lib/base/ebase.cpp

   1 #include <lib/base/ebase.h>
   2
   3 #include <fcntl.h>
   4 #include <unistd.h>
   5 #include <errno.h>
   6
   7 #include <lib/base/eerror.h>
   8 #include <lib/base/elock.h>
   9
  10 eSocketNotifier::eSocketNotifier(eMainloop *context, int fd, int requested, bool startnow): context(*context), fd(fd), state(0), requested(requested)
  11 {
  12         if (startnow)
  13                 start();
  14 }
  15
  16 eSocketNotifier::~eSocketNotifier()
  17 {
  18         stop();
  19 }
  20
  21 void eSocketNotifier::start()
  22 {
  23         if (state)
  24                 stop();
  25
  26         context.addSocketNotifier(this);
  27         state=1;
  28 }
  29
  30 void eSocketNotifier::stop()
  31 {
  32         if (state)
  33                 context.removeSocketNotifier(this);
  34
  35         state=0;
  36 }
  37
  38                                         // timer
  39 void eTimer::start(long msek, bool singleShot)
  40 {
  41         if (bActive)
  42                 stop();
  43
  44         bActive = true;
  45         bSingleShot = singleShot;
  46         interval = msek;
  47         gettimeofday(&nextActivation, 0);
  48 //      eDebug("this = %p\nnow sec = %d, usec = %d\nadd %d msec", this, nextActivation.tv_sec, nextActivation.tv_usec, msek);
  49         nextActivation += (msek<0 ? 0 : msek);
  50 //      eDebug("next Activation sec = %d, usec = %d", nextActivation.tv_sec, nextActivation.tv_usec );
  51         context.addTimer(this);
  52 }
  53
  54 void eTimer::startLongTimer( int seconds )
  55 {
  56         if (bActive)
  57                 stop();
  58
  59         bActive = bSingleShot = true;
  60         interval = 0;
  61         gettimeofday(&nextActivation, 0);
  62 //      eDebug("this = %p\nnow sec = %d, usec = %d\nadd %d sec", this, nextActivation.tv_sec, nextActivation.tv_usec, seconds);
  63         if ( seconds > 0 )
  64                 nextActivation.tv_sec += seconds;
  65 //      eDebug("next Activation sec = %d, usec = %d", nextActivation.tv_sec, nextActivation.tv_usec );
  66         context.addTimer(this);
  67 }
  68
  69 void eTimer::stop()
  70 {
  71         if (bActive)
  72         {
  73                 bActive=false;
  74                 context.removeTimer(this);
  75         }
  76 }
  77
  78 void eTimer::changeInterval(long msek)
  79 {
  80         if (bActive)  // Timer is running?
  81         {
  82                 context.removeTimer(this);       // then stop
  83                 nextActivation -= interval;  // sub old interval
  84         }
  85         else
  86                 bActive=true; // then activate Timer
  87
  88         interval = msek;                                                // set new Interval
  89         nextActivation += interval;             // calc nextActivation
  90
  91         context.addTimer(this);                         // add Timer to context TimerList
  92 }
  93
  94 void eTimer::activate()   // Internal Funktion... called from eApplication
  95 {
  96         context.removeTimer(this);
  97
  98         if (!bSingleShot)
  99         {
 100                 nextActivation += interval;
 101                 context.addTimer(this);
 102         }
 103         else
 104                 bActive=false;
 105
 106         /*emit*/ timeout();
 107 }
 108
 109 void eTimer::addTimeOffset( int offset )
 110 {
 111         nextActivation.tv_sec += offset;
 112 }
 113
 114 // mainloop
 115 ePtrList<eMainloop> eMainloop::existing_loops;
 116
 117 void eMainloop::addSocketNotifier(eSocketNotifier *sn)
 118 {
 119         int fd = sn->getFD();
 120         ASSERT(notifiers.find(fd) == notifiers.end());
 121         notifiers[fd]=sn;
 122 }
 123
 124 void eMainloop::removeSocketNotifier(eSocketNotifier *sn)
 125 {
 126         for (std::map<int,eSocketNotifier*>::iterator i = notifiers.find(sn->getFD());
 127                         i != notifiers.end();
 128                         ++i)
 129                 if (i->second == sn)
 130                         return notifiers.erase(i);
 131         eFatal("removed socket notifier which is not present");
 132 }
 133
 134 int eMainloop::processOneEvent(unsigned int user_timeout, PyObject **res, PyObject *additional)
