From 0184caac9de25258b23156016b3528e9878f1dae Mon Sep 17 00:00:00 2001
From: Nick Rivera <heronr@users.noreply.github.com>
Date: Thu, 9 Apr 2020 20:23:06 -0700
Subject: [PATCH] Provides an optional cleanup callback for async data.

---
 async.c | 5 +++++
 async.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/async.c b/async.c
index a966ed5..6990e86 100644
--- a/async.c
+++ b/async.c
@@ -109,6 +109,7 @@ static redisAsyncContext *redisAsyncInitialize(redisContext *c) {
     ac->err = 0;
     ac->errstr = NULL;
     ac->data = NULL;
+    ac->dataCleanup = NULL;
 
     ac->ev.data = NULL;
     ac->ev.addRead = NULL;
@@ -299,6 +300,10 @@ static void __redisAsyncFree(redisAsyncContext *ac) {
         }
     }
 
+    if (ac->dataCleanup) {
+        ac->dataCleanup(ac->data);
+    }
+
     /* Cleanup self */
     redisFree(c);
 }
diff --git a/async.h b/async.h
index 4f6b3b7..781f1d1 100644
--- a/async.h
+++ b/async.h
@@ -70,6 +70,7 @@ typedef struct redisAsyncContext {
 
     /* Not used by hiredis */
     void *data;
+    void (*dataCleanup)(void *privdata);
 
     /* Event library data and hooks */
     struct {