/// <summary>
/// Internal method called when a block is requested and the pool is empty. It allocates one additional slab, creates all of the
/// block tracking objects, and adds them all to the pool.
/// </summary>
private MemoryPoolBlock2 AllocateSlab()
{
var slab = MemoryPoolSlab2.Create(_slabLength);
_slabs.Push(slab);
var basePtr = slab.ArrayPtr;
var firstOffset = (int)((_blockStride - 1) - ((ulong)(basePtr + _blockStride - 1) % _blockStride));
var poolAllocationLength = _slabLength - _blockStride;
var offset = firstOffset;
for (;
offset + _blockLength < poolAllocationLength;
offset += _blockStride)
{
var block = MemoryPoolBlock2.Create(
new ArraySegment <byte>(slab.Array, offset, _blockLength),
basePtr,
this,
slab);
Return(block);
}
// return last block rather than adding to pool
var newBlock = MemoryPoolBlock2.Create(
new ArraySegment <byte>(slab.Array, offset, _blockLength),
basePtr,
this,
slab);
return(newBlock);
}
/// <summary>
/// Internal method called when a block is requested and the pool is empty. It allocates one additional slab, creates all of the
/// block tracking objects, and adds them all to the pool.
/// </summary>
private void AllocateSlab()
{
var slab = MemoryPoolSlab2.Create(_slabLength);
_slabs.Push(slab);
var basePtr = slab.ArrayPtr;
var firstOffset = (int)((_blockStride - 1) - ((ulong)(basePtr + _blockStride - 1) % _blockStride));
for (var offset = firstOffset;
offset + _blockLength <= _slabLength;
offset += _blockStride)
{
var block = MemoryPoolBlock2.Create(
new ArraySegment <byte>(slab.Array, offset, _blockLength),
basePtr,
this,
slab);
Return(block);
}
}
