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/*
* private-gc.h - private declarations for garbage collection.
*
* Copyright (C) 2002, 03, 04, 05, 06, 07, 08, 09 Free Software Foundation, Inc.
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef SCM_PRIVATE_GC
#define SCM_PRIVATE_GC
#include "_scm.h"
/* {heap tuning parameters}
*
* These are parameters for controlling memory allocation. The heap
* is the area out of which scm_cons, and object headers are allocated.
*
* Each heap cell is 8 bytes on a 32 bit machine and 16 bytes on a
* 64 bit machine. The units of the _SIZE parameters are bytes.
* Cons pairs and object headers occupy one heap cell.
*/
#define SCM_DEFAULT_INIT_HEAP_SIZE_2 32*1024
#define SCM_DOUBLECELL_ALIGNED_P(x) (((2 * sizeof (scm_t_cell) - 1) & SCM_UNPACK (x)) == 0)
SCM_INTERNAL int scm_getenv_int (const char *var, int def);
typedef enum { return_on_error, abort_on_error } policy_on_error;
#define SCM_MAX(A, B) ((A) > (B) ? (A) : (B))
#define SCM_MIN(A, B) ((A) < (B) ? (A) : (B))
/* CELL_P checks a random word whether it has the right form for a
pointer to a cell. Use scm_i_find_heap_segment_containing_object
to find out whether it actually points to a real cell.
The right form for a cell pointer is this: the low three bits must
be scm_tc3_cons, and when the scm_tc3_cons tag is stripped, the
resulting pointer must be correctly aligned.
scm_i_initialize_heap_segment_data guarantees that the test below
works.
*/
#define CELL_P(x) ((SCM_UNPACK(x) & (sizeof(scm_t_cell)-1)) == scm_tc3_cons)
SCM_INTERNAL char const *scm_i_tag_name (scm_t_bits tag); /* MOVEME */
#endif
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