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libdeng: Moved BlockSet to libdeng (as memoryblockset.c/h)
Made the file name more specific to avoid overloading the name Block (as in de::Block) with a new meaning.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /** | ||
| * @file memoryblockset.h | ||
| * Set of memory blocks allocated from the zone. @ingroup system | ||
| * | ||
| * @authors Copyright © 2006-2012 Jaakko Keränen <jaakko.keranen@iki.fi> | ||
| * @authors Copyright © 2006-2012 Daniel Swanson <danij@dengine.net> | ||
| * | ||
| * @par License | ||
| * GPL: http://www.gnu.org/licenses/gpl.html | ||
| * | ||
| * <small>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 St, Fifth Floor, Boston, MA | ||
| * 02110-1301 USA</small> | ||
| */ | ||
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| #ifndef LIBDENG_MEMORY_BLOCKSET_H | ||
| #define LIBDENG_MEMORY_BLOCKSET_H | ||
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| #include "libdeng.h" | ||
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| #ifdef __cplusplus | ||
| extern "C" { | ||
| #endif | ||
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| struct blockset_block_s; | ||
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| /** | ||
| * Block memory batch allocator. | ||
| * | ||
| * These are used instead of many calls to M_Malloc() when the number of | ||
| * required elements is unknown and when linear allocation would be too | ||
| * slow. | ||
| * | ||
| * Memory is allocated as needed in blocks of "batchSize" elements. When | ||
| * a new element is required we simply reserve a ptr in the previously | ||
| * allocated block of elements or create a new block just in time. | ||
| * | ||
| * The internal state of a blockset is managed automatically. | ||
| */ | ||
| typedef struct blockset_s { | ||
| /// Number of elements to allocate in each block. | ||
| size_t _elementsPerBlock; | ||
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| /// Running total of the number of used elements across all blocks. | ||
| size_t _elementsInUse; | ||
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| /// sizeof an individual element in the set. | ||
| size_t _elementSize; | ||
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| /// Number of blocks in the set. | ||
| size_t _blockCount; | ||
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| /// Vector of blocks in the set. | ||
| struct blockset_block_s* _blocks; | ||
| } blockset_t; | ||
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| /** | ||
| * Creates a new block memory allocator. | ||
| * | ||
| * @param sizeOfElement Required size of each element in bytes. Must be at | ||
| * least 1 (bytes). | ||
| * @param batchSize Number of elements in each block of the set. Must | ||
| * be at least 1. | ||
| * | ||
| * @return Ptr to the newly created blockset. | ||
| */ | ||
| DENG_PUBLIC blockset_t* BlockSet_New(size_t sizeOfElement, size_t batchSize); | ||
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| /** | ||
| * Free an entire blockset. All memory allocated is released for all elements | ||
| * in all blocks and any used for the blockset itself. | ||
| * | ||
| * @param set The blockset to be freed. | ||
| */ | ||
| DENG_PUBLIC void BlockSet_Delete(blockset_t* set); | ||
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| /** | ||
| * Return a ptr to the next unused element in the blockset. | ||
| * | ||
| * @param set The blockset to return the next element from. | ||
| * | ||
| * @return Ptr to the next unused element in the blockset. | ||
| */ | ||
| DENG_PUBLIC void* BlockSet_Allocate(blockset_t* set); | ||
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| /// @return Total number of elements from the set that are currently in use. | ||
| DENG_PUBLIC size_t BlockSet_Count(blockset_t* set); | ||
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| #ifdef __cplusplus | ||
| } // extern "C" | ||
| #endif | ||
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| #endif /* LIBDENG_BLOCKSET_H */ |
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