first commit

testy/archive/threadcondition.py

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+# A condition variable allows one or more threads to wait until they are
+#     notified by another thread.
+
+import threading
+import time
+import logging
+
+logging.basicConfig(level=logging.DEBUG,
+                    format='(%(threadName)-9s) %(message)s',)
+
+def consumer(cv):
+    logging.debug('Consumer thread started ...')
+    with cv:
+        logging.debug('Consumer waiting ...')
+        cv.wait()
+        logging.debug('Consumer consumed the resource')
+
+def producer(cv):
+    logging.debug('Producer thread started ...')
+    with cv:
+        logging.debug('Making resource available')
+        logging.debug('Notifying to all consumers')
+        cv.notify_all()
+
+if __name__ == '__main__':
+    condition = threading.Condition()
+    cs1 = threading.Thread(name='consumer1', target=consumer, args=(condition,))
+    cs2 = threading.Thread(name='consumer2', target=consumer, args=(condition,))
+    pd = threading.Thread(name='producer', target=producer, args=(condition,))
+
+    cs1.start()
+    time.sleep(2)
+    cs2.start()
+    time.sleep(2)
+    pd.start()