public void TestParallelAmr()
{
var random = new Random((int)DateTime.Now.Ticks & 0x0000ffff);
for (var j = 0; j < 50; j++)
{
var orders = new HashedMap <Order, bool>(10, new OrderEqualityComparer());
var orderRef = new Order {
Id = -1, Name = "-1"
};
var markedOrder = new AtomicMarkableReference <Order>(orderRef, false);
for (var i = 0; i < 10; i++)
{
var order = new Order {
Id = i, Name = i.ToString()
};
var marked = (random.Next() % 2) == 1;
orders.Add(order, marked);
}
var results = new bool[10];
Parallel.ForEach(orders, x =>
{
var rand = 0;
lock (locker)
{
rand = random.Next() % 20;
}
Thread.Sleep(rand);
var result = markedOrder.CompareExchange(orderRef, false, x.Key, x.Value);
lock (locker)
{
results[x.Key.Id] = result;
}
});
Assert.Equal(orders[markedOrder.Value], markedOrder.IsMarked);
for (var i = 0; i < 10; i++)
{
if (i != markedOrder.Value.Id)
{
Assert.False(results[i]);
}
else
{
Assert.True(results[i]);
}
}
}
}
public void TestAmrCasWithSameMark()
{
var order = new Order {
Id = 1, Name = "1"
};
var amr = new AtomicMarkableReference <Order>(order);
Assert.Same(order, amr.Value);
Assert.Equal(1, amr.Value.Id);
Assert.Equal("1", amr.Value.Name);
Assert.False(amr.IsMarked);
var newOrder = new Order {
Id = 2, Name = "2"
};
Assert.True(amr.CompareExchange(order, false, newOrder, false));
Assert.Same(newOrder, amr.Value);
Assert.Equal(2, amr.Value.Id);
Assert.Equal("2", amr.Value.Name);
}