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8ce7df73fb
A future patch could do some MacOS specific things for set_volatile/set_nonvolatile. For now, swap out the defined(__linux__) branches for simple not __serenity__ branches.
73 lines
2.3 KiB
C++
73 lines
2.3 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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#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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