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* lisp.h (make_number) [!NO_UNION_TYPE && __GNUC__ >= 2 && __OPTIMIZE__]:

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Provide a GNU C macro version that handles lisp-object unions.
(XSET) [!NO_UNION_TYPE]: Set the value field first, then the type field, to
better cope with ENABLE_CHECKING and calls that modify a Lisp_Object using its
old value.
This commit is contained in:
Ken Raeburn 2000-04-05 18:47:29 +00:00
parent 7c752c8099
commit 74e49b38a8
2 changed files with 13 additions and 1 deletions
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7
src/lisp.h
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@ -424,9 +424,14 @@ extern int pure_size;
#define XPNTR(a) ((a).u.val)
#define XSET(var, vartype, ptr) \
(((var).s.type = ((char) (vartype))), ((var).s.val = ((int) (ptr))))
(((var).s.val = ((int) (ptr))), ((var).s.type = ((char) (vartype))))
#if __GNUC__ >= 2 && defined (__OPTIMIZE__)
#define make_number(N) \
(__extension__ ({ Lisp_Object _l; _l.s.val = (N); _l.s.type = Lisp_Int; _l; }))
#else
extern Lisp_Object make_number ();
#endif
/* During garbage collection, XGCTYPE must be used for extracting types
so that the mark bit is ignored. XMARKBIT access the markbit.