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Annotation of kernel/bsd/netat/adsp_NewCID.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
                      7:  * Reserved.  This file contains Original Code and/or Modifications of
                      8:  * Original Code as defined in and that are subject to the Apple Public
                      9:  * Source License Version 1.1 (the "License").  You may not use this file
                     10:  * except in compliance with the License.  Please obtain a copy of the
                     11:  * License at http://www.apple.com/publicsource and read it before using
                     12:  * this file.
                     13:  * 
                     14:  * The Original Code and all software distributed under the License are
                     15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     19:  * License for the specific language governing rights and limitations
                     20:  * under the License.
                     21:  * 
                     22:  * @APPLE_LICENSE_HEADER_END@
                     23:  */
                     24: 
                     25: 
                     26: #include       <adsp_local.h>
                     27: 
                     28: 
                     29: /*
                     30:  * dspNewCID
                     31:  * 
                     32:  * INPUTS:
                     33:  *     --> ccbRefNum           refnum of connection end
                     34:  *
                     35:  * OUTPUTS:
                     36:  *     <-- newCID              new connection identifier
                     37:  *
                     38:  * ERRORS:
                     39:  *     errRefNum               bad connection refnum
                     40:  *     errState                connection is not closed
                     41:  */
                     42: int adspNewCID(sp, pb)         /* (DSPPBPtr pb) */
                     43:     CCBPtr             sp;
                     44:     struct adspcmd *pb;
                     45: {
                     46:     OSErr err;
                     47:        
                     48:     if (sp == 0) {
                     49:        pb->ioResult = errRefNum;
                     50:        return EINVAL;
                     51:     }
                     52: 
                     53:     if (sp->state != sClosed) {        /* Can only assign to a closed connection */
                     54:        pb->ioResult = errState;
                     55:        return EINVAL;
                     56:     }
                     57: 
                     58:     /*
                     59:      * Assign a unique connection ID to this ccb
                     60:      */
                     61:     sp->locCID = pb->u.newCIDParams.newcid = NextCID();
                     62: 
                     63:     pb->ioResult = 0;
                     64:     adspioc_ack(0, pb->ioc, pb->gref);
                     65:     return 0;
                     66: }

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