From eb4a8af559cae9374d29617053a1113ac4b7de2e Mon Sep 17 00:00:00 2001
From: Martin Buchholz <martin@openjdk.org>
Date: Mon, 8 Mar 2021 20:11:18 +0000
Subject: [PATCH] 8260664: Phaser.arrive() memory consistency effects

Reviewed-by: dl
---
 .../share/classes/java/util/concurrent/Phaser.java          | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/java.base/share/classes/java/util/concurrent/Phaser.java b/src/java.base/share/classes/java/util/concurrent/Phaser.java
index 9c4f2a57f86..e5dee8b4494 100644
--- a/src/java.base/share/classes/java/util/concurrent/Phaser.java
+++ b/src/java.base/share/classes/java/util/concurrent/Phaser.java
@@ -148,6 +148,12 @@ import java.util.concurrent.locks.LockSupport;
  * returns snapshots of these state queries in a form convenient for
  * informal monitoring.
  *
+ * <p>Memory consistency effects: Actions prior to any form of arrive
+ * method <a href="package-summary.html#MemoryVisibility">
+ * <i>happen-before</i></a> a corresponding phase advance and
+ * onAdvance actions (if present), which in turn <i>happen-before</i>
+ * actions following the phase advance.
+ *
  * <p><b>Sample usages:</b>
  *
  * <p>A {@code Phaser} may be used instead of a {@code CountDownLatch}