first commit

node_modules/react-native/ReactCommon/react/renderer/animated/MergedValueDispatcher.cpp

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "MergedValueDispatcher.h"
+#include <react/renderer/core/DynamicPropsUtilities.h>
+
+namespace facebook::react {
+
+MergedValueDispatcher::MergedValueDispatcher(
+    DispatchFunction dispatchFunction,
+    MergedValueFunction mergedValueFunction)
+    : dispatchFunction_(std::move(dispatchFunction)),
+      mergedValueFunction_(std::move(mergedValueFunction)) {}
+
+void MergedValueDispatcher::dispatch(
+    const std::unordered_map<Tag, folly::dynamic>& value) {
+  {
+    std::lock_guard<std::mutex> lock(mutex_);
+    for (auto& [viewTag, props] : value) {
+      accumulatedValues_[viewTag] = mergeDynamicProps(
+          accumulatedValues_[viewTag], props, NullValueStrategy::Override);
+    }
+
+    if (hasPendingDispatch_) {
+      return;
+    }
+
+    hasPendingDispatch_ = true;
+  }
+
+  dispatchFunction_([this]() {
+    auto accumulatedValuesCopy = std::unordered_map<Tag, folly::dynamic>{};
+    {
+      std::lock_guard<std::mutex> lock(mutex_);
+      std::swap(accumulatedValues_, accumulatedValuesCopy);
+      hasPendingDispatch_ = false;
+    }
+    mergedValueFunction_(std::move(accumulatedValuesCopy));
+  });
+}
+
+} // namespace facebook::react