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//
// SpinLockTests.cs
//
// Author:
// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
//
// Copyright (c) 2010 Jérémie "Garuma" Laval
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Threading;
using NUnit.Framework;
using MonoTests.System.Threading.Tasks;
namespace MonoTests.System.Threading
{
[TestFixture]
public class SpinLockTests
{
SpinLock sl;
[SetUp]
public void Setup ()
{
sl = new SpinLock (true);
}
[Test, ExpectedException (typeof (LockRecursionException))]
public void RecursionExceptionTest ()
{
sl = new SpinLock (true);
bool taken = false, taken2 = false;
sl.Enter (ref taken);
Assert.IsTrue (taken, "#1");
sl.Enter (ref taken2);
}
[Test]
public void SimpleEnterExitSchemeTest ()
{
bool taken = false;
for (int i = 0; i < 50000; i++) {
sl.Enter (ref taken);
Assert.IsTrue (taken, "#" + i.ToString ());
sl.Exit ();
taken = false;
}
}
[Test]
public void SemanticCorrectnessTest ()
{
sl = new SpinLock (false);
bool taken = false;
bool taken2 = false;
sl.Enter (ref taken);
Assert.IsTrue (taken, "#1");
sl.TryEnter (ref taken2);
Assert.IsFalse (taken2, "#2");
sl.Exit ();
sl.TryEnter (ref taken2);
Assert.IsTrue (taken2, "#3");
sl.Exit ();
Assert.IsFalse (sl.IsHeld);
}
[Test, ExpectedException (typeof (ArgumentException))]
public void FirstTakenParameterTest ()
{
bool taken = true;
sl.Enter (ref taken);
}
[Test, ExpectedException (typeof (ArgumentException))]
public void SecondTakenParameterTest ()
{
bool taken = true;
sl.TryEnter (ref taken);
}
internal class SpinLockWrapper
{
public SpinLock Lock = new SpinLock (false);
}
[Test]
[Category ("MultiThreaded")]
public void LockUnicityTest ()
{
ParallelTestHelper.Repeat (delegate {
int currentCount = 0;
bool fail = false;
SpinLockWrapper wrapper = new SpinLockWrapper ();
ParallelTestHelper.ParallelStressTest (wrapper, delegate {
bool taken = false;
wrapper.Lock.Enter (ref taken);
int current = currentCount++;
if (current != 0)
fail = true;
SpinWait sw = new SpinWait ();
for (int i = 0; i < 200; i++)
sw.SpinOnce ();
currentCount -= 1;
wrapper.Lock.Exit ();
}, 4);
Assert.IsFalse (fail);
}, 5);
}
[Test]
public void IsHeldByCurrentThreadTest ()
{
bool lockTaken = false;
sl.Enter (ref lockTaken);
Assert.IsTrue (lockTaken, "#1");
Assert.IsTrue (sl.IsHeldByCurrentThread, "#2");
lockTaken = false;
sl = new SpinLock (true);
sl.Enter (ref lockTaken);
Assert.IsTrue (lockTaken, "#3");
Assert.IsTrue (sl.IsHeldByCurrentThread, "#4");
}
}
}
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