src/apps/cortex/NodeManager/NodeSyncThread.cpp

   1 /*
   2  * Copyright (c) 1999-2000, Eric Moon.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions, and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions, and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * 3. The name of the author may not be used to endorse or promote products
  17  *    derived from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  27  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31
  32 // NodeSyncThread.cpp
  33
  34 #include "NodeSyncThread.h"
  35
  36 #include <cstring>
  37
  38 #include <Debug.h>
  39 #include <MediaRoster.h>
  40
  41 __USE_CORTEX_NAMESPACE
  42
  43 // -------------------------------------------------------- //
  44 // *** dtor/ctors
  45 // -------------------------------------------------------- //
  46
  47 NodeSyncThread::~NodeSyncThread() {
  48         status_t err;
  49
  50         // clean up
  51         if(m_thread) {
  52                 err = kill_thread(m_thread);
  53                 if(err < B_OK)
  54                         PRINT((
  55                                 "! ~NodeSyncThread(): kill_thread(%" B_PRId32 "):\n"
  56                                 "  %s\n",
  57                                 m_thread,
  58                                 strerror(err)));
  59
  60                 // +++++ is a wait_for_thread() necessary?
  61         }
  62
  63         if(m_port) {
  64                 err = delete_port(m_port);
  65                 if(err < B_OK)
  66                         PRINT((
  67                                 "! ~NodeSyncThread(): delete_port(%" B_PRId32 "):\n"
  68                                 "  %s\n",
  69                                 m_port,
  70                                 strerror(err)));
  71         }
  72
  73         if(m_portBuffer)
  74                 delete [] m_portBuffer;
  75         if(m_messenger)
  76                 delete m_messenger;
  77 }
  78
  79 NodeSyncThread::NodeSyncThread(
  80         const media_node&                                               node,
  81         BMessenger*                                                                     messenger) :
  82
  83         m_node(node),
  84         m_messenger(messenger),
  85         m_syncInProgress(false),
  86         m_thread(0),
  87         m_port(0),
  88         m_portBuffer(0),
  89         m_portBufferSize(sizeof(_sync_op)) {
  90
  91         ASSERT(m_messenger);
  92
  93         m_portBuffer = new char[m_portBufferSize];
  94
  95         m_port = create_port(
  96                 m_portBufferSize * 16,
  97                 "NodeSyncThread___port");
  98         ASSERT(m_port >= B_OK);
  99
 100         m_thread = spawn_thread(
 101                 &_Sync,
 102                 "NodeSyncThread",
 103                 B_DISPLAY_PRIORITY,
 104                 this);
 105         ASSERT(m_thread >= B_OK);
 106         resume_thread(m_thread);
 107 }
 108
 109 // -------------------------------------------------------- //
 110 // *** operations
 111 // -------------------------------------------------------- //
 112
 113 // trigger a sync operation: when 'perfTime' arrives
 114 // for the node, a M_SYNC_COMPLETE message with the given
 115 // position value will be sent,  unless the sync operation
 116 // times out, in which case M_TIMED_OUT will be sent.
 117
 118 status_t NodeSyncThread::sync(
 119         bigtime_t                                                                               perfTime,
 120         bigtime_t                                                                               position,
 121         bigtime_t                                                                               timeout) {
 122
 123         status_t err;
 124
 125         if(m_syncInProgress)
 126                 return B_NOT_ALLOWED;
 127
 128         _sync_op op = {perfTime, position, timeout};
 129         err = write_port(
 130                 m_port,
 131                 M_TRIGGER,
 132                 &op,
 133                 sizeof(_sync_op));
 134
 135         return err;
 136 }
 137
 138 // -------------------------------------------------------- //
 139 // *** guts
 140 // -------------------------------------------------------- //
 141
 142 /*static*/
 143 status_t NodeSyncThread::_Sync(
 144         void*                                                                                           cookie) {
 145         ((NodeSyncThread*)cookie)->_sync();
 146         return B_OK;
 147 }
 148
 149 // THREAD BODY
 150 //
 151 void NodeSyncThread::_sync() {
 152         ASSERT(m_port >= B_OK);
 153         ASSERT(m_messenger);
 154
 155         bool done = false;
 156         while(!done) {
 157
 158                 // WAIT FOR A REQUEST
 159                 int32 code;
 160                 ssize_t readCount = read_port(
 161                         m_port,
 162                         &code,
 163                         m_portBuffer,
 164                         m_portBufferSize);
 165
 166                 if(readCount < B_OK) {
 167                         PRINT((
 168                                 "! NodeSyncThread::_sync(): read_port():\n"
 169                                 "  %s\n",
 170                                 strerror(readCount)));
 171                         continue;
 172                 }
 173
 174                 if(code != M_TRIGGER) {
 175                         PRINT((
 176                                 "! NodeSyncThread::sync(): unknown message code %" B_PRId32
 177                                         "\n", code));
 178                         continue;
 179                 }
 180
 181                 // SERVICE THE REQUEST
 182                 const _sync_op& op = *(_sync_op*)m_portBuffer;
 183
 184                 // pre-fill the message
 185                 BMessage m(M_SYNC_COMPLETE);
 186                 m.AddInt32("nodeID", m_node.node);
 187                 m.AddInt64("perfTime", op.targetTime);
 188                 m.AddInt64("position", op.position);
 189
 190                 // sync
 191                 status_t err = BMediaRoster::Roster()->SyncToNode(
 192                         m_node,
 193                         op.targetTime,
 194                         op.timeout);
 195
 196                 // deliver reply
 197                 if(err < B_OK) {
 198                         m.what = M_SYNC_FAILED;
 199                         m.AddInt32("error", err);
 200                 }
 201
 202                 err = m_messenger->SendMessage(&m);
 203                 if(err < B_OK) {
 204                         PRINT((
 205                                 "! NodeSyncThread::_sync(): m_messenger->SendMessage():\n"
 206                                 "  %s\n",
 207                                 strerror(err)));
 208                 }
 209         }
 210 }
 211
 212
 213 // END -- NodeSyncThread.cpp --