Update Nemirtingas overlay to latest.

overlay_experimental/System/Library.h

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) Nemirtingas
+ * This file is part of System.
+ *
+ * System is free software; you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * System 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with System; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <string>
+
+namespace System {
+
+namespace Library {
+
+class Library
+{
+    class LibraryImpl* _Impl;
+
+public:
+    Library();
+
+    Library(Library const& other);
+
+    Library(Library&& other) noexcept;
+
+    Library& operator=(Library const& other);
+
+    Library& operator=(Library&& other) noexcept;
+
+    ~Library();
+
+    bool OpenLibrary(std::string const& library_name, bool append_extension);
+
+    void CloseLibrary();
+
+    void* GetVSymbol(std::string const& symbol_name) const;
+
+    template<typename T>
+    inline T* GetSymbol(std::string const& symbol_name) const
+    {
+        return reinterpret_cast<T*>(GetVSymbol(symbol_name));
+    }
+
+    std::string GetLibraryPath() const;
+
+    void* GetLibraryNativeHandle() const;
+
+    bool IsLoaded() const;
+};
+
+// Triies to load the library, I suggest that you use a Library instance instead
+void* OpenLibrary(const char* library_name);
+// Will decrease the OS' ref counter on the library, use it to close a handle opened by open_library.
+// A Library instance will automatically call this in the destructor
+void  CloseLibrary(void* handle);
+// Will try to retrieve a symbol address from the library handle
+void* GetSymbol(void* handle, const char* symbol_name);
+// Get a pointer to the library, if it is not loaded, will return nullptr. This doesn't increment the OS' internal ref counter
+void* GetLibraryHandle(const char* library_name);
+// Get the library path of a module handle
+std::string GetLibraryPath(void* handle);
+// Get the native extension representing a shared library.
+std::string GetLibraryExtension();
+
+}
+
+}