/// Internal implementation detail.
internal override void TryAlt(ref Worker wr, int i, Pick pkSelf, Cont <T> xK)
{
this.Lock.Enter();
var tail = this.Givers;
if (null == tail)
{
goto TryTaker;
}
Giver <T> cache = null;
var cursor = tail.Next;
TryGiver:
var giver = cursor;
cursor = cursor.Next;
var pkOther = giver.Pick;
if (null == pkOther)
{
goto TryPickSelf;
}
if (pkOther == pkSelf)
{
goto OtherIsSelf;
}
TryPickOther:
var stOther = Pick.TryClaim(pkOther);
if (stOther > 0)
{
goto TryNextGiver;
}
if (stOther < 0)
{
goto TryPickOther;
}
TryPickSelf:
var stSelf = Pick.TryPick(pkSelf);
if (stSelf > 0)
{
goto SelfAlreadyPicked;
}
if (stSelf < 0)
{
goto BackOff;
}
//GotGiver:
WaitQueue.ReplaceRange(ref this.Givers, giver, cache);
this.Lock.Exit();
if (null != pkOther)
{
Pick.PickClaimed(pkOther);
Pick.SetNacks(ref wr, giver.Me, pkOther);
}
Pick.SetNacks(ref wr, i, pkSelf);
var uK = giver.Cont;
uK.Next = null;
Worker.Push(ref wr, uK);
xK.DoCont(ref wr, giver.Value);
return;
BackOff:
if (null == pkOther)
{
goto TryPickSelf;
}
Pick.Unclaim(pkOther);
goto TryPickOther;
OtherIsSelf:
WaitQueue.Enqueue(ref cache, giver);
if (giver != tail)
{
goto TryGiver;
}
this.Givers = cache;
goto TryTaker;
TryNextGiver:
if (giver != tail)
{
goto TryGiver;
}
this.Givers = cache;
TryTaker:
WaitQueue.AddTaker(ref this.Takers, i, pkSelf, xK);
this.Lock.Exit();
xK.TryNext(ref wr, i + 1, pkSelf);
return;
SelfAlreadyPicked:
if (null != pkOther)
{
Pick.Unclaim(pkOther);
}
WaitQueue.ReplaceRangeInclusive(this.Givers, giver, cache);
this.Lock.Exit();
return;
}
/// Internal implementation detail.
internal override void TryAlt(ref Worker wr, int i, Pick pkSelf, Cont <Unit> uK)
{
var ch = this.Ch;
ch.Lock.Enter();
var tail = ch.Takers;
if (null == tail)
{
goto TryGiver;
}
Cont <T> cache = null;
var cursor = tail.Next;
TryTaker:
var taker = cursor as Cont <T>;
cursor = cursor.Next;
int me = 0;
var pkOther = taker.GetPick(ref me);
if (null == pkOther)
{
goto TryPickSelf;
}
if (pkOther == pkSelf)
{
goto OtherIsSelf;
}
TryPickOther:
var stOther = Pick.TryClaim(pkOther);
if (stOther > 0)
{
goto TryNextTaker;
}
if (stOther < 0)
{
goto TryPickOther;
}
TryPickSelf:
var stSelf = Pick.TryPick(pkSelf);
if (stSelf > 0)
{
goto SelfAlreadyPicked;
}
if (stSelf < 0)
{
goto BackOff;
}
//GotTaker:
WaitQueue.ReplaceRange(ref ch.Takers, taker, cache);
ch.Lock.Exit();
if (null != pkOther)
{
Pick.PickClaimed(pkOther);
Pick.SetNacks(ref wr, me, pkOther);
//taker = (taker as Taker<T>).Cont;
}
Pick.SetNacks(ref wr, i, pkSelf);
taker.Value = this.X;
taker.Next = null;
Worker.Push(ref wr, taker);
uK.DoCont(ref wr, null);
return;
BackOff:
if (null == pkOther)
{
goto TryPickSelf;
}
Pick.Unclaim(pkOther);
goto TryPickOther;
OtherIsSelf:
WaitQueue.Enqueue(ref cache, taker);
if (taker != tail)
{
goto TryTaker;
}
ch.Takers = cache;
goto TryGiver;
TryNextTaker:
if (taker != tail)
{
goto TryTaker;
}
ch.Takers = cache;
TryGiver:
WaitQueue.AddGiver(ref ch.Givers, this.X, i, pkSelf, uK);
ch.Lock.Exit();
uK.TryNext(ref wr, i + 1, pkSelf);
return;
SelfAlreadyPicked:
if (null != pkOther)
{
Pick.Unclaim(pkOther);
}
WaitQueue.ReplaceRangeInclusive(ch.Takers, taker, cache);
ch.Lock.Exit();
return;
}