/* $Xorg: shutdown.c,v 1.4 2001/02/09 02:03:26 xorgcvs Exp $ */ /****************************************************************************** Copyright 1993, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. Author: Ralph Mor, X Consortium ******************************************************************************/ #include #include "ICElibint.h" Status IceProtocolShutdown (iceConn, majorOpcode) IceConn iceConn; int majorOpcode; { if (iceConn->proto_ref_count == 0 || iceConn->process_msg_info == NULL || majorOpcode < 1 || majorOpcode > _IceLastMajorOpcode) { return (0); } else { /* * Make sure this majorOpcode is really being used. */ int i; for (i = iceConn->his_min_opcode; i <= iceConn->his_max_opcode; i++) { if (iceConn->process_msg_info[ i - iceConn->his_min_opcode].in_use && iceConn->process_msg_info[ i - iceConn->his_min_opcode].my_opcode == majorOpcode) break; } if (i > iceConn->his_max_opcode) { return (0); } else { /* * OK, we can shut down the protocol. */ iceConn->process_msg_info[ i - iceConn->his_min_opcode].in_use = False; iceConn->proto_ref_count--; return (1); } } } void IceSetShutdownNegotiation (iceConn, negotiate) IceConn iceConn; Bool negotiate; { iceConn->skip_want_to_close = negotiate ? False : True; } Bool IceCheckShutdownNegotiation (iceConn) IceConn iceConn; { return (iceConn->skip_want_to_close ? False : True); } IceCloseStatus IceCloseConnection (iceConn) IceConn iceConn; { int refCountReachedZero; IceCloseStatus status; /* * If this connection object was never valid, we can close * it right now. This happens if IceAcceptConnection was * called, but after calling IceProcessMessages several times * the connection was rejected (because of authentication or * some other reason). */ if (iceConn->listen_obj && iceConn->connection_status != IceConnectAccepted) { _IceConnectionClosed (iceConn); /* invoke watch procs */ _IceFreeConnection (iceConn); return (IceClosedNow); } /*--------------------------------------------------------------- ACTIONS: A = Invoke Watch Procedures B = Set free-asap bit C = Free connection D = Initialize shutdown negotiation N = do nothing ACTION TABLE: IO free- dispatch protocol shutdown error asap bit level refcount negotiation ACTION occured set reached 0 reached 0 0 0 0 0 0 N 0 0 0 0 1 N 0 0 0 1 0 AB 0 0 0 1 1 N 0 0 1 0 0 N 0 0 1 0 1 N 0 0 1 1 0 AC 0 0 1 1 1 D 0 1 0 0 0 N 0 1 0 0 1 N 0 1 0 1 0 N 0 1 0 1 1 N 0 1 1 0 0 C 0 1 1 0 1 D 0 1 1 1 0 C 0 1 1 1 1 D 1 0 0 0 0 AB 1 0 0 0 1 AB 1 0 0 1 0 AB 1 0 0 1 1 AB 1 0 1 0 0 AC 1 0 1 0 1 AC 1 0 1 1 0 AC 1 0 1 1 1 AC 1 1 0 0 0 N 1 1 0 0 1 N 1 1 0 1 0 N 1 1 0 1 1 N 1 1 1 0 0 C 1 1 1 0 1 C 1 1 1 1 0 C 1 1 1 1 1 C ---------------------------------------------------------------*/ if (iceConn->open_ref_count > 0) iceConn->open_ref_count--; refCountReachedZero = iceConn->open_ref_count == 0 && iceConn->proto_ref_count == 0; status = IceConnectionInUse; if (!iceConn->free_asap && (!iceConn->io_ok || (iceConn->io_ok && refCountReachedZero && iceConn->skip_want_to_close))) { /* * Invoke the watch procedures now. */ _IceConnectionClosed (iceConn); status = IceClosedNow; /* may be overwritten by IceClosedASAP */ } if (!iceConn->free_asap && iceConn->dispatch_level != 0 && (!iceConn->io_ok || (iceConn->io_ok && refCountReachedZero && iceConn->skip_want_to_close))) { /* * Set flag so we free the connection as soon as possible. */ iceConn->free_asap = True; status = IceClosedASAP; } if (iceConn->io_ok && iceConn->dispatch_level == 0 && !iceConn->skip_want_to_close && refCountReachedZero) { /* * Initiate shutdown negotiation. */ IceSimpleMessage (iceConn, 0, ICE_WantToClose); IceFlush (iceConn); iceConn->want_to_close = 1; status = IceStartedShutdownNegotiation; } else if (iceConn->dispatch_level == 0 && (!iceConn->io_ok || (iceConn->io_ok && iceConn->skip_want_to_close && (iceConn->free_asap || (!iceConn->free_asap && refCountReachedZero))))) { /* * Free the connection. */ _IceFreeConnection (iceConn); status = IceClosedNow; } return (status); } void _IceFreeConnection (iceConn) IceConn iceConn; { if (iceConn->listen_obj == NULL) { /* * This iceConn was created with IceOpenConnection. * We keep track of all open IceConn's, so we need * to remove it from the list. */ int i; for (i = 0; i < _IceConnectionCount; i++) if (_IceConnectionObjs[i] == iceConn) break; if (i < _IceConnectionCount) { if (i < _IceConnectionCount - 1) { _IceConnectionObjs[i] = _IceConnectionObjs[_IceConnectionCount - 1]; _IceConnectionStrings[i] = _IceConnectionStrings[_IceConnectionCount - 1]; } _IceConnectionCount--; } } if (iceConn->trans_conn) _IceTransClose (iceConn->trans_conn); if (iceConn->connection_string) free (iceConn->connection_string); if (iceConn->vendor) free (iceConn->vendor); if (iceConn->release) free (iceConn->release); if (iceConn->inbuf) free (iceConn->inbuf); if (iceConn->outbuf) free (iceConn->outbuf); if (iceConn->scratch) free (iceConn->scratch); if (iceConn->process_msg_info) free ((char *) iceConn->process_msg_info); if (iceConn->connect_to_you) free ((char *) iceConn->connect_to_you); if (iceConn->protosetup_to_you) free ((char *) iceConn->protosetup_to_you); if (iceConn->connect_to_me) free ((char *) iceConn->connect_to_me); if (iceConn->protosetup_to_me) free ((char *) iceConn->protosetup_to_me); free ((char *) iceConn); }