add actions actor

CHANGELOG.md

@@ -5,6 +5,8 @@
 * `Versions`:
     * `Kotlin`: `1.4.30` -> `1.4.31`
     * `Ktor`: `1.5.1` -> `1.5.2`
+* `Coroutines`
+    * Add `createActionsActor`/`createSafeActionsActor` and `doWithSuspending`
 
 ## 0.4.27
 

coroutines/src/commonMain/kotlin/dev/inmo/micro_utils/coroutines/ActionsActor.kt

@@ -0,0 +1,46 @@
+package dev.inmo.micro_utils.coroutines
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.channels.Channel
+import kotlin.coroutines.*
+
+interface ActorAction<T> {
+    suspend operator fun invoke(): T
+}
+
+/**
+ * Planned to use with [doWithSuspending]. Will execute incoming lambdas sequentially
+ *
+ * @see actor
+ */
+fun CoroutineScope.createActionsActor() = actor<suspend () -> Unit> {
+    it()
+}
+
+/**
+ * Planned to use with [doWithSuspending]. Will execute incoming lambdas sequentially
+ *
+ * @see safeActor
+ */
+inline fun CoroutineScope.createSafeActionsActor(
+    noinline onException: ExceptionHandler<Unit> = defaultSafelyExceptionHandler
+) = safeActor<suspend () -> Unit>(Channel.UNLIMITED, onException) {
+    it()
+}
+
+/**
+ * Must be use with actor created by [createActionsActor] or [createSafeActionsActor]. Will send lambda which will
+ * execute [action] and return result.
+ *
+ * @see suspendCoroutine
+ * @see safely
+ */
+suspend fun <T> Channel<suspend () -> Unit>.doWithSuspending(
+    action: ActorAction<T>
+) = suspendCoroutine<T> {
+    offer {
+        safely({ e -> it.resumeWithException(e) }) {
+            it.resume(action())
+        }
+    }
+}