internal override void DoJob(ref Worker wr, Cont <Unit> uK)
{
Spin:
var state = this.State;
if (state > Initial)
{
goto Signaled;
}
if (state < Initial)
{
goto Spin;
}
if (Initial != Interlocked.CompareExchange(ref this.State, ~state, state))
{
goto Spin;
}
WaitQueue.AddTaker(ref this.Takers, uK);
this.State = Initial;
return;
Signaled:
Work.Do(uK, ref wr);
}
internal static void Signal(ref Worker wr, Nack nk)
{
Spin:
var state = nk.State;
if (state < Delayed)
{
goto Spin;
}
if (Running != Interlocked.CompareExchange(ref nk.State, state + 1, state))
{
goto Spin;
}
WaitQueue.PickReaders(ref nk.Readers, null, ref wr);
}
internal override void TryAlt(ref Worker wr, int i, Cont <Unit> uK, Else uE)
{
var pkSelf = uE.pk;
Spin:
var state = this.State;
if (state > Initial)
{
goto TryPick;
}
if (state < Initial)
{
goto Spin;
}
if (Initial != Interlocked.CompareExchange(ref this.State, ~state, state))
{
goto Spin;
}
WaitQueue.AddTaker(ref this.Takers, i, pkSelf, uK);
this.State = Initial;
uE.TryElse(ref wr, i + 1);
return;
TryPick:
var st = Pick.TryPick(pkSelf);
if (st > 0)
{
goto AlreadyPicked;
}
if (st < 0)
{
goto TryPick;
}
Pick.SetNacks(ref wr, i, pkSelf);
Work.Do(uK, ref wr);
AlreadyPicked:
return;
}
/// <summary>Internal implementation detail.</summary>
internal override void TryAlt(ref Worker wr, int i, Pick pkSelf, Cont <Unit> uK)
{
Spin:
var state = this.State;
if (state > Initial)
{
goto TryPick;
}
if (state < Initial)
{
goto Spin;
}
if (Initial != Interlocked.CompareExchange(ref this.State, Locked, Initial))
{
goto Spin;
}
WaitQueue.AddTaker(ref this.Takers, i, pkSelf, uK);
this.State = Initial;
uK.TryNext(ref wr, i + 1, pkSelf);
return;
TryPick:
var st = Pick.TryPick(pkSelf);
if (st > 0)
{
goto AlreadyPicked;
}
if (st < 0)
{
goto TryPick;
}
Pick.SetNacks(ref wr, i, pkSelf);
uK.DoCont(ref wr, null);
AlreadyPicked:
return;
}