| public static GetMinimumSequence ( ISequence sequences, long minimum = long.MaxValue ) : long | ||
| sequences | ISequence | sequences to compare. |
| minimum | long | an initial default minimum. If the array is empty this value will returned. |
| return | long | |
public long RemainingCapacity()
{
long consumed = Util.GetMinimumSequence(_gatingSequences);
long produced = _cursor.Value;
return(BufferSize - (produced - consumed));
}
private bool HasAvailableCapacity(int requiredCapacity, bool doStore)
{
long nextValue = _nextValue;
long wrapPoint = (nextValue + requiredCapacity) - _bufferSize;
long cachedGatingSequence = _cachedValue;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > nextValue)
{
if (doStore)
{
_cursor.SetValueVolatile(nextValue);
}
long minSequence = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), nextValue);
_cachedValue = minSequence;
if (wrapPoint > minSequence)
{
return(false);
}
}
return(true);
}
internal long NextInternal(int n)
{
long current;
long next;
var spinWait = default(AggressiveSpinWait);
do
{
current = _cursor.Value;
next = current + n;
long wrapPoint = next - _bufferSize;
long cachedGatingSequence = _gatingSequenceCache.Value;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > current)
{
long gatingSequence = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), current);
if (wrapPoint > gatingSequence)
{
spinWait.SpinOnce();
continue;
}
_gatingSequenceCache.SetValue(gatingSequence);
}
else if (_cursor.CompareAndSet(current, next))
{
break;
}
} while (true);
return(next);
}
public long GetRemainingCapacity()
{
var consumed = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), _cursor.Value);
var produced = _cursor.Value;
return(BufferSize - (produced - consumed));
}
/// <summary>
/// Wait for the given sequence to be available
/// </summary>
/// <param name="sequence">sequence to be waited on.</param>
/// <param name="cursor">Ring buffer cursor on which to wait.</param>
/// <param name="dependents">dependents further back the chain that must advance first</param>
/// <param name="barrier">barrier the <see cref="IEventProcessor"/> is waiting on.</param>
/// <returns>the sequence that is available which may be greater than the requested sequence.</returns>
public long WaitFor(long sequence, Sequence cursor, Sequence[] dependents, ISequenceBarrier barrier)
{
long availableSequence;
var spinWait = default(SpinWait);
if (dependents.Length == 0)
{
while ((availableSequence = cursor.Value) < sequence) // volatile read
{
barrier.CheckAlert();
spinWait.SpinOnce();
if (spinWait.Count > 5000)
{
break;
}
}
}
else
{
while ((availableSequence = Util.GetMinimumSequence(dependents)) < sequence)
{
barrier.CheckAlert();
spinWait.SpinOnce();
if (spinWait.Count > 5000)
{
break;
}
}
}
return(availableSequence);
}
/// <summary>
/// Claim the next n events in sequence for publishing. This is for batch event producing. Using batch producing requires a little care and some math.
/// <code>
/// int n = 10;
/// long hi = sequencer.next(n);
/// long lo = hi - (n - 1);
/// for (long sequence = lo; sequence <= hi; sequence++) {
/// // Do work.
/// }
/// sequencer.publish(lo, hi);
/// </code>
/// </summary>
/// <param name="n">the number of sequences to claim</param>
/// <returns>the highest claimed sequence value</returns>
public override long Next(int n)
{
if (n < 1)
{
throw new ArgumentException("n must be > 0");
}
long nextValue = _fields.NextValue;
long nextSequence = nextValue + n;
long wrapPoint = nextSequence - _bufferSize;
long cachedGatingSequence = _fields.CachedValue;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > nextValue)
{
_cursor.SetValueVolatile(nextValue);
var spinWait = default(SpinWait);
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), nextValue)))
{
_waitStrategy.SignalAllWhenBlocking();
spinWait.SpinOnce(); // LockSupport.parkNanos(1L);
}
_fields.CachedValue = minSequence;
}
_fields.NextValue = nextSequence;
return(nextSequence);
}
public long WaitFor(IConsumer[] consumers, IRingBuffer <T> ringBuffer, IConsumerBarrier <T> barrier, long sequence)
{
long availableSequence;
if (0 == consumers.Length)
{
while ((availableSequence = ringBuffer.Cursor) < sequence)
{
if (barrier.IsAlerted())
{
throw AlertException.ALERT_EXCEPTION;
}
}
}
else
{
while ((availableSequence = Util.GetMinimumSequence(consumers)) < sequence)
{
if (barrier.IsAlerted())
{
throw AlertException.ALERT_EXCEPTION;
}
}
}
return(availableSequence);
}
public long NextInternal(int n)
{
long nextValue = _nextValue;
long nextSequence = nextValue + n;
long wrapPoint = nextSequence - _bufferSize;
long cachedGatingSequence = _cachedValue;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > nextValue)
{
_cursor.SetValueVolatile(nextValue);
var spinWait = default(AggressiveSpinWait);
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), nextValue)))
{
spinWait.SpinOnce();
}
_cachedValue = minSequence;
}
_nextValue = nextSequence;
return(nextSequence);
}
/// <summary>
/// Wait for the given sequence to be available with a timeout specified.
