From 9beee9f6022a745a40537c0b5d26dc8a43d35944 Mon Sep 17 00:00:00 2001
From: Grzegorz Bizon <grzesiek.bizon@gmail.com>
Date: Fri, 27 Sep 2019 11:07:16 +0200
Subject: Create a factory method for Domains to handle mutex better

---
 internal/source/domains.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'internal/source/domains.go')

diff --git a/internal/source/domains.go b/internal/source/domains.go
index 54a269d8..85646b8a 100644
--- a/internal/source/domains.go
+++ b/internal/source/domains.go
@@ -13,7 +13,16 @@ import (
 // currently reading them from disk.
 type Domains struct {
 	dm   disk.Map
-	lock sync.RWMutex
+	lock *sync.RWMutex
+}
+
+// NewDomains is a factory method for domains initializing a mutex. It should
+// not initialize `dm` as we later check the readiness by comparing it with a
+// nil value.
+func NewDomains() *Domains {
+	return &Domains{
+		lock: new(sync.RWMutex),
+	}
 }
 
 // GetDomain returns a domain from the domains map
-- 
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