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         notifiers.insert(std::pair<int,eSocketNotifier*> (sn->getFD(), sn));
 120 }
 121
 122 void eMainloop::removeSocketNotifier(eSocketNotifier *sn)
 123 {
 124         for (std::multimap<int,eSocketNotifier*>::iterator i = notifiers.find(sn->getFD());
 125                         i != notifiers.end();
 126                         ++i)
 127                 if (i->second == sn)
 128                         return notifiers.erase(i);
 129         eFatal("removed socket notifier which is not present");
 130 }
 131
 132 int eMainloop::processOneEvent(unsigned int user_timeout, PyObject **res, PyObject *additional)
 133 {
 134         int return_reason = 0;
 135                 /* get current time */
 136         timeval now;
 137         gettimeofday(&now, 0);
 138         m_now_is_invalid = 0;
 139
 140         if (additional && !PyDict_Check(additional))
 141                 eFatal("additional, but it's not dict");
 142
 143         if (additional && !res)
 144                 eFatal("additional, but no res");
 145
 146         int poll_timeout = -1; /* infinite in case of empty timer list */
 147
 148         if (m_timer_list)
 149         {
 150                 singleLock s(recalcLock);
 151                 poll_timeout = timeval_to_usec(m_timer_list.begin()->getNextActivation() - now);
 152                         /* if current timer already passed, don't delay infinite. */
 153                 if (poll_timeout < 0)
 154                         poll_timeout = 0;
 155
 156                         /* convert us to ms */
 157                 poll_timeout /= 1000;
 158         }
 159
 160         if ((user_timeout > 0) && (poll_timeout > 0) && ((unsigned int)poll_timeout > user_timeout))
 161         {
 162                 poll_timeout = user_timeout;
 163                 return_reason = 1;
 164         }
 165
 166         int ret = 0;
 167
 168         std::multimap<int,eSocketNotifier*>::iterator it;
 169         std::map<int,int> fd_merged;
 170         std::map<int,int>::const_iterator fd_merged_it;
 171
 172         for (it = notifiers.begin(); it != notifiers.end(); ++it)
 173                 fd_merged[it->first] |= it->second->getRequested();
 174
 175         fd_merged_it = fd_merged.begin();
 176
 177         int nativecount, fdcount;
 178
 179         nativecount = fdcount = fd_merged.size();
 180
 181         if (additional)
 182         {
 183                 additional = PyDict_Items(additional);
 184                 fdcount += PyList_Size(additional);
 185         }
 186
 187                 // build the poll aray
 188         pollfd pfd[fdcount];  // make new pollfd array
 189
 190         for (int i=0; i < nativecount; i++, fd_merged_it++)
 191         {
 192                 pfd[i].fd = fd_merged_it->first;
 193                 pfd[i].events = fd_merged_it->second;
 194         }
 195
 196         if (additional)
 197         {
 198                 for (int i=0; i < PyList_Size(additional); ++i)
 199                 {
 200                         PyObject *it = PyList_GET_ITEM(additional, i);
 201                         if (!PyTuple_Check(it))
 202                                 eFatal("poll item is not a tuple");
 203                         if (PyTuple_Size(it) != 2)
 204                                 eFatal("poll tuple size is not 2");
 205                         int fd = PyObject_AsFileDescriptor(PyTuple_GET_ITEM(it, 0));
 206                         if (fd == -1)
 207                                 eFatal("poll tuple not a filedescriptor");
 208                         pfd[nativecount + i].fd = fd;
 209                         pfd[nativecount + i].events = PyInt_AsLong(PyTuple_GET_ITEM(it, 1));
 210                 }
 211                 Py_DECREF(additional);
 212         }
 213
 214         ret = ::poll(pfd, fdcount, poll_timeout);
 215
 216                         /* ret > 0 means that there are some active poll entries. */
 217         if (ret > 0)
 218         {
 219                 return_reason = 0;
 220                 for (int i=0; i < nativecount ; i++)
 221                 {
 222                         it = notifiers.begin();
 223
 224                         int handled = 0;
 225
 226                         std::multimap<int,eSocketNotifier*>::iterator
 227                                 l = notifiers.lower_bound(pfd[i].fd),
 228                                 u = notifiers.upper_bound(pfd[i].fd);
 229
 230                         ePtrList<eSocketNotifier> n;
 231
 232                         for (; l != u; ++l)
 233                                 n.push_back(l->second);
 234
 235                         for (ePtrList<eSocketNotifier>::iterator li(n.begin()); li != n.end(); ++li)
 236                         {
 237                                 int req = li->getRequested();
 238
 239                                 handled |= req;
 240
 241                                 if (pfd[i].revents & req)
 242                                         (*li)->activate(pfd[i].revents);
 243                         }
