762 lines
19 KiB
C#
762 lines
19 KiB
C#
//
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// ReaderWriterLockSlimTest.cs
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//
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// Authors:
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// Marek Safar (marek.safar@gmail.com)
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//
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// Copyright (C) 2009 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using NUnit.Framework;
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using System.Threading;
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using System.Linq;
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#if NET_4_0
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using System.Threading.Tasks;
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#endif
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namespace MonoTests.System.Threading
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{
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[TestFixture]
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public class ReaderWriterLockSlimTests
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{
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[Test]
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public void DefaultValues ()
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{
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var v = new ReaderWriterLockSlim ();
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Assert.AreEqual (0, v.CurrentReadCount, "1");
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Assert.AreEqual (false, v.IsReadLockHeld, "2");
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Assert.AreEqual (false, v.IsUpgradeableReadLockHeld, "3");
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Assert.AreEqual (false, v.IsWriteLockHeld, "4");
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Assert.AreEqual (LockRecursionPolicy.NoRecursion, v.RecursionPolicy, "5");
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Assert.AreEqual (0, v.RecursiveReadCount, "6");
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Assert.AreEqual (0, v.RecursiveUpgradeCount, "7");
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Assert.AreEqual (0, v.RecursiveWriteCount, "8");
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Assert.AreEqual (0, v.WaitingReadCount, "9");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "10");
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Assert.AreEqual (0, v.WaitingWriteCount, "11");
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}
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[Test]
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public void Dispose_Errors ()
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{
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var v = new ReaderWriterLockSlim ();
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v.Dispose ();
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try {
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v.EnterUpgradeableReadLock ();
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Assert.Fail ("1");
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} catch (ObjectDisposedException) {
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}
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try {
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v.EnterReadLock ();
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Assert.Fail ("2");
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} catch (ObjectDisposedException) {
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}
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try {
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v.EnterWriteLock ();
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Assert.Fail ("3");
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} catch (ObjectDisposedException) {
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}
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}
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[Test]
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public void Dispose_WithReadLock ()
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{
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var rwl = new ReaderWriterLockSlim ();
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rwl.EnterReadLock ();
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try {
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rwl.Dispose ();
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Assert.Fail ("1");
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} catch (SynchronizationLockException) {
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}
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}
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[Test]
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public void Dispose_WithWriteLock ()
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{
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var rwl = new ReaderWriterLockSlim ();
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rwl.EnterWriteLock ();
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try {
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rwl.Dispose ();
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Assert.Fail ("1");
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} catch (SynchronizationLockException) {
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}
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}
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[Test]
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public void Dispose_UpgradeableReadLock ()
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{
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var rwl = new ReaderWriterLockSlim ();
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rwl.EnterUpgradeableReadLock ();
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try {
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rwl.Dispose ();
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Assert.Fail ("1");
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} catch (SynchronizationLockException) {
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}
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}
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[Test]
