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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2007-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#ifndef __ERL_GC_H__
#define __ERL_GC_H__
#include "erl_map.h"
/* GC declarations shared by beam/erl_gc.c and hipe/hipe_gc.c */
#if defined(DEBUG) && !ERTS_GLB_INLINE_INCL_FUNC_DEF
# define HARDDEBUG 1
#endif
#define IS_MOVED_BOXED(x) (!is_header((x)))
#define IS_MOVED_CONS(x) (is_non_value((x)))
#define MOVE_CONS(PTR,CAR,HTOP,ORIG) \
do { \
Eterm gval; \
\
HTOP[0] = CAR; /* copy car */ \
HTOP[1] = PTR[1]; /* copy cdr */ \
gval = make_list(HTOP); /* new location */ \
*ORIG = gval; /* redirect original reference */ \
PTR[0] = THE_NON_VALUE; /* store forwarding indicator */ \
PTR[1] = gval; /* store forwarding address */ \
HTOP += 2; /* update tospace htop */ \
} while(0)
#define MOVE_BOXED(PTR,HDR,HTOP,ORIG) \
do { \
Eterm gval; \
Sint nelts; \
\
ASSERT(is_header(HDR)); \
nelts = header_arity(HDR); \
switch ((HDR) & _HEADER_SUBTAG_MASK) { \
case SUB_BINARY_SUBTAG: nelts++; break; \
case MAP_SUBTAG: nelts+=map_get_size(PTR) + 1; break; \
case FUN_SUBTAG: nelts+=((ErlFunThing*)(PTR))->num_free+1; break; \
} \
gval = make_boxed(HTOP); \
*ORIG = gval; \
*HTOP++ = HDR; \
*PTR++ = gval; \
while (nelts--) *HTOP++ = *PTR++; \
\
} while(0)
#define in_area(ptr,start,nbytes) \
((UWord)((char*)(ptr) - (char*)(start)) < (nbytes))
extern Uint erts_test_long_gc_sleep;
#if defined(DEBUG) || defined(ERTS_OFFHEAP_DEBUG)
int within(Eterm *ptr, Process *p);
#endif
ERTS_GLB_INLINE Eterm follow_moved(Eterm term);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE Eterm follow_moved(Eterm term)
{
Eterm* ptr;
switch (primary_tag(term)) {
case TAG_PRIMARY_IMMED1:
break;
case TAG_PRIMARY_BOXED:
ptr = boxed_val(term);
if (IS_MOVED_BOXED(*ptr)) term = *ptr;
break;
case TAG_PRIMARY_LIST:
ptr = list_val(term);
if (IS_MOVED_CONS(ptr[0])) term = ptr[1];
break;
default:
ASSERT(!"strange tag in follow_moved");
}
return term;
}
#endif
#endif /* __ERL_GC_H__ */
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