internal void ReturnLargeBuffer()

in src/RecyclableMemoryStreamManager.cs [520:561]
34 lines of code
6 McCabe index (conditional complexity)

        internal void ReturnLargeBuffer(byte[] buffer, Guid id, string tag)
        {
            if (buffer == null)
            {
                throw new ArgumentNullException(nameof(buffer));
            }

            if (!this.IsLargeBufferSize(buffer.Length))
            {
                throw new ArgumentException($"{nameof(buffer)} did not originate from this memory manager. The size is not " +
                                            $"{(this.UseExponentialLargeBuffer ? "an exponential" : "a multiple")} of {this.LargeBufferMultiple}.");
            }

            var poolIndex = this.GetPoolIndex(buffer.Length);

            if (poolIndex < this.largePools.Length)
            {
                if ((this.largePools[poolIndex].Count + 1) * buffer.Length <= this.MaximumFreeLargePoolBytes ||
                    this.MaximumFreeLargePoolBytes == 0)
                {
                    this.largePools[poolIndex].Push(buffer);
                    Interlocked.Add(ref this.largeBufferFreeSize[poolIndex], buffer.Length);
                }
                else
                {
                    ReportBufferDiscarded(id, tag, Events.MemoryStreamBufferType.Large, Events.MemoryStreamDiscardReason.EnoughFree);
                }
            }
            else
            {
                // This is a non-poolable buffer, but we still want to track its size for inuse
                // analysis. We have space in the inuse array for this.
                poolIndex = this.largeBufferInUseSize.Length - 1;

                ReportBufferDiscarded(id, tag, Events.MemoryStreamBufferType.Large, Events.MemoryStreamDiscardReason.TooLarge);
            }

            Interlocked.Add(ref this.largeBufferInUseSize[poolIndex], -buffer.Length);

            ReportUsageReport(this.smallPoolInUseSize, this.smallPoolFreeSize, this.LargePoolInUseSize,
                              this.LargePoolFreeSize);
        }