Maybe this example from asio helps you further: http://www.boost.org/doc/libs/1_37_0/doc/html/boost_asio/example/nonblocking... regards Jens Weller -------- Original-Nachricht --------

Datum: Tue, 10 Feb 2009 16:34:53 +0300 Von: Oleg Malashenko An: boost-users@lists.boost.org Betreff: [Boost-users] [asio] Poll without read

Hi everyone,

I am trying to get video stream from Video4Linux2 device (/dev/video*) and faced with a interesting boost::asio usecase.

V4L2 device implements poll calls, so one can poll() on specific device file to wait for next portion of data, but read itself is made via ioctl.

I suppose, boost::asio is a natural choice in this situation and I am wondering if there is a method to run my callback when "the data is ready to read", but without calling read()? (on the same manner as ACE::Reactor does)?

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