'[skip ci] [RN] Move feature flags for the event loop to ReactNativeF…

…eatureFlags (#42434)

Summary:
Pull Request resolved: #42434

Changelog: [internal]

Differential Revision: D52819137

fbshipit-source-id: 9fb31c706f512c2f8a57f76ff813879363603efc

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/config/ReactFeatureFlags.java

@@ -142,12 +142,6 @@ public class ReactFeatureFlags {
   /** When enabled, rawProps in Props will not include Yoga specific props. */
   public static boolean excludeYogaFromRawProps = false;
 
-  /**
-   * When enabled, it uses the modern fork of RuntimeScheduler that allows scheduling tasks with
-   * priorities from any thread.
-   */
-  public static boolean useModernRuntimeScheduler = false;
-
   /**
    * Enables storing js caller stack when creating promise in native module. This is useful in case
    * of Promise rejection and tracing the cause.

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlags.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<941c7eb38bebe95c3b038de7bf3ae912>>
+ * @generated SignedSource<<b3f5ae8120b28020b7d5f3ff4780f57b>>
  */
 
 /**
@@ -27,6 +27,21 @@ object ReactNativeFeatureFlags {
    */
   fun commonTestFlag() = accessor.commonTestFlag()
 
+  /**
+   * When enabled, it uses the modern fork of RuntimeScheduler that allows scheduling tasks with priorities from any thread.
+   */
+  fun useModernRuntimeScheduler() = accessor.useModernRuntimeScheduler()
+
+  /**
+   * Enables the use of microtasks in Hermes (scheduling) and RuntimeScheduler (execution).
+   */
+  fun enableMicrotasks() = accessor.enableMicrotasks()
+
+  /**
+   * When enabled, the RuntimeScheduler processing the event loop will batch all rendering updates and dispatch them together at the end of each iteration of the loop.
+   */
+  fun batchRenderingUpdatesInEventLoop() = accessor.batchRenderingUpdatesInEventLoop()
+
   /**
    * Overrides the feature flags with the ones provided by the given provider.
    */

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<e90fe3ecb417f22607ac92b7fb19e85c>>
+ * @generated SignedSource<<e0db236347cb893ecd320bcc72b1b9a4>>
  */
 
 /**
@@ -21,6 +21,9 @@ package com.facebook.react.internal.featureflags
 
 class ReactNativeFeatureFlagsAccessor {
   var commonTestFlagCache: Boolean? = null
+  var useModernRuntimeSchedulerCache: Boolean? = null
+  var enableMicrotasksCache: Boolean? = null
+  var batchRenderingUpdatesInEventLoopCache: Boolean? = null
 
   fun commonTestFlag(): Boolean {
     var cached = commonTestFlagCache
@@ -30,4 +33,31 @@ class ReactNativeFeatureFlagsAccessor {
     }
     return cached
   }
+
+  fun useModernRuntimeScheduler(): Boolean {
+    var cached = useModernRuntimeSchedulerCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.useModernRuntimeScheduler()
+      useModernRuntimeSchedulerCache = cached
+    }
+    return cached
+  }
+
+  fun enableMicrotasks(): Boolean {
+    var cached = enableMicrotasksCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableMicrotasks()
+      enableMicrotasksCache = cached
+    }
+    return cached
+  }
+
+  fun batchRenderingUpdatesInEventLoop(): Boolean {
+    var cached = batchRenderingUpdatesInEventLoopCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.batchRenderingUpdatesInEventLoop()
+      batchRenderingUpdatesInEventLoopCache = cached
+    }
+    return cached
+  }
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxInterop.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<667e03a6b8ae493f3c75f1a831184055>>
+ * @generated SignedSource<<1d1f06c0c4adf980d2725afb995aab7d>>
  */
 
