According to [5] it is already thread safe.[5] http://forum.dlang.org/post/sxuiargigylszcurp...@forum.dlang.org
The docs seem to state the contrary, though:
* This struct is not thread-safe in general, it just handles the * concurrent parts of the GC.
https://github.com/phobos-x/phobosx/blob/master/source/phobosx/signal.d Bastiaan.
