embassy_sync: `Sink` adapter for `pubsub::Pub`

Corresponding to the `Stream` impl for `pubsub::Sub`. Notable
difference is that we need a separate adapter type to store
the pending item, i.e. we can't `impl Sink for Pub` directly.
Instead a method `Pub::sink(&self)` is exposed, which
constructs a `PubSink`.

1 files changed, 2 insertions, 1 deletions

diff --git a/embassy-sync/Cargo.toml b/embassy-sync/Cargo.toml
index 7b7d2bf8e..2f049b6bc 100644
--- a/embassy-sync/Cargo.toml
+++ b/embassy-sync/Cargo.toml
@@ -27,6 +27,7 @@ turbowakers = []
 defmt = { version = "0.3", optional = true }
 log = { version = "0.4.14", optional = true }
 
+futures-sink = { version = "0.3", default-features = false, features = [] }
 futures-util = { version = "0.3.17", default-features = false }
 critical-section = "1.1"
 heapless = "0.8"
@@ -37,7 +38,7 @@ embedded-io-async = { version = "0.6.1" }
 futures-executor = { version = "0.3.17", features = [ "thread-pool" ] }
 futures-test = "0.3.17"
 futures-timer = "3.0.2"
-futures-util = { version = "0.3.17", features = [ "channel" ] }
+futures-util = { version = "0.3.17", features = [ "channel", "sink" ] }
 
 # Enable critical-section implementation for std, for tests
 critical-section = { version = "1.1", features = ["std"] }