/// <summary>
/// Initializes a new instance of the <see cref="MemoryPoolAllocator"/> class.
/// </summary>
/// <param name="chunkCount">The number of chunks in the pool.</param>
/// <param name="bytesPerChunk">The bytes per chunk which also is the threshold for small allocations.</param>
/// <param name="allocator">The allocator.</param>
public MemoryPoolAllocator(int chunkCount, int bytesPerChunk, Allocator allocator) : base(true)
{
if (chunkCount <= 0)
{
throw new ArgumentException("chunkCount cannot be negative or 0", nameof(chunkCount));
}
if (bytesPerChunk <= 0)
{
throw new ArgumentException("bytesPerChunk cannot be negative or 0", nameof(bytesPerChunk));
}
int totalBytes = chunkCount * Math.Max(IntPtr.Size, bytesPerChunk);
_defaultAllocator = allocator;
_bufferStart = (byte *)Default.Allocate(totalBytes, initMemory: false);
_bufferEnd = _bufferStart + (totalBytes);
_chunkCount = chunkCount;
_chunkSize = bytesPerChunk;
for (int i = 0; i < chunkCount; ++i)
{
Chunk *cur = (Chunk *)(_bufferStart + (bytesPerChunk * i));
cur->next = _head;
_head = cur;
}
}
public StackAllocator(int totalBytes) : base(true)
{
if (totalBytes <= 0)
{
throw new ArgumentException(totalBytes.ToString(), nameof(totalBytes));
}
_buffer = (byte *)Default.Allocate(totalBytes);
_length = totalBytes;
_offset = _buffer;
}
