text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   * 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/RefCounted.h>
  #include <AK/RefPtr.h>
  
  namespace AK {
  
  class SharedBuffer : public RefCounted<SharedBuffer> {
  public:
      static RefPtr<SharedBuffer> create_with_size(int);
      static RefPtr<SharedBuffer> create_from_shared_buffer_id(int);
      ~SharedBuffer();
  
      bool share_globally();
      bool share_with(pid_t);
      int shared_buffer_id() const { return m_shared_buffer_id; }
      void seal();
      int size() const { return m_size; }
      void* data() { return m_data; }
      const void* data() const { return m_data; }
      void set_volatile();
      [[nodiscard]] bool set_nonvolatile();
  
  private:
      SharedBuffer(int shared_buffer_id, int size, void*);
  
      int m_shared_buffer_id { -1 };
      int m_size { 0 };
      void* m_data;
  };
  
  }
  
  using AK::SharedBuffer;
  