private void EnsureDisconnectEx(SafeCloseSocket socketHandle)
{
if (this.disconnectEx == null)
{
lock (this.lockObject)
{
if (this.disconnectEx == null)
{
Guid guid = new Guid("{0x7fda2e11,0x8630,0x436f,{0xa0, 0x31, 0xf5, 0x36, 0xa6, 0xee, 0xc1, 0x57}}");
IntPtr ptr = this.LoadDynamicFunctionPointer(socketHandle, ref guid);
this.disconnectEx = (DisconnectExDelegate)Marshal.GetDelegateForFunctionPointer(ptr, typeof(DisconnectExDelegate));
this.disconnectEx_Blocking = (DisconnectExDelegate_Blocking)Marshal.GetDelegateForFunctionPointer(ptr, typeof(DisconnectExDelegate_Blocking));
}
}
}
}
private void LoadDisconnectEx()
{
SocketError errorCode;
IntPtr ptrDisconnectEx = IntPtr.Zero;
unsafe
{
int length;
Guid guid = new Guid("{0x7fda2e11,0x8630,0x436f,{0xa0, 0x31, 0xf5, 0x36, 0xa6, 0xee, 0xc1, 0x57}}");
// This can throw ObjectDisposedException.
errorCode = UnsafeNclNativeMethods.OSSOCK.WSAIoctl(
m_Handle,
IoctlSocketConstants.SIOGETEXTENSIONFUNCTIONPOINTER,
ref guid,
sizeof(Guid),
out ptrDisconnectEx,
sizeof(IntPtr),
out length,
IntPtr.Zero,
IntPtr.Zero);
}
if (errorCode != SocketError.Success)
{
throw new SocketException();
}
s_DisconnectEx = (DisconnectExDelegate) Marshal.GetDelegateForFunctionPointer(ptrDisconnectEx, typeof(DisconnectExDelegate));
s_DisconnectEx_Blocking = (DisconnectExDelegate_Blocking)Marshal.GetDelegateForFunctionPointer(ptrDisconnectEx, typeof(DisconnectExDelegate_Blocking));
}
