private int write(ByteBuffer buf)
{
Debug.Assert(_fd != null);
#if COMPACT || SILVERLIGHT
//
// Silverlight and the Compact .NET Frameworks don't
// support the use of synchronous socket operations on a
// non-blocking socket. Returning 0 here forces the caller
// to schedule an asynchronous operation.
//
return 0;
#else
int packetSize = buf.remaining();
if(AssemblyUtil.platform_ == AssemblyUtil.Platform.Windows)
{
//
// On Windows, limiting the buffer size is important to prevent
// poor throughput performances when transfering large amount of
// data. See Microsoft KB article KB823764.
//
if(_maxSendPacketSize > 0 && packetSize > _maxSendPacketSize / 2)
{
packetSize = _maxSendPacketSize / 2;
}
}
int sent = 0;
while(buf.hasRemaining())
{
try
{
int ret = _fd.Send(buf.rawBytes(), buf.position(), packetSize, SocketFlags.None);
Debug.Assert(ret > 0);
sent += ret;
buf.position(buf.position() + ret);
if(packetSize > buf.remaining())
{
packetSize = buf.remaining();
}
}
catch(SocketException ex)
{
if(Network.wouldBlock(ex))
{
return sent;
}
else if(Network.connectionLost(ex))
{
throw new Ice.ConnectionLostException(ex);
}
throw new Ice.SocketException(ex);
}
}
return sent;
#endif
}
private int read(ByteBuffer buf)
{
Debug.Assert(_fd != null);
#if COMPACT || SILVERLIGHT
//
// Silverlight and the Compact .NET Framework don't
// support the use of synchronous socket operations on a
// non-blocking socket. Returning 0 here forces the caller
// to schedule an asynchronous operation.
//
return 0;
#else
int read = 0;
while(buf.hasRemaining())
{
try
{
int ret = _fd.Receive(buf.rawBytes(), buf.position(), buf.remaining(), SocketFlags.None);
if(ret == 0)
{
throw new Ice.ConnectionLostException();
}
read += ret;
buf.position(buf.position() + ret);
}
catch(SocketException ex)
{
if(Network.wouldBlock(ex))
{
return read;
}
else if(Network.interrupted(ex))
{
continue;
}
else if(Network.connectionLost(ex))
{
throw new Ice.ConnectionLostException(ex);
}
throw new Ice.SocketException(ex);
}
}
return read;
#endif
}
private int read(ByteBuffer buf)
{
Debug.Assert(_fd != null);
int read = 0;
while(buf.hasRemaining())
{
try
{
int ret = _fd.Receive(buf.rawBytes(), buf.position(), buf.remaining(), SocketFlags.None);
if(ret == 0)
{
throw new Ice.ConnectionLostException();
}
read += ret;
buf.position(buf.position() + ret);
}
catch(SocketException ex)
{
if(Network.wouldBlock(ex))
{
return read;
}
else if(Network.interrupted(ex))
{
continue;
}
else if(Network.connectionLost(ex))
{
throw new Ice.ConnectionLostException(ex);
}
throw new Ice.SocketException(ex);
}
}
return read;
}
private int write(ByteBuffer buf)
{
Debug.Assert(_fd != null);
int packetSize = buf.remaining();
if(AssemblyUtil.platform_ == AssemblyUtil.Platform.Windows)
{
//
// On Windows, limiting the buffer size is important to prevent
// poor throughput performances when transfering large amount of
// data. See Microsoft KB article KB823764.
//
if(_maxSendPacketSize > 0 && packetSize > _maxSendPacketSize / 2)
{
packetSize = _maxSendPacketSize / 2;
}
}
int sent = 0;
while(buf.hasRemaining())
{
try
{
int ret = _fd.Send(buf.rawBytes(), buf.position(), packetSize, SocketFlags.None);
Debug.Assert(ret > 0);
sent += ret;
buf.position(buf.position() + ret);
if(packetSize > buf.remaining())
{
packetSize = buf.remaining();
}
}
catch(SocketException ex)
{
if(Network.wouldBlock(ex))
{
return sent;
}
else if(Network.connectionLost(ex))
{
throw new Ice.ConnectionLostException(ex);
}
throw new Ice.SocketException(ex);
}
}
return sent;
}
private void reserve(int n)
{
Debug.Assert(_capacity == b.capacity());
if(n > _capacity)
{
_capacity = System.Math.Max(n, 2 * _capacity);
_capacity = System.Math.Max(240, _capacity);
}
else if(n < _capacity)
{
_capacity = n;
}
else
{
return;
}
try
{
ByteBuffer buf = ByteBuffer.allocate(_capacity);
if(b == _emptyBuffer)
{
b = buf;
}
else
{
int pos = b.position();
b.position(0);
b.limit(System.Math.Min(_capacity, b.capacity()));
buf.put(b);
b = buf;
b.limit(b.capacity());
b.position(pos);
}
b.order(_order);
}
catch(System.OutOfMemoryException)
{
_capacity = b.capacity(); // Restore the previous capacity
throw;
}
catch(System.Exception ex)
{
_capacity = b.capacity(); // Restore the previous capacity.
Ice.MarshalException e = new Ice.MarshalException(ex);
e.reason = "unexpected exception while trying to allocate a ByteBuffer:\n" + ex;
throw e;
}
finally
{
Debug.Assert(_capacity == b.capacity());
}
}