/// </summary>
/// <param name="sequence">sequence to be waited on.</param>
/// <param name="cursor">cursor on which to wait.</param>
/// <param name="dependents">dependents further back the chain that must advance first</param>
/// <param name="barrier">barrier the processor is waiting on.</param>
/// <param name="timeout">timeout value to abort after.</param>
/// <returns>the sequence that is available which may be greater than the requested sequence.</returns>
/// <exception cref="AlertException">AlertException if the status of the Disruptor has changed.</exception>
public long WaitFor(long sequence, Sequence cursor, Sequence[] dependents, ISequenceBarrier barrier, TimeSpan timeout)
{
long availableSequence;
var counter = SpinTries;
var sw = Stopwatch.StartNew();
if (dependents.Length == 0)
{
while ((availableSequence = cursor.Value) < sequence) // volatile read
{
counter = ApplyWaitMethod(barrier, counter);
if (sw.Elapsed > timeout)
{
break;
}
}
}
else
{
while ((availableSequence = Util.GetMinimumSequence(dependents)) < sequence)
{
counter = ApplyWaitMethod(barrier, counter);
if (sw.Elapsed > timeout)
{
break;
}
}
}
return(availableSequence);
}
/// <summary>
/// Wait for the given sequence to be available
/// </summary>
/// <param name="sequence">sequence to be waited on.</param>
/// <param name="cursor">Ring buffer cursor on which to wait.</param>
/// <param name="dependents">dependents further back the chain that must advance first</param>
/// <param name="barrier">barrier the <see cref="IEventProcessor"/> is waiting on.</param>
/// <returns>the sequence that is available which may be greater than the requested sequence.</returns>
public long WaitFor(long sequence, Sequence cursor, Sequence[] dependents, ISequenceBarrier barrier)
{
var availableSequence = cursor.Value; // volatile read
if (availableSequence < sequence)
{
Monitor.Enter(_gate);
try
{
++_numWaiters;
while ((availableSequence = cursor.Value) < sequence) // volatile read
{
barrier.CheckAlert();
Monitor.Wait(_gate);
}
}
finally
{
--_numWaiters;
Monitor.Exit(_gate);
}
}
if (dependents.Length != 0)
{
while ((availableSequence = Util.GetMinimumSequence(dependents)) < sequence)
{
barrier.CheckAlert();
}
}
return(availableSequence);
}
/// <summary>
/// Wait for the given sequence to be available with a timeout specified.
/// </summary>
/// <param name="sequence">sequence to be waited on.</param>
/// <param name="cursor">cursor on which to wait.</param>
/// <param name="dependents">dependents further back the chain that must advance first</param>
/// <param name="barrier">barrier the processor is waiting on.</param>
/// <param name="timeout">timeout value to abort after.</param>
/// <returns>the sequence that is available which may be greater than the requested sequence.</returns>
/// <exception cref="AlertException">AlertException if the status of the Disruptor has changed.</exception>
public long WaitFor(long sequence, Sequence cursor, Sequence[] dependents, ISequenceBarrier barrier, TimeSpan timeout)
{
long availableSequence;
var spinWait = new SpinWait();
var sw = Stopwatch.StartNew();
if (dependents.Length == 0)
{
while ((availableSequence = cursor.Value) < sequence) // volatile read
{
barrier.CheckAlert();
spinWait.SpinOnce();
if (sw.Elapsed > timeout)
{
break;
}
}
}
else
{
while ((availableSequence = Util.GetMinimumSequence(dependents)) < sequence)
{
barrier.CheckAlert();
spinWait.SpinOnce();
if (sw.Elapsed > timeout)
{
break;
}
}
}
return(availableSequence);
}
public override long RemainingCapacity()
{
var consumed = Util.GetMinimumSequence(sequencesRef.ReadFullFence(), cursor.Value);
var produced = cursor.Value;
return(GetBufferSize - (produced - consumed));
}
public override long Next(int n)
{
if (n < 1)
{
throw new ArgumentOutOfRangeException("n must be > 0");
}
SpinWait spinWait = new SpinWait();
long nextValue = this.nextValue;
long nextSequence = nextValue + n;
long wrapPoint = nextSequence - bufferSize;
long cachedGatingSequence = this.cachedValue;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > nextValue)
{
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(/*sequencesRef.ReadFullFence()*/ sequencesRef.ReadCompilerOnlyFence(), nextValue)))
{
spinWait.SpinOnce();
}
this.cachedValue = minSequence;
}
this.nextValue = nextSequence;
return(nextSequence);
}
public override long RemainingCapacity()
{
long nextValue = this.nextValue;
long consumed = Util.GetMinimumSequence(/*sequencesRef.ReadFullFence()*/ sequencesRef.ReadCompilerOnlyFence(), nextValue);
long produced = nextValue;
return(GetBufferSize - (produced - consumed));
}
/// <summary>
/// Get the remaining capacity for this sequencer. return The number of slots remaining.
