MrRezoo
diff --git a/‎src/threat_rlock.py renamed to ‎src/thread_RLock.py b/‎src/threat_rlock.py renamed to ‎src/thread_RLock.py
diff --git a/‎src/threat_lock_safe.py renamed to ‎src/thread_lock_safe.py b/‎src/threat_lock_safe.py renamed to ‎src/thread_lock_safe.py
diff --git a/‎src/thread_semaphore.py
Lines changed: 67 additions & 0 deletions b/‎src/thread_semaphore.py
Lines changed: 67 additions & 0 deletions
@@ -0,0 +1,67 @@
+"""
+    Race condition
+    Thread safe
+    Dead lock
+    atomic
+"""
+from threading import Thread, Semaphore, current_thread, BoundedSemaphore
+from time import sleep
+
+num = 0  # shared resource
+lock_normal = Semaphore(value=2)
+# lock_bounded = BoundedSemaphore(value=2)
+
+def add():
+    global num
+    with lock_normal:
+        print(current_thread().getName())
+        sleep(2)
+        num += 1
+
+
+# def add():
+#     global num
+#     lock_normal.acquire()
+#     print(current_thread().getName())
+#     sleep(2)
+#     num += 1
+#     lock_normal.release()
+
+
+#
+# def add():
+#     global num
+#     lock_bounded.acquire()
+#     print(current_thread().getName())
+#     sleep(2)
+#     num += 1
+#     lock_bounded.release()
+
+t1 = Thread(target=add)
+t2 = Thread(target=add)
+t3 = Thread(target=add)
+t4 = Thread(target=add)
+t5 = Thread(target=add)
+t6 = Thread(target=add)
+t7 = Thread(target=add)
+t8 = Thread(target=add)
+
+t1.start()
+t2.start()
+t3.start()
+t4.start()
+t5.start()
+t6.start()
+t7.start()
+t8.start()
+
+t1.join()
+t2.join()
+t3.join()
+t4.join()
+t5.join()
+t6.join()
+t7.join()
+t8.join()
+
+print('Done . . . ')