Hi boosters, I've implemented asynchronous file IO for linux in asio using aio_* functions. I created a class called basic_stream_file (and a typedef called stream_file) with almost the same interface as basic_stream_socket. But with read/write and async_read/async_write functions and an aio_demuxer_service. I writed it for the 0.3.2 version. For now to be able to use this new demuxer, is needed to create a demuxer of type: asio::basic_demuxer<asio::detail::aio_demuxer_service>. The implementation is attached. I didnt had time to test it very much, but it seems to be working okay. There are some problems that are related to aio_* in linux, since it isnt completely implemented in today's kernels and isnt implemented at all in 2.4.* kernels(there are patches however). And the aio_* functions only work really asynchronous for now if used with O_DIRECT and aligned buffers. But at least it could have a single interface for AIO with files in Windows and Linux. I'm planning to write asynchronous file I/O for windows with io completions ports too. IMO it would be interesting to be able to have a single demuxer in windows for file and socket AIO. I'm sending attached a file that uses these classes as an example. It must be linked with -laio and -lpthread and libaio must be installed. (It wasnt in my slackware 10.1, dont know about the default setup of other distributions). Any feedback will be appreciated. Thanks, Felipe. -- Felipe Magno de Almeida Developer from synergy and Computer Science student from State University of Campinas(UNICAMP). Unicamp: http://www.ic.unicamp.br Synergy: http://www.synergy.com.br "There is no dark side of the moon really. Matter of fact it's all dark."