Support for other Thread structures

[postmodern]

Would be useful if Queue, SizedQueue were also supported.

[mattn]

Mutex is already done. Right?

[postmodern]

Ah my mistake, Mutex is indeed there. Queue would definitely be useful for thread pools.

[mattn]

As same as reason I commented in another issue, mruby-thread is not green thread. So Queue may not be easy to implement.

[postmodern]

@mattn would implementing MRI 1.9 style pthread-based Thread / Mutex require adding a GIL to mruby?

[mattn]

mruby-thread is marshaling values between main thread's mrb_state and another thread's mrb_state.

https://github.com/mattn/mruby-thread/blob/master/src/mrb_thread.c#L65

So the proc which is generated in main thread doesn't work at another thread.

[mattn]

Is this closable? #7

[postmodern]

I think it's possible to implement Queue using pthread_mutex_lock and pthread_mutex_unlock.

[mattn]

As I said, mruby-thread is not green thread, So context is not shared. Even though you create Queue out side of thread, you can't manipulate it,