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Use trampoline technique for instance_exec; ref #3359

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A new function `mrb_yield_cont()` is provided. You have to call it
at the end of a C defined method, e.g. `return mrb_yield_cont()`.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2017-04-19 19:41:40 +09:00
parent 77c2aa7b8a
commit 6a0b68f8b8
3 changed files with 34 additions and 2 deletions
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include/mruby.h
+5
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@@ -1121,6 +1121,11 @@ MRB_API mrb_value mrb_yield(mrb_state *mrb, mrb_value b, mrb_value arg);
MRB_API mrb_value mrb_yield_argv(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value *argv);
MRB_API mrb_value mrb_yield_with_class(mrb_state *mrb, mrb_value b, mrb_int argc, const mrb_value *argv, mrb_value self, struct RClass *c);
/* continue execution to the proc */
/* this function should always be called as the last function of a method */
/* e.g. return mrb_yield_cont(mrb, proc, self, argc, argv); */
mrb_value mrb_yield_cont(mrb_state *mrb, mrb_value b, mrb_value self, mrb_int argc, const mrb_value *argv);
/* mrb_gc_protect() leaves the object in the arena */
MRB_API void mrb_gc_protect(mrb_state *mrb, mrb_value obj);
/* mrb_gc_register() keeps the object from GC. */