Problem with C++ class in plugin

I have no errors when compiling:

...

TiXmlDocument doc;



extern "C" void __declspec(dllexport) LoadFile(HWND hwndParent, int string_size, 

                                      char *variables, stack_t **stacktop)

{

...

	if (!doc.LoadFile(szBuf))

...

}

But it crash when calling "doc.LoadFile(szBuf)".
If I write like this:

...

extern "C" void __declspec(dllexport) LoadFile(HWND hwndParent, int string_size, 

                                      char *variables, stack_t **stacktop)

{

...

	TiXmlDocument doc;

	if (!doc.LoadFile(szBuf))

...

}

all working fine, but "TiXmlDocument doc" need to be global for other functions.

When I write console application no errors were occupied:

...

TiXmlDocument doc;



void loadit();

void parseit();

void saveit();



void main()

{

	loadit();

	parseit();

	saveit();

}



void loadit()

{

...

	if ( !doc.LoadFile(szBuf) )

...

}

Any suggestions?

Use /NOUNLOAD or give the user a handle. The global is destroyed when the DLL is unloaded.

I use /NOUNLOAD, but it is unimportant, because it is crash after first call "xml::LoadFile":

Section

	xml::LoadFile /NOUNLOAD "demotest.xml" .r0

	xml::Parse /NOUNLOAD .r0

	xml::SaveFile .r0

SectionEnd

Then something else is probably happening inside xml::LoadFile. Not much can be said without more information.

Minimal variant of the strange error:

#include <windows.h>

#include "tinyxml.h"



typedef struct _stack_t {

	struct _stack_t *next;

	char text[1024];

} stack_t;



stack_t **g_stacktop;





TiXmlDocument doc;



extern "C" void __declspec(dllexport) Load(HWND hwndParent, int string_size, 

                                      char *variables, stack_t **stacktop)

{

	doc.LoadFile("demotest.xml");

}



BOOL WINAPI DllMain(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)

{

	return TRUE;

}

Without error:

#include <windows.h>

#include "tinyxml.h"



typedef struct _stack_t {

	struct _stack_t *next;

	char text[1024];

} stack_t;



stack_t **g_stacktop;





extern "C" void __declspec(dllexport) Load(HWND hwndParent, int string_size, 

                                      char *variables, stack_t **stacktop)

{

	TiXmlDocument doc;

	doc.LoadFile("demotest.xml");

}



BOOL WINAPI DllMain(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)

{

	return TRUE;

}

You need to manually initialize doc. Without libc, constructors for global variables aren't called.

I got it, thanks!

I had a little played with compiler options and here that have found out. I have erased entry point (/entry:"DllMain"->"") and no errors were occupied!