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public void TryEnterReadLock_OutOfRange ()
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{
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var v = new ReaderWriterLockSlim ();
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try {
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v.TryEnterReadLock (-2);
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Assert.Fail ("1");
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} catch (ArgumentOutOfRangeException) {
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}
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try {
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v.TryEnterReadLock (TimeSpan.MaxValue);
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Assert.Fail ("2");
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} catch (ArgumentOutOfRangeException) {
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}
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try {
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v.TryEnterReadLock (TimeSpan.MinValue);
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Assert.Fail ("3");
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} catch (ArgumentOutOfRangeException) {
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}
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}
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[Test]
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public void TryEnterUpgradeableReadLock_OutOfRange ()
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{
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var v = new ReaderWriterLockSlim ();
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try {
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v.TryEnterUpgradeableReadLock (-2);
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Assert.Fail ("1");
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} catch (ArgumentOutOfRangeException) {
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}
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try {
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v.TryEnterUpgradeableReadLock (TimeSpan.MaxValue);
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Assert.Fail ("2");
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} catch (ArgumentOutOfRangeException) {
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}
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try {
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v.TryEnterUpgradeableReadLock (TimeSpan.MinValue);
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Assert.Fail ("3");
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} catch (ArgumentOutOfRangeException) {
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}
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}
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[Test]
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public void TryEnterWriteLock_OutOfRange ()
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{
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var v = new ReaderWriterLockSlim ();
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try {
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v.TryEnterWriteLock (-2);
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Assert.Fail ("1");
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} catch (ArgumentOutOfRangeException) {
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}
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try {
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v.TryEnterWriteLock (TimeSpan.MaxValue);
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Assert.Fail ("2");
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} catch (ArgumentOutOfRangeException) {
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}
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try {
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v.TryEnterWriteLock (TimeSpan.MinValue);
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Assert.Fail ("3");
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} catch (ArgumentOutOfRangeException) {
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}
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}
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[Test, ExpectedException (typeof (SynchronizationLockException))]
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public void ExitReadLock ()
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{
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var v = new ReaderWriterLockSlim ();
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v.ExitReadLock ();
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}
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[Test, ExpectedException (typeof (SynchronizationLockException))]
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public void ExitWriteLock ()
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{
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var v = new ReaderWriterLockSlim ();
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v.ExitWriteLock ();
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}
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[Test]
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public void EnterReadLock_NoRecursionError ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterReadLock ();
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Assert.AreEqual (1, v.RecursiveReadCount);
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try {
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v.EnterReadLock ();
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Assert.Fail ("1");
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} catch (LockRecursionException) {
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}
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try {
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v.EnterWriteLock ();
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Assert.Fail ("2");
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} catch (LockRecursionException) {
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}
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}
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[Test]
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public void EnterReadLock ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterReadLock ();
