Tracking issue for complete 32-bit support

[navaati]

There is a number of small issues making usage of the lib on 32-bit systems (such as embedded chips) impossible or limited. I’ll collate them in this issue with the relevant PRs when I or someone else tackle them, in order to avoid opening many issues but still remember the list.

• [x] 32 bit support on mips and powerpc platforms: was already done by @chitoku-k in #42, thanks !
• [x] 32 bit support on all platform #201 #203
• [x] u32 support for Counter: has been done by @brocaar in #173, thanks !
• [x] f32 support for Counter: #216
• [x] u32 support for Gauge: was already done by @koushiro in #191, thanks !
• [x] f32 support for Gauge: #216
• [x] i32 support for Gauge: has been done by @brocaar in #173, thanks !
• [ ] Histograms support for something smaller than f64: this one is not a blocker as Histograms use a RWLock rather than Atomics so it works (non-atomic f64 support is always present in Rust via emulation), but it may be slower or consume more memory than wished for

[navaati]

@mxinden One thing I’m not sure about is Examplars: I know @brocaar added support for the encoding of them in #173 but I don’t don’t think there is tests for them in 32-bit sizes or if they require Atomics, as I don’t really know how to use them. So their support status on 32-bit machines is unknown to me.