OpenEuphoria

2. Re: Andrea Cini's euwingui

• Posted by mattlewis (admin) Oct 27, 2009
• 4526 views

Whoa. That's the first time I've ever seen that. Seriously, on the define_c call? Can you run under the watcom [windowed] debugger using a debug build of euphoria? I'll try to get around to doing this, but it may be a while before I get a chance.

Matt

4. Re: Andrea Cini's euwingui

• Posted by mattlewis (admin) Oct 28, 2009
• 4529 views

Or, I suppose it would be possible to write a shim that converted any returned values from the dll into 4.0 objects. Obviously, it would slow things down, but at least it should allow old code like that to work.

4.0 objects passed to 3.1 code should be fine (I think). But you'd need to convert anything coming from 3.1 code to be a 4.0 object.

Matt

6. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Oct 28, 2009
• 4458 views

The biggest change was the addition of the cleanup_ptr at the end of every structure (s1 [for sequences], d [for atoms], etc) used internally by euphoria to represent non-integer types. The code checks to see if this is NULL or not, and if not it attempts to interpret the value as an euphoria routine and calls it (runs the code of the routine). So if a 3.1 object was passed, we'd try to read pass the end of the memory for the structure. And then execute it. (But this particular issue is easy to deal with, a shim just needs add NULL to the end of the structure.)

8. Re: Andrea Cini's euwingui

• Posted by mattlewis (admin) Oct 29, 2009
• 4412 views

D:\Euphoria\EuWinGui\EWG-Designer>eui c:\EUPHORIA\SOURCE\eu.ex Designer.exw 
 
C:\EUPHORIA\include\std\dll.e:535 in function call_back() 
DEP style callbacks not supported in eu.ex 
... called from d:\euphoria\euwingui\include\EuWinGUI.ew:269 
 
--> see ex.err 

Yes, when callbacks were made to work with DEP, for some reason the code to do so was written in the include file rather than the back end. I don't know why, but it should probably be considered a bug, and the code converted to C.

Due to the way that eu.ex handles callbacks, it doesn't work with windows callbacks any more. We need to get back to the state where the include file is a simple wrapper around the back end implementation.

Matt

10. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Nov 11, 2010
• 4199 views

It might not have been as easy as I thought. I wrote the following shim code, but EuWinGUI no longer crashes but doesn't seem to work either.

// libconvert.dll 
// tested with 4.0.0RC1's euphoria.h but this code is designed to work 
// with 3.1.1's euphoria.h as well 
#include <include/euphoria.h> 
 
#ifdef _WIN32 
#define DLLEXTERN extern __declspec(dllexport) 
#define DLLEXPORT __declspec(dllexport) 
// Use Heap functions for everything. 
void * ddefault_heap = NULL; 
#include <windows.h> 
#define hmalloc(n) HeapAlloc((void *)ddefault_heap, 0, n) 
#define hfree(p) HeapFree((void *)ddefault_heap, 0, p) 
#define hrealloc(p, n) HeapReAlloc((void *)ddefault_heap, 0, p, n) 
#else 
#define DLLEXTERN extern 
#define DLLEXPORT 
#define hmalloc(n) malloc(n) 
#define hfree(p) free(p) 
#define hrealloc(p, n) realloc(p, n) 
#endif 
 
DLLEXTERN void * atom_to_v3(void * param); 
DLLEXTERN void * atom_to_v4(void * param); 
DLLEXTERN void * sequence_to_v3(void * param); 
DLLEXTERN void * sequence_to_v4(void * param); 
DLLEXTERN void * object_to_v3(void * param); 
DLLEXTERN void * object_to_v4(void * param); 
 
struct s1v4 { 
	object_ptr base; 
	long length; 
	long ref; 
	long postfill; 
	void * cleanup; 
}; 
 
struct dv4 { 
	double dbl; 
	long ref; 
	void * cleanup; 
}; 
 
typedef struct dv4  *dv4_ptr; 
typedef struct s1v4 *s1v4_ptr; 
 