 135 {
 136         int return_reason = 0;
 137                 /* get current time */
 138         timeval now;
 139         gettimeofday(&now, 0);
 140         m_now_is_invalid = 0;
 141
 142         if (additional && !PyDict_Check(additional))
 143                 eFatal("additional, but it's not dict");
 144
 145         if (additional && !res)
 146                 eFatal("additional, but no res");
 147
 148         int poll_timeout = -1; /* infinite in case of empty timer list */
 149
 150         if (m_timer_list)
 151         {
 152                 singleLock s(recalcLock);
 153                 poll_timeout = timeval_to_usec(m_timer_list.begin()->getNextActivation() - now);
 154                         /* if current timer already passed, don't delay infinite. */
 155                 if (poll_timeout < 0)
 156                         poll_timeout = 0;
 157
 158                         /* convert us to ms */
 159                 poll_timeout /= 1000;
 160         }
 161
 162         if ((user_timeout > 0) && (poll_timeout > 0) && ((unsigned int)poll_timeout > user_timeout))
 163         {
 164                 poll_timeout = user_timeout;
 165                 return_reason = 1;
 166         }
 167
 168         int nativecount=notifiers.size(),
 169                 fdcount=nativecount,
 170                 ret=0;
 171
 172         if (additional)
 173                 fdcount += PyDict_Size(additional);
 174
 175                 // build the poll aray
 176         pollfd pfd[fdcount];  // make new pollfd array
 177         std::map<int,eSocketNotifier*>::iterator it = notifiers.begin();
 178         int i=0;
 179         for (; i < nativecount; ++i, ++it)
 180         {
 181                 pfd[i].fd = it->first;
 182                 pfd[i].events = it->second->getRequested();
 183         }
 184
 185         if (additional)
 186         {
 187                 PyObject *key, *val;
 188                 int pos=0;
 189                 while (PyDict_Next(additional, &pos, &key, &val)) {
 190                         pfd[i].fd = PyObject_AsFileDescriptor(key);
 191                         pfd[i++].events = PyInt_AsLong(val);
 192                 }
 193         }
 194
 195         ret = ::poll(pfd, fdcount, poll_timeout);
 196                         /* ret > 0 means that there are some active poll entries. */
 197         if (ret > 0)
 198         {
 199                 int i=0;
 200                 return_reason = 0;
 201                 for (; i < nativecount ; ++i)
 202                 {
 203                         if (pfd[i].revents)
 204                         {
 205                                 int handled = 0;
 206                                 it = notifiers.find(pfd[i].fd);
 207                                 if (it != notifiers.end())
 208                                 {
 209                                         int req = it->second->getRequested();
 210                                         handled |= req;
 211                                         if (pfd[i].revents & req)
 212                                                 it->second->activate(pfd[i].revents);
 213                                 }
 214                                 pfd[i].revents &= ~handled;
 215                                 if (pfd[i].revents & (POLLERR|POLLHUP|POLLNVAL))
 216                                         eDebug("poll: unhandled POLLERR/HUP/NVAL for fd %d(%d)", pfd[i].fd, pfd[i].revents);
 217                         }
 218                 }
 219                 for (; i < fdcount; ++i)
 220                 {
 221                         if (pfd[i].revents)
 222                         {
 223                                 if (!*res)
 224                                         *res = PyList_New(0);
 225                                 PyObject *it = PyTuple_New(2);
 226                                 PyTuple_SET_ITEM(it, 0, PyInt_FromLong(pfd[i].fd));
 227                                 PyTuple_SET_ITEM(it, 1, PyInt_FromLong(pfd[i].revents));
 228                                 PyList_Append(*res, it);
 229                                 Py_DECREF(it);
 230                         }
 231                 }
 232
