diff options
Diffstat (limited to 'gc.h')
| -rw-r--r-- | gc.h | 16 |
1 files changed, 15 insertions, 1 deletions
@@ -57,5 +57,19 @@ rb_gc_debug_body(char *mode, char *msg, int st, void *ptr) #define RUBY_MARK_UNLESS_NULL(ptr) if(RTEST(ptr)){rb_gc_mark(ptr);} #define RUBY_FREE_UNLESS_NULL(ptr) if(ptr){ruby_xfree(ptr);} -#endif /* RUBY_GC_H */ +#if STACK_GROW_DIRECTION > 0 +# define STACK_UPPER(x, a, b) a +#elif STACK_GROW_DIRECTION < 0 +# define STACK_UPPER(x, a, b) b +#else +RUBY_EXTERN int ruby_stack_grow_direction; +int ruby_get_stack_grow_direction(VALUE *addr); +# define stack_growup_p(x) ( \ + (ruby_stack_grow_direction ? \ + ruby_stack_grow_direction : \ + ruby_get_stack_grow_direction(x)) > 0) +# define STACK_UPPER(x, a, b) (stack_growup_p(x) ? a : b) +#endif + +#endif /* RUBY_GC_H */ |