//private long _lastEndOfFileOffset = -1;
public long Seek(long offset, SeekOrigin origin, bool leaveInUse = false)
{
//#if (_Linux)
// // linux doesn't expand the file if seek-ed beyond eof...
// if (RealStream.Length < offset)
// RealStream.SetLength(offset);
//#endif
InUse = true;
long l = RealStream.Seek(offset, origin);
//if (origin == SeekOrigin.End && offset >= 0)
//{
// if (l < _lastEndOfFileOffset + offset)
// {
// l = _lastEndOfFileOffset + offset;
// RealStream.Seek(l, SeekOrigin.Begin);
// }
// _lastEndOfFileOffset = l;
//}
if (!leaveInUse)
{
InUse = leaveInUse;
}
return(l);
}
public int EndRead(IAsyncResult asyncResult, bool leaveInUse = false)
{
int i = RealStream.EndRead(asyncResult);
InUse = leaveInUse;
return(i);
}
public long Seek(long offset, SeekOrigin origin)
{
long l = RealStream.Seek(offset, origin);
InUse = false;
return(l);
}
public int Read([In, Out] byte[] array, int offset, int count)
{
int i;
if (count <= (int)512) //DataBlockSize.Minimum)
{
i = RealStream.Read(array, offset, count);
}
else
{
IAsyncResult iar = RealStream.BeginRead(array, offset, count, null, null);
if (!iar.IsCompleted)
{
iar.AsyncWaitHandle.WaitOne();
}
i = RealStream.EndRead(iar);
}
InUse = false;
return(i);
}
public void EndWrite(IAsyncResult asyncResult, bool leaveInUse = false)
{
RealStream.EndWrite(asyncResult);
InUse = leaveInUse;
}
public IAsyncResult BeginWrite(byte[] array, int offset, int numBytes, AsyncCallback userCallback, object stateObject)
{
return(RealStream.BeginWrite(array, offset, numBytes, userCallback, stateObject));
}
public async Task <int> ReadAsync(byte[] array, int offset, int numBytes)
{
return(await RealStream.ReadAsync(array, offset, numBytes));
}
public void Write(byte[] array, int offset, int count)
{
RealStream.Write(array, offset, count);
InUse = false;
}
public void SetLength(long value, bool leaveInUse = false)
{
RealStream.SetLength(value);
InUse = leaveInUse;
}
public void EndWrite(IAsyncResult asyncResult)
{
RealStream.EndWrite(asyncResult);
InUse = false;
}
public void SetLength(long value)
{
RealStream.SetLength(value);
InUse = false;
}
