[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

1 files changed, 27 insertions, 0 deletions

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