CODEWITHSUNDEEP
daccess-violationxlib
user3684240
user3684240

Reputation: 1580

Access violation while using Xlib's XCreateSimpleWindow

I'm trying to use Xlib directly using D and bindings I found on Github (https://github.com/madadam/X11.d).

The problem is that I get an access violation in several functions (e.g. XCreateSimpleWindow). I created a minimal example:

module test;

import X11.Xlib;
import std.stdio;

void main()
{
     Display* d = XOpenDisplay(null);
     assert(!(d is null));
     Window w = XCreateSimpleWindow(d, DefaultRootWindow(d), 0, 0, 200, 100, 0, 0, 0);
}

I use Fedora 20 and dmd 2.066.

Edit 1: @user3661500 asked me to publish the applications' output:

Access violation (dump written)

Hint: I had to translate it because my systems' language is german.

Edit 2: @Adam D. Ruppe: I get a linking error when trying your files:

dmd color.d static.d simpledisplay.d -L-lX11
/usr/bin/ld: color.o: undefined reference to symbol 'XShmPutImage'
/usr/bin/ld: note: 'XShmPutImage' is defined in DSO /lib64/libXext.so.6 so try adding it to the linker command line
/lib64/libXext.so.6: could not read symbols: Invalid operation

Thank you in advance!

Upvotes: 2

Views: 206

Answers (1)

Adam D. Ruppe
Adam D. Ruppe

Reputation: 25595

The Xlib bindings you are using aren't 64-bit compatible. (They use int or long in places where it should be c_long, a common mistake when doing bindings from C as a long in C isn't necessarily the same as a long in D)

You can fix the bindings by finding those instances in the documentation, but easier would be to compile for 32 bit with dmd -m32 or find another set of bindings that are 64 bit compatible. My simpledisplay.d has tackled this problem before, the binding code is found here: https://github.com/adamdruppe/arsd/blob/master/simpledisplay.d#L3605 and is about 1500 lines long.

Upvotes: 1

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