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#ifndef SCM_GC_INLINE_H
#define SCM_GC_INLINE_H
/* Copyright 1995-1996,1998-2004,2006-2014,2018-2019
Free Software Foundation, Inc.
This file is part of Guile.
Guile is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Guile is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Guile. If not, see
<https://www.gnu.org/licenses/>. */
/* Much of this file was copied from gc_inline.h, from the BDW
* collector. Its copyright notice is:
*
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright 1991-1995 by Xerox Corporation. All rights reserved.
* Copyright 2005 Hewlett-Packard Development Company, L.P.
*
* 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.
*/
#include "libguile/gc.h"
#include "libguile/bdw-gc.h"
#include "libguile/threads.h"
#include <gc/gc_inline.h> /* GC_generic_malloc_many */
static inline size_t
scm_inline_gc_bytes_to_freelist_index (size_t bytes)
{
return (bytes - 1U) / SCM_INLINE_GC_GRANULE_BYTES;
}
static inline size_t
scm_inline_gc_freelist_object_size (size_t idx)
{
return (idx + 1U) * SCM_INLINE_GC_GRANULE_BYTES;
}
/* The values of these must match the internal POINTERLESS and NORMAL
definitions in libgc, for which unfortunately there are no external
definitions. Alack. */
typedef enum scm_inline_gc_kind
{
SCM_INLINE_GC_KIND_POINTERLESS,
SCM_INLINE_GC_KIND_NORMAL
} scm_inline_gc_kind;
static inline void *
scm_inline_gc_alloc (void **freelist, size_t idx, scm_inline_gc_kind kind)
{
void *head = *freelist;
if (SCM_UNLIKELY (!head))
{
size_t bytes = scm_inline_gc_freelist_object_size (idx);
GC_generic_malloc_many (bytes, kind, freelist);
head = *freelist;
if (SCM_UNLIKELY (!head))
return (*GC_get_oom_fn ()) (bytes);
}
*freelist = *(void **)(head);
return head;
}
static inline void *
scm_inline_gc_malloc_pointerless (scm_thread *thread, size_t bytes)
{
size_t idx = scm_inline_gc_bytes_to_freelist_index (bytes);
if (SCM_UNLIKELY (idx >= SCM_INLINE_GC_FREELIST_COUNT))
return GC_malloc_atomic (bytes);
return scm_inline_gc_alloc
(&thread->pointerless_freelists[idx], idx, SCM_INLINE_GC_KIND_POINTERLESS);
}
static inline void *
scm_inline_gc_malloc (scm_thread *thread, size_t bytes)
{
size_t idx = scm_inline_gc_bytes_to_freelist_index (bytes);
if (SCM_UNLIKELY (idx >= SCM_INLINE_GC_FREELIST_COUNT))
return GC_malloc (bytes);
return scm_inline_gc_alloc
(&thread->freelists[idx], idx, SCM_INLINE_GC_KIND_NORMAL);
}
static inline void *
scm_inline_gc_malloc_words (scm_thread *thread, size_t words)
{
return scm_inline_gc_malloc (thread, words * sizeof (void *));
}
static inline void *
scm_inline_gc_malloc_pointerless_words (scm_thread *thread, size_t words)
{
return scm_inline_gc_malloc_pointerless (thread, words * sizeof (void *));
}
static inline SCM
scm_inline_cell (scm_thread *thread, scm_t_bits car, scm_t_bits cdr)
{
SCM cell = SCM_PACK_POINTER (scm_inline_gc_malloc_words (thread, 2));
SCM_GC_SET_CELL_WORD (cell, 0, car);
SCM_GC_SET_CELL_WORD (cell, 1, cdr);
return cell;
}
static inline SCM
scm_inline_double_cell (scm_thread *thread, scm_t_bits car, scm_t_bits cbr,
scm_t_bits ccr, scm_t_bits cdr)
{
SCM cell = SCM_PACK_POINTER (scm_inline_gc_malloc_words (thread, 4));
SCM_GC_SET_CELL_WORD (cell, 0, car);
SCM_GC_SET_CELL_WORD (cell, 1, cbr);
SCM_GC_SET_CELL_WORD (cell, 2, ccr);
SCM_GC_SET_CELL_WORD (cell, 3, cdr);
return cell;
}
static inline SCM
scm_inline_words (scm_thread *thread, scm_t_bits car, uint32_t n_words)
{
SCM obj = SCM_PACK_POINTER (scm_inline_gc_malloc_words (thread, n_words));
SCM_GC_SET_CELL_WORD (obj, 0, car);
return obj;
}
static inline SCM
scm_inline_cons (scm_thread *thread, SCM x, SCM y)
{
return scm_inline_cell (thread, SCM_UNPACK (x), SCM_UNPACK (y));
}
#endif /* SCM_GC_INLINE_H */
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