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