From af8a742d00f9d47b832f6f2d50a8e1c89bbf8441 Mon Sep 17 00:00:00 2001
From: Zsolt Felfoldi <zsfelfoldi@gmail.com>
Date: Wed, 30 Nov 2016 06:02:08 +0100
Subject: les: improved header fetcher and server statistics

---
 light/lightchain.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'light')

diff --git a/light/lightchain.go b/light/lightchain.go
index 1cea7a892..d397f5006 100644
--- a/light/lightchain.go
+++ b/light/lightchain.go
@@ -505,3 +505,14 @@ func (self *LightChain) SyncCht(ctx context.Context) bool {
 	}
 	return false
 }
+
+// LockChain locks the chain mutex for reading so that multiple canonical hashes can be
+// retrieved while it is guaranteed that they belong to the same version of the chain
+func (self *LightChain) LockChain() {
+	self.chainmu.RLock()
+}
+
+// UnlockChain unlocks the chain mutex
+func (self *LightChain) UnlockChain() {
+	self.chainmu.RUnlock()
+}
-- 
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