diff options
Diffstat (limited to 'gcc/ggc.h')
| -rw-r--r-- | gcc/ggc.h | 46 |
1 files changed, 46 insertions, 0 deletions
@@ -276,4 +276,50 @@ ggc_alloc_cleared_gimple_statement_d_stat (size_t s MEM_STAT_DECL) ggc_internal_cleared_alloc_stat (s PASS_MEM_STAT); } +/* gengtype will autogenerate traversal functions (in gtype-desc.c) for + all GTY-marked types that it sees are referenced by a GTY marker. + + Unfortunately, it will not generate traveral functions for types that + are only referenced by GTY((user)) types. + + The following templates are a substitute, providing equivalent + traversal functions for such types. They are instantiated for + types whose objects that are traversed during GC/PCH, and are + called *every time* that an instance of type T is traversed during + GC/PCH. + + They require the presence of the following member functions + + void gt_ggc_mx (); + void gt_pch_nx (); + void gt_pch_nx_with_op (gt_pointer_operator op, void *cookie); + + within class T, which are called *once* per object - the first + time the object is visited during the traversal. */ + +template<class T> +inline void gt_ggc_mx (T *p) +{ + if (ggc_test_and_set_mark (p)) + p->gt_ggc_mx (); +} + +template<class T> +void gt_pch_nx_with_op (void *this_obj, void *p, + gt_pointer_operator op, void *cookie) +{ + if (p == this_obj) + { + T *t = static_cast<T *>(p); + t->gt_pch_nx_with_op (op, cookie); + } +} + +template<class T> +inline void gt_pch_nx (T *p) +{ + if (gt_pch_note_object (p, p, gt_pch_nx_with_op<T>)) + p->gt_pch_nx (); +} + #endif |