public Streaming.IMMappedChunkData MMapChunkData(Streaming.IChunk chunk)
{
ChunkFile_t chunkFile;
if (_chunkFiles.TryGetValue(chunk.chunkPos, out chunkFile))
{
if ((_chunkRead != null) && (_chunkRead.modifyCount < _modifyCount))
{
ReleaseMMChunkFile(_chunkRead);
_chunkRead = null;
}
if (_chunkRead == null)
{
_chunkRead = _mmChunkFiles.GetObject();
try {
_chunkRead.Open(_chunkFilePath);
_chunkRead.modifyCount = _modifyCount;
} catch (Exception e) {
_chunkRead.Release();
_chunkRead.Dispose();
_mmChunkFiles.ReturnObject(_chunkRead);
_chunkRead = null;
throw e;
}
}
if ((chunkFile.ofs + chunkFile.size) > _chunkRead.fileSize)
{
_chunkFiles.Remove(chunk.chunkPos);
return(null);
}
var io = _mmChunkIO.GetObject();
io.worldFile = this;
io.chunkFile = _chunkRead;
io.flags = (EChunkFlags)chunkFile.flags;
io.len = (int)chunkFile.size;
unsafe {
io.ptr = _chunkRead.ptr + chunkFile.ofs;
}
_chunkRead.AddRef();
return(io);
}
return(null);
}
void OpenChunkFile(string path)
{
_chunkFilePath = path + ".cdf";
_chunkRead = _mmChunkFiles.GetObject();
_chunkRead.Open(_chunkFilePath);
try {
var writeFile = File.Open(_chunkFilePath, FileMode.Open, FileAccess.Write, FileShare.ReadWrite);
_chunkWrite = new BinaryWriter(writeFile);
_chunkWrite.BaseStream.Position = _chunkWrite.BaseStream.Length;
} catch (Exception e) {
_chunkRead.Release();
_chunkRead.Dispose();
_mmChunkFiles.ReturnObject(_chunkRead);
_chunkRead = null;
throw e;
}
}