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Assert.IsTrue (v.IsReadLockHeld, "A");
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Assert.AreEqual (0, v.RecursiveWriteCount, "A1");
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Assert.AreEqual (1, v.RecursiveReadCount, "A2");
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Assert.AreEqual (0, v.RecursiveUpgradeCount, "A3");
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Assert.AreEqual (0, v.WaitingReadCount, "A4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "A5");
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Assert.AreEqual (0, v.WaitingWriteCount, "A6");
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v.ExitReadLock ();
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v.EnterReadLock ();
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Assert.IsTrue (v.IsReadLockHeld, "B");
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Assert.AreEqual (0, v.RecursiveWriteCount, "B1");
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Assert.AreEqual (1, v.RecursiveReadCount, "B2");
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Assert.AreEqual (0, v.RecursiveUpgradeCount, "B3");
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Assert.AreEqual (0, v.WaitingReadCount, "B4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "B5");
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Assert.AreEqual (0, v.WaitingWriteCount, "B6");
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v.ExitReadLock ();
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}
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[Test]
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public void EnterWriteLock_NoRecursionError ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterWriteLock ();
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Assert.AreEqual (1, v.RecursiveWriteCount);
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try {
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v.EnterWriteLock ();
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Assert.Fail ("1");
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} catch (LockRecursionException) {
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}
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try {
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v.EnterReadLock ();
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Assert.Fail ("2");
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} catch (LockRecursionException) {
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}
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}
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[Test]
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public void EnterWriteLock ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterWriteLock ();
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Assert.IsTrue (v.IsWriteLockHeld, "A");
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Assert.AreEqual (1, v.RecursiveWriteCount, "A1");
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Assert.AreEqual (0, v.RecursiveReadCount, "A2");
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Assert.AreEqual (0, v.RecursiveUpgradeCount, "A3");
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Assert.AreEqual (0, v.WaitingReadCount, "A4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "A5");
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Assert.AreEqual (0, v.WaitingWriteCount, "A6");
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v.ExitWriteLock ();
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v.EnterWriteLock ();
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Assert.IsTrue (v.IsWriteLockHeld, "B");
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Assert.AreEqual (1, v.RecursiveWriteCount, "B1");
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Assert.AreEqual (0, v.RecursiveReadCount, "B2");
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Assert.AreEqual (0, v.RecursiveUpgradeCount, "B3");
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Assert.AreEqual (0, v.WaitingReadCount, "B4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "B5");
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Assert.AreEqual (0, v.WaitingWriteCount, "B6");
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v.ExitWriteLock ();
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}
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[Test]
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public void EnterUpgradeableReadLock_NoRecursionError ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterUpgradeableReadLock ();
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Assert.AreEqual (1, v.RecursiveUpgradeCount);
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try {
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v.EnterUpgradeableReadLock ();
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Assert.Fail ("2");
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} catch (LockRecursionException) {
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}
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}
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[Test]
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public void EnterUpgradeableReadLock ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterUpgradeableReadLock ();
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Assert.IsTrue (v.IsUpgradeableReadLockHeld, "A");
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Assert.AreEqual (0, v.RecursiveWriteCount, "A1");
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Assert.AreEqual (0, v.RecursiveReadCount, "A2");
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Assert.AreEqual (1, v.RecursiveUpgradeCount, "A3");
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Assert.AreEqual (0, v.WaitingReadCount, "A4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "A5");
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Assert.AreEqual (0, v.WaitingWriteCount, "A6");
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v.ExitUpgradeableReadLock ();
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v.EnterUpgradeableReadLock ();
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Assert.IsTrue (v.IsUpgradeableReadLockHeld, "B");
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Assert.AreEqual (0, v.RecursiveWriteCount, "B1");