#define DBL_PTR4(ob) ( (dv4_ptr)  (((unsigned)(ob)) << 3) ) 
#define SEQ_PTR4(ob) ( (s1v4_ptr) (((unsigned)(ob)) << 3) )  
 
struct s1v3 { 
	object_ptr base; 
	long length; 
	long ref; 
	long postfill; 
}; 
 
struct dv3 { 
	double dbl; 
	long ref; 
}; 
 
typedef struct dv3  *dv3_ptr; 
typedef struct s1v3 *s1v3_ptr; 
 
#define DBL_PTR3(ob) ( (dv3_ptr)  (((unsigned)(ob)) << 3) ) 
#define SEQ_PTR3(ob) ( (s1v3_ptr) (((unsigned)(ob)) << 3) )  
 
void init() 
{ 
#ifdef _WIN32 
	if (ddefault_heap == NULL) 
		ddefault_heap = GetProcessHeap(); 
		//ddefault_heap = HeapCreate(0,0,0); 
#endif 
} 
 
DLLEXPORT void * atom_to_v3(void * param) 
{ 
	dv4_ptr d4; 
	dv3_ptr d3; 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (!(IS_ATOM(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	d4 = DBL_PTR4(atom); 
	d3 = (dv3_ptr)hmalloc(sizeof(struct dv3)); 
	d3->dbl = d4->dbl; 
	d3->ref = 2; // not safe to free, so keep forever 
	//d4->ref--; 
	return (void *)(MAKE_DBL(d3)); 
} 
 
DLLEXPORT void * atom_to_v4(void * param) 
{ 
	dv4_ptr d4; 
	dv3_ptr d3; 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (!(IS_ATOM(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	d3 = DBL_PTR3(atom); 
	d4 = (dv4_ptr)hmalloc(sizeof(struct dv4)); 
	d4->dbl = d3->dbl; 
	d4->ref = 2; // not safe to free, so keep forever 
	d4->cleanup = NULL; 
	//d3->ref--; 
	return (void *)(MAKE_DBL(d4)); 
} 
 
DLLEXPORT void * sequence_to_v3(void * param) 
{ 
	int i; 
	s1v4_ptr s4; 
	s1v3_ptr s3; 
	object atom = (object)param; 
	if (!(IS_SEQUENCE(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	s4 = SEQ_PTR4(atom); 
	s3 = (s1v3_ptr)hmalloc(sizeof(struct s1v3) + (s4->length + 1) * sizeof(object)); 
	s3->ref = 2; // not safe to free, so keep forever 
	s3->base = (object_ptr)(s3 + 1); 
	s3->base[s4->length] = NOVALUE; 
	for (i = 0; i < s4->length; i++) 
	{ 
		s3->base[i] = (object)object_to_v3((void*)(s4->base[i])); 
	} 
	s3->length = s4->length; 
	s3->postfill = s4->postfill; // is this right? 
	s3->base--; // point to "0th" element 
	//s4->ref--; 
	return (void *)(MAKE_SEQ(s3)); 
} 
 
DLLEXPORT void * sequence_to_v4(void * param) 
{ 
	int i; 
	s1v4_ptr s4; 
	s1v3_ptr s3; 
	object atom = (object)param; 
	if (!(IS_SEQUENCE(atom))) 
	{ 
		return NULL; 
	} 
	init(); 
	s3 = SEQ_PTR3(atom); 
	s4 = (s1v4_ptr)hmalloc(sizeof(struct s1v4) + (s3->length + 1) * sizeof(object)); 
	s4->ref = 2; // not safe to free, so keep forever 
	s4->base = (object_ptr)(s4 + 1); 
	s4->base[s3->length] = NOVALUE; 
	for (i = 0; i < s3->length; i++) 
	{ 
		s4->base[i] = (object)object_to_v4((void*)(s3->base[i])); 
	} 
	s4->length = s3->length; 
	s4->postfill = s3->postfill; // is this right? 
	s4->cleanup = NULL; 
	s4->base--; // point to "0th" element 
	//s3->ref--; 
	return (void *)(MAKE_SEQ(s4)); 
} 
 
