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/* |
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* Copyright © 2005 William Pitcock, et al. |
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* Rights to this code are as documented in doc/pod/license.pod. |
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* |
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* Data structures for the block allocator. |
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* |
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* $Id: balloc.h,v 1.2 2007-07-21 01:29:07 pippijn Exp $ |
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*/ |
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|
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#ifndef BALLOC_H |
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#define BALLOC_H |
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|
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struct Block |
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{ |
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size_t alloc_size; |
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struct Block *next; /* Next in our chain of blocks */ |
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void *elems; /* Points to allocated memory */ |
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list_t free_list; |
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list_t used_list; |
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}; |
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|
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struct MemBlock |
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{ |
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#ifdef DEBUG_BALLOC |
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unsigned long magic; |
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#endif |
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node_t self; |
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Block *block; /* Which block we belong to */ |
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}; |
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|
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/* information for the root node of the heap */ |
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struct BlockHeap |
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{ |
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node_t hlist; |
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size_t elemSize; /* Size of each element to be stored */ |
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unsigned long elemsPerBlock; /* Number of elements per block */ |
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unsigned long blocksAllocated; /* Number of blocks allocated */ |
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unsigned long freeElems; /* Number of free elements */ |
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Block *base; /* Pointer to first block */ |
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}; |
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|
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E int BlockHeapFree (BlockHeap *bh, void *ptr); |
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E void *BlockHeapAlloc (BlockHeap *bh); |
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|
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E BlockHeap *BlockHeapCreate (size_t elemsize, int elemsperblock); |
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E int BlockHeapDestroy (BlockHeap *bh); |
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|
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E void initBlockHeap (void); |
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E void BlockHeapUsage (BlockHeap *bh, size_t * bused, size_t * bfree, size_t * bmemusage); |
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|
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#endif |
