[3.9] bpo-45997: Fix asyncio.Semaphore re-acquiring order (GH-31910) (GH-32049)

Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com>.
(cherry picked from commit 32e77154dd)

Co-authored-by: Andrew Svetlov <andrew.svetlov@gmail.com>

Lib/test/test_asyncio/test_locks.py

@@ -961,6 +961,32 @@ class SemaphoreTests(unittest.IsolatedAsyncioTestCase):
         sem.release()
         self.assertFalse(sem.locked())
 
+    async def test_acquire_fifo_order(self):
+        sem = asyncio.Semaphore(1)
+        result = []
+
+        async def coro(tag):
+            await sem.acquire()
+            result.append(f'{tag}_1')
+            await asyncio.sleep(0.01)
+            sem.release()
+
+            await sem.acquire()
+            result.append(f'{tag}_2')
+            await asyncio.sleep(0.01)
+            sem.release()
+
+        t1 = asyncio.create_task(coro('c1'))
+        t2 = asyncio.create_task(coro('c2'))
+        t3 = asyncio.create_task(coro('c3'))
+
+        await asyncio.gather(t1, t2, t3)
+
+        self.assertEqual(
+            ['c1_1', 'c2_1', 'c3_1', 'c1_2', 'c2_2', 'c3_2'],
+            result
+        )
+
 
 if __name__ == '__main__':
     unittest.main()