public void TestNoInit()
{
int x = 0;
var init = DeferredInitializer.Create(() => x = 3);
Assert.AreEqual(x, 0);
Assert.IsFalse(init.HasInitialized);
}
/// <summary>
/// Creates a type that is the decoded version of a node.
/// </summary>
/// <param name="node">The node to decode.</param>
/// <param name="decoder">The decoder to use.</param>
internal IrType(LNode node, DecoderState decoder)
: base(node, decoder)
{
var typeParamDecoder = decoder.WithScope(new TypeParent(this));
this.genericParameterCache = new Lazy <IReadOnlyList <IGenericParameter> >(() =>
node.Args[1].Args.EagerSelect(typeParamDecoder.DecodeGenericParameterDefinition));
this.baseTypeCache = new Lazy <IReadOnlyList <IType> >(() =>
node.Args[2].Args.EagerSelect(decoder.DecodeType));
this.initializer = DeferredInitializer.Create(DecodeMembers);
}
public void TestSimpleInit()
{
int x = 0;
var init = DeferredInitializer.Create(() => x = 3);
Assert.IsFalse(init.HasInitialized);
init.Initialize();
Assert.AreEqual(x, 3);
Assert.IsTrue(init.HasInitialized);
x = 0;
init.Initialize();
Assert.AreEqual(x, 0);
Assert.IsTrue(init.HasInitialized);
}
/// <summary>
/// Creates a Flame IR assembly from an appropriately-encoded
/// LNode.
/// </summary>
/// <param name="node">The node to decode.</param>
/// <param name="decoder">The decoder to use.</param>
public IrAssembly(LNode node, DecoderState decoder)
: base(node, decoder)
{
this.typeInitializer = DeferredInitializer.Create(() => {
var newResolver = decoder.TypeResolver.CreateMutableCopy();
var newDecoder = new DecoderState(
decoder.Log,
newResolver.ReadOnlyView,
decoder.Codec)
.WithScope(new TypeParent(this));
this.typeCache = this.Node.Args[1].Args.EagerSelect(newDecoder.DecodeTypeDefinition);
newResolver.AddAssembly(this);
});
}
public void RecursiveInit()
{
var integer = new Box <int>(0);
DeferredInitializer init;
// This test makes sure that Initialize() does not recurse:
// calling Initialize() from Initialize() does nothing at all.
// This is by design, because it allows initialization to touch
// other things that require initialization.
init = DeferredInitializer.Create <Box <int> >(
integer,
x => { x.Value++; init.Initialize(); });
Assert.IsFalse(init.HasInitialized);
init.Initialize();
Assert.IsTrue(init.HasInitialized);
Assert.AreEqual(integer.Value, 1);
}
public void TestMultithreadedInit()
{
for (int j = 0; j < 10; j++)
{
var integer = new Box <int>(0);
var init = DeferredInitializer.Create <Box <int> >(integer, x => x.Value++);
Assert.IsFalse(init.HasInitialized);
var tasks = new List <Task>();
for (int i = 0; i < 20; i++)
{
tasks.Add(Task.Run(() => init.Initialize()));
}
Task.WaitAll(tasks.ToArray());
Assert.IsTrue(init.HasInitialized);
Assert.AreEqual(integer.Value, 1);
}
}
/// <summary>
/// Creates a deferred initializer object from an initializer
/// function that is run in a single-threaded fashion with
/// respect to other functions operating on this assembly.
/// </summary>
/// <param name="func">
/// The initialization function to run synchronously.
/// </param>
/// <returns>
/// A deferred initializer object.
/// </returns>
public DeferredInitializer CreateSynchronizedInitializer(Action func)
{
return(DeferredInitializer.Create(() => RunSynchronized(func)));
}