 /**
@@ -29,6 +29,9 @@ object ReactNativeFeatureFlagsCxxInterop {
   }
 
   @DoNotStrip @JvmStatic external fun commonTestFlag(): Boolean
+  @DoNotStrip @JvmStatic external fun useModernRuntimeScheduler(): Boolean
+  @DoNotStrip @JvmStatic external fun enableMicrotasks(): Boolean
+  @DoNotStrip @JvmStatic external fun batchRenderingUpdatesInEventLoop(): Boolean
 
   @DoNotStrip @JvmStatic external fun override(provider: Any)
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<35de3b0df307b57616b1da2c31d0e918>>
+ * @generated SignedSource<<3aeb4bb38c6c3e2d6ea8e868d6cd104f>>
  */
 
 /**
@@ -24,4 +24,7 @@ open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvider {
   // but that is more expensive than just duplicating the defaults here.
 
   override fun commonTestFlag(): Boolean = false
+  override fun useModernRuntimeScheduler(): Boolean = false
+  override fun enableMicrotasks(): Boolean = false
+  override fun batchRenderingUpdatesInEventLoop(): Boolean = false
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9f38db38c05560c89d27ce8c70000332>>
+ * @generated SignedSource<<6547cf335e54203e8ebfca6d737203e2>>
  */
 
 /**
@@ -21,4 +21,7 @@ package com.facebook.react.internal.featureflags
 
 interface ReactNativeFeatureFlagsProvider {
   fun commonTestFlag(): Boolean
+  fun useModernRuntimeScheduler(): Boolean
+  fun enableMicrotasks(): Boolean
+  fun batchRenderingUpdatesInEventLoop(): Boolean
 }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/runtime/ReactInstance.java

@@ -170,9 +170,6 @@ public void onHostDestroy() {
     // Notify JS if profiling is enabled
     boolean isProfiling =
         Systrace.isTracing(Systrace.TRACE_TAG_REACT_APPS | Systrace.TRACE_TAG_REACT_JS_VM_CALLS);
-    // TODO(T166383606): Remove this parameter when we remove the legacy runtime scheduler or we
-    // have access to ReactNativeConfig before we initialize it.
-    boolean useModernRuntimeScheduler = ReactFeatureFlags.useModernRuntimeScheduler;
     mHybridData =
         initHybrid(
             jsRuntimeFactory,
@@ -182,8 +179,7 @@ public void onHostDestroy() {
             jsTimerExecutor,
             reactExceptionManager,
             bindingsInstaller,
-            isProfiling,
-            useModernRuntimeScheduler);
+            isProfiling);
 
     // Set up TurboModules
     Systrace.beginSection(
@@ -457,8 +453,7 @@ private native HybridData initHybrid(
       JSTimerExecutor jsTimerExecutor,
       ReactJsExceptionHandler jReactExceptionsManager,
       @Nullable BindingsInstaller jBindingsInstaller,
-      boolean isProfiling,
-      boolean useModernRuntimeScheduler);
+      boolean isProfiling);
 
   @DoNotStrip
   private static native JSTimerExecutor createJSTimerExecutor();

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<0c0fd104af5903288313b9e33fcc3da4>>
+ * @generated SignedSource<<f19fdf957592a605d818e7576a059982>>
  */
 
 /**
@@ -28,6 +28,21 @@ bool JReactNativeFeatureFlagsCxxInterop::commonTestFlag(
   return ReactNativeFeatureFlags::commonTestFlag();
 }
 
