/* * Copyright (c) 2010 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Apple Inc. ("Apple") nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Portions of this software have been released under the following terms: * * (c) Copyright 1989-1993 OPEN SOFTWARE FOUNDATION, INC. * (c) Copyright 1989-1993 HEWLETT-PACKARD COMPANY * (c) Copyright 1989-1993 DIGITAL EQUIPMENT CORPORATION * * To anyone who acknowledges that this file is provided "AS IS" * without any express or implied warranty: * permission to use, copy, modify, and distribute this file for any * purpose is hereby granted without fee, provided that the above * copyright notices and this notice appears in all source code copies, * and that none of the names of Open Software Foundation, Inc., Hewlett- * Packard Company or Digital Equipment Corporation be used * in advertising or publicity pertaining to distribution of the software * without specific, written prior permission. Neither Open Software * Foundation, Inc., Hewlett-Packard Company nor Digital * Equipment Corporation makes any representations about the suitability * of this software for any purpose. * * Copyright (c) 2007, Novell, Inc. All rights reserved. * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Novell Inc. nor the names of its contributors * may be used to endorse or promote products derived from this * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * @APPLE_LICENSE_HEADER_END@ */ /* ** ** NAME ** ** cnid.c ** ** FACILITY: ** ** Remote Procedure Call (RPC) ** ** ABSTRACT: ** ** The Local Identifier Service. ** ** */ #include <commonp.h> /* Common declarations for all RPC runtime */ #include <com.h> /* Common communications services */ #include <comprot.h> /* Common protocol services */ #include <cnp.h> /* NCA Connection private declarations */ #include <cnid.h> /* * INTERNAL variables. */ INTERNAL unsigned16 seqnum; /***********************************************************************/ /* **++ ** ** ROUTINE NAME: rpc__cn_init_seqnum ** ** SCOPE: PRIVATE - declared in cnid.h ** ** DESCRIPTION: ** ** ** This routine initializes the global sequence number cell and ** corresponding mutex. ** ** A sequence number generated by extracting the lower sixteen bits ** of system time in seconds. ** ** INPUTS: none ** ** INPUTS/OUTPUTS: none ** ** OUTPUTS: none ** ** IMPLICIT INPUTS: none ** ** The system time. ** ** IMPLICIT OUTPUTS: none ** ** The static variable seqnum will contain the lower 16 ** bits of the system time in seconds. ** ** FUNCTION VALUE: none ** ** SIDE EFFECTS: none ** ** ** ** **-- **/ PRIVATE void rpc__cn_init_seqnum (void) { /* * Determine the system time in seconds via the time() C runtime library * call. Use the lower 16 bits of this for the sequence number. */ seqnum = ((unsigned32) time (NULL)) & 0xffff; } /* **++ ** ** ROUTINE NAME: rpc__cn_gen_local_id ** ** SCOPE: PRIVATE - declared in cnid.h ** ** DESCRIPTION: ** ** This routine creates a new local identifier. The index portion ** of the identifier is taken from the index argument passed by the ** caller. ** ** INPUTS: ** ** index Index value to be stored in the local ** identifier being created. ** ** INPUTS/OUTPUTS: none ** ** OUTPUTS: ** ** lcl_id The created local identifier. ** ** IMPLICIT INPUTS: none ** ** IMPLICIT OUTPUTS: none ** ** FUNCTION VALUE: none ** ** SIDE EFFECTS: ** ** The sequence number is incremented. ** **-- **/ PRIVATE void rpc__cn_gen_local_id ( unsigned32 index, rpc_cn_local_id_t *lcl_id ) { /* * Increment it so that the local id being generated will be different that * the last. */ seqnum++; /* * Since zero is defined as being an invalid local id we never want to * generate a local id with a sequence number part of zero (since the index * given may be zero. */ if (seqnum == 0) { seqnum = 1; } /* * Copy the sequence number into the returned local id. */ lcl_id->parts.id_seqnum = seqnum; /* * Put the caller provided index into the returned local id. */ lcl_id->parts.id_index = (unsigned16) index; }