System.Threading.Tests.ReaderWriterLockTests.ReadersWaitingOnWaitingWriterTest C# (CSharp) Method

        public static void ReadersWaitingOnWaitingWriterTest()
        {
            var trwl = new TestReaderWriterLock();
            trwl.AcquireReaderLock();

            var waitingWriterReady = new AutoResetEvent(false);
            var continueWaitingWriter = new AutoResetEvent(false);
            Action waitForWaitingWriter;
            Thread waitingWriter =
                ThreadTestHelpers.CreateGuardedThread(out waitForWaitingWriter, () =>
                {
                    trwl.AcquireWriterLock();
                    waitingWriterReady.Set();
                    continueWaitingWriter.CheckedWait();
                    trwl.ReleaseWriterLock();
                });
            waitingWriter.IsBackground = true;
            waitingWriter.Start();
            ThreadTestHelpers.WaitForCondition(() => (waitingWriter.ThreadState & ThreadState.WaitSleepJoin) != 0);

            Action acquireReleaseReaderLock =
                () =>
                {
                    trwl.AcquireReaderLock();
                    trwl.ReleaseReaderLock();
                };
            Action waitForWaitingReader1, waitForWaitingReader2;
            Thread waitingReader1 = ThreadTestHelpers.CreateGuardedThread(out waitForWaitingReader1, acquireReleaseReaderLock);
            Thread waitingReader2 = ThreadTestHelpers.CreateGuardedThread(out waitForWaitingReader2, acquireReleaseReaderLock);
            waitingReader1.IsBackground = true;
            waitingReader2.IsBackground = true;
            waitingReader1.Start();
            waitingReader2.Start();
            ThreadTestHelpers.WaitForCondition(() => (waitingReader1.ThreadState & ThreadState.WaitSleepJoin) != 0);
            ThreadTestHelpers.WaitForCondition(() => (waitingReader2.ThreadState & ThreadState.WaitSleepJoin) != 0);

            // Releasing the read lock releases the waiting writer
            trwl.ReleaseReaderLock();
            waitingWriterReady.CheckedWait();

            // Releasing the now-writer's write lock releases all waiting readers
            continueWaitingWriter.Set();
            waitForWaitingWriter();
            waitForWaitingReader1();
            waitForWaitingReader2();

            trwl.Dispose();
        }