TTY review

src/uvw/tty.hpp

@@ -16,6 +16,13 @@ namespace uvw {
 namespace details {
 
 
+struct ResetModeMemo {
+    ~ResetModeMemo() {
+        uv_tty_reset_mode();
+    }
+};
+
+
 enum class UVTTYModeT: std::underlying_type_t<uv_tty_mode_t> {
     NORMAL = UV_TTY_MODE_NORMAL,
     RAW = UV_TTY_MODE_RAW,
@@ -29,8 +36,12 @@ enum class UVTTYModeT: std::underlying_type_t<uv_tty_mode_t> {
 class TTYHandle final: public StreamHandle<TTYHandle, uv_tty_t> {
     explicit TTYHandle(std::shared_ptr<Loop> ref,
                  FileHandle desc,
-                 bool readable)
+                 bool readable,
-        : StreamHandle{std::move(ref)}, fd{desc}, rw{readable}
+                 std::shared_ptr<details::ResetModeMemo> rmm)
+        : StreamHandle{std::move(ref)},
+          memo{std::move(rmm)},
+          fd{desc},
+          rw{readable}
     { }
 
 public:
@@ -38,7 +49,10 @@ public:
 
     template<typename... Args>
     static std::shared_ptr<TTYHandle> create(Args&&... args) {
-        return std::shared_ptr<TTYHandle>{new TTYHandle{std::forward<Args>(args)...}};
+        static std::weak_ptr<details::ResetModeMemo> rmm;
+        auto ptr = rmm.lock();
+        if(!ptr) { rmm = ptr = std::make_shared<details::ResetModeMemo>(); }
+        return std::shared_ptr<TTYHandle>{new TTYHandle{std::forward<Args>(args)..., ptr}};
     }
 
     bool init() { return initialize<uv_tty_t>(&uv_tty_init, fd, rw); }
@@ -50,7 +64,7 @@ public:
         }, get<uv_tty_t>(), static_cast<std::underlying_type_t<Mode>>(m));
     }
 
-    void reset() { invoke(&uv_tty_reset_mode); }
+    void reset() noexcept { invoke(&uv_tty_reset_mode); }
 
     WinSize getWinSize() {
         std::pair<int, int> size{0, 0};
@@ -70,6 +84,7 @@ public:
     }
 
 private:
+    std::shared_ptr<details::ResetModeMemo> memo;
     FileHandle::Type fd;
     int rw;
 };