Lil adjustments to delegate syncher

gradle.properties

@@ -4,7 +4,7 @@ kotlin.code.style=official
 specifyKotlinAsDependency=false
 
 projectGroup=ru.dbotthepony.kommons
-projectVersion=3.0.0
+projectVersion=3.0.1
 
 guavaDepVersion=33.0.0
 gsonDepVersion=2.8.9

src/main/kotlin/ru/dbotthepony/kommons/io/DelegateSyncher.kt

@@ -39,7 +39,7 @@ import kotlin.concurrent.withLock
  * Values and delegates can be attached using [add], or by constructing subclassed directly.
  * Delta changes are tracked by [DelegateSyncher.Remote] instances.
  *
- * In general, this class is not meant to be concurrently mutated by different threads,
+ * In general, this class is not meant to be _structurally_ concurrently mutated by different threads,
  * to avoid structure corruption a lock is employed.
  *
  * Attached delegates can be safely mutated by multiple threads concurrently
@@ -630,7 +630,8 @@ class DelegateSyncher : Observer {
 	 * To get changes to be networked to remote client, [write] should be called.
 	 */
 	inner class Remote : Closeable {
-		private val isRemoved = AtomicBoolean()
+		@Volatile
+		private var isRemoved = false
 		internal val dirty = ConcurrentLinkedQueue<RemoteSlot>()
 		private val remoteSlots = CopyOnWriteArrayList<RemoteSlot>()
 
@@ -647,7 +648,7 @@ class DelegateSyncher : Observer {
 			}
 
 			fun markDirty() {
-				if (!isRemoved.get() && isDirty.compareAndSet(false, true)) {
+				if (!isRemoved && isDirty.compareAndSet(false, true)) {
 					dirty.add(this)
 				}
 			}
@@ -819,14 +820,16 @@ class DelegateSyncher : Observer {
 		}
 
 		override fun close() {
-			if (isRemoved.compareAndSet(false, true)) {
+			if (!isRemoved) {
 				lock.withLock {
-					remoteSlots.forEach {
-						it.remove()
-						it.parent.remoteSlots.remove(it)
-					}
+					if (!isRemoved) {
+						remoteSlots.forEach {
+							it.remove()
+							it.parent.remoteSlots.remove(it)
+						}
 
-					remotes.remove(this)
+						remotes.remove(this)
+					}
 				}
 
 				dirty.clear()