On Thu, 20 Mar 2014, Marco van de Voort wrote:
In our previous episode, Michael Van Canneyt said:
Question: what is the best way to maintain code that must compile with
both FPC and Delphi2007?
The obvious solution is to use IFDEF and define a new type, say TMyHandle.
FPC's libraries however take care of many platform differences. Is
there any better way to solve this?
Shortly said: No. The Delphi API is wrong; It should also return THandle
(as that is what Windows CreateFile returns), but probably for historical
reasons they still use Integer.
With the advent of 64-bit delphi, they could have cleaned up their API, but
Alas...
IMHO the universal handle (for e.g. IPC related handles and file handles) is
not a portable concept to begin with.
Normally, I'd expect a TXYZHandle for each 'separate' type.
With XYZ = File, Window, Lib, Module, Directory, Shmem, whatnot.
This should cover most cases.
That these separate types are equal in the background is something the user
need not know.
Michael.
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