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-/*
- * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
- * Copyright 1996 Silicon Graphics. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
-/*
- * Some simple primitives for allocation with explicit type information.
- * Facilities for dynamic type inference may be added later.
- * Should be used only for extremely performance critical applications,
- * or if conservative collector leakage is otherwise a problem (unlikely).
- * Note that this is implemented completely separately from the rest
- * of the collector, and is not linked in unless referenced.
- * This does not currently support GC_DEBUG in any interesting way.
- */
-/* Boehm, May 19, 1994 2:13 pm PDT */
-
-#ifndef _GC_TYPED_H
-# define _GC_TYPED_H
-# ifndef _GC_H
-# include "gc.h"
-# endif
-
-typedef GC_word * GC_bitmap;
- /* The least significant bit of the first word is one if */
- /* the first word in the object may be a pointer. */
-
-# define GC_get_bit(bm, index) \
- (((bm)[divWORDSZ(index)] >> modWORDSZ(index)) & 1)
-# define GC_set_bit(bm, index) \
- (bm)[divWORDSZ(index)] |= (word)1 << modWORDSZ(index)
-
-typedef GC_word GC_descr;
-
-GC_API GC_descr GC_make_descriptor GC_PROTO((GC_bitmap bm, size_t len));
- /* Return a type descriptor for the object whose layout */
- /* is described by the argument. */
- /* The least significant bit of the first word is one */
- /* if the first word in the object may be a pointer. */
- /* The second argument specifies the number of */
- /* meaningful bits in the bitmap. The actual object */
- /* may be larger (but not smaller). Any additional */
- /* words in the object are assumed not to contain */
- /* pointers. */
- /* Returns a conservative approximation in the */
- /* (unlikely) case of insufficient memory to build */
- /* the descriptor. Calls to GC_make_descriptor */
- /* may consume some amount of a finite resource. This */
- /* is intended to be called once per type, not once */
- /* per allocation. */
-
-GC_API GC_PTR GC_malloc_explicitly_typed
- GC_PROTO((size_t size_in_bytes, GC_descr d));
- /* Allocate an object whose layout is described by d. */
- /* The resulting object MAY NOT BE PASSED TO REALLOC. */
- /* The returned object is cleared. */
-
-GC_API GC_PTR GC_malloc_explicitly_typed_ignore_off_page
- GC_PROTO((size_t size_in_bytes, GC_descr d));
-
-GC_API GC_PTR GC_calloc_explicitly_typed
- GC_PROTO((size_t nelements,
- size_t element_size_in_bytes,
- GC_descr d));
- /* Allocate an array of nelements elements, each of the */
- /* given size, and with the given descriptor. */
- /* The elemnt size must be a multiple of the byte */
- /* alignment required for pointers. E.g. on a 32-bit */
- /* machine with 16-bit aligned pointers, size_in_bytes */
- /* must be a multiple of 2. */
- /* Returned object is cleared. */
-
-#ifdef GC_DEBUG
-# define GC_MALLOC_EXPLICTLY_TYPED(bytes, d) GC_MALLOC(bytes)
-# define GC_CALLOC_EXPLICTLY_TYPED(n, bytes, d) GC_MALLOC(n*bytes)
-#else
-# define GC_MALLOC_EXPLICTLY_TYPED(bytes, d) \
- GC_malloc_explicitly_typed(bytes, d)
-# define GC_CALLOC_EXPLICTLY_TYPED(n, bytes, d) \
- GC_calloc_explicitly_typed(n, bytes, d)
-#endif /* !GC_DEBUG */
-
-
-#endif /* _GC_TYPED_H */
-