Added common.timeout

timeout.py

@@ -0,0 +1,44 @@
+"""
+Timeout decorator
+from ActiveState: http://code.activestate.com/recipes/307871-timing-out-function/
+http://www.saltycrane.com/blog/2010/04/using-python-timeout-decorator-uploading-s3/
+"""
+
+import signal
+
+class TimeoutError(Exception):
+    def __init__(self, value = "Timed Out"):
+        self.value = value
+    def __str__(self):
+        return repr(self.value)
+
+def timeout(seconds_before_timeout):
+    def decorate(f):
+        def handler(signum, frame):
+            raise TimeoutError()
+        def new_f(*args, **kwargs):
+            old = signal.signal(signal.SIGALRM, handler)
+            signal.alarm(seconds_before_timeout)
+            try:
+                result = f(*args, **kwargs)
+            finally:
+                signal.signal(signal.SIGALRM, old)
+            signal.alarm(0)
+            return result
+        new_f.func_name = f.func_name
+        return new_f
+    return decorate
+
+"""
+import time
+
+@timeout(5)
+def mytest():
+    print "Start"
+    for i in range(1,10):
+        time.sleep(1)
+        print "%d seconds have passed" % i
+
+if __name__ == '__main__':
+    mytest()
+"""