///////////////////////////////cc.p////////////////////////////////////////
prefix_ senf::scheduler::detail::FIFORunner::FIFORunner()
- : tasks_ (), next_ (tasks_.end()), watchdogMs_ (1000), watchdogCount_(0), hangCount_ (0)
+ : tasks_ (), next_ (tasks_.end()), watchdogRunning_ (false), watchdogMs_ (1000),
+ watchdogCount_(0), hangCount_ (0)
{
struct sigevent ev;
::memset(&ev, 0, sizeof(ev));
sigaddset(&mask, SIGURG);
if (sigprocmask(SIG_UNBLOCK, &mask, 0) < 0)
SENF_THROW_SYSTEM_EXCEPTION("sigprocmask()");
+
+ tasks_.push_back(highPriorityEnd_);
+ tasks_.push_back(normalPriorityEnd_);
}
prefix_ senf::scheduler::detail::FIFORunner::~FIFORunner()
signal(SIGURG, SIG_DFL);
}
+prefix_ void senf::scheduler::detail::FIFORunner::startWatchdog()
+{
+ struct itimerspec timer;
+ ::memset(&timer, 0, sizeof(timer));
+
+ timer.it_interval.tv_sec = watchdogMs_ / 1000;
+ timer.it_interval.tv_nsec = (watchdogMs_ % 1000) * 1000000ul;
+ timer.it_value.tv_sec = timer.it_interval.tv_sec;
+ timer.it_value.tv_nsec = timer.it_interval.tv_nsec;
+
+ if (timer_settime(watchdogId_, 0, &timer, 0) < 0)
+ SENF_THROW_SYSTEM_EXCEPTION("timer_settime()");
+
+ watchdogRunning_ = true;
+}
+
+prefix_ void senf::scheduler::detail::FIFORunner::stopWatchdog()
+{
+ struct itimerspec timer;
+ ::memset(&timer, 0, sizeof(timer));
+
+ if (timer_settime(watchdogId_, 0, &timer, 0) < 0)
+ SENF_THROW_SYSTEM_EXCEPTION("timer_settime()");
+
+ watchdogRunning_ = false;
+}
+
// At the moment, the FIFORunner is not very efficient with many non-runnable tasks since the
// complete list of tasks is traversed on each run().
//
tasks_.erase(i);
}
-namespace {
- struct NullTask
- : public senf::scheduler::detail::FIFORunner::TaskInfo
- {
- NullTask() : senf::scheduler::detail::FIFORunner::TaskInfo ("<null>") {}
- virtual void v_run() {};
- virtual char const * v_type() const { return 0; }
- virtual std::string v_info() const { return ""; }
- };
+prefix_ void senf::scheduler::detail::FIFORunner::run()
+{
+ TaskList::iterator f (tasks_.begin());
+ TaskList::iterator l (TaskList::current(highPriorityEnd_));
+ run(f, l);
+
+ f = l; ++f;
+ l = TaskList::current(normalPriorityEnd_);
+ run(f, l);
+
+ f = l; ++f;
+ l = tasks_.end();
+ run(f, l);
}
-prefix_ void senf::scheduler::detail::FIFORunner::run()
+
+prefix_ void senf::scheduler::detail::FIFORunner::run(TaskList::iterator f, TaskList::iterator l)
{
+ if (f == l)
+ // We'll have problems inserting NullTask between f and l below, so just explicitly bail out
+ return;
+
// This algorithm is carefully adjusted to make it work even when arbitrary tasks are removed
// from the queue
// - Before we begin, we add a NullTask to the queue. The only purpose of this node is, to mark
// the current end of the queue. The iterator to this node becomes the end iterator of the
// range to process
- // - We update the TaskInfo and move it to the end of the queue before calling the callback so
+ // - We update the TaskInfo and move it to the next queue Element before calling the callback so
// we don't access the TaskInfo if it is removed while the callback is running
// - We keep the next to-be-processed node in a class variable which is checked and updated
// whenever a node is removed.
+
NullTask null;
- struct itimerspec timer;
- timer.it_interval.tv_sec = watchdogMs_ / 1000;
- timer.it_interval.tv_nsec = (watchdogMs_ % 1000) * 1000000ul;
- timer.it_value.tv_sec = timer.it_interval.tv_sec;
- timer.it_value.tv_nsec = timer.it_interval.tv_nsec;
- tasks_.push_back(null);
+ tasks_.insert(l, null);
TaskList::iterator end (TaskList::current(null));
- next_ = tasks_.begin();
+ next_ = f;
try {
- if (timer_settime(watchdogId_, 0, &timer, 0) < 0)
- SENF_THROW_SYSTEM_EXCEPTION("timer_settime()");
while (next_ != end) {
TaskInfo & task (*next_);
if (task.runnable_) {
# endif
TaskList::iterator i (next_);
++ next_;
- tasks_.splice(tasks_.end(), tasks_, i);
+ tasks_.splice(l, tasks_, i);
watchdogCount_ = 1;
task.run();
}
}
catch (...) {
watchdogCount_ = 0;
- timer.it_interval.tv_sec = 0;
- timer.it_interval.tv_nsec = 0;
- timer.it_value.tv_sec = 0;
- timer.it_value.tv_nsec = 0;
- timer_settime(watchdogId_, 0, &timer, 0);
- tasks_.erase(end);
- next_ = tasks_.end();
+ next_ = l;
throw;
}
watchdogCount_ = 0;
- timer.it_interval.tv_sec = 0;
- timer.it_interval.tv_nsec = 0;
- timer.it_value.tv_sec = 0;
- timer.it_value.tv_nsec = 0;
- if (timer_settime(watchdogId_, 0, &timer, 0) < 0)
- SENF_THROW_SYSTEM_EXCEPTION("timer_settime()");
- tasks_.erase(end);
- next_ = tasks_.end();
+ next_ = l;
+}
+
+prefix_ senf::scheduler::detail::FIFORunner::TaskList::iterator
+senf::scheduler::detail::FIFORunner::priorityEnd(TaskInfo::Priority p)
+{
+ switch (p) {
+ case senf::scheduler::detail::FIFORunner::TaskInfo::PRIORITY_LOW :
+ return tasks_.end();
+ case senf::scheduler::detail::FIFORunner::TaskInfo::PRIORITY_NORMAL :
+ return TaskList::current(normalPriorityEnd_);
+ case senf::scheduler::detail::FIFORunner::TaskInfo::PRIORITY_HIGH :
+ return TaskList::current(highPriorityEnd_);
+ }
+ return tasks_.begin();
}
prefix_ void senf::scheduler::detail::FIFORunner::watchdog(int, siginfo_t * si, void *)
projects / senf.git / blobdiff