void looper::start()
{
std::chrono::time_point<std::chrono::steady_clock> tp = std::chrono::time_point<std::chrono::steady_clock>::max();
while (true)
{
mSem.downUntil(tp);
while (true)
{
mListLock.lock();
tp = calcNextTimeout();
if (tp != std::chrono::time_point<std::chrono::steady_clock>::min())
{
mListLock.unlock();
break;
}
msg m = mList.front();
if (m.target == nullptr)
{
mListLock.unlock();
mList.clear();
return;
}
mList.pop_front();
mListLock.unlock();
if (m.target->func)
m.target->func(m);
else
m.target->handleMessage(m);
}
}
}
void OSEventThread::Entry()
{
int n;
fd_set rfds;
struct timeval tv;
struct timeval * ptv = NULL;
ULONG lasttime = OS::GetTickCount();
ULONG currtime = lasttime;
init_wakeuper();
while (!IsStopRequested()) {
//10 check time rollback
lasttime = currtime;
currtime = OS::GetTickCount();
if(currtime < lasttime) {
rollback_timer(currtime);
firePending();
}
//20 calc timeout
if (-1 == calcNextTimeout(&tv,currtime)) {
// no pending timers; block indefinitely
TRACE("~~~~ no timers; blocking indefinitely ~~~~\n");
ptv = NULL;
} else {
TRACE("~~~~ blocking for %ds + %dus ~~~~\n", (int)tv.tv_sec, (int)tv.tv_usec);
ptv = &tv;
}
//30 make local copy of read fd_set
memcpy(&rfds, &mReadFds, sizeof(fd_set));
//40 select
n = select(mMaxfFd, &rfds, NULL, NULL, ptv);
TRACE("~~~~ %d events fired ~~~~\n", n);
if(n > 0){
//50 Check for read-ready
processReadReadies(&rfds, n);
}else if(n == 0){
//60 Check for timeouts
processTimeouts();
}else{
//70 check error
int err = OSThread::GetErrno();
switch(err)
{
case EINTR:
continue;
case EBADF:
WARN("event_req: EBADF\n");
continue;
case ENOTCONN:
ERR("event_req: ENOTCONN\n");
continue;
default:
ERR("event_req: select error (%d)\n", err);
ASSERT_C(0);
return;
}
}
//80 Fire away
firePending();
}
uninit_wakeuper();
TRACE("~~~~ Thread exit:%x ~~~~\n",(unsigned int)GetCurrentThreadID());
}
