From 9e31d6d4795acd561271409babd6d7852377fe6a Mon Sep 17 00:00:00 2001
From: Evan Zelkowitz <evan.zelkowitz@gmail.com>
Date: Wed, 8 Dec 2021 15:13:25 -0700
Subject: [PATCH] Changed to using std::atomic ptr for hosting and do ptr swap

---
 iocore/cache/P_CacheHosting.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/iocore/cache/P_CacheHosting.h b/iocore/cache/P_CacheHosting.h
index ba6fecd812d..0948601d0ed 100644
--- a/iocore/cache/P_CacheHosting.h
+++ b/iocore/cache/P_CacheHosting.h
@@ -152,7 +152,7 @@ class CacheHostTable
 struct CacheHostTableConfig;
 typedef int (CacheHostTableConfig::*CacheHostTabHandler)(int, void *);
 struct CacheHostTableConfig : public Continuation {
-  CacheHostTable **ppt;
+  std::atomic<CacheHostTable **> ppt;
   CacheHostTableConfig(CacheHostTable **appt) : Continuation(nullptr), ppt(appt)
   {
     SET_HANDLER((CacheHostTabHandler)&CacheHostTableConfig::mainEvent);
@@ -163,8 +163,9 @@ struct CacheHostTableConfig : public Continuation {
   {
     (void)e;
     (void)event;
-    CacheHostTable *t   = new CacheHostTable((*ppt)->cache, (*ppt)->type);
-    CacheHostTable *old = (CacheHostTable *)ink_atomic_swap(&t, *ppt);
+    CacheHostTable *t = new CacheHostTable((*ppt)->cache, (*ppt)->type);
+    auto old          = *ppt;
+    (*ppt)            = t;
     new_Deleter(old, CACHE_MEM_FREE_TIMEOUT);
     return EVENT_DONE;
   }