[runtime] Introduce thread states

kotlin-native/runtime/src/main/cpp/CompilerExport.cpp

@@ -42,4 +42,6 @@ void EnsureDeclarationsEmitted() {
     ensureUsed(FreezeSubgraph);
     ensureUsed(FreezeSubgraph);
     ensureUsed(CheckGlobalsAccessible);
+    ensureUsed(Kotlin_mm_switchThreadStateNative);
+    ensureUsed(Kotlin_mm_switchThreadStateRunnable);
 }

kotlin-native/runtime/src/main/cpp/Memory.h

@@ -268,6 +268,11 @@ void AdoptReferenceFromSharedVariable(ObjHeader* object);
 
 void CheckGlobalsAccessible();
 
+// Sets state of the current thread to NATIVE (used by the new MM).
+ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateNative();
+// Sets state of the current thread to RUNNABLE (used by the new MM).
+ALWAYS_INLINE RUNTIME_NOTHROW void Kotlin_mm_switchThreadStateRunnable();
+
 #ifdef __cplusplus
 }
 #endif