[fpc-devel] THandle and 64bit platforms

[Florian Klaempfl]

Peter Vreman wrote:

>>>That said, the RTL should also avoid confusion with the Windows/Delphi
>>>THandle type, and introduce a cross-platform and opaque TFileHandle
>>>type.
>>
>>It's text/file/file of in pascal ;)
>>
>>
>>>Which will happen to be equal to THandle on 32-bit windows.
>>>On 32-bit Linux, the definition of THandle will then also equal
>>>TFileHandle.
>>>
>>>This will also take some work :-)
>>
>>I guess this is no solution. It makes porting delphi apps very hard.
>>What's the problem if thandle is 64 bit on 64 bit systems? You can still
>>store a 32 bit file handle in it.
> 
> 
> It'll give a lot of Warnings when compiling the sources. And there is a
> risk for rangecheck errors.
> 
> I checked Kylix, there THandle=longword which is also incompatible with
> our THandle=longint under Linux.
> 
> My proposal is to rename the current THandle to TFileHandle. And add an
> platform independent type "THandle=PtrUInt".
> Note that this can still cause range check errors under Unix, because
> invalid filedescriptors have (normally) value -1.

Sounds good to me.