[general] moving ios and android project under ./platform folder

platform/darwin/src/timer.cpp

@@ -0,0 +1,60 @@
+#include <mbgl/util/timer.hpp>
+
+#include <CoreFoundation/CoreFoundation.h>
+
+namespace mbgl {
+namespace util {
+
+CFTimeInterval toCFTimeInterval(Duration duration) {
+    return std::chrono::duration<CFTimeInterval>(duration).count();
+}
+
+CFAbsoluteTime toCFAbsoluteTime(Duration duration) {
+    return CFAbsoluteTimeGetCurrent() + toCFTimeInterval(duration);
+}
+
+class Timer::Impl {
+public:
+    Impl(Duration timeout, Duration repeat, std::function<void()>&& fn)
+        : task(std::move(fn)),
+          loop(CFRunLoopGetCurrent()) {
+        CFRunLoopTimerContext context = {
+            0,
+            this,
+            nullptr,
+            nullptr,
+            nullptr
+        };
+        timer = CFRunLoopTimerCreate(kCFAllocatorDefault, toCFAbsoluteTime(timeout), toCFTimeInterval(repeat), 0, 0, perform, &context);
+        CFRunLoopAddTimer(loop, timer, kCFRunLoopDefaultMode);
+    }
+
+    ~Impl() {
+        CFRunLoopRemoveTimer(loop, timer, kCFRunLoopDefaultMode);
+        CFRelease(timer);
+    }
+
+private:
+    static void perform(CFRunLoopTimerRef, void* info) {
+        reinterpret_cast<Impl*>(info)->task();
+    }
+
+    std::function<void()> task;
+
+    CFRunLoopRef loop;
+    CFRunLoopTimerRef timer;
+};
+
+Timer::Timer() = default;
+Timer::~Timer() = default;
+
+void Timer::start(Duration timeout, Duration repeat, std::function<void()>&& cb) {
+    impl = std::make_unique<Impl>(timeout, repeat, std::move(cb));
+}
+
+void Timer::stop() {
+    impl.reset();
+}
+
+} // namespace util
+} // namespace mbgl