id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
1232,mapped_file_source::is_open() is broken under windows,royalstream@…,Jonathan Turkanis,"Under windows, '''mapped_file_impl::handle_''' gets set to '''INVALID_HANDLE_VALUE''' when the file gets closed or on error.
But '''mapped_file_source::is_open()''' incorrectly assumes that if the handle is invalid it will have a value of zero and it doesn't consider '''INVALID_HANDLE_VALUE''' a possibility.
Obviously, adding '''INVALID_HANDLE_VALUE''' to '''mapped_file_source::is_open()''' would be poor design. A better way would be to explose a '''mapped_file_impl::is_valid()''' method that works as it should depending on the platform and have '''mapped_file_source::is_open()''' call it.

Regards,

Steven Burns",Bugs,closed,To Be Determined,iostreams,Boost 1.34.1,Problem,fixed,,