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); }
public static void Initialize(int maxMemoryUsageMb) { BufferManager.pool = new SmartBufferPool(maxMemoryUsageMb, maxMemoryUsageMb / 8, maxMemoryUsageMb / 16); }
public static void Initialize(int maxMemoryUsageMb, int initialSizeMb, int extraBufferSizeMb) { BufferManager.pool = new SmartBufferPool(maxMemoryUsageMb, initialSizeMb, extraBufferSizeMb); }