senf/PPI/Connectors.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2007
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief Connectors non-inline non-template implementation */
  25
  26 #include "Connectors.hh"
  27 #include "Connectors.ih"
  28
  29 // Custom includes
  30 #include "Route.hh"
  31 #include "Module.hh"
  32 #include "ModuleManager.hh"
  33 #include "../Utils/Console/Console.hh"
  34
  35 //#include "Connectors.mpp"
  36 #define prefix_
  37 ///////////////////////////////cc.p////////////////////////////////////////
  38
  39 ///////////////////////////////////////////////////////////////////////////
  40 // senf::ppi::connector::Connector
  41
  42 prefix_ void senf::ppi::connector::Connector::connect(Connector & target)
  43 {
  44     // The connector is not registered -> route() or noroute() statement missing
  45     SENF_ASSERT( module_ &&
  46                  "senf::ppi::connector::Connector::connect(): (source) "
  47                  "Missing route() or noroute()" );
  48     // The connector is already connected
  49     SENF_ASSERT( ! peer_ &&
  50                  "senf::ppi::connector::Connector::connect(): (source) "
  51                  "duplicate connection" );
  52     // The target connector is not registered -> route() or noroute() statement missing
  53     SENF_ASSERT( target.module_ &&
  54                  "senf::ppi::connector::Connector::connect(): (target) "
  55                  "Missing route() or noroute()" );
  56     // The target connector is already connected
  57     SENF_ASSERT( ! target.peer_ &&
  58                  "senf::ppi::connector::Connector::connect(): (target) "
  59                  "duplicate connection" );
  60     if (! (packetTypeID() == typeid(void) ||
  61            target.packetTypeID() == typeid(void) ||
  62            packetTypeID() == target.packetTypeID()) )
  63         throw IncompatibleConnectorsException()
  64             << ": " << prettyName(packetTypeID())
  65             << " [in module " << prettyName(typeid(*module_))  << "] "
  66             << ", " << prettyName(target.packetTypeID())
  67             << " [in module " << prettyName(typeid(*target.module_)) << "]";
  68
  69     peer_ = & target;
  70     target.peer_ = this;
  71
  72     if (! initializationScheduled())
  73         enqueueInitializable();
  74     if (! peer().initializationScheduled())
  75         peer().enqueueInitializable();
  76 }
  77
  78 senf::ppi::connector::Connector::TraceState senf::ppi::connector::Connector::traceState_ (
  79     senf::ppi::connector::Connector::NO_TRACING);
  80
  81 prefix_ void senf::ppi::connector::Connector::trace(Packet const & p, char const * label)
  82 {
  83     if (traceState_ ==  NO_TRACING)
  84         return;
  85     SENF_LOG_BLOCK(({
  86                 std::string type (prettyName(p.typeId().id()));
  87                 log << "PPI packet trace: " << label << " 0x" << std::hex << p.id() << " "
  88                     << type.substr(21, type.size()-22) << " on " << & module() << " "
  89                     << prettyName(typeid(module())) << " connector 0x" << this << "\n";
  90                 if (traceState_ == TRACE_CONTENTS)
  91                     p.dump(log);
  92             }));
  93 }
  94
  95 prefix_ void senf::ppi::connector::Connector::throttleTrace(char const * label,
  96                                                             char const * type)
  97 {
  98     if (traceState_ == NO_TRACING)
  99         return;
 100     SENF_LOG_BLOCK(({
 101                 log << "PPI throttling trace: " << label << " " << type << " on " << & module()
 102                     << " " << prettyName(typeid(module())) << " connector 0x" << this << "\n";
 103             }));
 104 }
 105
 106 namespace senf { namespace ppi { namespace connector {
 107
 108     SENF_CONSOLE_REGISTER_ENUM_MEMBER(
 109         Connector, TraceState, (NO_TRACING)(TRACE_IDS)(TRACE_CONTENTS) );
 110
 111 }}}
 112
 113 namespace {
 114
 115     struct ConsoleRegister
 116     {
 117         ConsoleRegister();
 118     };
 119
 120     ConsoleRegister::ConsoleRegister()
 121     {
 122         senf::ppi::ModuleManager::instance().consoleDir()
 123             .add("tracing", SENF_FNP(senf::ppi::connector::Connector::TraceState,
 124                                      senf::ppi::connector::Connector::tracing, ()))
 125             .doc("Log every packet sent or received by any module.\n"
 126                  "There are three different tracing levels:\n"
 127                  "\n"
 128                  "    NO_TRACING      don't output any tracing information\n"
 129                  "    TRACE_IDS       trace packet id's but do not show packet contents\n"
 130                  "    TRACE_CONTENTS  trace complete packet contents\n"
 131                  "\n"
 132                  "A log message is generated whenever the packet traverses a connector. The\n"
 133                  "TRACE_IDS log message has the following format:\n"
 134                  "\n"
 135                  "    PPI packet trace: <direction> <packet-id> <packet-type>\n"
 136                  "                      on <module-id> <module-type> connector <connector-id>\n"
 137                  "    PPI throttling trace: <direction> <throttle-msg>\n"
 138                  "                      on <module-id> <module-type> connector <connector-id>\n"
 139                  "\n"
 140                  "The fields are:\n"
 141                  "\n"
 142                  "    direction       'IN' for packets/throttle notifications entering the module,\n"
 143                  "                    'OUT' for packets/throttle notifications leaving it\n"
 144                  "    packet-id       Numeric unique packet id. This value is unique for packets\n"
 145                  "                    alive at the same time, packets at different times may (and\n"
 146                  "                    will) share id's\n"
 147                  "    packet-type     The type of the packet header\n"
 148                  "    module-id       Unique module id\n"
 149                  "    module-type     Type of the module the packet is sent to/from\n"
 150                  "    connector-id    Unique connector id\n"
 151                  "    throttle-msg    Type of throttling event\n");
 152
 153         senf::ppi::ModuleManager::instance().consoleDir()
 154             .add("tracing", SENF_FNP(void, senf::ppi::connector::Connector::tracing,
 155                                      (senf::ppi::connector::Connector::TraceState)))
 156             .arg("state", "new tracing state");
 157     }
 158
 159     ConsoleRegister consoleRegister;
 160
 161 }
 162
 163 prefix_ void senf::ppi::connector::Connector::disconnect()
 164 {
 165     // Cannot disconnected a non-connected connector
 166     SENF_ASSERT( peer_ &&
 167                  "senf::ppi::connector::Connector::disconnect(): Not connected" );
 168     Connector & peer (*peer_);
 169     peer_ = 0;
 170     peer.peer_ = 0;
 171
 172     if (! initializationScheduled())
 173         enqueueInitializable();
 174     if (! peer.initializationScheduled())
 175         peer.enqueueInitializable();
 176 }
 177
 178 prefix_ std::type_info const & senf::ppi::connector::Connector::packetTypeID()
 179 {
 180     return typeid(void);
 181 }
 182
 183 ///////////////////////////////////////////////////////////////////////////
 184 // senf::ppi::connector::PassiveConnector
 185
 186 ////////////////////////////////////////
 187 // private members
 188
 189 prefix_ void senf::ppi::connector::PassiveConnector::v_init()
 190 {
 191     Routes::const_iterator i (routes_.begin());
 192     Routes::const_iterator const i_end (routes_.end());
 193     for (; i != i_end; ++i)
 194         if ((*i)->throttled())
 195             break;
 196     if (i == i_end)
 197         remoteThrottled_ = false;
 198     if (throttled())
 199         emitThrottle();
 200     else
 201         emitUnthrottle();
 202 }
 203
 204 prefix_ void senf::ppi::connector::PassiveConnector::v_unthrottleEvent()
 205 {}
 206
 207 prefix_ void senf::ppi::connector::PassiveConnector::notifyUnthrottle()
 208 {
 209     if (std::find_if(routes_.begin(), routes_.end(),
