liblfds: add new package
This is liblfds, a portable, license-free, lock-free data structure
library written in C.
Lock-free data structures are process, thread and interrupt safe
(i.e. the same data structure instance can be safely used concurrently
and simultaneously across cores, processes, threads and both inside
and outside of interrupt handlers), never sleep (and so are safe
for kernel use when sleeping is not permitted), operate without
context switches, cannot fail (no need to handle error cases, as
there are none), perform and scale literally orders of magnitude
better than locking data structures, and liblfds itself (as of
release 7.0.0) is implemented such that it performs no allocations
(and so works with NUMA, stack, heap and shared memory) and compiles
not just on a freestanding C89 implementation, but on a bare C89
implementation.
The library is completely documented (every API, function, macro,
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