Пример #1
0
            public void MoveNext()
            {
                int result;

                try
                {
                    bool doFinallyBodies = true;
                    int  tmpState        = state;

                    // Effectively a three way switch: 1, -1, 0
                    if (tmpState != 1)
                    {
                        if (state == -1)
                        {
                            return;
                        }
                        this.writer = File.CreateText("output.txt");
                    }
                    try
                    {
                        tmpState = state;
                        if (tmpState == 1)
                        {
                            goto Label_ResumePoint;
                        }
                        sum = 0;
                        i   = 0;
Label_ResumePoint:      // This shouldn't quite be here... see below
                        while (i < loopCount)
                        {
                            // Not in generated code:
                            if (state == 1)
                            {
                                goto Label_ResumePoint2;
                            }
                            // Back to generated code

                            valueFetcher = Task.Factory.StartNew(() => 1);
                            j            = 0;

                            // Still not in the generated code, and still not quite right... we don't want the j test here
Label_ResumePoint2:
                            // Back to generated code again...
                            while (j < 3)
                            {
                                try
                                {
                                    // We want Label_ResumePoint to be here really
                                    tmpState = state;
                                    if (tmpState != 1)
                                    {
                                        Console.WriteLine("Awaiting...");
                                        awaiter = valueFetcher.GetAwaiter();
                                        if (!awaiter.IsCompleted)
                                        {
                                            state           = 1;
                                            doFinallyBodies = false;
                                            awaiter.OnCompleted(moveNextDelegate);
                                            return;
                                        }
                                    }
                                    else
                                    {
                                        state = 0;
                                    }
                                    int awaitResult = awaiter.GetResult();
                                    awaiter = new TaskAwaiter <int>();
                                    value   = awaitResult;
                                    writer.WriteLine("Got value {0}", value);
                                    sum += value;
                                    break;
                                }
                                catch (Exception)
                                {
                                    Console.WriteLine("Oops... retrying");
                                }
                                j++;
                            }
                            i++;
                        }
                        result = sum;
                    }
                    finally
                    {
                        if (doFinallyBodies && writer != null)
                        {
                            writer.Dispose();
                        }
                    }
                }
                catch (Exception e)
                {
                    state = -1;
                    builder.SetException(e);
                    return;
                }
                state = -1;
                builder.SetResult(result);
            }
Пример #2
0
            public void MoveNext()
            {
                int result;

                try
                {
                    int awaitResult1 = 0;
                    int awaitResult2 = 0;
                    int awaitResult3 = 0;
#pragma warning disable 0219 // doFinallyBodies is never used
                    bool doFinallyBodies = true;
#pragma warning restore
                    switch (state)
                    {
                    case 1:
                        break;

                    case 2:
                        goto Label_Awaiter2Continuation;

                    case 3:
                        goto Label_Awaiter3Continuation;

                    default:
                        if (state != -1)
                        {
                            task1 = Task.Factory.StartNew(() => 1);
                            task2 = Task.Factory.StartNew(() => 2);
                            task3 = Task.Factory.StartNew(() => 3);

                            awaiter1 = task1.GetAwaiter();
                            if (awaiter1.IsCompleted)
                            {
                                goto Label_GetAwaiter1Result;
                            }
                            state           = 1;
                            doFinallyBodies = false;
                            awaiter1.OnCompleted(moveNextDelegate);
                        }
                        return;
                    }
                    state = 0;
Label_GetAwaiter1Result:
                    awaitResult1 = awaiter1.GetResult();
                    awaiter1     = new TaskAwaiter <int>();

                    awaiter2 = task2.GetAwaiter();
                    if (awaiter2.IsCompleted)
                    {
                        goto Label_GetAwaiter2Result;
                    }
                    state           = 2;
                    doFinallyBodies = false;
                    awaiter2.OnCompleted(moveNextDelegate);
                    return;

Label_Awaiter2Continuation:
                    state = 0;
Label_GetAwaiter2Result:
                    awaitResult2 = awaiter2.GetResult();
                    awaiter2     = new TaskAwaiter <int>();

                    awaiter3 = task3.GetAwaiter();
                    if (awaiter3.IsCompleted)
                    {
                        goto Label_GetAwaiter3Result;
                    }
                    state           = 3;
                    doFinallyBodies = false;
                    awaiter3.OnCompleted(moveNextDelegate);
                    return;

Label_Awaiter3Continuation:
                    state = 0;
Label_GetAwaiter3Result:
                    awaitResult3 = awaiter3.GetResult();
                    awaiter3     = new TaskAwaiter <int>();

                    result = awaitResult1 + awaitResult2 + awaitResult3;
                }
                catch (Exception e)
                {
                    state = -1;
                    builder.SetException(e);
                    return;
                }
                state = -1;
                builder.SetResult(result);
            }