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

src/mbgl/platform/settings.cpp

@@ -0,0 +1,58 @@
+#include <mbgl/platform/settings.hpp>
+
+#include <mutex>
+
+namespace mbgl {
+namespace platform {
+
+namespace {
+mapbox::base::Value getValue(const std::string& key, const mapbox::base::ValueObject& object) {
+    auto it = object.find(key);
+    if (it != object.end()) {
+        return it->second;
+    }
+    return {};
+}
+} // namespace
+
+class Settings::Impl {
+public:
+    mapbox::base::ValueObject settings;
+    std::mutex mutex;
+};
+
+Settings::Settings() : impl(std::make_unique<Impl>()) {}
+
+Settings& Settings::getInstance() noexcept {
+    static Settings instance;
+    return instance;
+}
+
+void Settings::set(const std::string& key, mapbox::base::Value value) noexcept {
+    std::lock_guard<std::mutex> lock(impl->mutex);
+    impl->settings[key] = std::move(value);
+}
+
+void Settings::set(const mapbox::base::ValueObject& values) noexcept {
+    std::lock_guard<std::mutex> lock(impl->mutex);
+    for (const auto& pair : values) {
+        impl->settings[pair.first] = pair.second;
+    }
+}
+
+mapbox::base::ValueObject Settings::get(const std::vector<std::string>& keys) const noexcept {
+    std::lock_guard<std::mutex> lock(impl->mutex);
+    mapbox::base::ValueObject result;
+    for (const auto& key : keys) {
+        result[key] = getValue(key, impl->settings);
+    }
+    return result;
+}
+
+mapbox::base::Value Settings::get(const std::string& key) const noexcept {
+    std::lock_guard<std::mutex> lock(impl->mutex);
+    return getValue(key, impl->settings);
+}
+
+} // namespace platform
+} // namespace mbgl