public void Exchange()
{
AtomicReferenceArray <T> ai = new AtomicReferenceArray <T>(DEFAULT_COLLECTION_SIZE);
for (int i = 0; i < DEFAULT_COLLECTION_SIZE; ++i)
{
ai.Exchange(i, one);
Assert.AreEqual(one, ai.Exchange(i, zero));
Assert.AreEqual(zero, ai.Exchange(i, m10));
Assert.AreEqual(m10, ai.Exchange(i, one));
}
}
public void IndexerChokesOnOutOfRangeIndex()
{
AtomicReferenceArray <T> ai = new AtomicReferenceArray <T>(DEFAULT_COLLECTION_SIZE);
T a = null;
TestHelper.AssertException <IndexOutOfRangeException>(
delegate { a = ai[DEFAULT_COLLECTION_SIZE]; });
TestHelper.AssertException <IndexOutOfRangeException>(
delegate { a = ai[-1]; });
TestHelper.AssertException <IndexOutOfRangeException>(
delegate { ai.Exchange(DEFAULT_COLLECTION_SIZE, zero); });
TestHelper.AssertException <IndexOutOfRangeException>(
delegate { ai.Exchange(-1, zero); });
Assert.IsNull(a);
}
public void CompareExistingValueAndSetNewValue()
{
AtomicReferenceArray <T> ai = new AtomicReferenceArray <T>(DEFAULT_COLLECTION_SIZE);
for (int i = 0; i < DEFAULT_COLLECTION_SIZE; ++i)
{
ai.Exchange(i, one);
Assert.IsTrue(ai.CompareAndSet(i, one, two));
Assert.IsTrue(ai.CompareAndSet(i, two, m4));
Assert.AreEqual(m4, ai[i]);
Assert.IsFalse(ai.CompareAndSet(i, m5, seven));
Assert.IsFalse((seven.Equals(ai[i])));
Assert.IsTrue(ai.CompareAndSet(i, m4, seven));
Assert.AreEqual(seven, ai[i]);
}
}
public void CompareAndSetInMultipleThreads()
{
AtomicReferenceArray <T> a = new AtomicReferenceArray <T>(1);
a.Exchange(0, one);
Thread t = ThreadManager.StartAndAssertRegistered(
"T1", () => { while (!a.CompareAndSet(0, two, three))
{
Thread.Sleep(Delays.Short);
}
});
Assert.IsTrue(a.CompareAndSet(0, one, two));
ThreadManager.JoinAndVerify(Delays.Long);
Assert.IsFalse(t.IsAlive);
Assert.AreEqual(a[0], three);
}
public void WeakCompareAndSet()
{
AtomicReferenceArray <T> ai = new AtomicReferenceArray <T>(DEFAULT_COLLECTION_SIZE);
for (int i = 0; i < DEFAULT_COLLECTION_SIZE; ++i)
{
ai.Exchange(i, one);
while (!ai.WeakCompareAndSet(i, one, two))
{
}
while (!ai.WeakCompareAndSet(i, two, m4))
{
}
Assert.AreEqual(m4, ai[i]);
while (!ai.WeakCompareAndSet(i, m4, seven))
{
}
Assert.AreEqual(seven, ai[i]);
}
}
public void SerializeAndDeserialize()
{
AtomicReferenceArray <T> atomicReferenceArray = new AtomicReferenceArray <T>(DEFAULT_COLLECTION_SIZE);
for (int i = 0; i < DEFAULT_COLLECTION_SIZE; ++i)
{
atomicReferenceArray.Exchange(i, TestData <T> .MakeData(-i));
}
MemoryStream bout = new MemoryStream(10000);
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(bout, atomicReferenceArray);
MemoryStream bin = new MemoryStream(bout.ToArray());
BinaryFormatter formatter2 = new BinaryFormatter();
AtomicReferenceArray <T> r = (AtomicReferenceArray <T>)formatter2.Deserialize(bin);
Assert.AreEqual(atomicReferenceArray.Count, r.Count);
for (int i = 0; i < DEFAULT_COLLECTION_SIZE; ++i)
{
Assert.AreEqual(r[i], atomicReferenceArray[i]);
}
}
/// <summary>
/// Atomically sets the element at position <paramref name="index"/> to <paramref name="newValue"/>
/// and returns the old value.
/// </summary>
/// <param name="index">
/// Ihe index
/// </param>
/// <param name="newValue">
/// The new value
/// </param>
public T Exchange(int index, T newValue)
{
return(_atomicReferenceArray.Exchange(index, new ValueHolder <T>(newValue)).Value);
}
