move shared data structures to external module

1 files changed, 0 insertions, 53 deletions

diff --git a/share.go b/share.go
deleted file mode 100644
index 36b903b..0000000
--- a/share.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package gui
-
-// sharedVal is a concurrent interface to a piece of shared data.
-//
-// A client can read the data by sending a channel via request, and the stored value will
-// be sent back via the channel. The client is responsible for closing the channel.
-//
-// The stored value can be changed by sending the new value via set. Requests block until
-// the first value is received on set.
-//
-// A sharedVal should be closed after use.
-type sharedVal[T any] struct {
-	request chan<- chan T
-	set     chan<- T
-}
-
-func newSharedVal[T any]() sharedVal[T] {
-	request := make(chan chan T)
-	set := make(chan T)
-	go func() {
-		val := <-set // wait for initial value
-		for {
-			select {
-			case v, ok := <-set:
-				if !ok { // closed
-					return
-				}
-				val = v
-			case req, ok := <-request:
-				if !ok { // closed
-					return
-				}
-				go func() { // don't wait for client to receive
-					req <- val
-				}()
-			}
-		}
-	}()
-	return sharedVal[T]{request, set}
-}
-
-// get makes a synchronous request and returns the stored value.
-func (sv sharedVal[T]) get() T {
-	c := make(chan T)
-	defer close(c)
-	sv.request <- c
-	return <-c
-}
-
-func (sv sharedVal[T]) close() {
-	close(sv.request)
-	close(sv.set)
-}