[core] [node] pass thread pool impl to Map constructor

Updates mbgl::Map constructor usage everywhere

Adds NodeThreadPool implementation using AsyncQueue to call
Nan::AsyncQueueWorker from main thread

2 files changed, 30 insertions, 2 deletions

diff --git a/include/mbgl/map/map.hpp b/include/mbgl/map/map.hpp
index 914c2cd0b3..2831206d54 100644
--- a/include/mbgl/map/map.hpp
+++ b/include/mbgl/map/map.hpp
@@ -19,8 +19,9 @@
 
 namespace mbgl {
 
-class FileSource;
 class View;
+class FileSource;
+class Scheduler;
 class SpriteImage;
 struct CameraOptions;
 struct AnimationOptions;
@@ -32,7 +33,7 @@ class Layer;
 
 class Map : private util::noncopyable {
 public:
-    explicit Map(View&, FileSource&,
+    explicit Map(View&, FileSource&, Scheduler&,
                  MapMode mapMode = MapMode::Continuous,
                  GLContextMode contextMode = GLContextMode::Unique,
                  ConstrainMode constrainMode = ConstrainMode::HeightOnly,
diff --git a/include/mbgl/platform/default/thread_pool.hpp b/include/mbgl/platform/default/thread_pool.hpp
new file mode 100644
index 0000000000..a14d16d771
--- /dev/null
+++ b/include/mbgl/platform/default/thread_pool.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <mbgl/actor/scheduler.hpp>
+
+#include <condition_variable>
+#include <mutex>
+#include <queue>
+#include <thread>
+
+namespace mbgl {
+
+class ThreadPool : public Scheduler {
+public:
+    ThreadPool(std::size_t count);
+    ~ThreadPool() override;
+
+    void schedule(std::weak_ptr<Mailbox>) override;
+
+private:
+    std::vector<std::thread> threads;
+    std::queue<std::weak_ptr<Mailbox>> queue;
+    std::mutex mutex;
+    std::condition_variable cv;
+    bool terminate { false };
+};
+
+} // namespace mbgl