diff --git a/runtime/src/launcher/cpp/launcher.cpp b/runtime/src/launcher/cpp/launcher.cpp
index ca80467efed..2641cf67595 100644
--- a/runtime/src/launcher/cpp/launcher.cpp
+++ b/runtime/src/launcher/cpp/launcher.cpp
@@ -45,15 +45,11 @@ extern "C" KInt Konan_run_start(int argc, const char** argv) {
 }
 
 extern "C" RUNTIME_USED int Konan_main(int argc, const char** argv) {
-  RuntimeState* state = InitRuntime();
-
-  if (state == nullptr) {
-    return 2;
-  }
+  Kotlin_initRuntimeIfNeeded();
 
   KInt exitStatus = Konan_run_start(argc, argv);
 
-  DeinitRuntime(state);
+  Kotlin_deinitRuntimeIfNeeded();
 
   return exitStatus;
 }
diff --git a/runtime/src/main/cpp/Runtime.cpp b/runtime/src/main/cpp/Runtime.cpp
index 5f7541314eb..73e98353545 100644
--- a/runtime/src/main/cpp/Runtime.cpp
+++ b/runtime/src/main/cpp/Runtime.cpp
@@ -45,6 +45,24 @@ void InitOrDeinitGlobalVariables(int initialize) {
 
 THREAD_LOCAL_VARIABLE RuntimeState* runtimeState = nullptr;
 
+RuntimeState* initRuntime() {
+  SetKonanTerminateHandler();
+  RuntimeState* result = konanConstructInstance<RuntimeState>();
+  if (!result) return nullptr;
+  result->memoryState = InitMemory();
+  // Keep global variables in state as well.
+  InitOrDeinitGlobalVariables(true);
+  konan::consoleInit();
+  return result;
+}
+
+void deinitRuntime(RuntimeState* state) {
+  if (state != nullptr) {
+    InitOrDeinitGlobalVariables(false);
+    DeinitMemory(state->memoryState);
+    konanDestructInstance(state);
+  }
+}
 }  // namespace
 
 extern "C" {
@@ -59,29 +77,9 @@ void AppendToInitializersTail(InitNode *next) {
   initTailNode = next;
 }
 
-// TODO: properly use RuntimeState.
-RuntimeState* InitRuntime() {
-  SetKonanTerminateHandler();
-  RuntimeState* result = konanConstructInstance<RuntimeState>();
-  result->memoryState = InitMemory();
-  // Keep global variables in state as well.
-  InitOrDeinitGlobalVariables(true);
-  konan::consoleInit();
-  runtimeState = result;
-  return result;
-}
-
-void DeinitRuntime(RuntimeState* state) {
-  if (state != nullptr) {
-    InitOrDeinitGlobalVariables(false);
-    DeinitMemory(state->memoryState);
-    konanDestructInstance(state);
-  }
-}
-
 void Kotlin_initRuntimeIfNeeded() {
   if (runtimeState == nullptr) {
-    runtimeState = InitRuntime();
+    runtimeState = initRuntime();
     // Register runtime deinit function at thread cleanup.
     konan::onThreadExit(Kotlin_deinitRuntimeIfNeeded);
 #ifndef KONAN_WASM
@@ -98,7 +96,7 @@ void Kotlin_initRuntimeIfNeeded() {
 
 void Kotlin_deinitRuntimeIfNeeded() {
   if (runtimeState != nullptr) {
-     DeinitRuntime(runtimeState);
+     deinitRuntime(runtimeState);
      runtimeState = nullptr;
   }
 }
diff --git a/runtime/src/main/cpp/Runtime.h b/runtime/src/main/cpp/Runtime.h
index 59e237c8134..a097a4f2c6b 100644
--- a/runtime/src/main/cpp/Runtime.h
+++ b/runtime/src/main/cpp/Runtime.h
@@ -24,8 +24,6 @@ struct InitNode;
 extern "C" {
 #endif
 
-RuntimeState* InitRuntime();
-void DeinitRuntime(RuntimeState* state);
 void Kotlin_initRuntimeIfNeeded();
 void Kotlin_deinitRuntimeIfNeeded();
 
diff --git a/runtime/src/main/cpp/Worker.cpp b/runtime/src/main/cpp/Worker.cpp
index 659462ee7d5..5f97b6fe59f 100644
--- a/runtime/src/main/cpp/Worker.cpp
+++ b/runtime/src/main/cpp/Worker.cpp
@@ -364,7 +364,7 @@ extern "C" void ReportUnhandledException(KRef e);
 void* workerRoutine(void* argument) {
   Worker* worker = reinterpret_cast<Worker*>(argument);
 
-  RuntimeState* state = InitRuntime();
+  Kotlin_initRuntimeIfNeeded();
   while (true) {
     Job job = worker->getJob();
     if (job.function == nullptr) {
@@ -391,7 +391,7 @@ void* workerRoutine(void* argument) {
     job.future->storeResultUnlocked(result);
   }
 
-  DeinitRuntime(state);
+  Kotlin_deinitRuntimeIfNeeded();
 
   konanDestructInstance(worker);
 
diff --git a/samples/videoplayer/src/main/kotlin/DecoderWorker.kt b/samples/videoplayer/src/main/kotlin/DecoderWorker.kt
index 7a91d805aeb..2a596d3519b 100644
--- a/samples/videoplayer/src/main/kotlin/DecoderWorker.kt
+++ b/samples/videoplayer/src/main/kotlin/DecoderWorker.kt
@@ -393,9 +393,9 @@ class DecodeWorker {
 
     fun nextAudioFrame(size: Int) = decodeWorker.schedule(
             TransferMode.CHECKED,
-            { size as Int? }) { input -> state!!.nextAudioFrame(input!!) }.result()
+            { size }) { input -> state!!.nextAudioFrame(input) }.result()
 
     fun audioVideoSynced() = decodeWorker.schedule(
             TransferMode.CHECKED,
-            { null }) { _ -> state!!.audioVideoSynced() as Boolean? }.consume { it -> it!! }
+            { null }) { _ -> state!!.audioVideoSynced() }.result()
 }