int
wxEpollDispatcher::DoPoll(epoll_event *events, int numEvents, int timeout) const
{
// the code below relies on TIMEOUT_INFINITE being -1 so that we can pass
// timeout value directly to epoll_wait() which interprets -1 as meaning to
// wait forever and would need to be changed if the value of
// TIMEOUT_INFINITE ever changes
wxCOMPILE_TIME_ASSERT( TIMEOUT_INFINITE == -1, UpdateThisCode );
wxMilliClock_t timeEnd;
if ( timeout > 0 )
timeEnd = wxGetLocalTimeMillis();
int rc;
for ( ;; )
{
rc = epoll_wait(m_epollDescriptor, events, numEvents, timeout);
if ( rc != -1 || errno != EINTR )
break;
// we got interrupted, update the timeout and restart
if ( timeout > 0 )
{
timeout = wxMilliClockToLong(timeEnd - wxGetLocalTimeMillis());
if ( timeout < 0 )
return 0;
}
}
return rc;
}
bool wxConsoleEventLoop::Pending() const
{
if ( m_dispatcher->HasPending() )
return true;
#if wxUSE_TIMER
wxUsecClock_t nextTimer;
if ( wxTimerScheduler::Get().GetNext(&nextTimer) &&
!wxMilliClockToLong(nextTimer) )
return true;
#endif // wxUSE_TIMER
return false;
}
int wxConsoleEventLoop::DispatchTimeout(unsigned long timeout)
{
#if wxUSE_TIMER
// check if we need to decrease the timeout to account for a timer
wxUsecClock_t nextTimer;
if ( wxTimerScheduler::Get().GetNext(&nextTimer) )
{
unsigned long timeUntilNextTimer = wxMilliClockToLong(nextTimer / 1000);
if ( timeUntilNextTimer < timeout )
timeout = timeUntilNextTimer;
}
#endif // wxUSE_TIMER
bool hadEvent = m_dispatcher->Dispatch(timeout) > 0;
#if wxUSE_TIMER
if ( wxTimerScheduler::Get().NotifyExpired() )
hadEvent = true;
#endif // wxUSE_TIMER
return hadEvent ? 1 : -1;
}
