AllocateBuffer() static private method

static private AllocateBuffer ( int size, InternalBufferManager bufferManager ) : ManagedBuffer
size int
bufferManager InternalBufferManager
return ManagedBuffer
ByteBuffer Class Documentation
Example #1
0
        public void Validate(bool write, int dataSize)
        {
            bool valid = false;

            if (write)
            {
                if (this.Size < dataSize && this.autoGrow)
                {
                    if (this.references != 1)
                    {
                        throw new InvalidOperationException("Cannot grow the current buffer because it has more than one references");
                    }

                    int           newSize = Math.Max(this.Capacity * 2, this.Capacity + dataSize);
                    ManagedBuffer newBuffer;
                    if (this.bufferManager != null)
                    {
                        newBuffer = ByteBuffer.AllocateBuffer(newSize, this.bufferManager);
                    }
                    else
                    {
                        newBuffer = new ManagedBuffer(new byte[newSize], null);
                    }

                    System.Buffer.BlockCopy(this.buffer, this.start, newBuffer.Buffer, 0, this.Capacity);

                    int consumed = this.read - this.start;
                    int written  = this.write - this.start;

                    this.start = 0;
                    this.read  = consumed;
                    this.write = written;
                    this.end   = newSize;

                    if (this.bufferManager != null)
                    {
                        this.bufferManager.ReturnBuffer(this.buffer);
                    }
                    this.buffer        = newBuffer.Buffer;
                    this.bufferManager = newBuffer.BufferManager;
                }

                valid = this.Size >= dataSize;
            }
            else
            {
                valid = this.Length >= dataSize;
            }

            if (!valid)
            {
                throw new AmqpException(AmqpErrorCode.DecodeError, AmqpResources.GetString(AmqpResources.AmqpInsufficientBufferSize, dataSize, write ? this.Size : this.Length));
            }
        }