public override byte[] TakeBuffer(int bufferSize)
{
InternalBufferManager.PooledBufferManager.BufferPool bufferPool = this.FindPool(bufferSize);
if (bufferPool == null)
{
return(InternalBufferManager.AllocateByteArray(bufferSize));
}
byte[] numArray = bufferPool.Take();
if (numArray != null)
{
bufferPool.DecrementCount();
return(numArray);
}
if (bufferPool.Peak == bufferPool.Limit)
{
InternalBufferManager.PooledBufferManager.BufferPool misses = bufferPool;
misses.Misses = misses.Misses + 1;
InternalBufferManager.PooledBufferManager pooledBufferManager = this;
int num = pooledBufferManager.totalMisses + 1;
int num1 = num;
pooledBufferManager.totalMisses = num;
if (num1 >= 8)
{
this.TuneQuotas();
}
}
return(InternalBufferManager.AllocateByteArray(bufferPool.BufferSize));
}
private void TuneQuotas()
{
if (this.areQuotasBeingTuned)
{
return;
}
bool flag = false;
try
{
Monitor.TryEnter(this.tuningLock, ref flag);
if (!flag || this.areQuotasBeingTuned)
{
return;
}
else
{
this.areQuotasBeingTuned = true;
}
}
finally
{
if (flag)
{
Monitor.Exit(this.tuningLock);
}
}
int num = this.FindMostStarvedPool();
if (num >= 0)
{
InternalBufferManager.PooledBufferManager.BufferPool bufferPool = this.bufferPools[num];
if (this.remainingMemory < (long)bufferPool.BufferSize)
{
int num1 = this.FindMostExcessivePool();
if (num1 >= 0)
{
this.DecreaseQuota(ref this.bufferPools[num1]);
}
}
if (this.remainingMemory >= (long)bufferPool.BufferSize)
{
this.IncreaseQuota(ref this.bufferPools[num]);
}
}
for (int i = 0; i < (int)this.bufferPools.Length; i++)
{
this.bufferPools[i].Misses = 0;
}
this.totalMisses = 0;
this.areQuotasBeingTuned = false;
}
public override void ReturnBuffer(byte[] buffer)
{
InternalBufferManager.PooledBufferManager.BufferPool bufferPool = this.FindPool((int)buffer.Length);
if (bufferPool != null)
{
if ((int)buffer.Length != bufferPool.BufferSize)
{
throw Fx.Exception.Argument("buffer", SRCore.BufferIsNotRightSizeForBufferManager);
}
if (bufferPool.Return(buffer))
{
bufferPool.IncrementCount();
}
}
}
private int FindMostStarvedPool()
{
long num = (long)0;
int num1 = -1;
for (int i = 0; i < (int)this.bufferPools.Length; i++)
{
InternalBufferManager.PooledBufferManager.BufferPool bufferPool = this.bufferPools[i];
if (bufferPool.Peak == bufferPool.Limit)
{
long misses = (long)bufferPool.Misses * (long)bufferPool.BufferSize;
if (misses > num)
{
num1 = i;
num = misses;
}
}
}
return(num1);
}
private int FindMostExcessivePool()
{
long num = (long)0;
int num1 = -1;
for (int i = 0; i < (int)this.bufferPools.Length; i++)
{
InternalBufferManager.PooledBufferManager.BufferPool bufferPool = this.bufferPools[i];
if (bufferPool.Peak < bufferPool.Limit)
{
long limit = (long)(bufferPool.Limit - bufferPool.Peak) * (long)bufferPool.BufferSize;
if (limit > num)
{
num1 = i;
num = limit;
}
}
}
return(num1);
}
private void ChangeQuota(ref InternalBufferManager.PooledBufferManager.BufferPool bufferPool, int delta)
{
InternalBufferManager.PooledBufferManager.BufferPool bufferPool1 = bufferPool;
int limit = bufferPool1.Limit + delta;
InternalBufferManager.PooledBufferManager.BufferPool bufferPool2 = InternalBufferManager.PooledBufferManager.BufferPool.CreatePool(bufferPool1.BufferSize, limit);
for (int i = 0; i < limit; i++)
{
byte[] numArray = bufferPool1.Take();
if (numArray == null)
{
break;
}
bufferPool2.Return(numArray);
bufferPool2.IncrementCount();
}
InternalBufferManager.PooledBufferManager bufferSize = this;
bufferSize.remainingMemory = bufferSize.remainingMemory - (long)(bufferPool1.BufferSize * delta);
bufferPool = bufferPool2;
}
private void IncreaseQuota(ref InternalBufferManager.PooledBufferManager.BufferPool bufferPool)
{
this.ChangeQuota(ref bufferPool, 1);
}