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https://github.com/SerenityOS/serenity
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c2a900b853
These instances were detected by searching for files that include AK/StdLibExtras.h, but don't match the regex: \\b(abs|AK_REPLACED_STD_NAMESPACE|array_size|ceil_div|clamp|exchange|for ward|is_constant_evaluated|is_power_of_two|max|min|mix|move|_RawPtr|RawP tr|round_up_to_power_of_two|swap|to_underlying)\\b (Without the linebreaks.) This regex is pessimistic, so there might be more files that don't actually use any "extra stdlib" functions. In theory, one might use LibCPP to detect things like this automatically, but let's do this one step after another.
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Assertions.h>
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#include <AK/Types.h>
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#ifdef KERNEL
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# include <Kernel/VirtualAddress.h>
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#endif
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namespace AK {
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template<typename T>
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concept PointerTypeName = IsPointer<T>;
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template<PointerTypeName T>
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class Userspace {
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public:
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Userspace() = default;
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// Disable default implementations that would use surprising integer promotion.
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bool operator==(Userspace const&) const = delete;
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bool operator<=(Userspace const&) const = delete;
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bool operator>=(Userspace const&) const = delete;
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bool operator<(Userspace const&) const = delete;
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bool operator>(Userspace const&) const = delete;
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#ifdef KERNEL
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Userspace(FlatPtr ptr)
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: m_ptr(ptr)
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{
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}
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explicit operator bool() const { return m_ptr != 0; }
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FlatPtr ptr() const { return m_ptr; }
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VirtualAddress vaddr() const { return VirtualAddress(m_ptr); }
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T unsafe_userspace_ptr() const { return reinterpret_cast<T>(m_ptr); }
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#else
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Userspace(T ptr)
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: m_ptr(ptr)
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{
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}
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explicit operator bool() const { return m_ptr != nullptr; }
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T ptr() const { return m_ptr; }
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#endif
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private:
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#ifdef KERNEL
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FlatPtr m_ptr { 0 };
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#else
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T m_ptr { nullptr };
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#endif
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};
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template<typename T, typename U>
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inline Userspace<T> static_ptr_cast(Userspace<U> const& ptr)
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{
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#ifdef KERNEL
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auto casted_ptr = static_cast<T>(ptr.unsafe_userspace_ptr());
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#else
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auto casted_ptr = static_cast<T>(ptr.ptr());
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#endif
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return Userspace<T>((FlatPtr)casted_ptr);
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}
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}
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#if USING_AK_GLOBALLY
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using AK::static_ptr_cast;
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using AK::Userspace;
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#endif
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