X-Git-Url: https://git.ayoreis.com/hackapet/Adafruit_Blinka.git/blobdiff_plain/d718837dec2d148bc6177bc67efd9eb2a5d62cea..a8a160c837be23b17fd159a270edf7c4a6304b88:/python/mcp/__init__.py

diff --git a/python/mcp/__init__.py b/python/mcp/__init__.py
index 799f336..0e52a3c 100644
--- a/python/mcp/__init__.py
+++ b/python/mcp/__init__.py
@@ -30,8 +30,25 @@ class Enum(object):
                 yield (key, val)
 
 
-class Pin(Enum):
-    def __init__(self, id):
-        """ id type is likely platform-specific"""
-        self.id = id
-    pass
+class ContextManaged:
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.deinit()
+
+def Lockable(ContextManaged):
+    _locked = False
+
+    def try_lock(self):
+        if self._locked:
+            return False
+        else:
+            self._locked=True
+            return True
+
+    def unlock(self):
+        if self._locked:
+            self._locked = False
+        else:
+            raise ValueError("Not locked")