30ac125986
Currently, the render node is hardcoded. It works okay as long as the main device and the hardcoded node are the same. But it breaks on multi gpu setups where the render device is not /dev/dri/renderD128.
73 lines
1.3 KiB
C++
73 lines
1.3 KiB
C++
/*
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SPDX-FileCopyrightText: 2023 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#pragma once
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#include <sys/mman.h>
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#include <utility>
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namespace KWin
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{
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class MemoryMap
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{
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public:
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MemoryMap()
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: m_data(MAP_FAILED)
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, m_size(0)
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{
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}
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MemoryMap(int size, int prot, int flags, int fd, off_t offset)
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: m_data(mmap(nullptr, size, prot, flags, fd, offset))
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, m_size(size)
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{
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}
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MemoryMap(MemoryMap &&other)
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: m_data(std::exchange(other.m_data, MAP_FAILED))
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, m_size(std::exchange(other.m_size, 0))
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{
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}
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~MemoryMap()
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{
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if (m_data != MAP_FAILED) {
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munmap(m_data, m_size);
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}
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}
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MemoryMap &operator=(MemoryMap &&other)
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{
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if (m_data != MAP_FAILED) {
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munmap(m_data, m_size);
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}
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m_data = std::exchange(other.m_data, MAP_FAILED);
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m_size = std::exchange(other.m_size, 0);
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return *this;
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}
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inline bool isValid() const
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{
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return m_data != MAP_FAILED;
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}
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inline void *data() const
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{
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return m_data;
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}
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inline int size() const
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{
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return m_size;
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}
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private:
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void *m_data;
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int m_size;
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};
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} // namespace KWin
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