1 files changed, 28 insertions, 6 deletions
diff --git a/src/style/class_dictionary.cpp b/src/style/class_dictionary.cpp
index 6e1eb5a879..ba7c0d55be 100644
--- a/src/style/class_dictionary.cpp
+++ b/src/style/class_dictionary.cpp
@@ -1,8 +1,34 @@
 #include <mbgl/style/class_dictionary.hpp>
 
+#include <uv.h>
+
 namespace mbgl {
 
-ClassID ClassDictionary::Lookup(const std::string &class_name) {
+ClassDictionary::ClassDictionary() {}
+
+ClassDictionary &ClassDictionary::Get() {
+    // Note: We should eventually switch to uv_key_* functions, but libuv 0.10 doesn't have these
+    // yet. Instead, we're using the pthread functions directly for now.
+    static pthread_once_t store_once = PTHREAD_ONCE_INIT;
+    static pthread_key_t store_key;
+
+    // Create the key.
+    pthread_once(&store_once, []() {
+        pthread_key_create(&store_key, [](void *ptr) {
+            delete reinterpret_cast<ClassDictionary *>(ptr);
+        });
+    });
+
+    ClassDictionary *ptr = reinterpret_cast<ClassDictionary *>(pthread_getspecific(store_key));
+    if (ptr == nullptr) {
+        ptr = new ClassDictionary();
+        pthread_setspecific(store_key, ptr);
+    }
+
+    return *ptr;
+}
+
+ClassID ClassDictionary::lookup(const std::string &class_name) {
     auto it = store.find(class_name);
     if (it == store.end()) {
         // Insert the class name into the store.
@@ -14,7 +40,7 @@ ClassID ClassDictionary::Lookup(const std::string &class_name) {
     }
 }
 
-ClassID ClassDictionary::Normalize(ClassID id) {
+ClassID ClassDictionary::normalize(ClassID id) {
     if (id >= ClassID::Named) {
         return ClassID::Named;
     } else {
@@ -22,8 +48,4 @@ ClassID ClassDictionary::Normalize(ClassID id) {
     }
 }
 
-
-std::unordered_map<std::string, ClassID> ClassDictionary::store = { { "", ClassID::Default } };
-uint32_t ClassDictionary::offset = 0;
-
 }