void Wopi::inner_readData( SharedMem* shmem, Item& data )
{
StringStream target;
shmem->read( &target, true );
if ( target.tell() == 0 )
{
// nothing to be deserialized.
data.setNil();
return;
}
target.seekBegin(0);
Item::e_sercode sc = data.deserialize( &target, VMachine::getCurrent() );
if( sc != Item::sc_ok )
{
throw new WopiError( ErrorParam( FALCON_ERROR_WOPI_APPDATA_DESER, __LINE__ )
.desc( "Error during de-serialization of application data")
.extra( String("type ").N( (int) sc ) )
);
}
}
bool Wopi::setData( Item& data, const String& appName, bool atomicUpdate )
{
SharedMem* pAppMem = 0;
// do we have the required appname data?
m_mtx.lock();
AppDataMap::const_iterator pos = m_admap.find( appName );
if( pos == m_admap.end() )
{
m_mtx.unlock();
pAppMem = inner_create_appData( appName );
}
else
{
pAppMem = pos->second;
m_mtx.unlock();
}
// we can deal with the shared memory in an unlocked region, of course.
if ( pAppMem->currentVersion() != pAppMem->lastVersion() )
{
// we already know we're out of sync.
if( atomicUpdate )
inner_readData( pAppMem, data );
return false;
}
// ok, try and serialize the data.
StringStream source;
Item::e_sercode sc = data.serialize( &source, false );
if( sc != Item::sc_ok )
{
throw new WopiError( ErrorParam( FALCON_ERROR_WOPI_APPDATA_SER, __LINE__ )
.desc( "Error during Serialization of application data")
.extra( String("type ").N( (int) sc ) )
);
}
// great, the data is serialized; try to get it out of the door.
int32 datalen = (int32) source.tell();
source.seekBegin(0);
bool bSuccess = pAppMem->commit( &source, datalen, atomicUpdate );
// did we succeed?
if( ! bSuccess )
{
// No; we wasted the serialization. However, are now required to
// deserialize the item?
if( atomicUpdate )
{
// ... and, is there anything to be de-serialized?
if( source.tell() != 0 )
{
source.seekBegin(0);
Item::e_sercode sc = data.deserialize( &source, VMachine::getCurrent() );
if( sc != Item::sc_ok )
{
throw new WopiError( ErrorParam( FALCON_ERROR_WOPI_APPDATA_DESER, __LINE__ )
.desc( "Error during de-serialization of application data")
.extra( String("type ").N( (int) sc ) )
);
}
}
else
{
data.setNil();
}
}
}
return bSuccess;
}