Re: AOO plugin for PD on SGI Irix

>> As I said, you just need to replace the shared_mutex with a shared_spinlock.

Yes, that was the best solution all along! 

In sink.hpp
#if defined(__sgi) && defined(__mips__)
using sink_update_lock = sync::shared_spinlock;
#else
using sink_update_lock = sync::shared_mutex;
#endif
And further down:
private:
    using shared_lock = sync::shared_lock<sink_update_lock>; // sink_update_lock, not shared_mutex
    using unique_lock = sync::unique_lock<sink_update_lock>;
    using scoped_lock = sync::scoped_lock<sink_update_lock>;
    using scoped_shared_lock = sync::scoped_shared_lock<sink_update_lock>;

In source.hpp
#if defined(__sgi) && defined(__mips__)
using source_update_lock = sync::shared_spinlock;
#else
using source_update_lock = sync::shared_mutex;
#endif
and further down:
 private:
    using shared_lock = sync::shared_lock<source_update_lock>;  // source_update_lock, not shared_mutex
    using unique_lock = sync::unique_lock<source_update_lock>;
    using scoped_lock = sync::scoped_lock<source_update_lock>;
    using scoped_shared_lock = sync::scoped_shared_lock<source_update_lock>;
    using scoped_spinlock = sync::scoped_lock<sync::spinlock>;

Or maybe just once in sync.hpp... 

No changes in source.cpp or sink.cpp needed (even the try_to_lock works fine as is). 

All works now, I love clean solutions! 

Thank you!
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