[cpp] Typed Thread and TLS (#12885)

* Typed thread and tls

* Add scratch class extern

Author: Aidan63

std/cpp/Scratch.hx

@@ -0,0 +1,10 @@
+package cpp;
+
+@:include("hx/thread/Scratch.hpp")
+@:semantics(value)
+@:cpp.ValueType({ namespace : [ "hx", "thread" ], flags : [ StackOnly ] })
+private extern class Scratch {
+	final view : cpp.marshal.View<cpp.UInt8>;
+
+	static function alloc(bytes:Int):Scratch;
+}

std/cpp/_std/sys/thread/ThreadImpl.hx

@@ -22,27 +22,32 @@
 
 package sys.thread;
 
-@:callable
-@:coreType
-private abstract NativeThreadHandle {}
-
-private typedef ThreadHandle = NativeThreadHandle;
+@:include("hx/thread/Thread.hpp")
+@:cpp.ManagedType({ namespace : [ "hx", "thread" ], type : "Thread", flags : [ StandardNaming ] })
+private extern class NativeThread {
+	static function create(job:()->Void):NativeThread;
+	static function current():NativeThread;
+
+	function getName():String;
+	function setName(name:String):Void;
+}
 
-abstract ThreadImpl(ThreadHandle) {
+abstract ThreadImpl(NativeThread) {
 
 	public static #if !scriptable inline #end function current():ThreadImpl {
-		return untyped __global__.__hxcpp_thread_current();
+		return cast NativeThread.current();
 	}
 
 	public static #if !scriptable inline #end function create(job:Void->Void):ThreadImpl {
-		return untyped __global__.__hxcpp_thread_create(job);
+		return cast NativeThread.create(job);
 	}
 
 	public static function setName( t : ThreadImpl, name : String ) {
+		(cast t : NativeThread).setName(name);
 	}
 
 	public static function getName( t : ThreadImpl ) {
-		return null;
+		return (cast t : NativeThread).getName();
 	}
 
 }

std/cpp/_std/sys/thread/Tls.hx

@@ -22,28 +22,32 @@
 
 package sys.thread;
 
+@:include("hx/thread/ThreadLocal.hpp")
+@:cpp.ManagedType({ namespace : [ "hx", "thread" ], flags : [ StandardNaming ] })
+private extern class ThreadLocal {
+	function new():Void;
+	
+	function get():Dynamic;
+	function set(obj:Dynamic):Void;
+}
+
 @:coreApi
 class Tls<T> {
-	static var sFreeSlot:Int;
-
-	var mTLSID:Int;
+	final tls:ThreadLocal;
 
 	public var value(get, set):Null<T>;
 
 	public function new() {
-		mTLSID = sFreeSlot++;
+		tls = new ThreadLocal();
 	}
 
 	function get_value():Null<T> {
-		return untyped __global__.__hxcpp_tls_get(mTLSID);
+		return tls.get();
 	}
 
 	function set_value(v:Null<T>):Null<T> {
-		untyped __global__.__hxcpp_tls_set(mTLSID, v);
-		return v;
-	}
+		tls.set(v);
 
-	static function __init__ ():Void {
-		sFreeSlot = 0;
+		return v;
 	}
 }