Safearray of UDT

[Joaquin M Lopez Munoz]

It'd be most helpful if you could post the actual implementation of your get_Notes function. Anything else seems to be OK. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

[Krouer]

The source code of my function: (my comment are in french, don't take care of them) STDMETHODIMP CScoreDesc::get_Notes(SAFEARRAY **pVal) { // Remplis une structure d'information pour pouvoir créer le tableau IRecordInfo* pRecordInfo = NULL; HRESULT hr = GetRecordInfoFromGuids(LIBID_MUSICSEARCHSYSTEM, 1, 0, GetUserDefaultLCID(), IID_NodeDesc, &pRecordInfo); // Détruit le tableau si il existait déjà if (*pVal != NULL) { SafeArrayDestroy(*pVal); *pVal = NULL; } // Crée un tableau pour le transport *pVal = SafeArrayCreateVectorEx(VT_RECORD, 0, m_NumberOfNote, pRecordInfo); pRecordInfo->Release(); if (*pVal == NULL) { hr = Error(_T("Cannot create the Notes decription array")); return hr; } // Rempli le tableau avec le contenu du tableau interne NoteDesc* pNoteArray; hr = SafeArrayAccessData(*pVal, (void**) &pNoteArray); if FAILED(hr) return hr; memcpy(pNoteArray, m_Notes, sizeof(NoteDesc)*m_NumberOfNote); SafeArrayUnaccessData(*pVal); return S_OK; } The IID_NoteDesc is defined at the top of this cpp file. I have try to follow an article I found on this site write by Ioannis Stamatopoulos. Thanks, Bruno

[Joaquin M Lopez Munoz]

The only thing I can guess about your code is that maybe sizeof(NoteDesc) is not equal to the value provided by pRecordInfo->GetSize() due to alignment considerations. Could you check that out? Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

[Krouer]

The error message: HEAP[musicserver.exe]: Invalid Address specified to RtlFreeHeap( 130000, 1e0690 ) The size return pRecordInfo->GetSize and sizeof(NoteDesc) are identical (value is 12 - 3 32bits floats) I don't know where it found to have to destroy this huge part of memory. My test array contains only 10 elements, that's 120 bytes. Not 722576 if I have understand correctly the trace from the HEAP. Thanks, Bruno

[Joaquin M Lopez Munoz]

Well, this is wild guessing, but anyway... What client technology are you using? If it's ASP or other VB-based stuff, seems like VBSCRIPT does not handle SAFEARRAYs of objects other than VARIANTs (read MSDN article PRB: Script Error Occurs When Referencing Non-variant Array (Q165967)). Also, if your client is written in C#, I've read several posts on the Usenet about an alleged bug of the .NET platform that shows when dealing with SAFEARRAYs created via SafeArrayCreateVector(Ex) --this is far from confirmed, though. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

[Krouer]

Client are currently in C++ (Console test app and ActiveX) I will give a try with SafeArrayCreateEx instead of SafeArrayCreateVectorEx. Perhaps, they have a bug with that last function. Many thanks Joaquin for your help, Thanks, Bruno

[Joaquin M Lopez Munoz]

Sorry I haven't been more helpful. Bonne chance! Joaquín M López Muñoz Telefónica, Investigación y Desarrollo

[Krouer]

Joaquín M López Muñoz wrote: Sorry I haven't been more helpful. Bonne chance! Don't be sorry. You have find the solution. I replace the SafeArrayCreateVectorEx by a SafeArrayCreateEx and it works perfectly. Gracias y buenas tardes, Bruno

[Ernest Laurentin]

Try to declare the get property like this:

[propget, id(2)] HRESULT Notes([in,out] SAFEARRAY(NoteDesc) *pVal);

Define your UDT like this: Describing UDT in the IDL file

library ScoreDesc
{
// replace "C1D3A8C0-A4AA-11D0-819C-00A0C90FFFC3" by the correct one in your project
typedef [uuid(C1D3A8C0-A4AA-11D0-819C-00A0C90FFFC3)] struct_NoteDesc{
float base;
float pitch;
float medium
} NoteDesc;

or Take a look Passing UDT at MSDN - God bless the World

[Joaquin M Lopez Munoz]

:-D!! Joaquín M López Muñoz Telefónica, Investigación y Desarrollo