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| author |  Daniel Carosone <Daniel.Carosone@gmail.com>
| 2020-10-02 19:56:17 +1000 |
|---|---|---|
| committer | Daniel Carosone <Daniel.Carosone@gmail.com>
| 2020-10-02 19:56:17 +1000 |
| commit | 91c2d4850e31da1bbd49fc668ae79533e7ac3ab4 (patch) | |
| tree | 1b2a9d3fb6f660813b667a64352558442edb3a26 | |
| parent | baa2edfe72ec2e33a84dfebc6c4baf2c2b8d55c2 (diff) | |
| download | rtic-91c2d4850e31da1bbd49fc668ae79533e7ac3ab4.tar.gz rtic-91c2d4850e31da1bbd49fc668ae79533e7ac3ab4.tar.zst rtic-91c2d4850e31da1bbd49fc668ae79533e7ac3ab4.zip | |
Shared access is useful with interior mutability
| -rw-r--r-- | book/en/src/by-example/resources.md | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/book/en/src/by-example/resources.md b/book/en/src/by-example/resources.md index d67a72ff..9831e55b 100644 --- a/book/en/src/by-example/resources.md +++ b/book/en/src/by-example/resources.md @@ -114,7 +114,9 @@ are required to access the resource even if the resource is contended by several tasks running at different priorities. The downside is that the task only gets a shared reference (`&-`) to the resource, limiting the operations it can perform on it, but where a shared reference is enough this approach reduces the number -of required locks. +of required locks. In addition to simple immutable data, this shared access can +be useful where the resource type safely implements interior mutability, with +appropriate locking or atomic operations of its own. Note that in this release of RTIC it is not possible to request both exclusive access (`&mut-`) and shared access (`&-`) to the *same* resource from different |