HandleWrapper

src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/HandleWrapper.kt

@@ -0,0 +1,27 @@
+package ru.landgrafhomyak.utility.closeable_state_1
+
+import kotlin.contracts.InvocationKind
+import kotlin.contracts.contract
+
+public class HandleWrapper<H>(
+	handle: H,
+	state: CloseableState,
+) {
+	private val _unprotected = handle
+	private val _state: CloseableState = state
+
+	public fun <R> useHandle(method: (H) -> R): R {
+		contract {
+			callsInPlace(method, InvocationKind.EXACTLY_ONCE)
+		}
+
+		return this._state.withUse { method(this._unprotected) }
+	}
+
+	@ManualStateManipulation
+	private fun close() {
+		this._state.close()
+	}
+
+	override fun toString(): String = "<wrapper of handle=${this._unprotected} protected with state=${this._state}>"
+}