DLLEXPORT void * object_to_v3(void * param) 
{ 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (IS_SEQUENCE(atom)) 
	{ 
		return sequence_to_v3(param); 
	} 
	return atom_to_v3(param); 
} 
 
DLLEXPORT void * object_to_v4(void * param) 
{ 
	object atom = (object)param; 
	if (IS_ATOM_INT(atom) || atom == NOVALUE) 
	{ 
		return param; 
	} 
	if (IS_SEQUENCE(atom)) 
	{ 
		return sequence_to_v4(param); 
	} 
	return atom_to_v4(param); 
} 

Here are the required changes to EuWinGUI.ew

AM = C_POINTER, 
SQ = C_POINTER 
--AM = E_ATOM, 
--SQ = E_SEQUENCE 
 
atom object_to_v3, object_to_v4, v3helper 
 
function v3_c_func(atom x, sequence p) 
	object ret, r, q 
	q = "" 
	for i = 1 to length(p) do 
		q &= 0 
		q[i] = c_func(object_to_v3, {p[i]}) 
	end for 
	ret = c_func(x, q) 
	r = c_func(object_to_v4, {ret}) 
	return r 
end function 
procedure v3_c_proc(atom x, sequence p) 
	object q 
	q = "" 
	for i = 1 to length(p) do 
		q &= 0 
		q[i] = c_func(object_to_v3, {p[i]}) 
	end for 
	c_proc(x, q) 
end procedure 
                   
procedure link() 
v3helper = indll("LIBCONVERT.DLL") 
object_to_v3 = infunc(v3helper,"object_to_v3",{E_OBJECT},C_POINTER) 
object_to_v4 = infunc(v3helper,"object_to_v4",{C_POINTER},E_OBJECT) 
EWG = indll("EuWinGUI.DLL") 

12. Re: Andrea Cini's euwingui

• Posted by ChrisB (moderator) Nov 12, 2010
• 4002 views

Hi

getting an error (any app / demo)

C:\EUPHORIA\INCLUDE\EuWinGUI.ew:283 
c_proc/c_func: bad routine number (88)  

line 283 is

function execpp(object rid) 
call_proc(rid,{}) 
return 0 
end function 
c_proc(setexpp,{call_back(routine_id("execpp"))})                      <<<<line 283 
 

Chris

14. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Nov 12, 2010
• 3955 views

C:\EUPHORIA\INCLUDE\EuWinGUI.ew:283 
c_proc/c_func: bad routine number (88)  

function execpp(object rid) 
call_proc(rid,{}) 
return 0 
end function 
c_proc(setexpp,{call_back(routine_id("execpp"))})                      <<<<line 283 
 

I see what happened. I forgot to mention that you have to manually edit EuWinGUI.ew and replace all c_proc/c_func calls with v3_c_proc/v3_c_func (which goes through the v311 shim compatibility layer).

16. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Nov 13, 2010
• 3897 views

There's a bug in the wrapper. The return values of v3_c_func() are passed in from a memory block allocated by 3.1.1 code, but after this is turned back into a 4.0 object, the block of RAM is never freed.

I can't compile a new dll.e right now, but here's the new euconvert.e and euconvertinc.e needed to fix this.

euconvertinc.e

include std/dll.e 
include std/machine.e 
include std/text.e 
include std/get.e 
 
constant thedll = open_dll("euconvert.dll"), 
v3_define_c_func_ = define_c_func(thedll, "v3_define_c_func", {C_POINTER}, C_INT), 
v3_define_c_proc_ = define_c_func(thedll, "v3_define_c_proc", {C_POINTER}, C_INT), 
v3_c_func_ = define_c_func(thedll, "v3_c_func", {C_INT, C_POINTER}, C_POINTER), 
v3_c_proc_ = define_c_proc(thedll, "v3_c_proc", {C_INT, C_POINTER}) 
v3_free_ = define_c_proc(thedll, "v3_free", {C_POINTER}) 
 
