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- /* 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"
-
- extern value *c_roots_head;
-
- void init_c_roots P((void));
- 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));
- char * stat_alloc P((asize_t)); /* Size in bytes. */
- void stat_free P((char *));
- char * stat_resize P((char *, asize_t)); /* Size in bytes. */
-
-
- #define Alloc_small(result, wosize, tag) { \
- char *_res_ = young_ptr; \
- young_ptr += Bhsize_wosize (wosize); \
- if (young_ptr > young_end){ \
- Setup_for_gc; \
- minor_collection (); \
- Restore_after_gc; \
- _res_ = young_ptr; \
- young_ptr += Bhsize_wosize (wosize); \
- } \
- Hd_hp (_res_) = Make_header ((wosize), (tag), Black); \
- (result) = Val_hp (_res_); \
- }
-
- /* 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].
- */
-
- #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) c_roots_head; \
- c_roots_head = &(name [(size)]);
-
- #define Pop_roots() {c_roots_head = (value *) c_roots_head [1]; }
-
-
- #endif /* _memory_ */
-