/// Internal implementation detail.
internal override void DoJob(ref Worker wr, Cont <T> aK)
{
Spin:
var state = this.State;
if (state == Locked)
{
goto Spin;
}
if (state != Interlocked.CompareExchange(ref this.State, Locked, state))
{
goto Spin;
}
if (state <= Empty)
{
goto EmptyOrDemand;
}
T value = this.Value;
this.Value = default(T); // Avoid memory leaks.
this.State = Empty;
aK.DoCont(ref wr, value);
return;
EmptyOrDemand:
WaitQueue.AddTaker(ref this.Takers, aK);
this.State = Demand;
}
/// Internal implementation detail.
internal override void DoJob(ref Worker wr, Cont <T> aK)
{
Spin:
var state = this.State;
if (state > Empty)
{
goto GotValue;
}
if (state < Empty)
{
goto Spin;
}
if (Empty != Interlocked.CompareExchange(ref this.State, Locked, Empty))
{
goto Spin;
}
WaitQueue.AddTaker(ref this.Takers, aK);
this.State = Empty;
return;
GotValue:
aK.DoCont(ref wr, this.Value);
return;
}
// Note that via selective communication it is possible for a job to offer
// to both give and take on the same channel simultaneously. So, both
// Givers and Takers queues must be maintained even though in many cases
// only one of them is non empty.
/// Internal implementation detail.
internal override void DoJob(ref Worker wr, Cont <T> xK)
{
TryNextGiver:
this.Lock.Enter();
var tail = this.Givers;
if (null != tail)
{
goto TryGiver;
}
WaitQueue.AddTaker(ref this.Takers, xK);
this.Lock.Exit();
return;
TryGiver:
var cursor = tail.Next;
if (tail == cursor)
{
this.Givers = null;
}
else
{
tail.Next = cursor.Next;
}
this.Lock.Exit();
var pkOther = cursor.Pick;
if (null == pkOther)
{
goto GotGiver;
}
TryPickOther:
var stOther = Pick.TryPick(pkOther);
if (stOther > 0)
{
goto TryNextGiver;
}
if (stOther < 0)
{
goto TryPickOther;
}
Pick.SetNacks(ref wr, cursor.Me, pkOther);
GotGiver:
var uK = cursor.Cont;
uK.Next = null;
Worker.Push(ref wr, uK);
xK.DoCont(ref wr, cursor.Value);
return;
}
/// Internal implementation detail.
internal override void DoJob(ref Worker wr, Cont <T> aK)
{
Spin:
var state = this.State;
if (state < Running)
{
goto Completed;
}
if (state == Locked)
{
goto Spin;
}
if (state != Interlocked.CompareExchange(ref this.State, Locked, state))
{
goto Spin;
}
if (state == Running)
{
goto Running;
}
var job = this.Readers as Cont;
var taker = new Taker <T>();
taker.Cont = aK;
taker.Next = taker;
this.Readers = taker;
this.State = Running;
job.DoWork(ref wr);
return;
Running:
WaitQueue.AddTaker(ref this.Readers, aK);
this.State = Running;
return;
Completed:
if (state == Completed)
{
aK.DoCont(ref wr, this.Value);
}
else
{
aK.DoHandle(ref wr, (this.Readers as Fail).exn);
}
}
/// Internal implementation detail.
internal override void TryAlt(ref Worker wr, int i, Pick pkSelf, Cont <T> aK)
{
Spin:
var state = this.State;
if (state == Locked)
{
goto Spin;
}
if (state != Interlocked.CompareExchange(ref this.State, Locked, state))
{
goto Spin;
}
if (state <= Empty)
{
goto EmptyOrDemand;
}
TryPick:
var stSelf = Pick.TryPick(pkSelf);
if (stSelf > 0)
{
goto AlreadyPicked;
}
if (stSelf < 0)
{
goto TryPick;
}
T value = this.Value;
this.Value = default(T);
this.State = Empty;
aK.DoCont(ref wr, value);
return;
AlreadyPicked:
this.State = Full;
return;
EmptyOrDemand:
WaitQueue.AddTaker(ref this.Takers, i, pkSelf, aK);
this.State = Demand;
aK.TryNext(ref wr, i + 1, pkSelf);
return;
}
/// Internal implementation detail.
internal override void DoJob(ref Worker wr, Cont <T> aK)
{
this.Lock.Enter();
if (this.Values.Count > 0)
{
goto GotValue;
}
WaitQueue.AddTaker(ref this.Takers, aK);
this.Lock.Exit();
return;
GotValue:
T value = this.Values.Dequeue();
this.Lock.Exit();
aK.DoCont(ref wr, value);
return;
}
/// Internal implementation detail.
internal override void TryAlt(ref Worker wr, int i, Pick pkSelf, Cont <T> aK)
{
Spin:
var state = this.State;
if (state > Empty)
{
goto TryPick;
}
if (state < Empty)
{
goto Spin;
}
if (Empty != Interlocked.CompareExchange(ref this.State, Locked, Empty))
{
goto Spin;
}
WaitQueue.AddTaker(ref this.Takers, i, pkSelf, aK);
this.State = Empty;
aK.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);
aK.DoCont(ref wr, this.Value);
AlreadyPicked:
return;
}
/// Internal implementation detail.
internal override void TryAlt(ref Worker wr, int i, Pick pkSelf, Cont <T> aK)
{
this.Lock.Enter();
if (this.Values.Count > 0)
{
goto GotValue;
}
WaitQueue.AddTaker(ref this.Takers, i, pkSelf, aK);
this.Lock.Exit();
aK.TryNext(ref wr, i + 1, pkSelf);
return;
GotValue:
var stSelf = Pick.TryPick(pkSelf);
if (stSelf > 0)
{
goto AlreadyPicked;
}
if (stSelf < 0)
{
goto GotValue;
}
T value = this.Values.Dequeue();
this.Lock.Exit();
Pick.SetNacks(ref wr, i, pkSelf);
aK.DoCont(ref wr, value);
return;
AlreadyPicked:
this.Lock.Exit();
return;
}
/// 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 <T> aK)
{
Spin:
var state = this.State;
if (state < Running)
{
goto Completed;
}
if (state == Locked)
{
goto Spin;
}
if (state != Interlocked.CompareExchange(ref this.State, Locked, state))
{
goto Spin;
}
if (state == Running)
{
goto Running;
}
var job = this.Readers as Cont;
var taker = new Taker <T>();
taker.Me = i;
taker.Pick = pkSelf;
taker.Cont = aK;
taker.Next = taker;
this.Readers = taker;
this.State = Running;
Worker.Push(ref wr, job);
aK.TryNext(ref wr, i + 1, pkSelf);
return;
Running:
WaitQueue.AddTaker(ref this.Readers, i, pkSelf, aK);
this.State = Running;
aK.TryNext(ref wr, i + 1, pkSelf);
return;
Completed:
var stSelf = Pick.TryPick(pkSelf);
if (stSelf > 0)
{
goto AlreadyPicked;
}
if (stSelf < 0)
{
goto Completed;
}
Pick.SetNacks(ref wr, i, pkSelf);
if (state == Completed)
{
aK.DoCont(ref wr, this.Value);
}
else
{
aK.DoHandle(ref wr, (this.Readers as Fail).exn);
}
AlreadyPicked:
return;
}
