ACE: ACE_SPIPE_Connector class Reference

Actively connect and produce a if things go well. The is the address that we are trying to connect with. The is the amount of time to wait to connect. If it's 0 then we block indefinitely. If *timeout == {0, 0} then the connection is done using non-blocking mode. In this case, if the connection can't be made immediately the value of -1 is returned with <errno == EWOULDBLOCK>. If *timeout > {0, 0} then this is the maximum amount of time to wait before timing out. If the time expires before the connection is made <errno == ETIME>. The is the value of local address to bind to. If it's the default value of <ACE_Addr::sap_any> then the user is letting the OS do the binding. If == 1 then the is reused, even if it hasn't been cleanedup yet. The and arguments are passed down to the method. The argument is only used in NT and is used to establish the NT pipe mode.

00062 {
00063   ACE_TRACE ("ACE_SPIPE_Connector::connect");
00064   // Make darn sure that the O_CREAT flag is not set!
00065   ACE_CLR_BITS (flags, O_CREAT);
00066 
00067   ACE_HANDLE handle;
00068 
00069   ACE_UNUSED_ARG (pipe_mode);
00070 #if defined (ACE_WIN32) && \
00071    !defined (ACE_HAS_PHARLAP) && !defined (ACE_HAS_WINCE)
00072   // We need to allow for more than one attempt to connect,
00073   // calculate the absolute time at which we give up.
00074   ACE_Time_Value absolute_time;
00075   if (timeout != 0)
00076     absolute_time = ACE_OS::gettimeofday () + *timeout;
00077 
00078   // Loop until success or failure.
00079   for (;;)
00080     {
00081       handle = ACE_OS::open (remote_sap.get_path_name(), flags, perms, sa);
00082       if (handle != ACE_INVALID_HANDLE)
00083         // Success!
00084         break;
00085 
00086       // Check if we have a busy pipe condition.
00087       if (::GetLastError() != ERROR_PIPE_BUSY)
00088         // Nope, this is a failure condition.
00089         break;
00090 
00091       // This will hold the time out value used in the ::WaitNamedPipe
00092       // call.
00093       DWORD time_out_value;
00094 
00095       // Check if we are to block until we connect.
00096       if (timeout == 0)
00097         // Wait for as long as it takes.
00098         time_out_value = NMPWAIT_WAIT_FOREVER;
00099       else
00100         {
00101           // Calculate the amount of time left to wait.
00102           ACE_Time_Value relative_time (absolute_time - ACE_OS::gettimeofday ());
00103           // Check if we have run out of time.
00104           if (relative_time <= ACE_Time_Value::zero)
00105             {
00106               // Mimick the errno value returned by
00107               // ACE::handle_timed_open.
00108               if (*timeout == ACE_Time_Value::zero)
00109                 errno = EWOULDBLOCK;
00110               else
00111                 errno = ETIMEDOUT;
00112               // Exit the connect loop with the failure.
00113               break;
00114             }
00115           // Get the amount of time remaining for ::WaitNamedPipe.
00116           time_out_value = relative_time.msec ();
00117 
00118         }
00119 
00120       // Wait for the named pipe to become available.
00121       ACE_TEXT_WaitNamedPipe (remote_sap.get_path_name (),
00122                               time_out_value);
00123 
00124       // Regardless of the return value, we'll do one more attempt to
00125       // connect to see if it is now available and to return
00126       // consistent error values.
00127     }
00128 
00129   // Set named pipe mode if we have a valid handle.
00130   if (handle != ACE_INVALID_HANDLE)
00131     {
00132       // Check if we are changing the pipe mode from the default.
00133       if (pipe_mode != (PIPE_READMODE_BYTE | PIPE_WAIT))
00134         {
00135           DWORD dword_pipe_mode = pipe_mode;
00136           if (!::SetNamedPipeHandleState (handle,
00137                                           &dword_pipe_mode,
00138                                           0,
00139                                           0))
00140             {
00141               // We were not able to put the pipe into the requested
00142               // mode.
00143               ACE_OS::close (handle);
00144               handle = ACE_INVALID_HANDLE;
00145             }
00146         }
00147     }
00148 #else /* ACE_WIN32 && !ACE_HAS_PHARLAP */
00149   handle = ACE::handle_timed_open (timeout,
00150                                               remote_sap.get_path_name (),
00151                                               flags, perms, sa);
00152 #endif /* !ACE_WIN32 || ACE_HAS_PHARLAP || ACE_HAS_WINCE */
00153 
00154   new_io.set_handle (handle);
00155   new_io.remote_addr_ = remote_sap; // class copy.
00156 
00157   return handle == ACE_INVALID_HANDLE ? -1 : 0;
00158 }


Public Types
typedef ACE_SPIPE_Addr	PEER_ADDR
typedef ACE_SPIPE_Stream	PEER_STREAM
Public Member Functions
	ACE_SPIPE_Connector (void)
	Default constructor.
	ACE_SPIPE_Connector (ACE_SPIPE_Stream &new_io, const ACE_SPIPE_Addr &remote_sap, ACE_Time_Value *timeout=0, const ACE_Addr &local_sap=ACE_Addr::sap_any, int reuse_addr=0, int flags=O_RDWR, int perms=0, LPSECURITY_ATTRIBUTES sa=0, int pipe_mode=PIPE_READMODE_MESSAGE\|PIPE_WAIT)
int	connect (ACE_SPIPE_Stream &new_io, const ACE_SPIPE_Addr &remote_sap, ACE_Time_Value *timeout=0, const ACE_Addr &local_sap=ACE_Addr::sap_any, int reuse_addr=0, int flags=O_RDWR, int perms=0, LPSECURITY_ATTRIBUTES sa=0, int pipe_mode=PIPE_READMODE_MESSAGE\|PIPE_WAIT)
int	reset_new_handle (ACE_HANDLE handle)
	Resets any event associations on this handle.
void	dump (void) const
	Dump the state of an object.
Public Attributes
	ACE_ALLOC_HOOK_DECLARE
	Declare the dynamic allocation hooks.

ACE_SPIPE_Connector Class Reference

Public Types

Public Member Functions

Public Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation