Eliza Weisman 2572f68339

core: support no-std + alloc (#256) ...

* core: support `no-std` + `alloc`

Motivation

Users have expressed interest in using `tracing` on no_std platforms
with `liballoc`.

Solution

This branch adds `no_std` support to `tracing-core` by adding a `std`
feature flag (on by default) which can be disabled to use `libcore` +
`liballoc` instead of `libstd`.

When the `std` feature is disabled, `tracing-core` will use
`spin::Mutex` rather than `std::sync::Mutex`, and the thread-local
scoped dispatcher will be disabled (since it necessitates a defined OS
threading model, which may not exist on `no_std` platforms).

Refs: #213

Signed-off-by: Eliza Weisman <eliza@buoyant.io>

2019-08-09 13:27:35 -07:00

..

macros.rs

core: support no-std + alloc (#256)

2019-08-09 13:27:35 -07:00