1 /* 2 * A generic page mapper providing memory pages to satisfy file accesses. 3 * 4 * Copyright (C) 2021, 2022 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <mem/flexpage.h> 25 26 27 28 /* A generic file mapper interface, accessed by the pager, associating flexpages 29 with file regions. */ 30 31 class GenericPageMapper 32 { 33 public: 34 virtual ~GenericPageMapper(); 35 36 virtual Flexpage *get(offset_t offset, map_flags_t flags); 37 38 virtual void queue(Flexpage *flexpage); 39 40 virtual void flush_all(offset_t start, offset_t size); 41 42 virtual offset_t get_data_size(); 43 44 virtual void set_data_size(offset_t size); 45 }; 46 47 // vim: tabstop=4 expandtab shiftwidth=4