[PD] New user - technical questions

[Mathieu Bouchard]

On Wed, 1 Dec 2010, Hans-Christoph Steiner wrote:

> Parallelization is built into Pd, just put down objects, and they will 
> run in parallel.

There's one thread for all those objects together !

There are a few exceptions to that, which have to be explicitly 
implemented. For instance, [pix_video] uses threads, whereas GridFlow's 
equivalents don't.

The <m_pd.h> API is not thread-safe, therefore you have to use a global 
mutex around anything you do with <m_pd.h>... even gensym().

> Granted, Pd doesn't use threads to implement the parallelization because 
> it aims to be completely deterministic (basically, that means a patch 
> run exactly the same everytime).  Its difficult to write a deterministic 
> program using standard threads.

No-one uses the word «parallel» to mean *that*.

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| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC