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