Lazarus
Home
Help
TinyPortal
Search
Login
Register
Lazarus
»
Forum
»
Free Pascal
»
General
(Moderators:
FPK
,
Tomas Hajny
) »
x64 vs x86 storing function pointers
Free Pascal
Website
Downloads
Wiki
Documentation
Bugtracker
Mailing List
Lazarus
Website
Downloads (Laz+FPC)
Packages (OPM)
FAQ
Wiki
Documentation (RTL/FCL/LCL)
Bugtracker
CCR Bugs
IRC channel
GIT
Mailing List
Other languages
Foundation
Website
Useful Wiki Links
Project Roadmap
Getting the Source
Screenshots
How to use the forum
About donations (wiki)
Bookstore
Computer Math and Games in Pascal
(preview)
Lazarus Handbook
Search
Advanced search
Recent
Bad ICONINFO struct in Jw...
by
marcov
[
Today
at 03:00:42 pm]
Initiaiizing records by c...
by
Molochnik
[
Today
at 02:57:28 pm]
Compiler demotes register...
by
marcov
[
Today
at 02:57:18 pm]
Building Lazarus
by
EventHorizon
[
Today
at 02:47:16 pm]
TBRGAAnimatedGif irregula...
by
BobT
[
Today
at 02:41:32 pm]
Fairtris 2: The Ultimate ...
by
furious programming
[
Today
at 02:21:42 pm]
IsManagedType problem, do...
by
ASerge
[
Today
at 02:02:23 pm]
Tpagecontrol descendant
by
dseligo
[
Today
at 01:37:28 pm]
[SOLVED] Combined pointer...
by
CM630
[
Today
at 01:08:17 pm]
F8 step-over sometimes go...
by
Martin_fr
[
Today
at 12:44:27 pm]
Cross compilation error, ...
by
jollytall
[
Today
at 12:41:00 pm]
Lazarus character map
by
dseligo
[
Today
at 12:22:41 pm]
Using WebAssemblies
by
Laprado
[
Today
at 12:11:11 pm]
[Solved] Help with sql
by
magleft
[
Today
at 12:08:27 pm]
android
by
BlueIcaro
[
Today
at 11:41:53 am]
Square Fractal: A bit dif...
by
Boleeman
[
Today
at 10:47:20 am]
Here's some Pong game. Su...
by
Seenkao
[
Today
at 10:16:13 am]
lamw
by
dseligo
[
Today
at 09:35:00 am]
"fpc.cfg is missing" (not...
by
Thaddy
[
Today
at 08:55:31 am]
A question on Modula2 vs ...
by
MarkMLl
[
Today
at 08:39:26 am]
Offical launch of the 1 B...
by
Thaddy
[
Today
at 08:37:40 am]
Indeed TCustomApplication...
by
Gustavo 'Gus' Carreno
[
Today
at 08:22:53 am]
Hypocycloid Program (incl...
by
speter
[
Today
at 05:33:19 am]
Designer
by
SandyG
[
Today
at 03:20:24 am]
Best way to exchange data...
by
cdbc
[
Today
at 03:00:24 am]
« previous
next »
Print
Pages: [
1
]
Author
Topic: x64 vs x86 storing function pointers (Read 971 times)
daobh
Newbie
Posts: 3
x64 vs x86 storing function pointers
«
on:
April 18, 2021, 09:34:13 pm »
Sorry if this is obvious, I've been searching and fiddling and I can't seem to figure it out...
In delphi 5, I can do something like this
Code: Pascal
[Select]
[+]
[-]
var
someprocedure
:
procedure
;
somefunction
:
function
(
a
:
integer
)
:
boolean
;
procedure
LoadAPI
(
var
T
)
;
var
Table
:
array
[
0
..
1
]
of
Pointer
absolute
T
;
begin
someprocedure
:
=
Table
[
0
]
;
somefunction
:
=
Table
[
1
]
;
end
;
But FP balks at the assignments (someprocedure := Table[0]) Is there a simple way to massage this to work or just the verbose route of...
Code: Pascal
[Select]
[+]
[-]
type
someprocedureType
=
procedure
;
somefunctionType
=
function
(
a
:
integer
)
:
boolean
;
var
someprocedure
:
someprocedureType
;
somefunction
:
somefunctionType
;
procedure
LoadAPI
(
var
T
)
;
var
Table
:
array
[
0
..
1
]
of
Pointer
absolute
T
;
begin
someprocedure
:
=
someprocedureType
(
Table
[
0
]
)
;
somefunction
:
=
somefunctionType
(
Table
[
1
]
)
;
end
;
Logged
Jonas Maebe
Hero Member
Posts: 1058
Re: x64 vs x86 storing function pointers
«
Reply #1 on:
April 18, 2021, 09:37:27 pm »
If you use {$mode delphi}, it should compile in FPC as well. In FPC syntax modes, plain pointers are indeed not type-compatible with procedural variables for increased type safety.
Logged
daobh
Newbie
Posts: 3
Re: x64 vs x86 storing function pointers
«
Reply #2 on:
April 18, 2021, 11:16:50 pm »
I'll work on that direction a bit, I tried delphi but was using ObjFPC instead since it ended up getting a little further. Will back track and play around though! Thanks!
Logged
daobh
Newbie
Posts: 3
Re: x64 vs x86 storing function pointers
«
Reply #3 on:
April 19, 2021, 04:56:08 am »
Using -Mdelphi worked after I cleaned up a couple of other minor issues.
- functions declaring var result. commented out.
- some usage of byte(hi(XX)) changed to byte(hi(word(XX))), untested but compiling
Thanks again!
Logged
Print
Pages: [
1
]
« previous
next »
Lazarus
»
Forum
»
Free Pascal
»
General
(Moderators:
FPK
,
Tomas Hajny
) »
x64 vs x86 storing function pointers
TinyPortal
© 2005-2018