Move TurboModule Core from ReactCommon/turbomodule to ReactCommon/react/nativemodule

Summary:
This diff moves the code of TurboModule Core from ReactCommon/turbomodule to ReactCommon/react/nativemodule

For iOS: Pod spec name stays as "ReactCommon/turbomodule/..." for now, only the source/header location is affected. The target will be renamed/restructured closer to TurboModule rollout.

changelog: [internal] Internal

Reviewed By: RSNara

Differential Revision: D23362253

fbshipit-source-id: c2c8207578e50821c7573255d4319b9051b58a37

ReactCommon/react/nativemodule/core/TurboModule.cpp

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "TurboModule.h"
+
+using namespace facebook;
+
+namespace facebook {
+namespace react {
+
+TurboModule::TurboModule(
+    const std::string &name,
+    std::shared_ptr<CallInvoker> jsInvoker)
+    : name_(name), jsInvoker_(jsInvoker) {}
+
+TurboModule::~TurboModule() {}
+
+jsi::Value TurboModule::get(
+    jsi::Runtime &runtime,
+    const jsi::PropNameID &propName) {
+  std::string propNameUtf8 = propName.utf8(runtime);
+  auto p = methodMap_.find(propNameUtf8);
+  if (p == methodMap_.end()) {
+    // Method was not found, let JS decide what to do.
+    return jsi::Value::undefined();
+  }
+  MethodMetadata meta = p->second;
+  return jsi::Function::createFromHostFunction(
+      runtime,
+      propName,
+      meta.argCount,
+      [this, meta](
+          facebook::jsi::Runtime &rt,
+          const facebook::jsi::Value &thisVal,
+          const facebook::jsi::Value *args,
+          size_t count) { return meta.invoker(rt, *this, args, count); });
+}
+
+} // namespace react
+} // namespace facebook