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=2;  // running but not in poll yet
  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         int fd = sn->getFD();
 127         std::map<int,eSocketNotifier*>::iterator i(notifiers.find(fd));
 128         if (i != notifiers.end())
 129                 return notifiers.erase(i);
 130         eFatal("removed socket notifier which is not present");
 131 }
 132
 133 int eMainloop::processOneEvent(unsigned int user_timeout, PyObject **res, ePyObject additional)
 134 {
 135         int return_reason = 0;
 136                 /* get current time */
 137         timeval now;
 138         gettimeofday(&now, 0);
 139         m_now_is_invalid = 0;
 140
 141         if (additional && !PyDict_Check(additional))
 142                 eFatal("additional, but it's not dict");
 143
 144         if (additional && !res)
 145                 eFatal("additional, but no res");
 146
 147         int poll_timeout = -1; /* infinite in case of empty timer list */
 148
 149         if (m_timer_list)
 150         {
 151                 singleLock s(recalcLock);
 152                 poll_timeout = timeval_to_usec(m_timer_list.begin()->getNextActivation() - now);
 153                         /* if current timer already passed, don't delay infinite. */
 154                 if (poll_timeout < 0)
 155                         poll_timeout = 0;
 156                 else /* 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 nativecount=notifiers.size(),
 167                 fdcount=nativecount,
 168                 ret=0;
 169
 170         if (additional)
 171                 fdcount += PyDict_Size(additional);
 172
 173                 // build the poll aray
 174         pollfd pfd[fdcount];  // make new pollfd array
 175         std::map<int,eSocketNotifier*>::iterator it = notifiers.begin();
 176         int i=0;
 177         for (; i < nativecount; ++i, ++it)
 178         {
 179                 it->second->state = 1; // running and in poll
 180                 pfd[i].fd = it->first;
 181                 pfd[i].events = it->second->getRequested();
 182         }
 183
 184         if (additional)
 185         {
 186                 PyObject *key, *val;
 187                 int pos=0;
 188                 while (PyDict_Next(additional, &pos, &key, &val)) {
 189                         pfd[i].fd = PyObject_AsFileDescriptor(key);
 190                         pfd[i++].events = PyInt_AsLong(val);
 191                 }
 192         }
 193
 194         if (this == eApp)
 195                 Py_BEGIN_ALLOW_THREADS
 196                 ret = ::poll(pfd, fdcount, poll_timeout);
 197                 Py_END_ALLOW_THREADS
 198         else
 199                 ret = ::poll(pfd, fdcount, poll_timeout);
 200
 201                         /* ret > 0 means that there are some active poll entries. */
 202         if (ret > 0)
 203         {
 204                 int i=0;
 205                 return_reason = 0;
 206                 for (; i < nativecount; ++i)
 207                 {
 208                         if (pfd[i].revents)
 209                         {
 210                                 it = notifiers.find(pfd[i].fd);
 211                                 if (it != notifiers.end()
 212                                         && it->second->state == 1) // added and in poll
 213                                 {
 214                                         int req = it->second->getRequested();
 215                                         if (pfd[i].revents & req)
 216                                                 it->second->activate(pfd[i].revents & req);
 217                                         pfd[i].revents &= ~req;
 218                                 }
 219                                 if (pfd[i].revents & (POLLERR|POLLHUP|POLLNVAL))
 220                                         eDebug("poll: unhandled POLLERR/HUP/NVAL for fd %d(%d)", pfd[i].fd, pfd[i].revents);
 221                         }
 222                 }
 223                 for (; i < fdcount; ++i)
 224                 {
 225                         if (pfd[i].revents)
 226                         {
 227                                 if (!*res)
 228                                         *res = PyList_New(0);
 229                                 ePyObject it = PyTuple_New(2);
 230                                 PyTuple_SET_ITEM(it, 0, PyInt_FromLong(pfd[i].fd));
 231                                 PyTuple_SET_ITEM(it, 1, PyInt_FromLong(pfd[i].revents));
 232                                 PyList_Append(*res, it);
 233                                 Py_DECREF(it);
 234                         }
 235                 }
 236         }
 237         else if (ret < 0)
 238         {
 239                         /* when we got a signal, we get EINTR. */
 240                 if (errno != EINTR)
 241                         eDebug("poll made error (%m)");
 242                 else
 243                         return_reason = 2; /* don't assume the timeout has passed when we got a signal */
 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 // poll timeoutet
 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, ePyObject 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
 292                 if (app_quit_now)
 293                         return -1;
 294
 295                 int to = 0;
 296                 if (user_timeout)
 297                 {
 298                         timeval now, timeout;
 299                         gettimeofday(&now, 0);
 300                         if (user_timer<=now) // timeout
 301                                 return 0;
 302                         timeout = user_timer - now;
 303                         to = timeout.tv_sec * 1000 + timeout.tv_usec / 1000;
 304                 }
 305                 ret = processOneEvent(to, res, dict);
 306         } while ( !ret && !(res && *res) );
 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(ePyObject timeout, ePyObject dict)
 324 {
 325         PyObject *res=0;
 326
 327         if (app_quit_now)
 328                 Py_RETURN_NONE;
 329
 330         int user_timeout = (timeout == Py_None) ? 0 : PyInt_AsLong(timeout);
 331
 332         iterate(user_timeout, &res, dict);
 333         if (res)
 334                 return res;
 335
 336         return PyList_New(0); /* return empty list on timeout */
 337 }
 338
 339 void eMainloop::interruptPoll()
 340 {
 341         m_interrupt_requested = 1;
 342 }
 343
 344 void eMainloop::quit(int ret)
 345 {
 346         retval = ret;
 347         app_quit_now = true;
 348 }
 349
 350 void eMainloop::addTimeOffset(int offset)
 351 {
 352         for (ePtrList<eMainloop>::iterator it(eMainloop::existing_loops)
 353                 ;it != eMainloop::existing_loops.end(); ++it)
 354         {
 355                 singleLock s(it->recalcLock);
 356                 it->m_now_is_invalid = 1;
 357                 for (ePtrList<eTimer>::iterator tit = it->m_timer_list.begin(); tit != it->m_timer_list.end(); ++tit )
 358                         tit->addTimeOffset(offset);
 359         }
 360 }
 361
 362 eApplication* eApp = 0;