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
how to change the color f...
by
cdbc
[
Today
at 12:02:27 pm]
Understanding and adjusti...
by
ArchChem
[
Today
at 11:49:35 am]
Offical launch of the 1 B...
by
abouchez
[
Today
at 11:14:35 am]
STARS and Regular POLYGON...
by
KodeZwerg
[
Today
at 11:13:35 am]
Free AI to use in local
by
Thaddy
[
Today
at 11:05:25 am]
Using KeyPress event, how...
by
KodeZwerg
[
Today
at 10:44:31 am]
Controlling the behavior ...
by
rvk
[
Today
at 08:31:48 am]
A "leisure" question on W...
by
Awkward
[
Today
at 07:59:12 am]
Big Numbers Math
by
Thaddy
[
Today
at 07:22:49 am]
Parquet?
by
Thaddy
[
Today
at 07:11:17 am]
Project fails on run but ...
by
jamie
[
Today
at 12:54:49 am]
Curling Pythagoras Tree: ...
by
Boleeman
[
Today
at 12:00:37 am]
Ribbon bar in Lazarus 3.2...
by
wp
[March 28, 2024, 11:29:17 pm]
how to search in rxmemory...
by
rcmz
[March 28, 2024, 10:19:54 pm]
Configure JCF messages
by
GordonFindlay
[March 28, 2024, 10:16:19 pm]
Poll: Watches and Display...
by
Martin_fr
[March 28, 2024, 10:15:08 pm]
Dialog ShowModal and an i...
by
d7_2_laz
[March 28, 2024, 09:51:39 pm]
JEDI error but unit compi...
by
Thaddy
[March 28, 2024, 09:30:33 pm]
Dynarray initialization p...
by
Thaddy
[March 28, 2024, 06:30:12 pm]
Zeos components. Had to c...
by
Fantablup
[March 28, 2024, 04:17:13 pm]
[SOLVED] Completion box s...
by
furious programming
[March 28, 2024, 04:12:26 pm]
[LAMW] How to create a ca...
by
af0815
[March 28, 2024, 03:48:16 pm]
Complex package installat...
by
wp
[March 28, 2024, 03:38:16 pm]
[SOLVED] Combined pointer...
by
CM630
[March 28, 2024, 02:48:41 pm]
a Unit problem?
by
Thaddy
[March 28, 2024, 01:56:12 pm]
« previous
next »
Print
Pages: [
1
]
Author
Topic: x64 vs x86 storing function pointers (Read 975 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