global static pointer variable in DLL

[Zarathustra]

torhu Wrote:

> Zarathustra wrote:
> > torhu Wrote:
> > 
> >> Zarathustra wrote:
> >> > I have a C DLL whih global static pointer variables.
> >> > When I use this DLL with C everything is ok, but when I try to use it (DLL) with D I receive Acces Violation errors.
> >> > I do not have any idea what is wrong. If something is inexplicable, You will ask. Please help.
> >> > 
> >> > simple example code in dll
> >> > gl2ps is global pointer
> >> > [code]
> >> > if(gl2ps){/* 
> >> > never true in C but true in D*/}
> >> > [/code]
> >> > 
> 
> > gl2ps is not exported because it is not necessary beyond DLL.
> > gl2ps declaration in DLL is following:
> > static GL2PScontext *gl2ps = NULL;
> > for example:
> > The crash occurs in exported gl2psBeginPage function. (in attachment)
> > Declaration of above function in D is following:
> > extern (C) GLint gl2psBeginPage;	// static linking
> > 
> > DLL is little long but very simple, so I can send it to you.
> 
> When you say 'crash', do you mean that gl2ps is NULL on line 11 of the 
> attached file?    Then the problem is likely be in the code that 
> initializes gl2ps, not in the gl2psBeginPage function.

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;