/// <exception cref="IOException">Error reading from the stream.</exception>
internal static unsafe NativeHeapMemoryBlock ReadMemoryBlockNoLock(Stream stream, long start, int size)
{
var block = new NativeHeapMemoryBlock(size);
bool fault = true;
try
{
stream.Seek(start, SeekOrigin.Begin);
int bytesRead = 0;
if ((bytesRead = stream.Read(block.Pointer, size)) != size)
{
stream.CopyTo(block.Pointer + bytesRead, size - bytesRead);
}
fault = false;
}
finally
{
if (fault)
{
block.Dispose();
}
}
return(block);
}
internal static unsafe NativeHeapMemoryBlock ReadMemoryBlockNoLock(Stream stream, bool isFileStream, long start, int size)
{
var block = new NativeHeapMemoryBlock(size);
bool fault = true;
try
{
stream.Seek(start, SeekOrigin.Begin);
if (!isFileStream || !FileStreamReadLightUp.TryReadFile(stream, block.Pointer, start, size))
{
stream.CopyTo(block.Pointer, size);
}
fault = false;
}
finally
{
if (fault)
{
block.Dispose();
}
}
return(block);
}
internal static unsafe NativeHeapMemoryBlock ReadMemoryBlockNoLock(Stream stream, bool isFileStream, long start, int size)
{
var block = new NativeHeapMemoryBlock(size);
bool fault = true;
try
{
stream.Seek(start, SeekOrigin.Begin);
if (!isFileStream || !FileStreamReadLightUp.TryReadFile(stream, block.Pointer, start, size))
{
stream.CopyTo(block.Pointer, size);
}
fault = false;
}
finally
{
if (fault)
{
block.Dispose();
}
}
return block;
}