1 files changed, 105 insertions, 0 deletions
diff --git a/src/xcb_resource.hh b/src/xcb_resource.hh
new file mode 100644
index 0000000..15619e5
--- /dev/null
+++ b/src/xcb_resource.hh
@@ -0,0 +1,105 @@
+#ifndef XCB_RESOURCE_HH
+#define XCB_RESOURCE_HH
+
+#include "xcb_connection.hh"
+
+#include <memory>
+#include <xcb/xproto.h>
+
+namespace xcb {
+
+namespace internal {
+
+struct WndDeleter {
+  void operator() (xcb_connection_t* conn, xcb_window_t wnd) const {
+    xcb_destroy_window(conn, wnd);
+  }
+};
+
+struct GCDeleter {
+  void operator() (xcb_connection_t* conn, xcb_gcontext_t gc) const {
+    xcb_free_gc(conn, gc);
+  }
+};
+
+struct FontDeleter {
+  void operator() (xcb_connection_t* conn, xcb_font_t font) const {
+    xcb_close_font(conn, font);
+  }
+};
+
+}  // namespace internal
+
+template<typename T, typename Deleter>
+class xcb_resource {
+public:
+  explicit xcb_resource(shared_conn conn)
+    : conn_(conn), id_(xcb_generate_id(conn_.get())) {}
+  constexpr xcb_resource()
+    : id_(XCB_NONE) {}
+  xcb_resource(xcb_resource const& res) = delete;
+  xcb_resource(xcb_resource&& res)
+    : conn_(res.conn_), id_(res.release()) { }
+  ~xcb_resource() {
+    reset();
+  }
+
+  xcb_resource& operator=(xcb_resource const& res) = delete;
+  xcb_resource& operator=(xcb_resource&& res) {
+    reset();
+    conn_ = res.conn_;
+    id_ = res.release();
+    return *this;
+  }
+
+  T id() const {
+    return id_;
+  }
+
+  void reset() {
+    if (id_ == XCB_NONE)
+      return;
+    deleter_(conn_.get(), id_);
+    id_ = XCB_NONE;
+  }
+
+  T release() {
+    auto ret = id_;
+    id_ = XCB_NONE;
+    conn_.reset();
+    return ret;
+  }
+
+private:
+  shared_conn conn_;
+  T id_;
+  Deleter const deleter_{};
+};
+
+typedef std::unique_ptr<xcb_resource<xcb_window_t,
+                                     internal::WndDeleter>> unique_wnd;
+typedef std::shared_ptr<xcb_resource<xcb_window_t,
+                                     internal::WndDeleter>> shared_wnd;
+
+unique_wnd make_unique_wnd(shared_conn conn);
+shared_wnd make_shared_wnd(shared_conn conn);
+
+typedef std::unique_ptr<xcb_resource<xcb_gcontext_t,
+                                     internal::GCDeleter>> unique_gc;
+typedef std::shared_ptr<xcb_resource<xcb_gcontext_t,
+                                     internal::GCDeleter>> shared_gc;
+
+unique_gc make_unique_gc(shared_conn conn);
+shared_gc make_shared_gc(shared_conn conn);
+
+typedef std::unique_ptr<xcb_resource<xcb_font_t,
+                                     internal::FontDeleter>> unique_font;
+typedef std::shared_ptr<xcb_resource<xcb_font_t,
+                                     internal::FontDeleter>> shared_font;
+
+unique_font make_unique_font(shared_conn conn);
+shared_font make_shared_font(shared_conn conn);
+
+}  // namespace xcb
+
+#endif  // XCB_RESOURCE_HH