mirror of
https://github.com/libretro/scummvm.git
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86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef ELF_MEMORY_MANAGER_H
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#define ELF_MEMORY_MANAGER_H
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#include "common/scummsys.h"
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#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
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#include "common/singleton.h"
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#include "common/list.h"
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#include "common/mutex.h"
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/**
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* A 'foolproof' way to prevent memory fragmentation. This class is used to
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* serve as a permanent allocation to prevent the process of loading and
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* unloading plugins from causing heavy fragmentation.
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**/
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#define ELFMemMan ELFMemoryManager::instance()
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class ELFMemoryManager : public Common::Singleton<ELFMemoryManager> {
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public:
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void trackPlugin(bool value);
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void trackAlloc(uint32 align, uint32 size);
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void allocateHeap();
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void *pluginAllocate(uint32 size);
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void *pluginAllocate(uint32 align, uint32 size);
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void pluginDeallocate(void *ptr);
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private:
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friend class Common::Singleton<ELFMemoryManager>;
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ELFMemoryManager();
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~ELFMemoryManager();
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void *allocateOnHeap(uint32 align, uint32 size);
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void deallocateFromHeap(void *ptr);
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struct Allocation {
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byte *start;
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uint32 size;
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byte *end() { return start + size; }
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Allocation(byte *a, uint32 b) : start(a), size(b) {}
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};
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// heap
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void *_heap;
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uint32 _heapAlign; // alignment of the heap
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uint32 _heapSize; // size of the heap
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// tracking allocations
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bool _trackAllocs; // whether we are currently tracking
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uint32 _measuredSize;
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uint32 _measuredAlign;
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// real allocations
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Common::List<Allocation> _allocList;
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uint32 _bytesAllocated;
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};
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#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) */
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#endif /* ELF_MEMORY_MANAGER_H */
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