113 lines
4.9 KiB
C
113 lines
4.9 KiB
C
/***********************************************************************/
|
|
/* */
|
|
/* Objective Caml */
|
|
/* */
|
|
/* Damien Doligez, projet Para, INRIA Rocquencourt */
|
|
/* */
|
|
/* Copyright 1996 Institut National de Recherche en Informatique et */
|
|
/* Automatique. Distributed only by permission. */
|
|
/* */
|
|
/***********************************************************************/
|
|
|
|
/* $Id$ */
|
|
|
|
/* Allocation macros and functions */
|
|
|
|
#ifndef _memory_
|
|
#define _memory_
|
|
|
|
|
|
#include "config.h"
|
|
#include "gc.h"
|
|
#include "major_gc.h"
|
|
#include "minor_gc.h"
|
|
#include "misc.h"
|
|
#include "mlvalues.h"
|
|
|
|
value alloc_shr P((mlsize_t, tag_t));
|
|
void adjust_gc_speed P((mlsize_t, mlsize_t));
|
|
void modify P((value *, value));
|
|
void initialize P((value *, value));
|
|
value check_urgent_gc P((value));
|
|
char * stat_alloc P((asize_t)); /* Size in bytes. */
|
|
void stat_free P((char *));
|
|
char * stat_resize P((char *, asize_t)); /* Size in bytes. */
|
|
|
|
|
|
#ifdef NATIVE_CODE
|
|
#define Garbage_collection_function garbage_collection
|
|
#else
|
|
#define Garbage_collection_function minor_collection
|
|
#endif
|
|
|
|
#define Alloc_small(result, wosize, tag) { \
|
|
young_ptr -= Bhsize_wosize (wosize); \
|
|
if (young_ptr < young_limit){ \
|
|
Setup_for_gc; \
|
|
Garbage_collection_function (); \
|
|
Restore_after_gc; \
|
|
young_ptr -= Bhsize_wosize (wosize); \
|
|
} \
|
|
Hd_hp (young_ptr) = Make_header ((wosize), (tag), Black); \
|
|
(result) = Val_hp (young_ptr); \
|
|
}
|
|
|
|
/* You must use [Modify] to change a field of an existing shared block,
|
|
unless you are sure the value being overwritten is not a shared block and
|
|
the value being written is not a young block. */
|
|
/* [Modify] never calls the GC. */
|
|
|
|
#define Modify(fp, val) { \
|
|
value _old_ = *(fp); \
|
|
*(fp) = (val); \
|
|
if (Is_in_heap (fp)){ \
|
|
if (gc_phase == Phase_mark) darken (_old_); \
|
|
if (Is_block (val) && Is_young (val) \
|
|
&& ! (Is_block (_old_) && Is_young (_old_))){ \
|
|
*ref_table_ptr++ = (fp); \
|
|
if (ref_table_ptr >= ref_table_limit){ \
|
|
Assert (ref_table_ptr == ref_table_limit); \
|
|
realloc_ref_table (); \
|
|
} \
|
|
} \
|
|
} \
|
|
} \
|
|
|
|
/* [Push_roots] and [Pop_roots] are used for C variables that are GC roots.
|
|
* It must contain all values in C local variables at the time the minor GC is
|
|
* called.
|
|
* Usage:
|
|
* At the end of the declarations of your C local variables, add
|
|
* [ Push_roots (variable_name, size); ]
|
|
* The size is the number of declared roots. They are accessed as
|
|
* [ variable_name [0] ... variable_name [size - 1] ].
|
|
* The [variable_name] and the [size] must not be [ _ ].
|
|
* Just before the function return, add a call to [Pop_roots].
|
|
*/
|
|
|
|
extern value *local_roots;
|
|
|
|
#define Push_roots(name, size) \
|
|
value name [(size) + 2]; \
|
|
{ long _; for (_ = 0; _ < (size); name [_++] = Val_long (0)); } \
|
|
name [(size)] = (value) (size); \
|
|
name [(size) + 1] = (value) local_roots; \
|
|
local_roots = &(name [(size)]);
|
|
|
|
#define Pop_roots() {local_roots = (value *) local_roots [1]; }
|
|
|
|
/* [register_global_root] registers a global C variable as a memory root
|
|
for the duration of the program, or until [remove_global_root] is
|
|
called. */
|
|
|
|
void register_global_root P((value *));
|
|
|
|
/* [remove_global_root] removes a memory root registered on a global C
|
|
variable with [register_global_root]. */
|
|
|
|
void remove_global_root P((value *));
|
|
|
|
|
|
#endif /* _memory_ */
|
|
|