[gmpi] Re: Topic 5: Threading
- From: "Angus F. Hewlett" <amulet@xxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Thu, 10 Apr 2003 19:29:41 -0400 (EDT)
On Thu, 10 Apr 2003, Mike Berry wrote:
> I have a high-priority audio processing thread calling the plugin's
> process method. I have a UI thread which wants to ask the plugin what
> the value of a parameter currently is. Here are my choices on Windows:
> 1.) Critical section the plugin entry. Bad things happen when UI thread
> blocks the process thread. So ditch this possibility.
> 2.) Keep a complete copy of the plugin's parameters in the host which
> can be read in a synchronized manner. Now I have the data stored in two
> places, and have to keep those in sync, based on less information than
> the plugin has. Possible, but certainly less efficient.
3.(?) Have your graphics thread post a notification to the process thread
to pull the parameter immediately after the next process. The graphics
thread then waits for the result (but that doesn't matter, it's only going
to wait til the end of the next buffer cycle).
Regards,
Angus.
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