 210                      boost::bind(&ForwardingRoute::throttled, _1)) == routes_.end()) {
 211         remoteThrottled_ = false;
 212         if (!nativeThrottled_)
 213             emitUnthrottle();
 214     } else
 215         throttleTrace("OUT", "not forwarding unthrottle event");
 216 }
 217
 218 ///////////////////////////////////////////////////////////////////////////
 219 // senf::ppi::connector::ActiveConnector
 220
 221 ////////////////////////////////////////
 222 // private members
 223
 224 prefix_ void senf::ppi::connector::ActiveConnector::v_init()
 225 {
 226     if (! connected())
 227         notifyThrottle();
 228 }
 229
 230 prefix_ void senf::ppi::connector::ActiveConnector::notifyThrottle()
 231 {
 232     throttleTrace("IN ", "throttle");
 233     if (! throttled_) {
 234         throttled_ = true;
 235         if (throttleCallback_)
 236             throttleCallback_();
 237         NotifyRoutes::const_iterator i (notifyRoutes_.begin());
 238         NotifyRoutes::const_iterator const i_end (notifyRoutes_.end());
 239         for (; i != i_end; ++i)
 240             (*i)->notifyThrottle();
 241     }
 242 }
 243
 244 prefix_ void senf::ppi::connector::ActiveConnector::notifyUnthrottle()
 245 {
 246     throttleTrace("IN ", "unthrottle");
 247     if (throttled_) {
 248         throttled_ = false;
 249         if (unthrottleCallback_)
 250             unthrottleCallback_();
 251         NotifyRoutes::const_iterator i (notifyRoutes_.begin());
 252         NotifyRoutes::const_iterator const i_end (notifyRoutes_.end());
 253         for (; i != i_end; ++i)
 254             (*i)->notifyUnthrottle();
 255     }
 256 }
 257
 258 prefix_ void senf::ppi::connector::ActiveConnector::registerRoute(ForwardingRoute & route)
 259 {
 260     notifyRoutes_.push_back(&route);
 261 }
 262
 263 ///////////////////////////////////////////////////////////////////////////
 264 // senf::ppi::connector::InputConnector
 265
 266 prefix_ senf::Packet senf::ppi::connector::InputConnector::operator()()
 267 {
 268     if (empty())
 269         v_requestEvent();
 270     Packet p;
 271     if (! empty()) {
 272         p = peek();
 273         queue_.pop_back();
 274         v_dequeueEvent();
 275     }
 276     trace(p, "IN ");
 277     return p;
 278 }
 279
 280 ////////////////////////////////////////
 281 // private members
 282
 283 prefix_ void senf::ppi::connector::InputConnector::v_requestEvent()
 284 {}
 285
 286 prefix_ void senf::ppi::connector::InputConnector::v_enqueueEvent()
 287 {}
 288
 289 prefix_ void senf::ppi::connector::InputConnector::v_dequeueEvent()
 290 {}
 291
 292 ///////////////////////////////////////////////////////////////////////////
 293 // senf::ppi::connector::GenericActiveInput
 294
 295 ////////////////////////////////////////
 296 // private members
 297
 298 prefix_ void senf::ppi::connector::GenericActiveInput::v_requestEvent()
 299 {
 300     request();
 301 }
 302
 303 ///////////////////////////////////////////////////////////////////////////
 304 // senf::ppi::connector::GenericPassiveInput
 305
 306 ////////////////////////////////////////
 307 // private members
 308
 309 prefix_ void senf::ppi::connector::GenericPassiveInput::v_enqueueEvent()
 310 {
 311     emit();
 312     qdisc_->update(*this, QueueingDiscipline::ENQUEUE);
 313 }
 314
 315 prefix_ void senf::ppi::connector::GenericPassiveInput::v_dequeueEvent()
 316 {
 317     qdisc_->update(*this, QueueingDiscipline::DEQUEUE);
 318 }
 319
 320 prefix_ void senf::ppi::connector::GenericPassiveInput::v_unthrottleEvent()
 321 {
 322     size_type n (queueSize());
 323     while (n) {
 324         emit();
 325         size_type nn (queueSize());
 326         if (n == nn)
 327             break;
 328         n = nn;
 329     }
 330 }
 331
 332 ///////////////////////////////cc.e////////////////////////////////////////
 333 #undef prefix_
 334 //#include "Connectors.mpp"
 335
 336 \f
 337 // Local Variables:
 338 // mode: c++
 339 // fill-column: 100
 340 // comment-column: 40
 341 // c-file-style: "senf"
 342 // indent-tabs-mode: nil
 343 // ispell-local-dictionary: "american"
 344 // compile-command: "scons -u test"
 345 // End: