Add android polyfill error thrower

Author: mrousavy

android/CMakeLists.txt

@@ -5,11 +5,11 @@ set (CMAKE_CXX_STANDARD 11)
 
 add_library(rnmultithreading
             SHARED
-            ../cpp/RNMultithreadingInstaller.cpp
+#            ../cpp/RNMultithreadingInstaller.cpp
             cpp-adapter.cpp
             ../../react-native/ReactCommon/jsi/jsi/jsi.cpp
-            ../../react-native-reanimated/android/src/main/cpp/AndroidErrorHandler.cpp
-            ../../react-native-reanimated/android/src/main/cpp/AndroidScheduler.cpp
+#            ../../react-native-reanimated/android/src/main/cpp/AndroidErrorHandler.cpp
+#            ../../react-native-reanimated/android/src/main/cpp/AndroidScheduler.cpp
 )
 
 # Specifies a path to native header files.
@@ -18,9 +18,9 @@ include_directories(
         ../../react-native/React
         ../../react-native/React/Base
         ../../react-native/ReactCommon/jsi
-        ../../react-native-reanimated/android/src/main/cpp/headers
-        ../../react-native-reanimated/Common/cpp/headers
-        ../../react-native-reanimated/Common/cpp/hidden_headers
+#        ../../react-native-reanimated/android/src/main/cpp/headers
+#        ../../react-native-reanimated/Common/cpp/headers
+#        ../../react-native-reanimated/Common/cpp/hidden_headers
 )
 
 find_library(

android/cpp-adapter.cpp

@@ -1,27 +1,24 @@
 #include <jni.h>
 #include <jsi/jsi.h>
-#include <jsi/JSIDynamic.h>
-#include "RNMultithreadingInstaller.h"
-#include "AndroidErrorHandler.h"
-#include "AndroidScheduler.h"
-#include <memory>
 
 using namespace facebook;
 
 extern "C"
 JNIEXPORT void JNICALL
-Java_com_reactnativemultithreading_MultithreadingModule_nativeInstallMultithreading(JNIEnv *env,
-        jobject clazz,
-        jlong jsiPtr,
-        jni::alias_ref<facebook::react::CallInvokerHolder::javaobject> jsCallInvokerHolder,
-        jni::alias_ref<AndroidScheduler::javaobject> androidScheduler) {
+Java_com_reactnativemultithreading_MultithreadingModule_nativeInstallMultithreading(JNIEnv *env, jobject clazz, jlong jsiPtr) {
     auto runtime = reinterpret_cast<jsi::Runtime*>(jsiPtr);
-    return mrousavy::multithreading::install(*runtime, []() {
-        auto jsCallInvoker = jsCallInvokerHolder->cthis()->getCallInvoker();
-        auto scheduler = androidScheduler->cthis()->getScheduler();
-        scheduler->setJSCallInvoker(jsCallInvoker);
-        return scheduler;
-    }, [](std::shared_ptr<reanimated::AndroidScheduler> scheduler) {
-        return std::make_shared<reanimated::AndroidErrorHandler>(scheduler);
-    });
+
+    // TODO: Implement multithreading for Android.
+    //  The only problem I have with this is that I cannot really import/include the Reanimated library since that is a prebuilt .aar.
+    //  That means, I cannot import it's headers, I cannot link it, and I cannot create instances of ShareableValue, AndroidErrorHandler, AndroidScheduler, ...
+    runtime->global().setProperty(*runtime,
+            "spawnThread",
+            jsi::Function::createFromHostFunction(*runtime,
+                    jsi::PropNameID::forAscii(*runtime, "spawnThread"),
+                    1,
+                    [](jsi::Runtime& runtime, const jsi::Value& thisValue, const jsi::Value* arguments, size_t count) -> jsi::Value {
+                auto promise = runtime.global().getProperty(runtime, "Promise").asObject(runtime);
+                auto rejecter = promise.getProperty(runtime, "reject");
+                return rejecter.asObject(runtime).asFunction(runtime).call(runtime, jsi::JSError(runtime, "Multithreading is not yet supported on Android.").value());
+    }));
 }

android/src/main/java/com/reactnativemultithreading/MultithreadingModule.java

@@ -4,14 +4,14 @@
 
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;
-import com.swmansion.reanimated.Scheduler;
+//import com.swmansion.reanimated.Scheduler;
 
 public class MultithreadingModule extends ReactContextBaseJavaModule {
   static {
     System.loadLibrary("rnmultithreading");
   }
 
-  private native void nativeInstallMultithreading(long jsiPtr, Scheduler scheduler);
+  private native void nativeInstallMultithreading(long jsiPtr);
 
   public MultithreadingModule(ReactApplicationContext context) {
     super(context);
@@ -28,8 +28,7 @@ public void initialize() {
     super.initialize();
 
     nativeInstallMultithreading(
-            this.getReactApplicationContext().getJavaScriptContextHolder().get(),
-            new Scheduler(getReactApplicationContext())
+            this.getReactApplicationContext().getJavaScriptContextHolder().get()
     );
   }
 }

example/src/App.tsx

@@ -78,11 +78,11 @@ const styles = StyleSheet.create({
   },
   input: {
     width: '50%',
-    height: 30,
     marginVertical: 10,
     borderWidth: StyleSheet.hairlineWidth,
     borderRadius: 5,
     borderColor: 'black',
     textAlign: 'center',
+    fontSize: 14,
   },
 });