Hey there, 

I am trying to create an asynchronous thread-safe callback following the 
guidelines 
here 
http://julia.readthedocs.org/en/latest/manual/calling-c-and-fortran-code/#thread-safety

Trying to do one thing after another I tried to manually call my callback 
via the thread safe and asynchronous matter described in the documentation.

My basic test case looks like this:

success = false
function cb(status, data)
  println(status)
  println(data)
  success = true
  return nothing
end


cb_packaged = Base.SingleAsyncWork(cb)

ccall(:uv_async_send, Void, (Ptr{Void},), cb_packaged.handle)


yield()

Since all this happens in one thread I would assume that this should work 
without a problem. But nothing happens, no error, no SIGSEV.

Any idea where I might be going wrong?

Best,
Valentin

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