NPth is a new GNU portable threads library.It's a library to provide
the GNU Pth API and thus a non-preemptive threads implementation.
In contrast to GNU Pth is is based on the system's standard threads
implementation. This allows the use of libraries which are not compatible
to GNU Pth. Experience with a Windows Pth emulation showed that this is
a solid way to provide a co-routine based framework.
