diff --git a/AK/Userspace.h b/AK/Userspace.h new file mode 100644 index 0000000000..7d61c41625 --- /dev/null +++ b/AK/Userspace.h @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2018-2020, Andreas Kling + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#pragma once + +#include + +namespace AK { + +template +class Userspace { +public: + Userspace() { } + + operator bool() const { return m_ptr; } + operator FlatPtr() const { return (FlatPtr)m_ptr; } + +#if defined(KERNEL) + Userspace(FlatPtr ptr) + : m_ptr(ptr) + { + } + + FlatPtr ptr() const { return m_ptr; } +#else + Userspace(T ptr) + : m_ptr(ptr) + { + } + + T ptr() const { return m_ptr; } +#endif + +private: +#if defined(KERNEL) + FlatPtr m_ptr { 0 }; +#else + T m_ptr { nullptr }; +#endif +}; + +} + +using AK::Userspace;