[boost] [interprocess] difference between resize & reserve

Hi, Ion! It seems I found the difference between "resize" and "reserve" After changing resize to reserve in following code m_objSendVectorStream.tellp() will return -1 instead of size of data packet :-( m_objSendVectorStream.resize( QueueSettings::maxMessageSize() ); m_objSendVectorStream.seekp( 0 ); { boost::archive::defOArchive objOArchive( m_objSendVectorStream ); objOArchive << objData; }