private Memory <T> GetMemory(int sizeHint)
{
ThrowIfDisposed();
if (sizeHint < 0)
{
throw new ArgumentOutOfRangeException(nameof(sizeHint));
}
if (sizeHint == 0)
{
return(GetMemory());
}
if (last is null)
{
first = last = new PooledMemoryChunk(allocator, sizeHint);
}
else if (last.FreeCapacity == 0)
{
last = new PooledMemoryChunk(allocator, sizeHint, last);
}
else if (last.FreeCapacity < sizeHint)
{
// there are two possible cases:
// the last chunk has occupied elements - attach a new chunk (causes a hole in the memory)
// the last chunk has no occupied elements - realloc the memory
if (last is PooledMemoryChunk pooledChunk && pooledChunk.IsUnused)
{
pooledChunk.Realloc(allocator, sizeHint);
}
else
{
last = new PooledMemoryChunk(allocator, sizeHint, last);
}
}
private unsafe Memory <T> GetMemory()
{
if (last is null)
{
first = last = new PooledMemoryChunk(allocator, chunkSize);
}
else if (last.FreeCapacity == 0)
{
last = new PooledMemoryChunk(allocator, growth(chunkSize, ref chunkIndex), last);
}
return(last.FreeMemory);
}
private Memory <T> GetMemory()
{
if (last is null)
{
first = last = new PooledMemoryChunk(allocator, chunkSize);
}
else if (last.FreeCapacity == 0)
{
last = new PooledMemoryChunk(allocator, chunkSize, last);
}
return(last.FreeMemory);
}
