Reading is not safe. 

Not if somebody writes bytes 0 and 1 of a float, the OS pauses the writer thread, the reader thread reads all 4 bytes, and the writer resumes and writes bytes 2 and 3.

It would be rare -- but it WILL happen. CLICK.

Regards,
Mike

-----Original Message-----
>From: jpff 
>Sent: Sep 8, 2008 12:01 PM
>To: csound-devel@lists.sourceforge.net
>Subject: [Cs-dev] Spinlocks
>
>Are the spin locks really necessary in the
>in/ins/inq/inh/inq/... opcodes? Surely reading is safe
>==John ffitch
>
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If someone writes to the input while opcodes are reading it then there
is something very wrong with the semantics!  In Csound if reading of
input is not thread-safe then the system is bust.  You need it for
channels and zak of course but not in
==John ffitch

Apologies for delay -- my firewall disk collapsed at 4:30am and I have
spent the day rebuilding on a machine without CD or floppy.....

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