global static pointer variable in DLL

[Zarathustra]

torhu Wrote:

> Zarathustra wrote:
> > torhu Wrote:
> > 
> >> Zarathustra wrote:
> >> > 
> >> > Oh, I find out something.
> >> > The most crashes occur in similar calls (in DLL) like following:
> >> > ________________________________________________________
> >> > offs += fprintf(gl2ps->stream, "%%PDF-1.4\n");
> >> > ________________________________________________________
> >> > it looks like DLL haven't got access to FILE(gl2ps->stream), but why?
> >> > The FILE is operand of gl2psBeginPage.
> >> > Call of gl2psBeginPage function in my D code is in following function:
> >> > ________________________________________________________
> >> > extern (C) void
> >> > SaveFile(){
> >> > 	FILE* fp;
> >> > 	int state = GL2PS_OVERFLOW;
> >> > 	int buffsize = 0;
> >> >             		
> >> > 	try{
> >> > 		fp = fopen("out.pdf", "wb");
> >> > 		while(state == GL2PS_OVERFLOW){
> >> > 			buffsize += 1024*1024;
> >> > 
> >> > 			gl2psBeginPage(
> >> > 				"test", 
> >> > 				"gl2psTestSimple", 
> >> > 				null, 
> >> > 				GL2PS_PDF, 
> >> > 				GL2PS_SIMPLE_SORT,
> >> > 				GL2PS_DRAW_BACKGROUND | GL2PS_USE_CURRENT_VIEWPORT,
> >> > 				GL_RGBA, 
> >> > 				0, 
> >> > 				null, 
> >> > 				0, 
> >> > 				0, 
> >> > 				0, 
> >> > 				buffsize, 
> >> > 				fp, 
> >> > 				"out.pdf"
> >> > 			);
> >> > 			
> >> > 			RenderFrame();
> >> > 			state = gl2psEndPage();
> >> > 		}
> >> > 		fclose(fp);
> >> > 		MessageBoxA(null, "File saved", "Information", MB_OK | MB_ICONINFORMATION);
> >> > 	}
> >> > 	catch(Object o){
> >> > 		MessageBoxA(null, cast(char*)o.toString(), "Critical Error", MB_OK | MB_ICONERROR);
> >> > 	}
> >> > }
> >> > ________________________________________________________
> >> > exactly: gl2ps->stream = fp;
> >> > 
> >> 
> >> Have you tried debugging this code with ddbg, and checked what the 
> >> actual values of gl2ps and gl2ps->stream are when it crashes?
> >> 
> >> http://ddbg.mainia.de/
> > 
> > I converted all gl2ps code to d and then started debugging with ddbg.
> > I have got a problem with allocating memory. I have got the following code:
> > 
> > if(gl2ps.bgcolor is cast(GL2PSrgba*)null){
> >     gl2ps.bgcolor = cast(GL2PSrgba*)malloc(GL2PSrgba.sizeof);
> > }
> > 
> > and error:
> > Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at ?Alloc at RTLPool@@QAEPAXXZ (0x0042e8a9) thread(5368)
> > 
> > I don't know what does it mean.
> > 
> > 
> 
> Does it crash on the malloc line?  Maybe you've got heap corruption. 
> You could check for stray pointers or buffer overflows.  Maybe someone 
> else recognizes this error and can tell you more, because I might be 
> completely wrong about this.

Ok I resolved this problem by change std.c.stdlib.malloc on std.gc.malloc.
But now I still have a problem with fprintf() functions.
code:
________________________________________________________
offs = fprintf(gl2ps.stream,
                 "1 0 obj\n<<\n/Title (%s)\n/Creator (GL2PS %d.%d.%d%s, %s)\n/Producer (%s)\n",
                 gl2ps.title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
                 GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
                 gl2ps.producer);
________________________________________________________
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at _strlen (0x0042a37d) thread(3380)

but when I change it:
code
________________________________________________________
  offs = fprintf(gl2ps.stream,
                 /*"1 0 obj\n<<\n/Title (%s)\n/Creator (GL2PS %d.%d.%d%s, %s)\n/Producer (%s)\n",*/
                 gl2ps.title, GL2PS_MAJOR_VERSION, GL2PS_MINOR_VERSION,
                 GL2PS_PATCH_VERSION, GL2PS_EXTRA_VERSION, GL2PS_COPYRIGHT,
                 gl2ps.producer);
________________________________________________________
everything is ok :/, too long string or what?