code.vuplus.com Git - vuplus_dvbapp/blob - 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)
 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         int poll_timeout = -1; /* infinite in case of empty timer list */
 141
 142         if (m_timer_list)
 143         {
 144                 singleLock s(recalcLock);
 145                 poll_timeout = timeval_to_usec(m_timer_list.begin()->getNextActivation() - now);
 146                         /* if current timer already passed, don't delay infinite. */
 147                 if (poll_timeout < 0)
 148                         poll_timeout = 0;
 149
 150                         /* convert us to ms */
 151                 poll_timeout /= 1000;
 152         }
 153
 154         if ((user_timeout > 0) && (poll_timeout > user_timeout))
 155         {
 156                 poll_timeout = user_timeout;
 157                 return_reason = 1;
 158         }
 159
 160         int ret = 0;
 161
 162         if (poll_timeout)
 163         {
 164
 165                 std::multimap<int,eSocketNotifier*>::iterator it;
 166                 std::map<int,int> fd_merged;
 167                 std::map<int,int>::const_iterator fd_merged_it;
 168
 169                 for (it = notifiers.begin(); it != notifiers.end(); ++it)
 170                         fd_merged[it->first] |= it->second->getRequested();
 171
 172                 fd_merged_it = fd_merged.begin();
 173
 174                 int fdcount = fd_merged.size();
 175
 176                         // build the poll aray
 177                 pollfd* pfd = new pollfd[fdcount];  // make new pollfd array
 178
 179                 for (int i=0; i < fdcount; i++, fd_merged_it++)
 180                 {
 181                         pfd[i].fd = fd_merged_it->first;
 182                         pfd[i].events = fd_merged_it->second;
 183                 }
 184
 185                 ret = poll(pfd, fdcount, poll_timeout);
 186
 187                         /* ret > 0 means that there are some active poll entries. */
 188                 if (ret > 0)
 189                 {
 190                         return_reason = 0;
 191                         for (int i=0; i < fdcount ; i++)
 192                         {
 193                                 it = notifiers.begin();
 194
 195                                 int handled = 0;
 196
 197                                 std::multimap<int,eSocketNotifier*>::iterator
 198                                         l = notifiers.lower_bound(pfd[i].fd),
 199                                         u = notifiers.upper_bound(pfd[i].fd);
 200
 201                                 ePtrList<eSocketNotifier> n;
 202
 203                                 for (; l != u; ++l)
 204                                         n.push_back(l->second);
 205
 206                                 for (ePtrList<eSocketNotifier>::iterator li(n.begin()); li != n.end(); ++li)
 207                                 {
 208                                         int req = li->getRequested();
 209
 210                                         handled |= req;
 211
 212                                         if (pfd[i].revents & req)
 213                                                 (*li)->activate(pfd[i].revents);
 214                                 }
 215                                 if ((pfd[i].revents&~handled) & (POLLERR|POLLHUP|POLLNVAL))
 216                                                 eFatal("poll: unhandled POLLERR/HUP/NVAL for fd %d(%d)", pfd[i].fd, pfd[i].revents);
 217                         }
 218
 219                         ret = 1; /* poll did not timeout. */
 220                 } else if (ret < 0)
 221                 {
 222                                 /* when we got a signal, we get EINTR. */
 223                         if (errno != EINTR)
 224                                 eDebug("poll made error (%m)");
 225                         else
 226                         {
 227                                 return_reason = 2;
 228                                 ret = -1; /* don't assume the timeout has passed when we got a signal */
 229                         }
 230                 }
 231                 delete [] pfd;
 232         }
 233
 234                 /* when we not processed anything, check timers. */
 235         if (!ret)
 236         {
 237                         /* we know that this time has passed. */
 238                 now += poll_timeout;
 239
 240                 singleLock s(recalcLock);
 241
 242                         /* this will never change while we have the recalcLock */
 243                         /* we can savely return here, the timer will be re-checked soon. */
 244                 if (m_now_is_invalid)
 245                         return 0;
 246
 247                         /* process all timers which are ready. first remove them out of the list. */
 248                 while ((!m_timer_list.empty()) && (m_timer_list.begin()->getNextActivation() <= now))
 249                         m_timer_list.begin()->activate();
 250         }
 251
 252         return return_reason;
 253 }
 254
 255 void eMainloop::addTimer(eTimer* e)
 256 {
 257         m_timer_list.insert_in_order(e);
 258 }
 259
 260 void eMainloop::removeTimer(eTimer* e)
 261 {
 262         m_timer_list.remove(e);
 263 }
 264
 265 int eMainloop::iterate(unsigned int user_timeout)
 266 {
 267         int ret = 0;
 268
 269         do
 270         {
 271                 if (app_quit_now) break;
 272                 ret = processOneEvent(user_timeout);
 273         } while (ret == 0);
 274
 275         return ret;
 276 }
 277
 278 int eMainloop::runLoop()
 279 {
 280         while (!app_quit_now)
 281                 iterate();
 282         return retval;
 283 }
 284
 285 void eMainloop::quit(int ret)
 286 {
 287         retval = ret;
 288         app_quit_now = true;
 289 }
 290
 291 void eMainloop::addTimeOffset(int offset)
 292 {
 293         for (ePtrList<eMainloop>::iterator it(eMainloop::existing_loops)
 294                 ;it != eMainloop::existing_loops.end(); ++it)
 295         {
 296                 singleLock s(it->recalcLock);
 297                 it->m_now_is_invalid = 1;
 298                 for (ePtrList<eTimer>::iterator tit = it->m_timer_list.begin(); tit != it->m_timer_list.end(); ++tit )
 299                         tit->addTimeOffset(offset);
 300         }
 301 }
 302
 303 eApplication* eApp = 0;