示例#1
0
        internal override void TryAlt(ref Worker wr, int i, Cont <X> xK, Else xE)
        {
            var pk = xE.pk;
            var nk = Pick.ClaimAndAddNack(pk, i);

            if (null != nk)
            {
                var      cts = new CancellationTokenSource();
                Task <X> xT;
                try {
                    xT = this.Start(cts.Token);
                } catch (Exception e) {
                    Pick.PickClaimedAndSetNacks(ref wr, i, pk);
                    cts.Dispose();
                    Handler.DoHandle(xK, ref wr, e);
                    return;
                }
                if (TaskStatus.RanToCompletion == xT.Status)
                {
                    Pick.PickClaimedAndSetNacks(ref wr, i, pk);
                    cts.Dispose();
                    Cont.Do(xK, ref wr, xT.Result);
                }
                else
                {
                    var state = new TaskToAltAwaiter <X>(cts, pk, i, xT, xK, wr.Scheduler);
                    nk.UnsafeAddReader(state);
                    Pick.Unclaim(pk);
                    var j = i + 1;
                    nk.I1 = j;
                    xT.ConfigureAwait(false).GetAwaiter().UnsafeOnCompleted(state.Ready);
                    xE.TryElse(ref wr, j);
                }
            }
        }
示例#2
0
        internal override void TryAlt(ref Worker wr, int i, Cont <X> xK, Else xE)
        {
            var pk = xE.pk;
            var cb = new AltCallback <X>(wr.Scheduler, this, xK, pk, -1);
            var nk = Pick.ClaimAndAddNack(pk, i);

            if (null != nk)
            {
                try {
                    cb.iar = DoBegin(StaticData.workAsyncCallback, cb);
                } catch (Exception e) {
                    Pick.PickClaimedAndSetNacks(ref wr, i, pk);
                    Handler.DoHandle(xK, ref wr, e);
                    return;
                }
                var m = cb.me;
                if (0 <= m || m != Interlocked.CompareExchange(ref cb.me, i, m))
                {
                    Pick.PickClaimedAndSetNacks(ref wr, i, pk);
                    Cont.Do(xK, ref wr, DoEnd(cb.iar));
                }
                else
                {
                    nk.UnsafeAddReader(cb);
                    Pick.Unclaim(pk);
                    var j = i + 1;
                    nk.I1 = j;
                    xE.TryElse(ref wr, j);
                }
            }
        }