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https://github.com/SerenityOS/serenity
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7399874479
If we're sharing buffers, we only want to share trivial structures as anything else could potentially share internal pointers, which most likely is going to cause problems due to different address spaces. Fix the GUI::SystemTheme structure, which was not trivial, which is now caught at compile time. Fixes #3650
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if defined(__serenity__) || defined(__linux__)
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# include <AK/RefCounted.h>
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# include <AK/RefPtr.h>
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namespace AK {
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class SharedBuffer : public RefCounted<SharedBuffer> {
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public:
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static RefPtr<SharedBuffer> create_with_size(int);
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static RefPtr<SharedBuffer> create_from_shbuf_id(int);
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~SharedBuffer();
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bool share_globally();
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bool share_with(pid_t);
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int shbuf_id() const { return m_shbuf_id; }
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void seal();
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int size() const { return m_size; }
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template<typename T>
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T* data()
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{
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static_assert(IsVoid<T>::value || is_trivial<T>());
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return (T*)m_data;
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}
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template<typename T>
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const T* data() const
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{
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static_assert(IsVoid<T>::value || is_trivial<T>());
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return (const T*)m_data;
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}
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void set_volatile();
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[[nodiscard]] bool set_nonvolatile();
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private:
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SharedBuffer(int shbuf_id, int size, void*);
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int m_shbuf_id { -1 };
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int m_size { 0 };
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void* m_data { nullptr };
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};
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}
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using AK::SharedBuffer;
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#endif
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