Hide nativeMemUtils and pointerSize

Interop/Runtime/src/jvm/kotlin/kotlinx/cinterop/JvmNativeMem.kt

@@ -34,9 +34,11 @@ private val dataModel: DataModel = when (System.getProperty("sun.arch.data.model
 }
 
 // Must be only used in interop, contains host pointer size, not target!
-val pointerSize: Int = dataModel.pointerSize.toInt()
+@PublishedApi
+internal val pointerSize: Int = dataModel.pointerSize.toInt()
 
-object nativeMemUtils {
+@PublishedApi
+internal object nativeMemUtils {
     fun getByte(mem: NativePointed) = unsafe.getByte(mem.address)
     fun putByte(mem: NativePointed, value: Byte) = unsafe.putByte(mem.address, value)
 

Interop/Runtime/src/main/kotlin/kotlinx/cinterop/Utils.kt

@@ -379,3 +379,9 @@ inline fun <R> memScoped(block: MemScope.()->R): R {
         memScope.clear()
     }
 }
+
+fun COpaquePointer.readBytes(count: Int): ByteArray {
+    val result = ByteArray(count)
+    nativeMemUtils.getByteArray(this.reinterpret<ByteVar>().pointed, result, count)
+    return result
+}

Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeMem.kt

@@ -2,13 +2,16 @@ package kotlinx.cinterop
 
 import konan.internal.Intrinsic
 
-inline val pointerSize: Int
+@PublishedApi
+internal inline val pointerSize: Int
     get() = getPointerSize()
 
-@Intrinsic external fun getPointerSize(): Int
+@PublishedApi
+@Intrinsic internal external fun getPointerSize(): Int
 
 // TODO: do not use singleton because it leads to init-check on any access.
-object nativeMemUtils {
+@PublishedApi
+internal object nativeMemUtils {
     @Intrinsic external fun getByte(mem: NativePointed): Byte
     @Intrinsic external fun putByte(mem: NativePointed, value: Byte)