 244                         if ((pfd[i].revents&~handled) & (POLLERR|POLLHUP|POLLNVAL))
 245                                 eDebug("poll: unhandled POLLERR/HUP/NVAL for fd %d(%d)", pfd[i].fd, pfd[i].revents);
 246                 }
 247
 248                 for (int i = nativecount; i < fdcount; ++i)
 249                 {
 250                         if (pfd[i].revents)
 251                         {
 252                                 if (!*res)
 253                                         *res = PyList_New(0);
 254                                 PyObject *it = PyTuple_New(2);
 255                                 PyTuple_SET_ITEM(it, 0, PyInt_FromLong(pfd[i].fd));
 256                                 PyTuple_SET_ITEM(it, 1, PyInt_FromLong(pfd[i].revents));
 257                                 PyList_Append(*res, it);
 258                                 Py_DECREF(it);
 259                         }
 260                 }
 261
 262                 ret = 1; /* poll did not timeout. */
 263         } else if (ret < 0)
 264         {
 265                         /* when we got a signal, we get EINTR. */
 266                 if (errno != EINTR)
 267                         eDebug("poll made error (%m)");
 268                 else
 269                 {
 270                         return_reason = 2;
 271                         ret = -1; /* don't assume the timeout has passed when we got a signal */
 272                 }
 273         }
 274
 275                 /* when we not processed anything, check timers. */
 276         if (!m_timer_list.empty())
 277         {
 278                         /* we know that this time has passed. */
 279                 singleLock s(recalcLock);
 280
 281                 if (ret || m_now_is_invalid)
 282                         gettimeofday(&now, 0);
 283                 else
 284                         now += poll_timeout;
 285
 286                         /* process all timers which are ready. first remove them out of the list. */
 287                 while ((!m_timer_list.empty()) && (m_timer_list.begin()->getNextActivation() <= now))
 288                         m_timer_list.begin()->activate();
 289         }
 290
 291         return return_reason;
 292 }
 293
 294 void eMainloop::addTimer(eTimer* e)
 295 {
 296         m_timer_list.insert_in_order(e);
 297 }
 298
 299 void eMainloop::removeTimer(eTimer* e)
 300 {
 301         m_timer_list.remove(e);
 302 }
 303
 304 int eMainloop::iterate(unsigned int user_timeout, PyObject **res, PyObject *dict)
 305 {
 306         int ret = 0;
 307
 308         timeval user_timer;
 309         gettimeofday(&user_timer, 0);
 310         user_timer += user_timeout;
 311
 312                 /* TODO: this code just became ugly. fix that. */
 313         do
 314         {
 315                 if (m_interrupt_requested)
 316                 {
 317                         m_interrupt_requested = 0;
 318                         return 0;
 319                 }
 320                 if (app_quit_now) return -1;
 321                 timeval now, timeout;
 322                 gettimeofday(&now, 0);
 323                 timeout = user_timer - now;
 324
 325                 if (user_timeout && (user_timer <= now))
 326                         return 0;
 327
 328                 int to = 0;
 329                 if (user_timeout)
 330                         to = timeout.tv_sec * 1000 + timeout.tv_usec / 1000;
 331
 332                 ret = processOneEvent(to, res, dict);
 333                 if (res && *res)
 334                         return ret;
 335         } while (ret == 0);
 336
 337         return ret;
 338 }
 339
 340 int eMainloop::runLoop()
 341 {
 342         while (!app_quit_now)
 343                 iterate();
 344         return retval;
 345 }
 346
 347 void eMainloop::reset()
 348 {
 349         app_quit_now=false;
 350 }
 351
 352 PyObject *eMainloop::poll(PyObject *timeout, PyObject *dict)
 353 {
 354         PyObject *res = 0;
 355
 356         if (app_quit_now)
 357         {
 358                 Py_INCREF(Py_None);
 359                 return Py_None;
 360         }
 361
 362         int user_timeout = (timeout == Py_None) ? 0 : PyInt_AsLong(timeout);
 363
 364         iterate(user_timeout, &res, dict);
 365
 366         if (!res) /* return empty list on timeout */
 367                 res = PyList_New(0);
 368
 369         return res;
 370 }
 371
 372 void eMainloop::interruptPoll()
 373 {
 374         m_interrupt_requested = 1;
 375 }
 376
 377 void eMainloop::quit(int ret)
 378 {
 379         retval = ret;
 380         app_quit_now = true;
 381 }
 382
 383 void eMainloop::addTimeOffset(int offset)
 384 {
 385         for (ePtrList<eMainloop>::iterator it(eMainloop::existing_loops)
 386                 ;it != eMainloop::existing_loops.end(); ++it)
 387         {
 388                 singleLock s(it->recalcLock);
 389                 it->m_now_is_invalid = 1;
 390                 for (ePtrList<eTimer>::iterator tit = it->m_timer_list.begin(); tit != it->m_timer_list.end(); ++tit )
 391                         tit->addTimeOffset(offset);
 392         }
 393 }
 394
 395 eApplication* eApp = 0;