/// <summary>
/// Creates a buffer of the specified fixed capacity. Depending on the required capacity, either a SingleChunkBuffer or a MultiChunkBuffer will be created.
/// </summary>
/// <param name="chunkPool">The chunk pool.</param>
/// <param name="fixedCapacity">The required capacity.</param>
/// <returns>A buffer.</returns>
public static IByteBuffer Create(BsonChunkPool chunkPool, int fixedCapacity)
{
if (chunkPool == null)
{
throw new ArgumentNullException("pool");
}
if (fixedCapacity <= 0)
{
throw new ArgumentOutOfRangeException("capacity");
}
if (fixedCapacity < chunkPool.ChunkSize)
{
var chunk = chunkPool.AcquireChunk();
return new SingleChunkBuffer(chunk, 0, 0, false);
}
else
{
var chunksNeeded = ((fixedCapacity - 1) / chunkPool.ChunkSize) + 1;
var chunks = new List<BsonChunk>(chunksNeeded);
for (int i = 0; i < chunksNeeded; i++)
{
chunks.Add(chunkPool.AcquireChunk());
}
return new MultiChunkBuffer(chunks, 0, 0, false);
}
}
/// <summary>
/// Creates a buffer of the specified fixed capacity. Depending on the required capacity, either a SingleChunkBuffer or a MultiChunkBuffer will be created.
/// </summary>
/// <param name="chunkPool">The chunk pool.</param>
/// <param name="fixedCapacity">The required capacity.</param>
/// <returns>A buffer.</returns>
public static IByteBuffer Create(BsonChunkPool chunkPool, int fixedCapacity)
{
if (chunkPool == null)
{
throw new ArgumentNullException("pool");
}
if (fixedCapacity <= 0)
{
throw new ArgumentOutOfRangeException("capacity");
}
if (fixedCapacity < chunkPool.ChunkSize)
{
var chunk = chunkPool.AcquireChunk();
return(new SingleChunkBuffer(chunk, 0, 0, false));
}
else
{
var chunksNeeded = ((fixedCapacity - 1) / chunkPool.ChunkSize) + 1;
var chunks = new List <BsonChunk>(chunksNeeded);
for (int i = 0; i < chunksNeeded; i++)
{
chunks.Add(chunkPool.AcquireChunk());
}
return(new MultiChunkBuffer(chunks, 0, 0, false));
}
}
private void ExpandCapacity(int targetCapacity)
{
if (_chunkPool == null)
{
throw new InvalidOperationException("Capacity cannot be expanded because this buffer was created without specifying a chunk pool.");
}
while (_capacity < targetCapacity)
{
var chunk = _chunkPool.AcquireChunk();
chunk.IncrementReferenceCount();
_chunks.Add(chunk);
_capacity += _chunkSize;
}
}
