mirror of
https://github.com/ptitSeb/Serious-Engine
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65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
/* Copyright (c) 2002-2012 Croteam Ltd.
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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 version 2 of the GNU General Public License as published by
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the Free Software Foundation
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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
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#ifndef SE_INCL_LINEARALLOCATOR_H
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#define SE_INCL_LINEARALLOCATOR_H
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#ifdef PRAGMA_ONCE
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#pragma once
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#endif
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/*
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* Template class for dynamic allocation of objects in a linear fashion.
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*/
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template<class Type>
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class CLinearAllocator {
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// implementation:
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public:
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CListHead la_lhBlocks; // list of allocated memory blocks
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INDEX la_ctAllocationStep; // number of objects allocated
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INDEX la_ctObjects; // number of objects allocated
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INDEX la_ctFree; // number of free objects in current block
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Type *la_ptNextFree; // pointer to next free object
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// allocate a new memory block
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void AllocBlock(INDEX iCount);
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// interface:
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public:
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// default constructor
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CLinearAllocator(void);
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// copy constructor
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CLinearAllocator(CLinearAllocator<Type> &laOriginal);
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// destructor -- frees all memory
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~CLinearAllocator(void);
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// destroy all objects, and reset the allocator to initial (empty) state
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void Clear(void);
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/* Set how many elements to allocate when stack overflows. */
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inline void SetAllocationStep(INDEX ctStep);
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// allocate a new object
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inline Type &New(void);
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inline Type *New(INDEX ct);
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// free all objects but keep allocated space and relinearize it
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inline void Reset(void);
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// these are just for compatibility with CDynamicStackArray<>:
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inline Type &Push(void) { return New(); };
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inline Type *Push(INDEX ct) { return New(ct); };
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inline void PopAll(void) { Reset(); };
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};
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#endif /* include-once check. */
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