void IAsyncStateMachine.MoveNext()
{
int result = default(int);
try
{
bool doFinallyBodies = true;
switch (state)
{
case -3:
goto Done;
case 0:
goto FirstAwaitContinuation;
case 1:
goto SecondAwaitContinuation;
}
// Default case - first call (state is -1)
total = 0;
iterator = text.GetEnumerator();
// We really want to jump straight to FirstAwaitRealContinuation, but we can't
// goto a label inside a try block...
FirstAwaitContinuation:
// foreach loop
try
{
// for/foreach loops typically have the condition at the end of the generated code.
// We want to go there *unless* we're trying to reach the first continuation.
if (state != 0)
{
goto LoopCondition;
}
goto FirstAwaitRealContinuation;
LoopBody:
ch = iterator.Current;
unicode = ch;
TaskAwaiter localTaskAwaiter = Task.Delay(unicode).GetAwaiter();
if (localTaskAwaiter.IsCompleted)
{
goto FirstAwaitCompletion;
}
state = 0;
taskAwaiter = localTaskAwaiter;
builder.AwaitUnsafeOnCompleted(ref localTaskAwaiter, ref this);
doFinallyBodies = false;
return;
FirstAwaitRealContinuation:
localTaskAwaiter = taskAwaiter;
taskAwaiter = default(TaskAwaiter);
state = -1;
FirstAwaitCompletion:
localTaskAwaiter.GetResult();
localTaskAwaiter = default(TaskAwaiter);
total += unicode;
LoopCondition:
if (iterator.MoveNext())
{
goto LoopBody;
}
}
finally
{
if (doFinallyBodies && iterator != null)
{
iterator.Dispose();
}
}
// After the loop
YieldAwaitable.YieldAwaiter localYieldAwaiter = Task.Yield().GetAwaiter();
if (localYieldAwaiter.IsCompleted)
{
goto SecondAwaitCompletion;
}
state = 1;
yieldAwaiter = localYieldAwaiter;
builder.AwaitUnsafeOnCompleted(ref localYieldAwaiter, ref this);
doFinallyBodies = false;
return;
SecondAwaitContinuation:
localYieldAwaiter = yieldAwaiter;
yieldAwaiter = default(YieldAwaitable.YieldAwaiter);
state = -1;
SecondAwaitCompletion:
localYieldAwaiter.GetResult();
localYieldAwaiter = default(YieldAwaitable.YieldAwaiter);
result = total;
}
catch (Exception ex)
{
state = -2;
builder.SetException(ex);
return;
}
Done:
state = -2;
builder.SetResult(result);
}
public void IsCompleted()
{
Assert.IsFalse(a.IsCompleted, "#1");
a.GetResult();
Assert.IsFalse(a.IsCompleted, "#1");
}
public void GetResult() => _awaiter.GetResult();
public void MoveNext()
{
int result;
try
{
Action continuation;
TaskAwaiter localTaskAwaiter;
YieldAwaitable.YieldAwaiter[] yieldAwaiterArray;
bool doFinallyBodies = true;
switch (this.state)
{
case 1:
break;
case 2:
goto Await2CompletedTrampoline1;
case 3:
goto Await3Completed;
default:
if (this.state != -1)
{
Console.WriteLine("Bit tired. Taking a rest...");
localTaskAwaiter = Task.Delay(1000).GetAwaiter();
if (localTaskAwaiter.IsCompleted)
{
goto Await1Completed;
}
this.state = 1;
TaskAwaiter[] taskAwaiterArray = { localTaskAwaiter };
this.awaiter = taskAwaiterArray;
continuation = this.MoveNextDelegate;
if (continuation == null)
{
// Force the task to be created before there's any possible race.
Task <int> task = this.builder.Task;
continuation = MoveNext;
// Careful here: set the continuation field in the boxed copy.
((IStateMachine)continuation.Target).SetMoveNextDelegate(continuation);
}
taskAwaiterArray[0].OnCompleted(continuation);
doFinallyBodies = false;
}
return;
}
// For state == 1, i.e. continuing from first await
localTaskAwaiter = ((TaskAwaiter[])this.awaiter)[0];
this.awaiter = null;
this.state = 0;
Await1Completed:
localTaskAwaiter.GetResult();
localTaskAwaiter = default(TaskAwaiter);
this.total = 0;
this.rng = new Random();
this.outerLogFrame = new LogFrame("Outside loop");
// We can't jump into the middle of a try block...
