mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 08:03:41 +08:00
104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/*
|
|
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
|
|
* Copyright (c) 1991-1995 by Xerox Corporation. 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.
|
|
*/
|
|
/* Boehm, October 3, 1995 2:07 pm PDT */
|
|
|
|
# ifndef GC_PRIVATE_H
|
|
# include "private/gc_priv.h"
|
|
# endif
|
|
|
|
/* USE OF THIS FILE IS NOT RECOMMENDED unless the collector has been */
|
|
/* compiled without -DALL_INTERIOR_POINTERS or with */
|
|
/* -DDONT_ADD_BYTE_AT_END, or the specified size includes a pointerfree */
|
|
/* word at the end. In the standard collector configuration, */
|
|
/* the final word of each object may not be scanned. */
|
|
/* This is most useful for compilers that generate C. */
|
|
/* Manual use is hereby discouraged. */
|
|
|
|
/* Allocate n words (NOT BYTES). X is made to point to the result. */
|
|
/* It is assumed that n < MAXOBJSZ, and */
|
|
/* that n > 0. On machines requiring double word alignment of some */
|
|
/* data, we also assume that n is 1 or even. This bypasses the */
|
|
/* MERGE_SIZES mechanism. In order to minimize the number of distinct */
|
|
/* free lists that are maintained, the caller should ensure that a */
|
|
/* small number of distinct values of n are used. (The MERGE_SIZES */
|
|
/* mechanism normally does this by ensuring that only the leading three */
|
|
/* bits of n may be nonzero. See misc.c for details.) We really */
|
|
/* recommend this only in cases in which n is a constant, and no */
|
|
/* locking is required. */
|
|
/* In that case it may allow the compiler to perform substantial */
|
|
/* additional optimizations. */
|
|
# define GC_MALLOC_WORDS(result,n) \
|
|
{ \
|
|
register ptr_t op; \
|
|
register ptr_t *opp; \
|
|
DCL_LOCK_STATE; \
|
|
\
|
|
opp = &(GC_objfreelist[n]); \
|
|
FASTLOCK(); \
|
|
if( !FASTLOCK_SUCCEEDED() || (op = *opp) == 0 ) { \
|
|
FASTUNLOCK(); \
|
|
(result) = GC_generic_malloc_words_small((n), NORMAL); \
|
|
} else { \
|
|
*opp = obj_link(op); \
|
|
obj_link(op) = 0; \
|
|
GC_words_allocd += (n); \
|
|
FASTUNLOCK(); \
|
|
(result) = (GC_PTR) op; \
|
|
} \
|
|
}
|
|
|
|
|
|
/* The same for atomic objects: */
|
|
# define GC_MALLOC_ATOMIC_WORDS(result,n) \
|
|
{ \
|
|
register ptr_t op; \
|
|
register ptr_t *opp; \
|
|
DCL_LOCK_STATE; \
|
|
\
|
|
opp = &(GC_aobjfreelist[n]); \
|
|
FASTLOCK(); \
|
|
if( !FASTLOCK_SUCCEEDED() || (op = *opp) == 0 ) { \
|
|
FASTUNLOCK(); \
|
|
(result) = GC_generic_malloc_words_small((n), PTRFREE); \
|
|
} else { \
|
|
*opp = obj_link(op); \
|
|
obj_link(op) = 0; \
|
|
GC_words_allocd += (n); \
|
|
FASTUNLOCK(); \
|
|
(result) = (GC_PTR) op; \
|
|
} \
|
|
}
|
|
|
|
/* And once more for two word initialized objects: */
|
|
# define GC_CONS(result, first, second) \
|
|
{ \
|
|
register ptr_t op; \
|
|
register ptr_t *opp; \
|
|
DCL_LOCK_STATE; \
|
|
\
|
|
opp = &(GC_objfreelist[2]); \
|
|
FASTLOCK(); \
|
|
if( !FASTLOCK_SUCCEEDED() || (op = *opp) == 0 ) { \
|
|
FASTUNLOCK(); \
|
|
op = GC_generic_malloc_words_small(2, NORMAL); \
|
|
} else { \
|
|
*opp = obj_link(op); \
|
|
GC_words_allocd += 2; \
|
|
FASTUNLOCK(); \
|
|
} \
|
|
((word *)op)[0] = (word)(first); \
|
|
((word *)op)[1] = (word)(second); \
|
|
(result) = (GC_PTR) op; \
|
|
}
|