1 /* 2 * A memory pool allocating a region at a time from the system. 3 * 4 * Copyright (C) 2021 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 <systypes/base.h> 25 26 #include <mutex> 27 28 #include <mem/memory.h> 29 #include <mem/memory_utils.h> 30 31 32 33 /* A memory pool abstraction. */ 34 35 class MemoryIncremental : public Memory 36 { 37 protected: 38 std::mutex _lock; 39 40 unsigned int _limit; 41 offset_t _region_size; 42 bool _limited; 43 44 Region *allocate(offset_t size); 45 46 public: 47 explicit MemoryIncremental(unsigned int limit, offset_t region_size=PAGE_SIZE); 48 49 explicit MemoryIncremental(); 50 51 virtual Region *region(offset_t size); 52 53 virtual Region *region(); 54 55 virtual offset_t region_size() 56 { return _region_size; } 57 58 virtual void release(Region *region); 59 }; 60 61 // vim: tabstop=4 expandtab shiftwidth=4