/// <summary>
/// Claim the next sequence in the <see cref="Sequencer"/>
/// The caller should be held up until the claimed sequence is available by tracking the dependentSequences.
/// </summary>
/// <param name="dependentSequences">dependentSequences to be checked for range.</param>
/// <returns>the index to be used for the publishing.</returns>
public long IncrementAndGet(Sequence[] dependentSequences)
{
MutableLong minGatingSequence = _minGatingSequenceThreadLocal.Value;
WaitForCapacity(dependentSequences, minGatingSequence);
long nextSequence = _claimSequence.IncrementAndGet();
WaitForFreeSlotAt(nextSequence, dependentSequences, minGatingSequence);
return(nextSequence);
}
private void WaitForFreeSlotAt(long sequence, Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = sequence - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
//TODO LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private void WaitForCapacity(Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = (_claimSequence.Value + 1L) - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
//TODO LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private void WaitForFreeSlotAt(long sequence, Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = sequence - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
var spinWait = default(SpinWait);
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
spinWait.SpinOnce(); //Java version uses LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private void WaitForCapacity(Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = (_claimSequence.ReadFullFence() + 1L) - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence;
var spinWait = default(SpinWait);
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
spinWait.SpinOnce(); //LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private bool HasAvailableCapacity(long sequence, int availableCapacity, Sequence[] dependentSequences)
{
long wrapPoint = (sequence + availableCapacity) - _bufferSize;
MutableLong minGatingSequence = _minGatingSequenceThreadLocal.Value;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence = Util.GetMinimumSequence(dependentSequences);
minGatingSequence.Value = minSequence;
if (wrapPoint > minSequence)
{
return(false);
}
}
return(true);
}
/// <summary>
/// Is there available capacity in the buffer for the requested sequence.
/// </summary>
/// <param name="availableCapacity">availableCapacity remaining in the buffer.</param>
/// <param name="dependentSequences">dependentSequences to be checked for range.</param>
/// <returns>true if the buffer has capacity for the requested sequence.</returns>
public bool HasAvailableCapacity(int availableCapacity, Sequence[] dependentSequences)
{
long wrapPoint = (_claimSequence.ReadFullFence() + availableCapacity) - _bufferSize;
MutableLong minGatingSequence = _minGatingSequenceThreadLocal.Value;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence = Util.GetMinimumSequence(dependentSequences);
minGatingSequence.Value = minSequence;
if (wrapPoint > minSequence)
{
return(false);
}
}
return(true);
}
private void WaitForFreeSlotAt(long sequence, Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = sequence - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
//TODO LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private void WaitForCapacity(Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = (_claimSequence.Value + 1L) - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
//TODO LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private void WaitForFreeSlotAt(long sequence, Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = sequence - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
var spinWait = default(SpinWait);
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
spinWait.SpinOnce(); //Java version uses LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
private void WaitForCapacity(Sequence[] dependentSequences, MutableLong minGatingSequence)
{
long wrapPoint = (_claimSequence.ReadFullFence() + 1L) - _bufferSize;
if (wrapPoint > minGatingSequence.Value)
{
long minSequence;
var spinWait = default(SpinWait);
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
spinWait.SpinOnce(); //LockSupport.parkNanos(1L);
}
minGatingSequence.Value = minSequence;
}
}
