From: Yedidya Feldblum <yfeldblum@fb.com>
Date: Thu, 14 Dec 2017 23:07:18 +0000 (-0800)
Subject: Use explicit memory order in Baton::post
X-Git-Tag: v2017.12.18.00~13
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=c5a4f4c8d0097e02c380967fc7a3a2b39bb78a53;p=folly.git

Use explicit memory order in Baton::post

Summary: [Folly] Use explicit memory order in `Baton::post`.

Reviewed By: djwatson

Differential Revision: D6502268

fbshipit-source-id: a379ea711f165e3645ac2127a49824f46225b80a
---

diff --git a/folly/synchronization/Baton.h b/folly/synchronization/Baton.h
index 379f9021..96b34661 100644
--- a/folly/synchronization/Baton.h
+++ b/folly/synchronization/Baton.h
@@ -128,7 +128,11 @@ struct Baton {
     assert(before == INIT || before == WAITING || before == TIMED_OUT);
 
     if (before == INIT &&
-        state_.compare_exchange_strong(before, EARLY_DELIVERY)) {
+        state_.compare_exchange_strong(
+            before,
+            EARLY_DELIVERY,
+            std::memory_order_release,
+            std::memory_order_relaxed)) {
       return;
     }