Move JNI bindings code from mapbox-gl-native to this repo. (#301)

MapboxGLAndroidSDK/src/cpp/map_renderer_runnable.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#include <mbgl/actor/mailbox.hpp>
+#include <mbgl/actor/scheduler.hpp>
+
+#include <memory>
+#include <utility>
+
+#include <jni/jni.hpp>
+
+namespace mbgl {
+namespace android {
+
+/**
+ * The MapRendererRunnable is a peer class that encapsulates
+ * a scheduled mailbox in a Java Runnable so it can be
+ * scheduled on the map renderer thread.
+ *
+ */
+class MapRendererRunnable {
+public:
+
+    static constexpr auto Name() { return "com/mapbox/mapboxsdk/maps/renderer/MapRendererRunnable"; };
+
+    static void registerNative(jni::JNIEnv&);
+
+    MapRendererRunnable(jni::JNIEnv&, std::function<void()>);
+
+    // Only for jni registration, unused
+    MapRendererRunnable(jni::JNIEnv&) {
+        assert(false);
+    }
+
+    ~MapRendererRunnable();
+
+    void run(jni::JNIEnv&);
+
+    // Transfers ownership of the Peer object to the caller
+    jni::Global<jni::Object<MapRendererRunnable>> peer();
+
+private:
+    jni::Global<jni::Object<MapRendererRunnable>> javaPeer;
+    std::function<void()> function;
+};
+
+} // namespace android
+} // namespace mbgl