Hello everyone, I noticed there are several FIXMEs in MappedByteBufferAdapter.java, which are related to synchronization issue.
Following FIXME is for getChar() method: // FIXME Need synchronization as far as the update of this.position is concerned of the following methods? Spec does not say whether MappedByteBuffer is thread safe. It is the decision we should make. I read through MappedByteBuffer javadoc, and didn't find any description about concurrent & synchronization. The spec on MappedByteBuffer emphasizes "All or part of a mapped byte buffer may become inaccessible at any time", and in the end, it mentions "Mapped byte buffers otherwise behave no differently than ordinary direct byte buffers." Spec doesn't mention any synchronization issues on direct byte buffers either. Therefore, in my opnion, only synchronizing for MappedByteBuffer is unnecessary. Any comments? or may I miss something? Thanks! Best regards, -- Andrew Zhang China Software Development Lab, IBM
