From 7c647ec616235eb0b774537256a8304ef9803023 Mon Sep 17 00:00:00 2001
From: Dave Jones <dave@waveform.org.uk>
Date: Wed, 23 Sep 2015 13:38:37 +0100
Subject: [PATCH] Fix #23

Add OutputDevice.toggle method with locking for correct threaded
operation
---
 gpiozero/output_devices.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/gpiozero/output_devices.py b/gpiozero/output_devices.py
index 3a5840e..9175f58 100644
--- a/gpiozero/output_devices.py
+++ b/gpiozero/output_devices.py
@@ -1,5 +1,7 @@
-from RPi import GPIO
 from time import sleep
+from threading import Lock
+
+from RPi import GPIO
 
 from .devices import GPIODeviceError, GPIODevice, GPIOThread
 
@@ -24,6 +26,7 @@ class LED(OutputDevice):
     def __init__(self, pin=None):
         super(LED, self).__init__(pin)
         self._blink_thread = None
+        self._lock = Lock()
 
     def blink(self, on_time=1, off_time=1):
         self._stop_blink()
@@ -54,6 +57,13 @@ class LED(OutputDevice):
         self._stop_blink()
         super(LED, self).off()
 
+    def toggle(self):
+        with self._lock:
+            if self.is_active:
+                self.off()
+            else:
+                self.on()
+
 
 class Buzzer(OutputDevice):
     pass