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Assert.AreEqual (0, v.RecursiveReadCount, "B2");
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Assert.AreEqual (1, v.RecursiveUpgradeCount, "B3");
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Assert.AreEqual (0, v.WaitingReadCount, "B4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "B5");
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Assert.AreEqual (0, v.WaitingWriteCount, "B6");
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v.EnterReadLock ();
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v.ExitUpgradeableReadLock ();
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Assert.IsTrue (v.IsReadLockHeld, "C");
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Assert.AreEqual (0, v.RecursiveWriteCount, "C1");
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Assert.AreEqual (1, v.RecursiveReadCount, "C2");
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Assert.AreEqual (0, v.RecursiveUpgradeCount, "C3");
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Assert.AreEqual (0, v.WaitingReadCount, "C4");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "C5");
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Assert.AreEqual (0, v.WaitingWriteCount, "C6");
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v.ExitReadLock ();
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}
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[Test]
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public void EnterReadLock_MultiRead ()
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{
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var v = new ReaderWriterLockSlim ();
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int local = 10;
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var r = from i in Enumerable.Range (1, 30) select new Thread (() => {
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// Just to cause some contention
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Thread.Sleep (100);
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v.EnterReadLock ();
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Assert.AreEqual (10, local);
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});
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var threads = r.ToList ();
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foreach (var t in threads) {
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t.Start ();
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}
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foreach (var t in threads) {
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// Console.WriteLine (t.ThreadState);
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t.Join ();
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}
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}
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[Test]
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public void TryEnterWriteLock_WhileReading ()
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{
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var v = new ReaderWriterLockSlim ();
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AutoResetEvent ev = new AutoResetEvent (false);
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AutoResetEvent ev2 = new AutoResetEvent (false);
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Thread t1 = new Thread (() => {
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v.EnterReadLock ();
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ev2.Set ();
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ev.WaitOne ();
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v.ExitReadLock ();
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});
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t1.Start ();
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ev2.WaitOne ();
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Assert.IsFalse (v.TryEnterWriteLock (100));
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ev.Set ();
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t1.Join ();
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Assert.IsTrue (v.TryEnterWriteLock (100));
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}
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[Test]
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public void EnterWriteLock_MultiRead ()
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{
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var v = new ReaderWriterLockSlim ();
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int local = 10;
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var r = from i in Enumerable.Range (1, 10) select new Thread (() => {
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v.EnterReadLock ();
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Assert.AreEqual (11, local);
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});
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v.EnterWriteLock ();
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var threads = r.ToList ();
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foreach (var t in threads) {
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t.Start ();
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}
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Thread.Sleep (200);
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local = 11;
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// FIXME: Don't rely on Thread.Sleep (200)
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Assert.AreEqual (0, v.WaitingWriteCount, "in waiting write");
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Assert.AreEqual (10, v.WaitingReadCount, "in waiting read");
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Assert.AreEqual (0, v.WaitingUpgradeCount, "in waiting upgrade");
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v.ExitWriteLock ();
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foreach (var t in threads) {
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// Console.WriteLine (t.ThreadState);
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t.Join ();
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}
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}
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[Test]
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public void EnterWriteLock_After_ExitUpgradeableReadLock ()
