[omniORB] Fw: (by [e-mail])use sequence<struct> problem ?

[roger]

HI!

I am download omniORB-4.0.7-win32-vc7.zip,
I am using omniORB_4.0.7 on Win2000 (MSVC++7.1) platforms,
and the echo examples work fine .
Now I use data sequence,but have the problem :

//----------IDL---------
struct NetDataItem
{
long id;
string name;
};
typedef sequence<NetDataItem> DataArray;
typedef sequence<long> DataLongArray;
interface QDataSeq
{
DataArray QueryDatas();
DataLongArray QueryLongData();
};

//---------server code--------------
// return struct data Sequence
DataArray* QDataSeq_i::QueryDatas(){
int cnt =100;
DataArray_var datas = new DataArray((CORBA::Long)cnt);
datas->length(cnt);
for (int i =0;i< cnt; ++i)
{
datas[i].id = (CORBA::Long)(i+1);
datas[i].name = CORBA::string_dup("aaaa"); // is OK??
}
std::cout << "OK" << endl;
return datas._retn();
}
// return long Sequence
DataArray* QDataSeq_i::QueryLongData(){
int cnt =100;
DataLongArray_var datas = new DataLongArray((CORBA::Long)cnt);
datas->length(cnt);
for (int i =0;i< cnt; ++i)
{
datas[i] = (CORBA::Long)(i+1);
}
std::cout << "OK" << endl;
return datas._retn();
}

//-----------client code-----------------------
this arises some exception of free sequence. why?
//query struct data Sequence , use _var
void queryData(QDataSeq_ptr e)
{
DataArray_var dest = e->QuearyDatas();
int len = pdest->length();
std::cerr << "query sequence size £º" << len << endl;
//do something
}
/* use delete sequence ptr
void queryData(QDataSeq_ptr e)
{
DataArray* pdest = e->QuearyDatas();
int len = pdest->length();
std::cerr << "query sequence size £º" << len << endl;
//pdest->release();
delete pdest; // arise some exception.
//If this isn't used 'delete' , it have memory leak,but run OK.
}
*/

//query long Sequence. It is work fine and not have memory leak.
void queryData(QDataSeq_ptr e)
{
DataArray_var dest = e->QuearyDatas();
int len = pdest->length();
std::cerr << "query sequence size £º" << len << endl;
//do something
}
====================================
Get a list of NetDataItem and display it, ERROR IN THE CLIENT.
but Get a list of long ,it work fine.
why?
Help me!
How to fine use sequence of struct in the client and server?

2006-10-16 roger007



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[Clarke Brunt]

...
...

After looking briefly, I can't see anything wrong with the code.

Is there any possibility that you are mixing up debug/release builds of
your own code and omniORB. Or other different versions of the run time
library. With VC6, you had to choose Debug (or Release) Multi-threaded
DLL is the version in order to match the one that omniORB was linked
with.

If the run time library doesn't match, then you can get problems where
omniORB has allocated memory using one version of the heap, and your
code tries to delete the memory using a different version.

This doesn't fully explain why it might work with longs but not with
structures though.