public Span <byte> Rent(int numberOfElements, bool clearBuffer = false)
{
if (_disposed)
{
throw new ObjectDisposedException("NativeBufferPool");
}
Span <byte> buffer;
if (numberOfElements > _maxElements)
{
#if DEBUG
System.Diagnostics.Debugger.Break();
#endif
buffer = new Span <byte>(Marshal.AllocHGlobal(numberOfElements * Marshal.SizeOf(typeof(byte))).ToPointer(), numberOfElements);
}
else
{
int index = BufferUtilities.SelectBucketIndex(numberOfElements);
NativeBufferBucket bucket = Volatile.Read(ref _buckets[index]);
if (bucket == null)
{
NativeBufferBucket newBucket = new NativeBufferBucket(BufferUtilities.GetMaxSizeForBucket(index), NUMBER_OF_BUFFERS_IN_BUCKET);
if (Interlocked.CompareExchange(ref _buckets[index], newBucket, null) != null)
{
newBucket.Dispose();
}
bucket = _buckets[index];
}
var rented = bucket.Rent();
buffer = new Span <byte>(rented._memory, rented._length);
}
if (clearBuffer)
{
BufferUtilities.ClearSpan(buffer);
}
return(buffer);
}
public void Return(Span <byte> buffer, bool clearBuffer = false)
{
if (_disposed)
{
throw new ObjectDisposedException("NativeBufferPool");
}
if (clearBuffer)
{
BufferUtilities.ClearSpan(buffer);
}
if (buffer.Length > _maxElements)
{
Marshal.FreeHGlobal(new IntPtr(buffer.UnsafePointer));
}
else
{
_buckets[BufferUtilities.SelectBucketIndex(buffer.Length)].Return(new NativeBuffer(buffer.UnsafePointer, 0));
}
}