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{
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var v = new ReaderWriterLockSlim ();
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v.EnterUpgradeableReadLock ();
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Assert.IsTrue (v.TryEnterWriteLock (100));
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v.ExitWriteLock ();
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v.ExitUpgradeableReadLock ();
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Assert.IsTrue (v.TryEnterWriteLock (100));
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v.ExitWriteLock ();
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}
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#if NET_4_0
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[Test]
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public void EnterWriteLockWhileInUpgradeAndOtherWaiting ()
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{
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var v = new ReaderWriterLockSlim ();
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var task2 = new Task(() => {
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v.EnterWriteLock();
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v.ExitWriteLock();
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});
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var task1 = new Task(() =>
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{
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v.EnterUpgradeableReadLock ();
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task2.Start ();
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Thread.Sleep (100);
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v.EnterWriteLock ();
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v.ExitWriteLock ();
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v.ExitUpgradeableReadLock ();
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});
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task1.Start ();
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Assert.IsTrue (task1.Wait (500));
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}
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#endif
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[Test]
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public void RecursiveReadLockTest ()
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{
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var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
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Assert.IsTrue (v.TryEnterReadLock (100), "#1");
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Assert.IsTrue (v.TryEnterReadLock (100), "#2");
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Assert.IsTrue (v.TryEnterReadLock (100), "#3");
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Assert.AreEqual (3, v.RecursiveReadCount);
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}
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[Test]
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public void RecursiveReadPlusWriteLockTest ()
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{
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var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
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try {
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v.EnterReadLock ();
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v.EnterWriteLock ();
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Assert.Fail ("1");
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} catch (LockRecursionException ex) {
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Assert.IsNotNull (ex, "#1");
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}
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}
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[Test]
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public void RecursiveReadPlusUpgradeableLockTest ()
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{
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var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
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try {
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v.EnterReadLock ();
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v.EnterUpgradeableReadLock ();
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Assert.Fail ("1");
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} catch (LockRecursionException ex) {
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Assert.IsNotNull (ex, "#1");
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}
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}
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[Test]
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public void RecursiveWriteLockTest ()
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{
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var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
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Assert.IsTrue (v.TryEnterWriteLock (100), "#1");
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Assert.IsTrue (v.TryEnterWriteLock (100), "#2");
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Assert.IsTrue (v.TryEnterWriteLock (100), "#3");
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Assert.AreEqual (3, v.RecursiveWriteCount);
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}
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[Test]
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public void RecursiveWritePlusReadLockTest ()
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{
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var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
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Assert.IsTrue (v.TryEnterWriteLock (100), "#1");
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Assert.AreEqual (1, v.RecursiveWriteCount, "1b");
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Assert.AreEqual (0, v.RecursiveReadCount, "1c");
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Assert.IsTrue (v.TryEnterReadLock (100), "#2");
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Assert.AreEqual (1, v.RecursiveWriteCount, "2b");
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Assert.AreEqual (1, v.RecursiveReadCount, "2c");
