Re: updated dma to user space API
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From: Andreas B. <and...@mu...> - 2000-04-25 19:56:02
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On Tue, Apr 25, 2000 at 10:12:24AM -0700, Jun Sun wrote: > > > > > NOTE 1: the driver is probably not safe for SMP > > machines (will do that > > later). It might also not be wise to share the > > device /dev/ohci1394 > > between several threads/processes. > > > > I am lost a little bit. How does this driver relate > to libraw? libraw doesn't yet have zero copy of iso packets. > As a separate question, can the libraw be shared by > multiple processes or multiple threads? One libraw1394 handle must not be shared by multiple processes or threads, apart from that it can be used in multithreaded programs. > If the answer is yes, I wonder if any behavior is > modified. For example, if both processes listen for > the same iso channel, will they both get the data? Yes. -- Andreas E. Bombe <and...@mu...> DSA key 0x04880A44 http://home.pages.de/~andreas.bombe/ http://linux1394.sourceforge.net/ |