if find(-1, {thedll, v3_define_c_func_, v3_define_c_proc_, v3_c_func_, v3_c_proc_} ) then 
	puts(1, "thedll, v3_define_c_func_, v3_define_c_proc_, v3_c_func_, v3_c_proc_\n") 
	? {thedll, v3_define_c_func_, v3_define_c_proc_, v3_c_func_, v3_c_proc_} 
	puts(1, "error opening one of the above\n") 
	abort(1) 
end if 
 
public function v3_define_c_func(atom dll, sequence name, sequence args, atom ret) 
	sequence all = {dll, name, args, ret} 
	all = sprint(all) 
	atom addr = allocate_string(all) 
	integer r = c_func(v3_define_c_func_, {addr}) 
	free(addr) 
	return r 
end function 
 
public function v3_define_c_proc(atom dll, sequence name, sequence args) 
	sequence all = {dll, name, args} 
	all = sprint(all) 
	atom addr = allocate_string(all) 
	integer r = c_func(v3_define_c_proc_, {addr}) 
	free(addr) 
	return r 
end function 
 
public function v3_c_func(integer func, sequence args) 
	sequence all = sprint(args) 
	atom addr = allocate_string(all) 
	atom ret = c_func(v3_c_func_, {func, addr}) 
	free(addr) 
	all = peek_string(ret) 
	-- since this was allocated by a v3 runtime, we need to make sure 
	-- that it is freed by the same runtime that did the allocation 
	c_proc(v3_free_, {ret}) 
	all = value(all) 
	return all[2] 
end function 
 
public procedure v3_c_proc(integer func, sequence args) 
	sequence all = sprint(args) 
	atom addr = allocate_string(all) 
	c_proc(v3_c_proc_, {func, addr}) 
	free(addr) 
end procedure 

euconvert.e

include dll.e 
include get.e 
include misc.e 
include machine.e 
 
function peek_string(atom addr) 
        sequence s 
        integer c 
        s = "" 
        while 1 do 
                c = peek(addr) 
                if c = 0 then 
                        exit 
                end if 
                s &= c 
		addr = addr + 1 
        end while 
        return s 
end function 
 
function toobject(sequence s) 
        if atom(s) then 
                s = peek_string(s) 
        end if 
        s = value(s) 
        if atom(s[2]) then 
                s = "" 
        else 
                s = s[2] 
        end if 
        return s 
end function 
 
global function v3_define_c_proc(integer x) 
	sequence s 
        s = toobject(x) 
        return define_c_proc(s[1], s[2], s[3]) 
end function 
 
global function v3_define_c_func(integer x) 
	sequence s 
        s = toobject(x) 
        return define_c_func(s[1], s[2], s[3], s[4]) 
end function 
 
global function v3_c_func(integer i, integer x) 
	sequence s 
        s = toobject(x) 
        i = allocate_string(sprint(c_func(i, s))) 
	return i 
end function 
 
global procedure v3_c_proc(integer i, integer x) 
	sequence s 
        s = toobject(x) 
        c_proc(i, s) 
end procedure 
 
global procedure v3_free(integer x) 
	free(x) 
end procedure 

18. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Nov 14, 2010
• 3739 views

The version with the fix (including translated artifacts and a fully compiled .dll) is up at http://openeuphoria.org/euconvert.zip

20. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Nov 14, 2010
• 3717 views

Can you send me the dll you built?

22. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Aug 30, 2013
• 2508 views

I thought I had replied to this earlier, but it seems not.

Anyways, it's hard to say for sure, but my best guess is that you built the converter dll with 4.0 instead of 3.1.1. In order to work properly, the converter dll must be built with 3.1.1 - otherwise, you get the same issues with struct changes that you would with using 4.0 directly to pass the data in (since that's exactly what a 4.0-built converter dll would be doing).

I considered a C-shim layer (which would get rid of the dependency on 3.1.1) but it was just easier and faster to do stuff with Eu.

24. Re: Andrea Cini's euwingui

• Posted by jimcbrown (admin) Aug 30, 2013
• 2455 views

No problem. Glad to have been of service. My apologies for taking so long to post a reply.