www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - Optimisation Bug? - Access Violation - C function pointers

reply J Anderson <REMOVEanderson badmama.com.au> writes:
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Can D understand C function pointers?

With glee I'm finding that many of the extensions aren't working with 
optimisation on. I reduced it down to one sample set of functions but 
there is still a bit of code.  Now the error occurs when optimisation is 
off as well but only with this reduced version.   The weird thing is 
that the error doesn't occur until its left the function being called. 

The major difference between glee and other lib converts I've seen is 
that it uses function pointers.  Oh and another thing.  I did find a 
workaround by wrapping the function pointers in a C function but I would 
really wish to avoid that.

--Test code

import std.process;
import gleetest;
import net.BurtonRadons.dig.main;
import net.BurtonRadons.dig.gl;

class GLFrame : public CanvasGL
{
    this (Control parent)
    {
        super (parent);
        GLeeInit();
        test(); //Access violation when the function exits
        printf("this will not print\n");
    }   
   
    void test()
    {    
        glBeginQueryARB(GL_SAMPLES_PASSED_ARB, 1);
        glEndQueryARB(GL_SAMPLES_PASSED_ARB);
        printf("this will print\n");
    }
}

class Program : public Frame
{
    GLFrame frame;   
    this()
    {    
        //Register frame
        frame = new GLFrame(this);
    }
}

void main( )
{
    Program prog = new Program();
    prog.showModalGame();
   
    std.process.system("pause");
}

-- 
-Anderson: http://badmama.com.au/~anderson/
Jun 12 2004
parent reply Regan Heath <regan netwin.co.nz> writes:
It took me till the second paragraph below to realise 'glee' was a lib of 
some sort, till then I thought you were being sarcastic when you said 
"With glee I'm finding ..."

:)

On Sun, 13 Jun 2004 06:38:28 +0800, J Anderson 
<REMOVEanderson badmama.com.au> wrote:
 Can D understand C function pointers?

 With glee I'm finding that many of the extensions aren't working with
 optimisation on. I reduced it down to one sample set of functions but
 there is still a bit of code.  Now the error occurs when optimisation is
 off as well but only with this reduced version.   The weird thing is
 that the error doesn't occur until its left the function being called.

 The major difference between glee and other lib converts I've seen is
 that it uses function pointers.  Oh and another thing.  I did find a
 workaround by wrapping the function pointers in a C function but I would
 really wish to avoid that.

 --Test code

 import std.process;
 import gleetest;
 import net.BurtonRadons.dig.main;
 import net.BurtonRadons.dig.gl;

 class GLFrame : public CanvasGL
 {
     this (Control parent)
     {
         super (parent);
         GLeeInit();
         test(); //Access violation when the function exits
         printf("this will not print\n");
     }

     void test()
     {
         glBeginQueryARB(GL_SAMPLES_PASSED_ARB, 1);
         glEndQueryARB(GL_SAMPLES_PASSED_ARB);
         printf("this will print\n");
     }
 }

 class Program : public Frame
 {
     GLFrame frame;
     this()
     {
         //Register frame
         frame = new GLFrame(this);
     }
 }

 void main( )
 {
     Program prog = new Program();
     prog.showModalGame();

     std.process.system("pause");
 }

-- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
Jun 13 2004
parent J Anderson <REMOVEanderson badmama.com.au> writes:
Regan Heath wrote:

 It took me till the second paragraph below to realise 'glee' was a lib 
 of some sort, till then I thought you were being sarcastic when you 
 said "With glee I'm finding ..."

 :)

lol -- -Anderson: http://badmama.com.au/~anderson/
Jun 14 2004