+bool JReactNativeFeatureFlagsCxxInterop::useModernRuntimeScheduler(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::useModernRuntimeScheduler();
+}
+
+bool JReactNativeFeatureFlagsCxxInterop::enableMicrotasks(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableMicrotasks();
+}
+
+bool JReactNativeFeatureFlagsCxxInterop::batchRenderingUpdatesInEventLoop(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::batchRenderingUpdatesInEventLoop();
+}
+
 void JReactNativeFeatureFlagsCxxInterop::override(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/,
     jni::alias_ref<jobject> provider) {
@@ -48,6 +63,15 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "commonTestFlag",
         JReactNativeFeatureFlagsCxxInterop::commonTestFlag),
+      makeNativeMethod(
+        "useModernRuntimeScheduler",
+        JReactNativeFeatureFlagsCxxInterop::useModernRuntimeScheduler),
+      makeNativeMethod(
+        "enableMicrotasks",
+        JReactNativeFeatureFlagsCxxInterop::enableMicrotasks),
+      makeNativeMethod(
+        "batchRenderingUpdatesInEventLoop",
+        JReactNativeFeatureFlagsCxxInterop::batchRenderingUpdatesInEventLoop),
   });
 }
 

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<92dbf3bd6e30ad982edb39de8a0ca392>>
+ * @generated SignedSource<<6e949d7527942b6337b80caad83bce56>>
  */
 
 /**
@@ -33,6 +33,15 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool commonTestFlag(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
+  static bool useModernRuntimeScheduler(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
+  static bool enableMicrotasks(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
+  static bool batchRenderingUpdatesInEventLoop(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
   static void override(
       facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>,
       jni::alias_ref<jobject> provider);

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/ReactNativeFeatureFlagsProviderHolder.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<5ed61cfc9fb54e538493d042e789dd50>>
+ * @generated SignedSource<<f6ce1468b1bec8a54c0119225264bc70>>
  */
 
 /**
@@ -29,4 +29,28 @@ bool ReactNativeFeatureFlagsProviderHolder::commonTestFlag() {
   return method(javaProvider_);
 }
 
+bool ReactNativeFeatureFlagsProviderHolder::useModernRuntimeScheduler() {
+  static const auto method =
+      facebook::jni::findClassStatic(
+          "com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider")
+          ->getMethod<jboolean()>("useModernRuntimeScheduler");
+  return method(javaProvider_);
+}
+
+bool ReactNativeFeatureFlagsProviderHolder::enableMicrotasks() {
+  static const auto method =
+      facebook::jni::findClassStatic(
+          "com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider")
+          ->getMethod<jboolean()>("enableMicrotasks");
+  return method(javaProvider_);
+}
+
+bool ReactNativeFeatureFlagsProviderHolder::batchRenderingUpdatesInEventLoop() {
+  static const auto method =
+      facebook::jni::findClassStatic(
+          "com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider")
+          ->getMethod<jboolean()>("batchRenderingUpdatesInEventLoop");
+  return method(javaProvider_);
+}
+
 } // namespace facebook::react

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/ReactNativeFeatureFlagsProviderHolder.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<3a53c648a733faf65e0524c629348a05>>
+ * @generated SignedSource<<aef8c7b8135676f64ae58a2fa22e733c>>
  */
 
 /**
@@ -36,6 +36,9 @@ class ReactNativeFeatureFlagsProviderHolder
       : javaProvider_(make_global(javaProvider)){};
 
   bool commonTestFlag() override;
+  bool useModernRuntimeScheduler() override;
+  bool enableMicrotasks() override;
+  bool batchRenderingUpdatesInEventLoop() override;
 
  private:
   jni::global_ref<jobject> javaProvider_;

packages/react-native/ReactAndroid/src/main/jni/react/runtime/jni/JReactInstance.cpp

@@ -36,8 +36,7 @@ JReactInstance::JReactInstance(
     jni::alias_ref<JJSTimerExecutor::javaobject> jsTimerExecutor,
     jni::alias_ref<JReactExceptionManager::javaobject> jReactExceptionManager,
     jni::alias_ref<JBindingsInstaller::javaobject> jBindingsInstaller,
-    bool isProfiling,
-    bool useModernRuntimeScheduler) noexcept {
+    bool isProfiling) noexcept {
   // TODO(janzer): Lazily create runtime
   auto sharedJSMessageQueueThread =
       std::make_shared<JMessageQueueThread>(jsMessageQueueThread);
@@ -65,8 +64,7 @@ JReactInstance::JReactInstance(
       jsRuntimeFactory->cthis()->createJSRuntime(sharedJSMessageQueueThread),
       sharedJSMessageQueueThread,
       timerManager,
-      std::move(jsErrorHandlingFunc),
-      useModernRuntimeScheduler);
+      std::move(jsErrorHandlingFunc));
 
