On Sat, 2008-10-18 at 20:44 +0200, Fons Adriaensen wrote: > It doesn't matter how many times it is read, but it > does matter if it is ever written with a wrong value. > And this *did* happen in the old version at the end of > a read: > > rb->read_ptr += n1; > rb->read_ptr &= rb->size_mask; > If a context switch occurs after the first statement, > and read_ptr > size (which can happen), then the writer > would believe there is more space to write than there > actually is. if read_ptr > size then the math should result in the write space being *under* estimated. if thats not happening then my worst nightmares come true, which has happened before. is there a signed/unsigned issue going on here? _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
