Return to adsp_attention.c CVS log

Up to [Apple Darwin 0.x] / kernel / bsd / netat

Annotation of kernel/bsd/netat/adsp_attention.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:  * dspAttention
                     31:  * 
                     32:  * INPUTS:
                     33:  *     --> ccbRefNum           refnum of connection end
                     34:  *     --> attnCode            client attention code
                     35:  *     --> attnSize            size in bytes of attention data
                     36:  *     --> attnData            pointer to attention data
                     37:  *     --> attnInterval        attention retransmit interval 
                     38:  *                             (ignored by ADSP 1.5 & up)
                     39:  *
                     40:  * OUTPUTS:
                     41:  *     none
                     42:  *
                     43:  * ERRORS:
                     44:  *     errRefNum               bad connection refnum
                     45:  *     errState                connection is not open
                     46:  *     errAttention            attention message too long
                     47:  *     errAborted              request aborted by Remove or Close call
                     48:  */
                     49: int adspAttention(sp, pb)      /* (DSPPBPtr pb) */
                     50:     register struct adspcmd *pb;
                     51:     register CCBPtr sp;
                     52: {
                     53:     int        s;
                     54:     OSErr err;
                     55:     register gbuf_t *mp, *nmp;
                     56:     unsigned char uerr;
                     57:        
                     58:     if (sp == 0) {
                     59:        pb->ioResult = errRefNum;
                     60:        return EINVAL;
                     61:     }
                     62:        
                     63:     if (sp->state != sOpen) {  /* If we're not open, tell user to go away */
                     64:        pb->ioResult = errState;
                     65:        uerr = ENOTCONN;
                     66: l_err:
                     67:        gbuf_set_type(pb->mp, MSG_ERROR);
                     68:        *gbuf_rptr(pb->mp) = uerr;
                     69:        gbuf_wset(pb->mp,1);
                     70:        completepb(sp, pb);
                     71:        return 0;
                     72:     }
                     73:        
                     74:     if (pb->u.attnParams.attnSize > attnBufSize) /* If data too big, bye-bye */
                     75:     {
                     76:        pb->ioResult = errAttention;
                     77:        uerr = ERANGE;
                     78:        goto l_err;
                     79:     }
                     80: 
                     81:     /*
                     82:      * Copy in attention data.
                     83:      */
                     84:     mp = pb->mp;
                     85:     if (pb->u.attnParams.attnSize) {
                     86: 
                     87:   nmp = gbuf_cont(mp);
                     88:   if (gbuf_len(mp) > sizeof(struct adspcmd)) {
                     89:        if ((nmp = gbuf_dupb(mp)) == 0) {
                     90:                gbuf_wset(mp,sizeof(struct adspcmd));
                     91:            uerr = ENOSR;
                     92:            goto l_err;
                     93:        }
                     94:        gbuf_wset(mp,sizeof(struct adspcmd));
                     95:        gbuf_rinc(nmp,sizeof(struct adspcmd));
                     96:        gbuf_cont(nmp) = gbuf_cont(mp);
                     97:        gbuf_cont(mp) = nmp;
                     98:   }
                     99:     }
                    100:     pb->ioDirection = 1;       /* outgoing attention data */
                    101:     ATDISABLE(s, sp->lock);
                    102:     if (sp->sapb) {            /* Pending attentions already? */
                    103:        qAddToEnd(&sp->sapb, pb); /* Just add to end of queue */
                    104:        ATENABLE(s, sp->lock);
                    105:     } else {
                    106:        sp->sendAttnData = 1;   /* Start off this attention */
                    107:        pb->qLink = 0;
                    108:        sp->sapb = pb;
                    109:        ATENABLE(s, sp->lock);
                    110:        CheckSend(sp);
                    111:     }
                    112:     pb->ioResult = 1;  /* indicate that the IO is not complete */
                    113:     return 0;
                    114: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.