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
 169         if (poll_timeout)
 170         {
 171                 std::multimap<int,eSocketNotifier*>::iterator it;
 172                 std::map<int,int> fd_merged;
 173                 std::map<int,int>::const_iterator fd_merged_it;
 174
 175                 for (it = notifiers.begin(); it != notifiers.end(); ++it)
 176                         fd_merged[it->first] |= it->second->getRequested();
 177
 178                 fd_merged_it = fd_merged.begin();
 179
 180                 int nativecount, fdcount;
 181
 182                 nativecount = fdcount = fd_merged.size();
 183
 184                 if (additional)
 185                 {
 186                         additional = PyDict_Items(additional);
 187                         fdcount += PyList_Size(additional);
 188                 }
 189
 190                         // build the poll aray
 191                 pollfd* pfd = new pollfd[fdcount];  // make new pollfd array
 192
 193                 for (int i=0; i < nativecount; i++, fd_merged_it++)
 194                 {
 195                         pfd[i].fd = fd_merged_it->first;
 196                         pfd[i].events = fd_merged_it->second;
 197                 }
 198
 199                 if (additional)
 200                 {
 201                         for (int i=0; i < PyList_Size(additional); ++i)
 202                         {
 203                                 PyObject *it = PyList_GET_ITEM(additional, i);
 204                                 if (!PyTuple_Check(it))
 205                                         eFatal("poll item is not a tuple");
 206                                 if (PyTuple_Size(it) != 2)
 207                                         eFatal("poll tuple size is not 2");
 208                                 int fd = PyObject_AsFileDescriptor(PyTuple_GET_ITEM(it, 0));
 209                                 if (fd == -1)
 210                                         eFatal("poll tuple not a filedescriptor");
 211                                 pfd[nativecount + i].fd = fd;
 212                                 pfd[nativecount + i].events = PyInt_AsLong(PyTuple_GET_ITEM(it, 1));
 213                         }
 214                 }
 215
 216                 ret = ::poll(pfd, fdcount, poll_timeout);
 217
 218                         /* ret > 0 means that there are some active poll entries. */
 219                 if (ret > 0)
 220                 {
 221                         return_reason = 0;
 222                         for (int i=0; i < nativecount ; i++)
 223                         {
 224                                 it = notifiers.begin();
 225
 226                                 int handled = 0;
 227
 228                                 std::multimap<int,eSocketNotifier*>::iterator
 229                                         l = notifiers.lower_bound(pfd[i].fd),
 230                                         u = notifiers.upper_bound(pfd[i].fd);
 231
 232                                 ePtrList<eSocketNotifier> n;
 233
 234                                 for (; l != u; ++l)
 235                                         n.push_back(l->second);
 236
 237                                 for (ePtrList<eSocketNotifier>::iterator li(n.begin()); li != n.end(); ++li)
 238                                 {
 239                                         int req = li->getRequested();
 240
 241                                         handled |= req;
 242
 243                                         if (pfd[i].revents & req)
 244                                                 (*li)->activate(pfd[i].revents);
 245                                 }
 246                                 if ((pfd[i].revents&~handled) & (POLLERR|POLLHUP|POLLNVAL))
 247                                         eDebug("poll: unhandled POLLERR/HUP/NVAL for fd %d(%d)", pfd[i].fd, pfd[i].revents);
 248                         }
 249
 250                         for (int i = nativecount; i < fdcount; ++i)
 251                         {
 252                                 if (pfd[i].revents)
 253                                 {
 254                                         if (!*res)
 255                                                 *res = PyList_New(0);
 256                                         PyObject *it = PyTuple_New(2);
 257                                         PyTuple_SET_ITEM(it, 0, PyInt_FromLong(pfd[i].fd));
 258                                         PyTuple_SET_ITEM(it, 1, PyInt_FromLong(pfd[i].revents));
 259                                         PyList_Append(*res, it);
 260                                         Py_DECREF(it);
 261                                 }
 262                         }
 263
 264                         ret = 1; /* poll did not timeout. */
 265                 } else if (ret < 0)
 266                 {
 267                                 /* when we got a signal, we get EINTR. */
 268                         if (errno != EINTR)
 269                                 eDebug("poll made error (%m)");
 270                         else
 271                         {
 272                                 return_reason = 2;
 273                                 ret = -1; /* don't assume the timeout has passed when we got a signal */
 274                         }
 275                 }
 276                 delete [] pfd;
 277                 Py_XDECREF(additional);
 278         }
 279
 280                 /* when we not processed anything, check timers. */
 281         if (!ret)
 282         {
 283                         /* we know that this time has passed. */
 284                 now += poll_timeout;
 285
 286                 singleLock s(recalcLock);
 287
 288                         /* this will never change while we have the recalcLock */
 289                         /* we can savely return here, the timer will be re-checked soon. */
 290                 if (m_now_is_invalid)
 291                         return 0;
 292
 293                         /* process all timers which are ready. first remove them out of the list. */
 294                 while ((!m_timer_list.empty()) && (m_timer_list.begin()->getNextActivation() <= now))
 295                         m_timer_list.begin()->activate();
 296         }
 297
 298         return return_reason;
 299 }
 300
 301 void eMainloop::addTimer(eTimer* e)
 302 {
 303         m_timer_list.insert_in_order(e);
 304 }
 305
 306 void eMainloop::removeTimer(eTimer* e)
 307 {
 308         m_timer_list.remove(e);
 309 }
 310
 311 int eMainloop::iterate(unsigned int user_timeout, PyObject **res, PyObject *dict)
 312 {
 313         int ret = 0;
 314
 315         do
 316         {
 317                 if (app_quit_now) return -1;
 318                 ret = processOneEvent(user_timeout, res, dict);
 319                 if (res && *res)
 320                         return ret;
 321         } while (ret == 0);
 322
 323         return ret;
 324 }
 325
 326 int eMainloop::runLoop()
 327 {
 328         while (!app_quit_now)
 329                 iterate();
 330         return retval;
 331 }
 332
 333 PyObject *eMainloop::poll(PyObject *timeout, PyObject *dict)
 334 {
 335         PyObject *res = 0;
 336
 337         if (app_quit_now)
 338         {
 339                 Py_INCREF(Py_None);
 340                 return Py_None;
 341         }
 342
 343         int user_timeout = (timeout == Py_None) ? 0 : PyInt_AsLong(timeout);
 344
 345         iterate(user_timeout, &res, dict);
 346
 347         if (!res) /* return empty list on timeout */
 348                 res = PyList_New(0);
 349
 350         return res;
 351 }
 352
 353 void eMainloop::quit(int ret)
 354 {
 355         retval = ret;
 356         app_quit_now = true;
 357 }
 358
 359 void eMainloop::addTimeOffset(int offset)
 360 {
 361         for (ePtrList<eMainloop>::iterator it(eMainloop::existing_loops)
 362                 ;it != eMainloop::existing_loops.end(); ++it)
 363         {
 364                 singleLock s(it->recalcLock);
 365                 it->m_now_is_invalid = 1;
 366                 for (ePtrList<eTimer>::iterator tit = it->m_timer_list.begin(); tit != it->m_timer_list.end(); ++tit )
 367                         tit->addTimeOffset(offset);
 368         }
 369 }
 370
 371 eApplication* eApp = 0;