// Custom includes
#include <errno.h>
#include <sys/epoll.h>
-#include "Utils/Exception.hh"
-#include "Utils/MicroTime.hh"
+#include "../Utils/Exception.hh"
static const int EPollInitialSize = 16;
#define prefix_
///////////////////////////////cc.p////////////////////////////////////////
-prefix_ senf::Scheduler::Scheduler & senf::Scheduler::instance()
-{
- static Scheduler instance;
- return instance;
-}
-
-prefix_ void senf::Scheduler::timeout(unsigned long timeout, TimerCallback const & cb)
-{
- timerQueue_.push(TimerSpec(now()+1000*timeout,cb));
-}
-
prefix_ senf::Scheduler::Scheduler()
- : epollFd_(epoll_create(EPollInitialSize))
+ : timerIdCounter_(0), epollFd_ (epoll_create(EPollInitialSize)), terminate_(false),
+ eventTime_(0)
{
if (epollFd_<0)
throw SystemException(errno);
prefix_ void senf::Scheduler::process()
{
terminate_ = false;
+ eventTime_ = ClockService::now();
while (! terminate_) {
- MicroTime timeNow = now();
- while ( ! timerQueue_.empty() && timerQueue_.top().timeout <= timeNow ) {
- timerQueue_.top().cb();
+ // Since a callback may have disabled further timers, we need to check for canceled timeouts
+ // again.
+
+ while (! timerQueue_.empty()) {
+ TimerMap::iterator i (timerQueue_.top());
+ if (! i->second.canceled)
+ break;
+ timerMap_.erase(i);
timerQueue_.pop();
}
- if (terminate_)
- return;
- int timeout = timerQueue_.empty() ? -1 : int((timerQueue_.top().timeout - timeNow)/1000);
+ int timeout (-1);
+ if (timerQueue_.empty()) {
+ if (fdTable_.empty())
+ break;
+ }
+ else {
+ ClockService::clock_type delta (
+ (timerQueue_.top()->second.timeout - eventTime_)/1000000UL);
+ timeout = delta < 0 ? 0 : delta;
+ }
+
+ ///\todo Handle more than one epoll_event per call
struct epoll_event ev;
int events = epoll_wait(epollFd_, &ev, 1, timeout);
if (events<0)
- // Hmm ... man epoll says, it will NOT return with EINTR. I hope, this is true :-)
- throw SystemException(errno);
- if (events==0)
- // Timeout .. the handler will be run when going back to the loop top
+ if (errno != EINTR)
+ throw SystemException(errno);
+
+ eventTime_ = ClockService::now();
+
+ // We always run event handlers. This is important, even if a file-descriptor is signaled
+ // since some descriptors (e.g. real files) will *always* be ready and we still may want to
+ // handle timers.
+ // Time handlers are run before file events to not delay them unnecessarily.
+
+ while (! timerQueue_.empty()) {
+ TimerMap::iterator i (timerQueue_.top());
+ if (i->second.canceled)
+ ;
+ else if (i->second.timeout <= eventTime_)
+ i->second.cb();
+ else
+ break;
+ timerQueue_.pop();
+ timerMap_.erase(i);
+ }
+
+ if (events <= 0)
continue;
FdTable::iterator i = fdTable_.find(ev.data.fd);
BOOST_ASSERT (i != fdTable_.end() );
- // \todo Make this more efficient. Instead of copying the event-spec it should be
- // revalidated by monitoring add/remove calls
EventSpec spec (i->second);
unsigned extraFlags (0);
// c-file-style: "senf"
// indent-tabs-mode: nil
// ispell-local-dictionary: "american"
+// compile-command: "scons -u test"
+// comment-column: 40
// End: