typedef unsigned int u32;
typedef signed int s32;
#define LOW_WORD(c) ((long)(c) & 0xFFFFFFFFL)
-
+/* this is an integral type the same length as a machine pointer */
+typedef unsigned long pointer_sized_uint_t ;
typedef u32 lispobj;
/* Convert from a lispobj with type bits to a native (ordinary
* C/assembly) pointer to the beginning of the object. */
-static inline lispobj
+static inline lispobj *
native_pointer(lispobj obj)
{
- return obj & ~LOWTAG_MASK;
+ return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
}
+/* inverse operation: create a suitably tagged lispobj from a native
+ * pointer or integer. Needs to be a macro due to the tedious C type
+ * system */
+#define make_lispobj(o,low_tag) ((lispobj)(LOW_WORD(o)|low_tag))
/* FIXME: There seems to be no reason that make_fixnum and fixnum_value
* can't be implemented as (possibly inline) functions. */
/* This only works for static symbols. */
/* FIXME: should be called StaticSymbolFunction, right? */
#define SymbolFunction(sym) \
- (((struct fdefn *)(SymbolValue(sym)-OTHER_POINTER_LOWTAG))->fun)
+ (((struct fdefn *)(native_pointer(SymbolValue(sym))))->fun)
/* KLUDGE: As far as I can tell there's no ANSI C way of saying
* "this function never returns". This is the way that you do it