MultiSource/Benchmarks/MallocBench/gs/store.h

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/* store.h */
/* Assignment macros */

/*
 * Macros for storing a ref.  We use macros for storing into objects,
 * since this is what a reference counting storage manager needs to know.
 * We also use macros for other ref assignments, because (as it happens)
 * Turbo C generates pretty awful code for doing this.
 *
 * The potentially reference counted macro names all have the form
 *	<place><new_type>(place_to_store, new_value)
 * <place> may be either
 *	store (for an unrestricted store)
 *	n_store (for storing into a new object, or when the old contents
 *	  are known not to be a pointer-type ref)
 * <new_type> and new_value are chosen from the following alternatives:
 *	_i		POINTER TO arbitrary ref
 *	_i_n		POINTER TO non-pointer-type ref
 *	(nothing)	arbitrary ref
 *	_n		non-pointer-type ref
 *	_tv		type, value field name, value
 *			  (only for scalars, which don't have attributes)
 *	_tav		type, attributes, value field name, value
 *	_tasv		type, attributes, size, value field name, value
 *	_int		integer value
 *	_real		float value
 *
 * For _tav and _tasv, we must store the value first, because sometimes
 * it depends on the contents of the place being stored into.
 * Note that n_store_tav and n_store_tasv are only needed if
 * the type being stored is a pointer type.
 *
 * In addition, we define make_xxx macros for making refs on the stack,
 * and s_store[_*](place_to_store, new_value) for stores to the stack
 * or to local variables.  For s_store_*, new_value must be a simple
 * variable because of the ref_assign macro (see below).
 *
 * Note that the storage manager is not actually implemented yet,
 * so none of the macros do anything special.
 */

/*
 * Here is where we check for getting around Turbo C's inefficiencies.
 */
#ifdef __MSDOS__
	/* ref_assign is an assembly code procedure */
extern	void	ref_assign(P2(ref *, ref *));
#else
	/* ref_assign is a macro */
#  define ref_assign(pto,pfrom) (*(pto) = *(pfrom))
#endif

#define n_store_i(pto,pfrom) ref_assign(pto,pfrom)
#define n_store_i_n(pto,pfrom) ref_assign(pto,pfrom)
#define n_store(pref,newref) (*(pref)=(newref))
#define n_store_n(pref,newref) (*(pref)=(newref))
#define store_i(pto,pfrom) ref_assign(pto,pfrom)
#define store_i_n(pto,pfrom) ref_assign(pto,pfrom)
#define store(pref,newref) n_store(pref,newref)
#define store_n(pref,newref) n_store(pref,newref)

#define n_store_tv(pref,newtype,valfield,newvalue)\
  ((pref)->value.valfield = (newvalue),\
   r_set_type(pref, newtype))
#define store_tv(pref,t,vf,v) n_store_tv(pref,t,vf,v)
#define make_tv(pref,t,vf,v) n_store_tv(pref,t,vf,v)

#define n_store_tav(pref,newtype,newattrs,valfield,newvalue)\
  ((pref)->value.valfield = (newvalue),\
   r_set_type_attrs(pref, newtype, newattrs))
#define store_tav(pref,t,a,vf,v) n_store_tav(pref,t,a,vf,v)
#define make_tav(pref,t,a,vf,v) n_store_tav(pref,t,a,vf,v)

#define n_store_tasv(pref,newtype,newattrs,newsize,valfield,newvalue)\
  (n_store_tav(pref,newtype,newattrs,valfield,newvalue),\
   (pref)->size = (newsize))
#define store_tasv(pref,t,a,s,vf,v) n_store_tasv(pref,t,a,s,vf,v)
#define make_tasv(pref,t,a,s,vf,v) n_store_tasv(pref,t,a,s,vf,v)

#define make_bool(pref,bval)\
  n_store_tv(pref,t_boolean,index,bval)
#define make_false(pref) make_bool(pref,0)
#define make_true(pref) make_bool(pref,1)

#define n_store_int(pref,ival)\
  n_store_tv(pref,t_integer,intval,ival)
#define store_int(pref,ival) n_store_int(pref,ival)
#define make_int(pref,ival) n_store_int(pref,ival)

#define make_mark(pref) make_tv(pref, t_mark, intval, 0)

#define make_null(pref) make_tv(pref, t_null, intval, 0)

#define n_store_real(pref,rval)\
  n_store_tv(pref,t_real,realval,rval)
#define store_real(pref,rval) n_store_real(pref,rval)
#define make_real(pref,rval) n_store_real(pref,rval)

#define s_store(pref,newref) (*(pref)=(newref))