hook up gating to shared native module queue (#41043)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/41043

Changelog: [Internal]

in this change, we create an config pipeline to set `_enableSharedModuleQueue` in TMM

Reviewed By: cipolleschi

Differential Revision: D50398636

fbshipit-source-id: cd8c210ad2ae4774ceb10130a8b80e500d17986a

packages/react-native/React/Base/RCTBridge.h

@@ -57,6 +57,10 @@ void RCTEnableTurboModuleInteropBridgeProxy(BOOL enabled);
 BOOL RCTTurboModuleSyncVoidMethodsEnabled(void);
 void RCTEnableTurboModuleSyncVoidMethods(BOOL enabled);
 
+// Use a shared queue for executing module methods
+BOOL RCTTurboModuleSharedQueueEnabled(void);
+void RCTEnableTurboModuleSharedQueue(BOOL enabled);
+
 typedef enum {
   kRCTBridgeProxyLoggingLevelNone,
   kRCTBridgeProxyLoggingLevelWarning,

packages/react-native/React/Base/RCTBridge.mm

@@ -150,6 +150,18 @@ void RCTEnableTurboModuleSyncVoidMethods(BOOL enabled)
   gTurboModuleEnableSyncVoidMethods = enabled;
 }
 
+// Use a shared queue for executing module methods
+static BOOL gTurboModuleEnableSharedQueue = NO;
+BOOL RCTTurboModuleSharedQueueEnabled(void)
+{
+  return gTurboModuleEnableSharedQueue;
+}
+
+void RCTEnableTurboModuleSharedQueue(BOOL enabled)
+{
+  gTurboModuleEnableSharedQueue = enabled;
+}
+
 @interface RCTBridge () <RCTReloadListener>
 @end
 

packages/react-native/ReactCommon/react/nativemodule/core/platform/ios/ReactCommon/RCTTurboModuleManager.mm

@@ -224,7 +224,7 @@ static Class getFallbackClassFromName(const char *name)
     _bridgeProxy = bridgeProxy;
     _bridgeModuleDecorator = bridgeModuleDecorator;
     _invalidating = false;
-    _enableSharedModuleQueue = NO;
+    _enableSharedModuleQueue = RCTTurboModuleSharedQueueEnabled();
 
     if (_enableSharedModuleQueue) {
       _sharedModuleQueue = dispatch_queue_create("com.meta.react.turbomodulemanager.queue", DISPATCH_QUEUE_SERIAL);