[M3devel] foreign threads

[j k]

I was just mentioning here the need to create
threads with the Modula-3 libraries vs. "native"
thread creation.

I happened upon this related note:

http://www.mono-project.com/Compacting_GC

To perform the garbage collection, it is important that all the running 
threads are stopped,.....

The Mono runtime will automatically register all threads that are created 
from the managed world with the garbage collector. But it is important that 
any threads that will communicate with the Mono runtime to register these 
threads with the garbage collector, so they can be stopped during a 
collection, developers embedding the Mono runtime must call the 
mono_gc_register_thread.

I still think at least on Windows it tends to be easier -- you can rely on 
m3core.dll's DllMain(thread attach) notification to at least know about 
threads created after m3core.dll is loaded. That still leaves knowing about 
threads created before it was loaded. That's easy to handle inefficiently, 
hard to do efficiently.

- Jay

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