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Document target_has_atomic #1171

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Oct 4, 2022
Merged

Document target_has_atomic #1171

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5316050
Document target_has_atomic
Mark-Simulacrum Feb 16, 2022
1ae3acc
Use relative link for core::sync::atomic
ehuss Apr 21, 2022
2325d95
Remove unstable API mention
Mark-Simulacrum Oct 3, 2022
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19 changes: 19 additions & 0 deletions src/conditional-compilation.md
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Expand Up @@ -191,6 +191,25 @@ Example values:
* `"pc"`
* `"unknown"`

### `target_has_atomic`

Key-value option set for each bit width that the target supports
atomic loads, stores, and compare-and-swap operations.

When this cfg is present, all of the stable [`core::sync::atomic`] APIs are available for
the relevant atomic width.

[`core::sync::atomic`]: ../core/sync/atomic/index.html

Possible values:

* `"8"`
* `"16"`
* `"32"`
* `"64"`
* `"128"`
* `"ptr"`

### `test`

Enabled when compiling the test harness. Done with `rustc` by using the
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