 233                 ret = 1; /* poll did not timeout. */
 234         } else if (ret < 0)
 235         {
 236                         /* when we got a signal, we get EINTR. */
 237                 if (errno != EINTR)
 238                         eDebug("poll made error (%m)");
 239                 else
 240                 {
 241                         return_reason = 2;
 242                         ret = -1; /* don't assume the timeout has passed when we got a signal */
 243                 }
 244         }
 245
 246                 /* when we not processed anything, check timers. */
 247         if (!m_timer_list.empty())
 248         {
 249                         /* we know that this time has passed. */
 250                 singleLock s(recalcLock);
 251
 252                 if (ret || m_now_is_invalid)
 253                         gettimeofday(&now, 0);
 254                 else
 255                         now += poll_timeout;
 256
 257                         /* process all timers which are ready. first remove them out of the list. */
 258                 while ((!m_timer_list.empty()) && (m_timer_list.begin()->getNextActivation() <= now))
 259                         m_timer_list.begin()->activate();
 260         }
 261
 262         return return_reason;
 263 }
 264
 265 void eMainloop::addTimer(eTimer* e)
 266 {
 267         m_timer_list.insert_in_order(e);
 268 }
 269
 270 void eMainloop::removeTimer(eTimer* e)
 271 {
 272         m_timer_list.remove(e);
 273 }
 274
 275 int eMainloop::iterate(unsigned int user_timeout, PyObject **res, PyObject *dict)
 276 {
 277         int ret = 0;
 278
 279         timeval user_timer;
 280         gettimeofday(&user_timer, 0);
 281         user_timer += user_timeout;
 282
 283                 /* TODO: this code just became ugly. fix that. */
 284         do
 285         {
 286                 if (m_interrupt_requested)
 287                 {
 288                         m_interrupt_requested = 0;
 289                         return 0;
 290                 }
 291                 if (app_quit_now) return -1;
 292                 timeval now, timeout;
 293                 gettimeofday(&now, 0);
 294                 timeout = user_timer - now;
 295
 296                 if (user_timeout && (user_timer <= now))
 297                         return 0;
 298
 299                 int to = 0;
 300                 if (user_timeout)
 301                         to = timeout.tv_sec * 1000 + timeout.tv_usec / 1000;
 302
 303                 ret = processOneEvent(to, res, dict);
 304                 if (res && *res)
 305                         return ret;
 306         } while (ret == 0);
 307
 308         return ret;
 309 }
 310
 311 int eMainloop::runLoop()
 312 {
 313         while (!app_quit_now)
 314                 iterate();
 315         return retval;
 316 }
 317
 318 void eMainloop::reset()
 319 {
 320         app_quit_now=false;
 321 }
 322
 323 PyObject *eMainloop::poll(PyObject *timeout, PyObject *dict)
 324 {
 325         PyObject *res = 0;
 326
 327         if (app_quit_now)
 328         {
 329                 Py_INCREF(Py_None);
 330                 return Py_None;
 331         }
 332
 333         int user_timeout = (timeout == Py_None) ? 0 : PyInt_AsLong(timeout);
 334
 335         iterate(user_timeout, &res, dict);
 336
 337         if (!res) /* return empty list on timeout */
 338                 res = PyList_New(0);
 339
 340         return res;
 341 }
 342
 343 void eMainloop::interruptPoll()
 344 {
 345         m_interrupt_requested = 1;
 346 }
 347
 348 void eMainloop::quit(int ret)
 349 {
 350         retval = ret;
 351         app_quit_now = true;
 352 }
 353
 354 void eMainloop::addTimeOffset(int offset)
 355 {
 356         for (ePtrList<eMainloop>::iterator it(eMainloop::existing_loops)
 357                 ;it != eMainloop::existing_loops.end(); ++it)
 358         {
 359                 singleLock s(it->recalcLock);
 360                 it->m_now_is_invalid = 1;
 361                 for (ePtrList<eTimer>::iterator tit = it->m_timer_list.begin(); tit != it->m_timer_list.end(); ++tit )
 362                         tit->addTimeOffset(offset);
 363         }
 364 }
 365
 366 eApplication* eApp = 0;