Program Listing for File PageDescriptor.hpp

↰ Return to documentation for file (umap/PageDescriptor.hpp)

//////////////////////////////////////////////////////////////////////////////
// Copyright 2017-2020 Lawrence Livermore National Security, LLC and other
// UMAP Project Developers. See the top-level LICENSE file for details.
//
// SPDX-License-Identifier: LGPL-2.1-only
//////////////////////////////////////////////////////////////////////////////
#ifndef _UMAP_PageDescriptor_HPP
#define _UMAP_PageDescriptor_HPP

#include <iostream>
#include <string>

namespace Umap {
  class RegionDescriptor;

  struct PageDescriptor {
    enum State { FREE = 0, FILLING, PRESENT, UPDATING, LEAVING };
    char*             page;
    RegionDescriptor* region;
    State             state;
    bool              dirty;
    bool              deferred;
    bool              data_present;
    int               spurious_count;

    std::string print_state( void ) const;
    void set_state_free( void );
    void set_state_filling( void );
    void set_state_updating( void );
    void set_state_present( void );
    void set_state_leaving( void );
  };

  std::ostream& operator<<(std::ostream& os, const Umap::PageDescriptor::State st);
  std::ostream& operator<<(std::ostream& os, const Umap::PageDescriptor* pd);
} // end of namespace Umap

#endif // _UMAP_PageDescriptor_HPP