/* 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 (void);EXTERN value alloc_shr (mlsize_t, tag_t);void adjust_gc_speed (mlsize_t, mlsize_t);EXTERN void modify (value *, value);EXTERN void initialize (value *, value);EXTERN char * stat_alloc (asize_t);	         /* Size in bytes. */EXTERN void stat_free (char *);EXTERN char * stat_resize (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_ */