//Dynamic size entries are split into chunks that are spread around the file. We need to read per chunk
unsafe ReadHandle ScheduleDynamicSizeElementArrayReads(Entry entry, uint elementOffset, uint elementCount, long readSize, void *buffer)
{
var block = m_Blocks[(int)entry.Header.BlockIndex];
byte *dst = (byte *)buffer;
var chunkReads = new NativeBlockList <ReadCommand>(64, 64);
for (int i = 0; i < elementCount; ++i)
{
var e = new ElementRead();
e.start = entry.GetAdditionalStoragePtr()[i + elementOffset];
e.end = i + elementOffset + 1 == entry.Count ? (long)entry.Header.HeaderMeta : entry.GetAdditionalStoragePtr()[i + elementOffset + 1];
e.readDst = dst;
var readOffset = ProcessDynamicSizeElement(ref chunkReads, ref block, e);
dst += readOffset;
readSize -= readOffset;
}
Checks.CheckEquals(0, readSize);
//TODO: find a way to use the block array chunks directly for scheduling, probably add readcommandbuffer
using (NativeArray <ReadCommand> readCommands = new NativeArray <ReadCommand>((int)chunkReads.Count, Allocator.Temp))
{
var cmdsPtr = (ReadCommand *)readCommands.GetUnsafePtr();
for (int i = 0; i < readCommands.Length; ++i)
{
*(cmdsPtr + i) = chunkReads[i];
}
chunkReads.Dispose();
return(m_FileReader.Read(cmdsPtr, (uint)readCommands.Length, ReadMode.Async));
}
}
public NativeBlockList(int blockSize, int initialCapacity)
{
Checks.CheckEquals(true, UnsafeUtility.IsBlittable <T>());
m_BlockSize = blockSize;
uint preAllocatedBlockCount = ComputeBlockCount((uint)initialCapacity, m_BlockSize);
m_Capacity = preAllocatedBlockCount * (uint)m_BlockSize;
Count = 0;
m_BlockSlots = preAllocatedBlockCount;
m_UnusedBlockSlots = 0;
m_BlockList = (MemBlock *)UnsafeUtility.Malloc(UnsafeUtility.SizeOf <MemBlock>() * preAllocatedBlockCount, UnsafeUtility.AlignOf <MemBlock>(), Allocator.Persistent);
while (preAllocatedBlockCount > 0)
{
--preAllocatedBlockCount;
var block = new MemBlock();
block.mem = UnsafeUtility.Malloc(UnsafeUtility.SizeOf <T>() * m_BlockSize, UnsafeUtility.AlignOf <T>(), Allocator.Persistent);
*(m_BlockList + preAllocatedBlockCount) = block;
}
}
