Horiguchi-san Thank you for your comment.
> A connection cannot be concurrently used by multiple threads so > the programmer must guard connections using mutex [1] or > friends. If it is done by a single mutex (I suppose it is > common.), there's no race condition also on the prepared > statement storage. I'm not sure it is explicitly aimed but I > suppose that there's no problem in a common usage of the library. I understand it, but current scope of StatementCache and DeclareStatementList seems not to be limitted within each connection, isn't it? Therefore, I thought the operation on them must be thread safe. For example, scope of DescriptorList in descriptor.c is within thread (not connection) by using pthread_getspecific/ pthread_setspecific(). Regards Ryo Matsumura
