1 files changed, 70 insertions, 0 deletions
diff --git a/include/gpg/GpgFunctionObject.h b/include/gpg/GpgFunctionObject.h
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+++ b/include/gpg/GpgFunctionObject.h
@@ -0,0 +1,70 @@
+/**
+ * This file is part of GPGFrontend.
+ *
+ * GPGFrontend is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Foobar is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Foobar.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from gpg4usb-team.
+ * Their source code version also complies with GNU General Public License.
+ *
+ * The source code version of this software was modified and released
+ * by Saturneric<[email protected]> starting on May 12, 2021.
+ *
+ */
+
+#ifndef GPGFRONTEND_ZH_CN_TS_FUNCTIONOBJECT_H
+#define GPGFRONTEND_ZH_CN_TS_FUNCTIONOBJECT_H
+
+#include "GpgFrontend.h"
+
+namespace GpgFrontend {
+    template<typename T>
+    class SingletonFunctionObject {
+    public:
+
+        static T &getInstance()  {
+            std::lock_guard<std::mutex> guard(_instance_mutex);
+            if(_instance == nullptr) _instance = std::make_unique<T>();
+            return *_instance;
+        }
+
+        SingletonFunctionObject(T&&) = delete;
+
+        SingletonFunctionObject(const T&) = delete;
+
+        void operator= (const T&) = delete;
+
+    protected:
+
+        SingletonFunctionObject() = default;
+
+        virtual ~SingletonFunctionObject() = default;
+
+    private:
+
+        static std::mutex _instance_mutex;
+        static std::unique_ptr<T> _instance;
+    };
+
+    template<typename T>
+    std::mutex SingletonFunctionObject<T>::_instance_mutex;
+
+    template<typename T>
+    std::unique_ptr<T> SingletonFunctionObject<T>::_instance = nullptr;
+
+}
+
+
+
+
+#endif //GPGFRONTEND_ZH_CN_TS_FUNCTIONOBJECT_H