From 928a06723d1ede495b7c3b42f3ca48e370ccec77 Mon Sep 17 00:00:00 2001
From: Kenta Murata <mrkn@mrkn.jp>
Date: Sat, 19 Dec 2020 02:45:47 +0900
Subject: [bigdecimal] Make bigdecimal Ractor safe

https://github.com/ruby/bigdecimal/commit/93fc392640
https://github.com/ruby/bigdecimal/commit/a90d13c4d0
---
 ext/bigdecimal/bigdecimal.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'ext/bigdecimal')

diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 9952193e13..039a4d7338 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -189,11 +189,16 @@ BigDecimal_memsize(const void *ptr)
     return (sizeof(*pv) + pv->MaxPrec * sizeof(BDIGIT));
 }
 
+#ifndef HAVE_RB_EXT_RACTOR_SAFE
+#   undef RUBY_TYPED_FROZEN_SHAREABLE
+#   define RUBY_TYPED_FROZEN_SHAREABLE 0
+#endif
+
 static const rb_data_type_t BigDecimal_data_type = {
     "BigDecimal",
     { 0, BigDecimal_delete, BigDecimal_memsize, },
 #ifdef RUBY_TYPED_FREE_IMMEDIATELY
-    0, 0, RUBY_TYPED_FREE_IMMEDIATELY
+    0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_FROZEN_SHAREABLE
 #endif
 };
 
@@ -3351,6 +3356,9 @@ get_vp_value:
 void
 Init_bigdecimal(void)
 {
+#ifdef HAVE_RB_EXT_RACTOR_SAFE
+    rb_ext_ractor_safe(true);
+#endif
     VALUE arg;
 
     id_BigDecimal_exception_mode = rb_intern_const("BigDecimal.exception_mode");
@@ -3617,6 +3625,9 @@ static void VpFormatSt(char *psz, size_t fFmt);
 static int VpRdup(Real *m, size_t ind_m);
 
 #ifdef BIGDECIMAL_DEBUG
+# ifdef HAVE_RB_EXT_RACTOR_SAFE
+#  error Need to make rewiting gnAlloc atomic
+# endif
 static int gnAlloc = 0; /* Memory allocation counter */
 #endif /* BIGDECIMAL_DEBUG */
 
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