1 /* 2 * A page collection abstraction providing pages from a queue to users. 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 #include <mem/memory.h> 26 #include <fsserver/page_owner.h> 27 #include <fsserver/page_queue.h> 28 29 30 31 /* A page collection. */ 32 33 class Pages 34 { 35 protected: 36 Memory *_memory; 37 PageQueue *_queue; 38 39 virtual Flexpage *remove(); 40 41 public: 42 explicit Pages(Memory *memory, PageQueue *queue); 43 44 virtual ~Pages(); 45 46 virtual bool reserve(PageOwner *owner, Flexpage *flexpage); 47 48 virtual Flexpage *flexpage(); 49 50 virtual void queue(PageOwner *owner, Flexpage *flexpage); 51 52 virtual void release(Flexpage *flexpage); 53 }; 54 55 // vim: tabstop=4 expandtab shiftwidth=4