Create peterson.py

Python/peterson.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import threading
+import time
+
+cs = 0
+flag_0 = False
+flag_1 = False
+turn = 0
+
+def thread_0():
+    global cs, flag_0, flag_1, turn
+
+    flag_0 = True
+    turn = 1
+    while (flag_1 and turn == 1):
+            continue
+
+    for i in range(10):
+        cs += 1
+        print("Thread 0: cs =", cs)
+        time.sleep(0.1)
+
+    flag_0 = False
+
+def thread_1():
+    global cs, flag_0, flag_1, turn
+
+    flag_1 = True
+    turn = 0
+    while (flag_0 and turn == 0):
+        continue
+
+    for i in range(10):
+        cs += 1000
+        print("Thread 1: cs =", cs)
+        time.sleep(0.1)
+
+    flag_1 = False
+
+if __name__ == "__main__":
+		t0 = threading.Thread(target=thread_0)
+		t1 = threading.Thread(target=thread_1)
+		t0.start()
+		t1.start()