PassFish: Initial Commit

Well, that's a lie. But nobody needs to see all the iterations I decided
to sweep under the rug.
That said, I think the repo is, while not clean, clean enough now, to
not be embarrassed by uploading it to github.

1 files changed, 17 insertions, 0 deletions

diff --git a/rust/src/implementation/passwordmaker/emittingsender.rs b/rust/src/implementation/passwordmaker/emittingsender.rs
new file mode 100644
index 0000000..1cf58fc
--- /dev/null
+++ b/rust/src/implementation/passwordmaker/emittingsender.rs
@@ -0,0 +1,17 @@
+use std::sync::mpsc::{channel,Sender,Receiver,SendError};
+#[derive(Clone)]
+pub(crate) struct EmittingSender<MT, E : Fn()> {
+    sender : Sender<MT>,
+    emit : E,
+}
+
+impl <MT, E : Fn()> EmittingSender<MT, E>{
+    pub(crate) fn emitting_channel(emit : E) -> (Self, Receiver<MT>) {
+        let (sender,r) = channel();
+        (EmittingSender { sender, emit }, r)
+    }
+    pub(crate) fn send(&self, t: MT) -> Result<(), SendError<MT>> {
+        //first send, then notify.
+        self.sender.send(t).map(|_| (self.emit)())
+    }
+}