   auto bufferedRuntimeExecutor = instance_->getBufferedRuntimeExecutor();
   timerManager->setRuntimeExecutor(bufferedRuntimeExecutor);
@@ -117,8 +115,7 @@ jni::local_ref<JReactInstance::jhybriddata> JReactInstance::initHybrid(
     jni::alias_ref<JJSTimerExecutor::javaobject> jsTimerExecutor,
     jni::alias_ref<JReactExceptionManager::javaobject> jReactExceptionManager,
     jni::alias_ref<JBindingsInstaller::javaobject> jBindingsInstaller,
-    bool isProfiling,
-    bool useModernRuntimeScheduler) {
+    bool isProfiling) {
   return makeCxxInstance(
       jsRuntimeFactory,
       jsMessageQueueThread,
@@ -127,8 +124,7 @@ jni::local_ref<JReactInstance::jhybriddata> JReactInstance::initHybrid(
       jsTimerExecutor,
       jReactExceptionManager,
       jBindingsInstaller,
-      isProfiling,
-      useModernRuntimeScheduler);
+      isProfiling);
 }
 
 void JReactInstance::loadJSBundleFromAssets(

packages/react-native/ReactAndroid/src/main/jni/react/runtime/jni/JReactInstance.h

@@ -45,8 +45,7 @@ class JReactInstance : public jni::HybridClass<JReactInstance> {
       jni::alias_ref<JJSTimerExecutor::javaobject> jsTimerExecutor,
       jni::alias_ref<JReactExceptionManager::javaobject> jReactExceptionManager,
       jni::alias_ref<JBindingsInstaller::javaobject> jBindingsInstaller,
-      bool isProfiling,
-      bool useModernRuntimeScheduler);
+      bool isProfiling);
 
   /*
    * Instantiates and returns an instance of `JSTimerExecutor`.
@@ -91,8 +90,7 @@ class JReactInstance : public jni::HybridClass<JReactInstance> {
       jni::alias_ref<JJSTimerExecutor::javaobject> jsTimerExecutor,
       jni::alias_ref<JReactExceptionManager::javaobject> jReactExceptionManager,
       jni::alias_ref<JBindingsInstaller::javaobject> jBindingsInstaller,
-      bool isProfiling,
-      bool useModernRuntimeScheduler) noexcept;
+      bool isProfiling) noexcept;
 
   jni::alias_ref<CallInvokerHolder::javaobject> getJSCallInvokerHolder();
   jni::alias_ref<NativeMethodCallInvokerHolder::javaobject>

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9e0a265d128f9160e999a62597098057>>
+ * @generated SignedSource<<d1032ce28d8917c451752a0087051736>>
  */
 
 /**
@@ -25,6 +25,18 @@ bool ReactNativeFeatureFlags::commonTestFlag() {
   return getAccessor().commonTestFlag();
 }
 
+bool ReactNativeFeatureFlags::useModernRuntimeScheduler() {
+  return getAccessor().useModernRuntimeScheduler();
+}
+
+bool ReactNativeFeatureFlags::enableMicrotasks() {
+  return getAccessor().enableMicrotasks();
+}
+
+bool ReactNativeFeatureFlags::batchRenderingUpdatesInEventLoop() {
+  return getAccessor().batchRenderingUpdatesInEventLoop();
+}
+
 void ReactNativeFeatureFlags::override(
     std::unique_ptr<ReactNativeFeatureFlagsProvider> provider) {
   getAccessor().override(std::move(provider));