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Diffstat (limited to 'backends/plugins/elf/memory-manager.h')
-rw-r--r-- | backends/plugins/elf/memory-manager.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/backends/plugins/elf/memory-manager.h b/backends/plugins/elf/memory-manager.h new file mode 100644 index 0000000000..5121ed163d --- /dev/null +++ b/backends/plugins/elf/memory-manager.h @@ -0,0 +1,83 @@ +/* ScummVM - Graphic Adventure Engine + * + * ScummVM is the legal property of its developers, whose names + * are too numerous to list here. Please refer to the COPYRIGHT + * file distributed with this source distribution. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * $URL$ + * $Id$ + * + */ + +#ifndef ELF_MEMORY_MANAGER_H +#define ELF_MEMORY_MANAGER_H + +#include "common/singleton.h" +#include "common/list.h" +#include "common/mutex.h" + +/** + * A 'foolproof' way to prevent memory fragmentation. This class is used to + * serve as a permanent allocation to prevent the process of loading and + * unloading plugins from causing heavy fragmentation. + **/ + +#define ELFMemMan ELFMemoryManager::instance() + +class ELFMemoryManager : public Common::Singleton<ELFMemoryManager> { +public: + void trackPlugin(bool value); + void trackAlloc(size_t align, size_t size); + + void allocateHeap(); + + void *pluginAllocate(size_t size); + void *pluginAllocate(uint32 align, uint32 size); + void pluginDeallocate(void *ptr); + +private: + friend class Common::Singleton<ELFMemoryManager>; + + ELFMemoryManager(); + ~ELFMemoryManager(); + + void *allocateOnHeap(size_t align, size_t size); + void deallocateFromHeap(void *ptr); + + struct Allocation { + byte *start; + size_t size; + byte *end() { return start + size; } + Allocation(byte *a, size_t b) : start(a), size(b) {} + }; + + // heap + void *_heap; + size_t _heapAlign; // alignment of the heap + size_t _heapSize; // size of the heap + + // tracking allocations + bool _trackAllocs; // whether we are currently tracking + size_t _measuredSize; + size_t _measuredAlign; + + // real allocations + Common::List<Allocation> _allocList; + uint32 _bytesAllocated; +}; + +#endif /* ELF_MEMORY_MANAGER_H */ |