Await2CompletedTrampoline1:
try
{
int localState = this.state;
bool fakeTrampoline2 = false;
if (localState == 2)
{
// Can't actually do this...
// goto Await2CompletedTrampoline2;
// So let's fake it...
fakeTrampoline2 = true;
}
if (!fakeTrampoline2)
{
this.i = 0;
}
while (fakeTrampoline2 || i < this.count)
{
if (!fakeTrampoline2)
{
this.innerLogFrame = new LogFrame("Inside loop");
}
fakeTrampoline2 = false;
// We still can't jump into the middle of a try block...
// The C# compiler can generate code to jump here, but it's not
// valid C#...
// Await2CompletedTrampoline2:
try
{
int totalBefore = 0; // Initialization isn't present in IL, but I believe it's implicit...
TaskAwaiter <int> localTaskInt32Awaiter;
localState = this.state;
// Can only be because state = 0, i.e. we've gone back to the top of the loop
if (localState != 2)
{
localTaskInt32Awaiter = GeneratedProgram.WaitAndReturnRandomNumber(this.rng).GetAwaiter();
if (!localTaskInt32Awaiter.IsCompleted)
{
totalBefore = total;
this.stack = totalBefore; // Unclear why we need this...
this.state = 2;
TaskAwaiter <int>[] taskInt32AwaiterArray = { localTaskInt32Awaiter };
this.awaiter = taskInt32AwaiterArray;
continuation = this.MoveNextDelegate;
if (continuation == null)
{
// Force the task to be created before there's any possible race.
Task <int> task = this.builder.Task;
continuation = MoveNext;
// Careful here: set the continuation field in the boxed copy.
((IStateMachine)continuation.Target).SetMoveNextDelegate(continuation);
}
taskInt32AwaiterArray[0].OnCompleted(continuation);
doFinallyBodies = false;
return;
}
}
else
{
// Trampolined in from the continuation in state 2
totalBefore = (int)this.stack;
this.stack = null;
localTaskInt32Awaiter = ((TaskAwaiter <int>[]) this.awaiter)[0];
this.awaiter = null;
this.state = 0;
}
int localTaskInt32Result = localTaskInt32Awaiter.GetResult();
localTaskInt32Awaiter = default(TaskAwaiter <int>);
totalBefore += localTaskInt32Result;
this.total = totalBefore;
}
finally
{
if (doFinallyBodies && this.innerLogFrame != null)
{
this.innerLogFrame.Dispose();
}
}
this.i++;
}
}
finally
{
if (doFinallyBodies && this.outerLogFrame != null)
{
this.outerLogFrame.Dispose();
}
}
Console.WriteLine("Finished looping. Will just yield for fun.");
YieldAwaitable.YieldAwaiter localYieldAwaiter = Task.Yield().GetAwaiter();
if (localYieldAwaiter.IsCompleted)
{
goto Await3CompletedImmediately;
}
this.state = 3;
yieldAwaiterArray = new YieldAwaitable.YieldAwaiter[] { localYieldAwaiter };
this.awaiter = yieldAwaiterArray;
continuation = this.MoveNextDelegate;
if (continuation == null)
{
// Force the task to be created before there's any possible race.
Task <int> task = this.builder.Task;
continuation = MoveNext;
// Careful here: set the continuation field in the boxed copy.
((IStateMachine)continuation.Target).SetMoveNextDelegate(continuation);
}
yieldAwaiterArray[0].OnCompleted(continuation);
doFinallyBodies = false;
return;
Await3Completed:
localYieldAwaiter = ((YieldAwaitable.YieldAwaiter[]) this.awaiter)[0];
this.awaiter = null;
this.state = 0;
Await3CompletedImmediately:
localYieldAwaiter.GetResult();
localYieldAwaiter = default(YieldAwaitable.YieldAwaiter);
result = this.total;
}
catch (Exception e)
{
this.state = -1;
this.builder.SetException(e);
return;
}
this.state = -1;
this.builder.SetResult(result);
}