rewrite storage layer to be independent of the Map's event loop

1 files changed, 39 insertions, 0 deletions

diff --git a/include/mbgl/storage/resource.hpp b/include/mbgl/storage/resource.hpp
new file mode 100644
index 0000000000..e499f84a28
--- /dev/null
+++ b/include/mbgl/storage/resource.hpp
@@ -0,0 +1,39 @@
+#ifndef MBGL_STORAGE_RESOURCE
+#define MBGL_STORAGE_RESOURCE
+
+#include <string>
+#include <functional>
+
+namespace mbgl {
+
+struct Resource {
+    enum Kind : uint8_t {
+        Unknown = 0,
+        Tile = 1,
+        Glyphs = 2,
+        Image = 3,
+        JSON = 4,
+    };
+
+    const Kind kind;
+    const std::string url;
+
+    inline bool operator==(const Resource &res) const {
+        return kind == res.kind && url == res.url;
+    }
+};
+
+}
+
+// Specialize std::hash for use in std::unordered_map
+namespace std {
+
+template<> struct hash<mbgl::Resource> {
+    std::size_t operator()(mbgl::Resource const& r) const {
+        return std::hash<std::string>()(r.url) ^ (std::hash<uint8_t>()(r.kind) << 1);
+    }
+};
+
+}
+
+#endif