Subj : Re: Threads and different SpiderMonkey Runtimes
To   : Mads Bondo Dydensborg
From : Mads Bondo Dydensborg
Date : Mon Sep 26 2005 02:36 pm

Mads Bondo Dydensborg skrev:
> Hi
> 
> I have a problem with using SpiderMonkey in my multithreaded C++ program.

It seems my problem might be related to the nspr library.

Iff I make sure that a threads has initialized the nspr library fully, 
before starting up all my other threads, I can run 3500 concurrent 
runtimes, each running their own contexts, objects and scripts without 
problems. (More than 3500 threads breaks my system because I only have 
32 bit of virtual addressing, but that will not be a problem in practice).

I have looked at the nspr code (pthread version, which is what I use), 
and it seems that the reason I did have problems, was because of races 
to the code in _PR_InitThreads. As long as I make sure that a single 
thread gets to call this code (possibly other pieces as well), before 
spawning all my other threads, things work out fine. Perhaps the 
lazy/implicit initialization of nspr (pthread version) needs to be 
wrapped in a call to pthread_once.

My workaround is to run a single thread using a dummy javascript. It 
would be nice to not have to do that, though.

Comments very welcome.

Regards,

Mads

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