ref: 15b2a406cc0e11377cee12b5a112c003f7250a7f
dir: /module/lock.m/
Lock: module
{
PATH: con "/dis/lib/lock.dis";
Semaphore: adt {
c: chan of int;
obtain: fn(nil: self ref Semaphore);
release: fn(nil: self ref Semaphore);
new: fn(): ref Semaphore;
};
init: fn();
};