[android] self-contained map renderer

- Isolates the GL thread in a MapRenderer class with a native peer

1 files changed, 50 insertions, 0 deletions

diff --git a/platform/android/src/map_renderer_runnable.hpp b/platform/android/src/map_renderer_runnable.hpp
new file mode 100644
index 0000000000..75646a442d
--- /dev/null
+++ b/platform/android/src/map_renderer_runnable.hpp
@@ -0,0 +1,50 @@
+#pragma once
+
+#include <mbgl/actor/mailbox.hpp>
+#include <mbgl/actor/scheduler.hpp>
+
+#include <memory>
+#include <utility>
+
+#include <jni/jni.hpp>
+
+#include "jni/generic_global_ref_deleter.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 jni::Class<MapRendererRunnable> javaClass;
+
+    static void registerNative(jni::JNIEnv&);
+
+    MapRendererRunnable(jni::JNIEnv&, std::weak_ptr<Mailbox>);
+
+    // Only for jni registration, unused
+    MapRendererRunnable(jni::JNIEnv&) {
+        assert(false);
+    }
+
+    ~MapRendererRunnable();
+
+    void run(jni::JNIEnv&);
+
+    jni::Object<MapRendererRunnable> getPeer();
+
+private:
+    GenericUniqueWeakObject<MapRendererRunnable> javaPeer;
+    std::weak_ptr<Mailbox> mailbox;
+};
+
+} // namespace android
+} // namespace mbgl