From aba0929a5ab10af0388a0528ec453ab29e6625c3 Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 20 Aug 2018 23:48:03 +0000
Subject: cont.c (struct rb_fiber_struct): bitfields for trasnferred and status

On 32-bit x86, this reduces the struct from 836 to 832 bytes and
brings us down to 13 (64-byte) cachelines (from 14).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 cont.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'cont.c')

diff --git a/cont.c b/cont.c
index e7ad79f99c..f1d5bc8dc3 100644
--- a/cont.c
+++ b/cont.c
@@ -175,12 +175,12 @@ struct rb_fiber_struct {
     rb_context_t cont;
     VALUE first_proc;
     struct rb_fiber_struct *prev;
-    enum fiber_status status;
+    BITFIELD(enum fiber_status status) : 2;
     /* If a fiber invokes "transfer",
      * then this fiber can't "resume" any more after that.
      * You shouldn't mix "transfer" and "resume".
      */
-    int transferred;
+    unsigned int transferred : 1;
 
 #if FIBER_USE_NATIVE
 #ifdef _WIN32
-- 
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