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AK: Add a Ptr32 type to handle fixed sized pointers

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This will be used to fix the UHCI Controller, which relies on
the pointer-size being 32-bit
This commit is contained in:
Hendiadyoin1 2021-03-07 14:30:41 +01:00 committed by Andreas Kling
parent 226e063207
commit 7ba3c22931
Notes: sideshowbarker 2024-07-18 21:13:24 +09:00 
Author: https://github.com/Hendiadyoin1
Commit: https://github.com/SerenityOS/serenity/commit/7ba3c229312
Pull-request: https://github.com/SerenityOS/serenity/pull/5679
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/linusg
1 changed files with 61 additions and 0 deletions
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AK/Ptr32.h Normal file
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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
* 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 <AK/Assertions.h>
namespace AK {
template<typename T>
class Ptr32 {
public:
Ptr32() = default;
Ptr32(T* ptr)
: m_ptr((u32) reinterpret_cast<uintptr_t>(ptr))
{
VERIFY((reinterpret_cast<uintptr_t>(ptr) & 0xFFFFFFFF) == m_ptr);
}
// inline T* operator*() { return (T*)m_ptr; }
// inline const T* operator*() const { return (T*)m_ptr; }
inline T* operator->()
{
VERIFY(m_ptr);
return m_ptr;
}
inline operator T*() { return (T*)static_cast<uintptr_t>(m_ptr); }
inline operator const T*() const { return (T*)static_cast<uintptr_t>(m_ptr); }
private:
u32 m_ptr { 0 };
};
}
using AK::Ptr32;