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Assert.IsTrue (v.TryEnterReadLock (100), "#3");
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Assert.AreEqual (1, v.RecursiveWriteCount, "3b");
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Assert.AreEqual (2, v.RecursiveReadCount, "3c");
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v.ExitReadLock ();
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Assert.AreEqual (1, v.RecursiveWriteCount, "4b");
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Assert.AreEqual (1, v.RecursiveReadCount, "4c");
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}
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[Test]
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public void RecursiveUpgradeableReadLockTest ()
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{
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var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
Assert.IsTrue (v.TryEnterUpgradeableReadLock (100), "#1");
|
|
Assert.IsTrue (v.TryEnterUpgradeableReadLock (100), "#2");
|
|
Assert.IsTrue (v.TryEnterUpgradeableReadLock (100), "#3");
|
|
|
|
Assert.AreEqual (3, v.RecursiveUpgradeCount);
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveReadPropertiesTest ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterReadLock ();
|
|
v.EnterReadLock ();
|
|
|
|
Assert.AreEqual (true, v.IsReadLockHeld, "#1a");
|
|
Assert.AreEqual (1, v.CurrentReadCount, "#2a");
|
|
Assert.AreEqual (2, v.RecursiveReadCount, "#3a");
|
|
|
|
bool rLock = true;
|
|
int cReadCount = -1, rReadCount = -1;
|
|
|
|
Thread t = new Thread ((_) => {
|
|
rLock = v.IsReadLockHeld;
|
|
cReadCount = v.CurrentReadCount;
|
|
rReadCount = v.RecursiveReadCount;
|
|
});
|
|
|
|
t.Start ();
|
|
t.Join ();
|
|
|
|
Assert.AreEqual (false, rLock, "#1b");
|
|
Assert.AreEqual (1, cReadCount, "#2b");
|
|
Assert.AreEqual (0, rReadCount, "#3b");
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveUpgradePropertiesTest ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterUpgradeableReadLock ();
|
|
v.EnterUpgradeableReadLock ();
|
|
|
|
Assert.AreEqual (true, v.IsUpgradeableReadLockHeld, "#1a");
|
|
Assert.AreEqual (false, v.IsReadLockHeld, "#11a");
|
|
Assert.AreEqual (0, v.CurrentReadCount, "#2a");
|
|
Assert.AreEqual (2, v.RecursiveUpgradeCount, "#3a");
|
|
|
|
bool upLock = false, rLock = false;
|
|
int rCount = -1, rUCount = -1;
|
|
|
|
Thread t = new Thread ((_) => {
|
|
upLock = v.IsUpgradeableReadLockHeld;
|
|
rLock = v.IsReadLockHeld;
|
|
rCount = v.CurrentReadCount;
|
|
rUCount = v.RecursiveUpgradeCount;
|
|
});
|
|
|
|
t.Start ();
|
|
t.Join ();
|
|
|
|
Assert.AreEqual (false, upLock, "#1b");
|
|
Assert.AreEqual (false, rLock, "#11b");
|
|
Assert.AreEqual (0, rCount, "#2b");
|
|
Assert.AreEqual (0, rUCount, "#3b");
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveWritePropertiesTest ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterWriteLock ();
|
|
v.EnterWriteLock ();
|
|
|
|
Assert.AreEqual (true, v.IsWriteLockHeld, "#1a");
|
|
Assert.AreEqual (2, v.RecursiveWriteCount, "#3a");
|
|
|
|
bool wLock = false;
|
|
int rWrite = -1;
|
|
|
|
Thread t = new Thread ((_) => {
|
|
wLock = v.IsWriteLockHeld;
|
|
rWrite = v.RecursiveWriteCount;
|
|
});
|
|
|
|
t.Start ();
|
|
t.Join ();
|
|
|
|
Assert.AreEqual (false, wLock, "#1b");
|
|
Assert.AreEqual (0, rWrite, "#3b");
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveEnterExitReadTest ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterReadLock ();
|
|
v.EnterReadLock ();
|
|
v.EnterReadLock ();
|
|
|
|
Assert.IsTrue (v.IsReadLockHeld);
|
|
Assert.AreEqual (3, v.RecursiveReadCount);
|
|
|
|
v.ExitReadLock ();
|
|
|
|
Assert.IsTrue (v.IsReadLockHeld);
|
|
Assert.AreEqual (2, v.RecursiveReadCount);
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveEnterExitWriteTest ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterWriteLock ();
|
|
v.EnterWriteLock ();
|
|
v.EnterWriteLock ();
|
|
|
|
Assert.IsTrue (v.IsWriteLockHeld);
|
|
Assert.AreEqual (3, v.RecursiveWriteCount);
|
|
|
|
v.ExitWriteLock ();
|
|
v.ExitWriteLock ();
|
|
|
|
Assert.IsTrue (v.IsWriteLockHeld);
|
|
Assert.AreEqual (1, v.RecursiveWriteCount);
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveEnterExitUpgradableTest ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterUpgradeableReadLock ();
|
|
v.EnterUpgradeableReadLock ();
|
|
v.EnterUpgradeableReadLock ();
|
|
|
|
Assert.IsTrue (v.IsUpgradeableReadLockHeld);
|
|
Assert.AreEqual (3, v.RecursiveUpgradeCount);
|
|
|
|
v.ExitUpgradeableReadLock ();
|
|
|
|
Assert.IsTrue (v.IsUpgradeableReadLockHeld);
|
|
Assert.AreEqual (2, v.RecursiveUpgradeCount);
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveWriteUpgradeReadTest ()
|
|
{
|
|
var rwlock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
|
|
|
|
rwlock.EnterWriteLock ();
|
|
Assert.IsTrue (rwlock.IsWriteLockHeld);
|
|
rwlock.EnterUpgradeableReadLock ();
|
|
Assert.IsTrue (rwlock.IsUpgradeableReadLockHeld);
|
|
rwlock.EnterReadLock ();
|
|
Assert.IsTrue (rwlock.IsReadLockHeld);
|
|
rwlock.ExitUpgradeableReadLock();
|
|
Assert.IsFalse (rwlock.IsUpgradeableReadLockHeld);
|
|
Assert.IsTrue (rwlock.IsReadLockHeld);
|
|
Assert.IsTrue (rwlock.IsWriteLockHeld);
|
|
|
|
rwlock.ExitReadLock ();
|
|
Assert.IsTrue (rwlock.IsWriteLockHeld);
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveWriteUpgradeTest ()
|
|
{
|
|
ReaderWriterLockSlim rwlock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
|
|
|
|
rwlock.EnterWriteLock ();
|
|
Assert.IsTrue (rwlock.IsWriteLockHeld);
|
|
rwlock.EnterUpgradeableReadLock ();
|
|
Assert.IsTrue (rwlock.IsUpgradeableReadLockHeld);
|
|
rwlock.ExitUpgradeableReadLock ();
|
|
Assert.IsFalse (rwlock.IsUpgradeableReadLockHeld);
|
|
Assert.IsTrue (rwlock.IsWriteLockHeld);
|
|
rwlock.ExitWriteLock ();
|
|
Assert.IsFalse (rwlock.IsWriteLockHeld);
|
|
rwlock.EnterWriteLock ();
|
|
Assert.IsTrue (rwlock.IsWriteLockHeld);
|
|
}
|
|
|
|
[Test]
|
|
public void RecursiveWriteReadAcquisitionInterleaving ()
|
|
{
|
|
var v = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
|
|
|
|
v.EnterWriteLock ();
|
|
Assert.IsTrue (v.IsWriteLockHeld, "#1");
|
|
|
|
bool result = true;
|
|
var t = new Thread (delegate () {
|
|
result = v.TryEnterReadLock (100);
|
|
});
|
|
t.Start ();
|
|
t.Join ();
|
|
Assert.IsFalse (result, "#2");
|
|
|
|
v.ExitWriteLock ();
|
|
t = new Thread (delegate () {
|
|
result = v.TryEnterReadLock (100);
|
|
});
|
|
t.Start ();
|
|
t.Join ();
|
|
Assert.IsTrue (result, "#3");
|
|
}
|
|
}
|
|
}
|