From 15c51e3d6e9c7b31a82e74988b3929ff0eb0f27a Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Mon, 18 Jan 2016 12:07:41 -0500
Subject: Add explicit returns to some functions

---
(limited to 'src/mutex.sh')

diff --git a/src/mutex.sh b/src/mutex.sh
index cd4a365..ab9824c 100644
--- a/src/mutex.sh
+++ b/src/mutex.sh
@@ -23,6 +23,8 @@ mutex_trylock()
 	local mutex="${1}"
 
 	(set -C; printf '%d\n' "${$}" >"${mutex}") 2>/dev/null
+
+	return ${?}
 }
 
 mutex_timedlock()
@@ -51,4 +53,6 @@ mutex_is_unlockable()
 	local mutex="${1}"
 
 	[ "x$(cat "${mutex}" 2>/dev/null)" = "x${$}" ]
+
+	return ${?}
 }
--
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