/// </summary>
public override long GetRemainingCapacity()
{
var nextValue = _fields.NextValue;
var consumed = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), nextValue);
var produced = nextValue;
return(BufferSize - (produced - consumed));
}
private void EnsureConsumersAreInRange(long sequence)
{
while ((sequence - Util.GetMinimumSequence(_consumers)) >= _ringBuffer._entries.Length)
{
#if CSHARP30
Thread.Sleep(0);
#else
Thread.Yield();
#endif
}
}
private void NextInternalWrap(long nextValue, long wrapPoint)
{
_cursor.SetValueVolatile(nextValue);
var spinWait = default(AggressiveSpinWait);
long minSequence;
while (wrapPoint > (minSequence = Util.GetMinimumSequence(Volatile.Read(ref _gatingSequences), nextValue)))
{
spinWait.SpinOnce();
}
_cachedValue = minSequence;
}
private void WaitForFreeSlotAt(long sequence, Sequence[] dependentSequences)
{
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;
}
}
/// <summary>
/// Wait for the <see cref="RingBuffer{T}"/> to drain of published events then halt the workers.
/// </summary>
public void DrainAndHalt()
{
var workerSequences = GetWorkerSequences();
while (_ringBuffer.Cursor > Util.GetMinimumSequence(workerSequences))
{
Thread.Sleep(0);
}
foreach (var workProcessor in _workProcessors)
{
workProcessor.Halt();
}
_running = 0;
}
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;
}
}
/// <summary>
/// Wait for the <see cref="RingBuffer"/> to drain of published events then halt the workers.
/// </summary>
public void drainAndHalt()
{
var workerSequences = getWorkerSequences();
while (ringBuffer.GetCursor > Util.GetMinimumSequence(workerSequences))
{
Thread.Sleep(0);
}
foreach (WorkProcessor <T> processor in workProcessors)
{
processor.Halt();
}
started.WriteFullFence(false);
}
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 void WaitForFreeSlotAt(long sequence, Sequence[] dependentSequences)
{
long wrapPoint = sequence - _bufferSize;
if (wrapPoint > _minGatingSequence.ReadUnfenced())
{
long minSequence;
var spinWait = default(SpinWait);
while (wrapPoint > (minSequence = Util.GetMinimumSequence(dependentSequences)))
{
spinWait.SpinOnce(); // LockSupport.parkNanos(1L);
}
_minGatingSequence.WriteUnfenced(minSequence);
}
}
/// <summary>
/// Wait for the <see cref="RingBuffer{T}"/> to drain of published events then halt the workers.
/// </summary>
public void DrainAndHalt()
{
var workerSequences = WorkerSequences;
while (_ringBuffer.Cursor > Util.GetMinimumSequence(workerSequences))
{
Thread.Sleep(0);
}
for (int i = 0; i < _workProcessors.Length; i++)
{
var workProcessor = _workProcessors[i];
workProcessor.Halt();
}
_running.WriteFullFence(Stopped);
}
/// <summary>
/// Wait for the <see cref="RingBuffer{T}"/> to drain of published events then halt the workers.
/// </summary>
public void DrainAndHalt()
{
var workerSequences = WorkerSequences;
while (_ringBuffer.Cursor > Util.GetMinimumSequence(workerSequences))
{
Thread.Sleep(0);
}
for (int i = 0; i < _workProcessors.Length; i++)
{
var workProcessor = _workProcessors[i];
workProcessor.Halt();
}
_started.Value = false;
}
/// <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.ReadUnfenced() + availableCapacity) - _bufferSize;
if (wrapPoint > _minGatingSequence.ReadUnfenced())
{
long minSequence = Util.GetMinimumSequence(dependentSequences);
_minGatingSequence.WriteUnfenced(minSequence);
if (wrapPoint > minSequence)
{
return(false);
}
}
return(true);
}
private bool HasAvailableCapacity(ISequence[] gatingSequences, int requiredCapacity, long cursorValue)
{
var wrapPoint = (cursorValue + requiredCapacity) - _bufferSize;
var cachedGatingSequence = _gatingSequenceCache.Value;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > cursorValue)
{
long minSequence = Util.GetMinimumSequence(gatingSequences, cursorValue);
_gatingSequenceCache.SetValue(minSequence);
if (wrapPoint > minSequence)
{
return(false);
}
}
return(true);
}
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);
}
private bool HasAvailableCapacity(Sequence[] gatingSequences, int requiredCapacity, long cursorValue)
{
var wrapPoint = (cursorValue + requiredCapacity) - bufferSize;
var cachedGatingSequence = gatingSequenceCache.Value;
if (wrapPoint > cachedGatingSequence || cachedGatingSequence > cursorValue)
{
var minSequence = Util.GetMinimumSequence(sequencesRef.ReadFullFence(), cursorValue);
gatingSequenceCache.Value = minSequence;
if (wrapPoint > minSequence)
{
return(false);
}
}
return(true);
}
