must be sure that self is passed in the correct register. I am not sure this is the case if you declare it as an extra argument. It may be so, but compiler people should confirm this. I don't think you can take it for granted. Michael. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] how to use procedure of object in C
On Mon, 9 Mar 2015, Xiangrong Fang wrote: Hi all, I define a procedure like this: type TDataHandler = procedure(data: Pointer) of object; procedure SetHandler(h: TDataHandler); external cdecl; Now, can I implement SetHandler in a library written in C, then call h in C? IMHO Not without separate assembler code for each CPU. Michael.___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] Warning Local variable seems to be not initialized on dyn array
I get a warning that a local dynamic array variable is not initialized. Aren't such managed types initialized by default? On http://wiki.freepascal.org/Dynamic_array it says: Actually, dynamic arrays are pointers with automatic dereferencing. They are initialized to *nil* automatically. So why the warning? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] how to use procedure of object in C
Michael Van Canneyt wrote: On Mon, 9 Mar 2015, Xiangrong Fang wrote: Hi all, I define a procedure like this: type TDataHandler = procedure(data: Pointer) of object; procedure SetHandler(h: TDataHandler); external cdecl; Now, can I implement SetHandler in a library written in C, then call h in C? IMHO Not without separate assembler code for each CPU. Michael. How about using TMethod? procedure DataHandler(DummySelf: Pointer; data: Pointer); begin // do what you want to do, DummySelf is always nil. end; var Method: TMethod; begin Method.Data := nil; Method.Code := @DataHandler; SetHandler(TDataHandler(Method)); end; ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] how to use procedure of object in C
2015-03-10 0:33 GMT+08:00 OBones obo...@free.fr: How about using TMethod? procedure DataHandler(DummySelf: Pointer; data: Pointer); begin // do what you want to do, DummySelf is always nil. end; var Method: TMethod; begin Method.Data := nil; Method.Code := @DataHandler; SetHandler(TDataHandler(Method)); end; I'm not sure how this works, but it seems that you are deliberately converting a normal procedure to a method. What I want is exactly opposite - I want to convert a method to a normal procedure. If I define the interfact of DataHandler like this: TDataHandler = procedure(data: Pointer); cdecl; It is very easy to use in an so, no matter it is written in C or pascal. But the problem is, I want to do this: SetHandler(h); where h is a METHOD, not a normal procedure. Because I want to use the handler wrapped in my Class. However, like in my first mail, if I define THandler a procedure of object, it makes easier to SetHandler(AMethod); but how can I use that procedure of object pointer in the so? Thanks! ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] FPC embedded ?
On 03/07/2015 05:20 PM, Adriaan van Os wrote: Also for low-power battery-powered devices ? PIC32MX5XX/6XX/7XX Datasheet: Power Management: Low-power management modes (Sleep and Idle) Integrated Power-on Reset, Brown-out Reset 0.5 mA/MHz dynamic current (typical) 41 μA IPD current (typical) -Michael ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
