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27 lines
1.0 KiB
C
27 lines
1.0 KiB
C
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/*
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* Copyright (c) 1999 by Silicon Graphics. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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/* Descriptor for allocation request. May be redefined by client. */
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typedef struct {
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GC_word bitmap; /* Bitmap describing pointer locations. */
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/* High order bit correspond to 0th */
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/* word. 2 lsbs must be 0. */
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size_t length; /* In bytes, must be multiple of word */
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/* size. Must be >0, <= 512 */
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} * GC_copy_descriptor;
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/* The collector accesses descriptors only through these two macros. */
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#define GC_SIZE_FROM_DESCRIPTOR(d) ((d) -> length)
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#define GC_BIT_MAP_FROM_DESCRIPTOR(d) ((d) -> bitmap)
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