add read barrier to value.p

API changes:
- value.p must be accessed via mrb_value_p macro
- value.p must be mutated via MRB_SET_VALUE_P macro

1 files changed, 2 insertions, 2 deletions

diff --git a/mrbgems/mruby-fiber/src/fiber.c b/mrbgems/mruby-fiber/src/fiber.c
index bd9abe125..4c844ec9c 100644
--- a/mrbgems/mruby-fiber/src/fiber.c
+++ b/mrbgems/mruby-fiber/src/fiber.c
@@ -62,7 +62,7 @@ static mrb_value
 fiber_init(mrb_state *mrb, mrb_value self)
 {
   static const struct mrb_context mrb_context_zero = { 0 };
-  struct RFiber *f = (struct RFiber*)self.value.p;
+  struct RFiber *f = (struct RFiber*)mrb_value_p(self);
   struct mrb_context *c;
   struct RProc *p;
   mrb_callinfo *ci;
@@ -113,7 +113,7 @@ fiber_init(mrb_state *mrb, mrb_value self)
 static struct mrb_context*
 fiber_check(mrb_state *mrb, mrb_value fib)
 {
-  struct RFiber *f = (struct RFiber*)fib.value.p;
+  struct RFiber *f = (struct RFiber*)mrb_value_p(fib);
 
   if (!f->cxt) {
     mrb_raise(mrb, E_ARGUMENT_ERROR, "uninitialized Fiber");