Hi all,
I have a C function which is a call-back of a .dll, I need to call a .prg
level function to pass to it the handling of that call-back action.
int my_c_func( void * buff )
{
...
}
my_c_func() gets called from the .dll and receives an allocated buffer, I want
to pass it to a .prg level function which will fill it with some data and then
I give control back to the .dll.
Now I'm doing something like this, which does not work :)
int read( void *ptr, int size, void * user_data )
{
PHB_ITEM pObject = (PHB_ITEM) user_data;
PHB_ITEM pItemBuffer = NULL;
char * pBuffer = NULL;
PHB_DYNS pSym_Read = hb_dynsymFindName( "READ" );
int res = 0;
if ( pSym_Read && pObject ) {
pItemBuffer = hb_itemNew( NULL );
pBuffer = malloc( size );
hb_itemPutCPtr( pItemBuffer, pBuffer, size );
hb_vmPushSymbol( hb_dynsymSymbol( pSym_Read ) );
hb_vmPush( pObject );
hb_vmPushItemRef( pItemBuffer );
hb_vmPushLong( size );
hb_vmSend( 2 );
res = hb_parnl( -1 );
memcpy( ptr, pBuffer, res );
hb_itemRelease( pItemBuffer );
}
return res;
}
I'd like not to have to copy that buffer from C to PHB_ITEM and then back to C
and, most of all, to make it work!
So, question is: what is the correct way to pass a C buffer to a PRG function
by reference so that the PRG function (in my case its a method, but I think
this does not make such a difference) can change it and then remove this
buffer from the HB_ITEM so that the C code can keep using it?
Thanks!
Maurilio.
--
__________
| | | |__| Maurilio Longo
|_|_|_|____| farmaconsult s.r.l.
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