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
Why isn't TTIRadioGroup's...
by
egsuh
[
Today
at 08:09:35 am]
splitting an image
by
madref
[
Today
at 08:05:04 am]
FpDebug questions
by
440bx
[
Today
at 03:43:41 am]
Lazarus for Windows on aa...
by
Wallaby
[April 23, 2024, 11:46:56 pm]
Parameter passing odditie...
by
KodeZwerg
[April 23, 2024, 11:04:39 pm]
Can function be used for ...
by
jamie
[April 23, 2024, 10:53:10 pm]
(Solved) TIndexedAVLTree ...
by
lainz
[April 23, 2024, 10:49:03 pm]
Demo Scene Picture sinwav...
by
KodeZwerg
[April 23, 2024, 10:26:21 pm]
fkInternalCalc
by
zraja
[April 23, 2024, 09:31:07 pm]
A fairly simple sound sol...
by
KodeZwerg
[April 23, 2024, 09:23:37 pm]
add new targets to make
by
marcov
[April 23, 2024, 08:38:42 pm]
how to tweek fpmake to co...
by
marcov
[April 23, 2024, 08:29:16 pm]
Quirky windows
by
ASerge
[April 23, 2024, 07:07:16 pm]
[Request] Demo Scene Sub ...
by
Gigatron
[April 23, 2024, 06:29:39 pm]
Unlocking Files
by
KodeZwerg
[April 23, 2024, 06:03:08 pm]
[SOLVED] trunk bug for mi...
by
Key-Real
[April 23, 2024, 05:56:32 pm]
Demo Scene Bitmap Font Sc...
by
Gigatron
[April 23, 2024, 05:56:27 pm]
Compile/Convert Delphi pr...
by
Martin_fr
[April 23, 2024, 05:43:11 pm]
Generics - correct syntax
by
Thaddy
[April 23, 2024, 05:40:59 pm]
InstallAware Using Lazaru...
by
msintle
[April 23, 2024, 05:26:36 pm]
Xcode Command Line Tools ...
by
Joseph
[April 23, 2024, 05:16:39 pm]
Offical launch of the 1 B...
by
Hartmut
[April 23, 2024, 04:49:29 pm]
what to do if my target M...
by
nickysn
[April 23, 2024, 04:16:02 pm]
compiler error in unit
by
paule32
[April 23, 2024, 03:49:50 pm]
Multithreading - synchron...
by
mika
[April 23, 2024, 01:48:51 pm]
« previous
next »
Print
Pages: [
1
]
Author
Topic: x64 vs x86 storing function pointers (Read 1002 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: 1059
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