public ArraySegment <byte> Allocate(int size)
{
if (size > 262144)
{
throw new ArgumentOutOfRangeException("Too large size");
}
size = 1024 << this.GetBitOffset(size);
int num;
int num2;
if (!this.GetAllocated(size, out num, out num2))
{
while (true)
{
long num3 = Interlocked.Read(ref this.indexOffset);
num2 = (int)num3;
num = (int)(num3 >> 32);
while (this.buffers[num] == null)
{
Thread.Sleep(0);
}
if (this.buffers[num].Length - num2 < size)
{
if (num + 1 >= this.buffers.Length)
{
break;
}
if (Interlocked.CompareExchange(ref this.indexOffset, (long)(num + 1) << 32, num3) == num3)
{
this.buffers[num + 1] = SmartBufferPool.NewBuffer(this.ExtraMemoryUsage);
}
}
if (Interlocked.CompareExchange(ref this.indexOffset, num3 + (long)size, num3) == num3)
{
goto IL_C4;
}
}
throw new OutOfMemoryException("Source: BufferManager");
}
IL_C4:
return(new ArraySegment <byte>(this.buffers[num], num2, size));
}
public SmartBufferPool(int maxMemoryUsageMb, int initialSizeMb, int extraBufferSizeMb)
{
this.InitialMemoryUsage = (long)initialSizeMb * 1048576L;
this.ExtraMemoryUsage = (long)extraBufferSizeMb * 1048576L;
this.MaxBuffersCount = ((long)maxMemoryUsageMb * 1048576L - this.InitialMemoryUsage) / this.ExtraMemoryUsage;
this.MaxMemoryUsage = this.InitialMemoryUsage + this.ExtraMemoryUsage * this.MaxBuffersCount;
this.array = new LockFreeItem <long> [this.MaxMemoryUsage / 1024L];
this.empty = new LockFreeStack <long>(this.array, 0, this.array.Length);
int num = 0;
while (262144 >> num >= 1024)
{
num++;
}
this.ready = new LockFreeStack <long> [num];
for (int i = 0; i < this.ready.Length; i++)
{
this.ready[i] = new LockFreeStack <long>(this.array, -1, -1);
}
this.buffers = new byte[this.MaxBuffersCount][];
this.buffers[0] = SmartBufferPool.NewBuffer(this.InitialMemoryUsage);
}
