20 Dec
2011
20 Dec
'11
8:13 a.m.
Hi,
You might also want to have a look at how Supercollider does it:
http://www.supercolliderbook.net/
Look below for the chapter by Ross Bencina.
Cheers,
Andrés
On Tue, Dec 20, 2011 at 3:49 AM, Paul Davis <paul(a)linuxaudiosystems.com> wrote:
On Mon, Dec 19, 2011 at 8:10 PM, Iain Duncan
<iainduncanlists(a)gmail.com> wrote:
However, I would like to add the ability for the
user to send a message and
have it get executed later, where later gets figured out by the engine ( ie
on the top of the next 8 bar phrase ). To do this, I need some way of
storing deferred events and having the engine check on each step whether
there were any deferred events stored for 'now'. I can think of a few ways
to do this, and all of them raise red flags for a real time thread.
1) don't allow out-of-order queuing
2) just use a FIFO (i.e. ye olde single-reader/single-writer lock free
ringbuffer) to enqueue events between the engine and another thread
(presumably a GUI)
things get more complex if you insist on allowing out-of-order queuing
and/or more than one thread is delivering events. but not a lot more.
you can so multi-writer/single-reader FIFO in an RT safe way by
requiring a lock to write, but none to read, which serializes writes
and reduces it to an effectively single-writer/single reader
situation.
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