WIP: Support C11 atomics required by dav1d#814

Draft

thedataking wants to merge 3 commits intomasterfrom perl/c11_atomics

+298-41

Commits on Feb 6, 2023

C11 atomics: Add tag, move information over to Rust side

chrysn
authored and
thedataking
committed
c2rust-exporter: Remove Atomics warning

chrysn
authored and
thedataking
committed

Commits on Mar 3, 2023

WIP: Handle some C11 atomic types and operations
thedataking
committed