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Annotation of driverkit/libDriver/User/ddmServer.m, revision 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: /*     Copyright (c) 1991 NeXT Computer, Inc.  All rights reserved. 
        !            25:  *
        !            26:  * ddmServer.m - user-level ddm server module.
        !            27:  *
        !            28:  * HISTORY
        !            29:  * 22-Feb-91    Doug Mitchell at NeXT
        !            30:  *      Created. 
        !            31:  */
        !            32: 
        !            33: #import <bsd/sys/types.h>
        !            34: #import <driverkit/debugging.h>
        !            35: #import <driverkit/ddmPrivate.h>
        !            36: #import <driverkit/debuggingMsg.h>
        !            37: #import <driverkit/generalFuncs.h>
        !            38: #ifdef KERNEL
        !            39: #import <m68k/dev/ldd.h>
        !            40: #import <mach/mach_interface.h>
        !            41: #else  KERNEL
        !            42: #import <mach/mach.h>
        !            43: #import <bsd/libc.h>
        !            44: #endif KERNEL
        !            45: #import <servers/netname.h>
        !            46: #import <machkit/NXLock.h>
        !            47: 
        !            48: static void ddmGetString(IODDMMsg *msgp);
        !            49: 
        !            50: /*
        !            51:  * xpr server thread. This advertises specified port name with the nmserver,
        !            52:  * the looops waiting for incoming requests from an XPR Viewer app. These
        !            53:  * requests are generally either IODDMMasks set operations or requests for
        !            54:  * strings cooked up from xprArray. 
        !            55:  */
        !            56: volatile void xprServerThread(char *portName)
        !            57: {
        !            58:        port_name_t xprServerPort, sigPort;
        !            59:        kern_return_t krtn;
        !            60:        netname_name_t regname;
        !            61:        IODDMMsg *msgp;
        !            62:        
        !            63: 
        !            64:        /*
        !            65:         * Set up port which external utility uses to communicate with us.
        !            66:         */
        !            67:        krtn = port_allocate(task_self(), &xprServerPort);
        !            68:        if(krtn) {
        !            69:                IOLog("xprServerThread: port_allocate returned %d\n", krtn);
        !            70:                IOExitThread();
        !            71:        }
        !            72:        krtn = port_allocate(task_self(), &sigPort);
        !            73:        if(krtn) {
        !            74:                IOLog("xprServerThread: port_allocate returned %d\n", krtn);
        !            75:                IOExitThread();
        !            76:        }
        !            77:        strcpy(regname, portName);
        !            78:        krtn = netname_check_in(name_server_port,
        !            79:                regname,
        !            80:                sigPort,
        !            81:                xprServerPort);
        !            82:        if(krtn) {
        !            83:                IOLog("xprServerThread: netname_check_in returned %d\n", krtn);
        !            84:                IOExitThread();
        !            85:        }
        !            86: 
        !            87:        msgp = IOMalloc(sizeof(*msgp));
        !            88:        
        !            89:        /*
        !            90:         * Main loop. 
        !            91:         */
        !            92:        while(1) {
        !            93:                msgp->header.msg_local_port = xprServerPort;
        !            94:                msgp->header.msg_size = sizeof(*msgp);
        !            95:                krtn = msg_receive(&msgp->header, MSG_OPTION_NONE, 0);
        !            96:                if(krtn) {
        !            97:                        IOLog("xprServerThread: msg_receive returned %d\n",
        !            98:                                krtn);
        !            99:                        continue;
        !           100:                }
        !           101:                msgp->status = IO_DDM_SUCCESS;
        !           102:                switch(msgp->header.msg_id) {
        !           103:                    case IO_LOCK_DDM_MSG:
        !           104:                        [xprLock lock];
        !           105:                        xprLocked = 1;
        !           106:                        [xprLock unlock];
        !           107:                        break;
        !           108:                    case IO_UNLOCK_DDM_MSG:
        !           109:                        [xprLock lock];
        !           110:                        xprLocked = 0;
        !           111:                        [xprLock unlock];
        !           112:                        break;
        !           113:                    case IO_GET_DDM_ENTRY_MSG:
        !           114:                        ddmGetString(msgp);
        !           115:                        break;
        !           116:                    case IO_SET_DDM_MASK_MSG:
        !           117:                        IOSetDDMMask(msgp->index, msgp->maskValue);
        !           118:                        break;
        !           119:                    case IO_CLEAR_DDM_MSG:
        !           120:                        IOClearDDM();
        !           121:                        break;
        !           122:                    default:
        !           123:                        IOLog("xprServerThread: bogus msg_id (0x%x)\n",
        !           124:                                (u_int)msgp->header.msg_id);
        !           125:                        break;
        !           126:                }
        !           127:                
        !           128:                /*
        !           129:                 * Return message.
        !           130:                 */
        !           131:                krtn = msg_send(&msgp->header, MSG_OPTION_NONE, 0);
        !           132:                if(krtn) {
        !           133:                        IOLog("xprServerThread: msg_send returned %d\n", krtn);
        !           134:                        continue;
        !           135:                }
        !           136:                
        !           137:        }
        !           138:        /* NOT REACHED */       
        !           139: }
        !           140: 
        !           141: /*
        !           142:  * Cook up one xpr string from the entry in xprArray[msgp->index] prior to 
        !           143:  * xprLast, stash it in msgp->string. xprLocked really should be true here, but
        !           144:  * if it isn't, that's the XPRViewer utility's problem.
        !           145:  */
        !           146: static void ddmGetString(IODDMMsg *msgp)
        !           147: {
        !           148:        unsigned long long timestamp;
        !           149:        
        !           150:        if(IOGetDDMEntry(msgp->index,
        !           151:                IO_DDM_STRING_LENGTH,
        !           152:                msgp->string,
        !           153:                &timestamp,
        !           154:                &msgp->cpuNumber)) {
        !           155:                
        !           156:                msgp->status = IO_NO_DDM_BUFFER;
        !           157:        }
        !           158:        else {
        !           159:                msgp->timestampLowInt = (unsigned)timestamp; 
        !           160:                msgp->timestampHighInt  = (unsigned)(timestamp >> 32);
        !           161:        }
        !           162:        return;
        !           163: }

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