This package provides functions to fork threads and wait for their
result, whether it’s an exception or a normal value.
Besides waiting for the termination of a single thread this packages
also provides functions to wait for a group of threads to terminate.
This package is similar to the threadmanager, async and spawn
packages. The advantages of this package are:
More efficient in both space and time.
No space-leak when forking a large number of threads.
Correct handling of asynchronous exceptions.
GHC specific functionality like forkOnIO and forkIOUnmasked.