From 7bccf5c995b37e6baf086e465da00a6a333361be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Tomic=CC=8Cevic=CC=81?=
 <dominik.tomicevic@gmail.com>
Date: Sun, 8 Nov 2015 19:05:34 +0100
Subject: [PATCH] made lockable work in const context

---
 threading/sync/lockable.hpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/threading/sync/lockable.hpp b/threading/sync/lockable.hpp
index 01f627d94..2ed9ec605 100644
--- a/threading/sync/lockable.hpp
+++ b/threading/sync/lockable.hpp
@@ -10,17 +10,17 @@ class Lockable
 public:
     using lock_type = lock_t;
 
-    std::lock_guard<lock_t> acquire_guard()
+    std::lock_guard<lock_t> acquire_guard() const
     {
         return std::lock_guard<lock_t>(lock);
     }
 
-    std::unique_lock<lock_t> acquire_unique()
+    std::unique_lock<lock_t> acquire_unique() const
     {
         return std::unique_lock<lock_t>(lock);
     }
-    
-    lock_t lock;
+
+    mutable lock_t lock;
 };
 
 #endif