#include "common.h"
#include "model.h"
+Scheduler::Scheduler() :
+ current(NULL)
+{
+}
+
void Scheduler::add_thread(Thread *t)
{
DEBUG("thread %d\n", t->get_id());
readyList.push_back(t);
}
-Thread *Scheduler::next_thread(void)
+void Scheduler::remove_thread(Thread *t)
{
- if (readyList.empty())
- return NULL;
+ if (current == t)
+ current = NULL;
+ else
+ readyList.remove(t);
+}
- current = readyList.front();
- readyList.pop_front();
+Thread * Scheduler::next_thread(void)
+{
+ Thread *t = model->schedule_next_thread();
- return current;
+ if (t != NULL) {
+ current = t;
+ readyList.remove(t);
+ } else if (readyList.empty()) {
+ t = NULL;
+ } else {
+ t = readyList.front();
+ current = t;
+ readyList.pop_front();
+ }
+
+ print();
+
+ return t;
}
-Thread *Scheduler::get_current_thread(void)
+Thread * Scheduler::get_current_thread(void)
{
return current;
}
+
+void Scheduler::print()
+{
+ if (current)
+ DEBUG("Current thread: %d\n", current->get_id());
+ else
+ DEBUG("No current thread\n");
+ DEBUG("Num. threads in ready list: %zu\n", readyList.size());
+
+ std::list<Thread *, MyAlloc< Thread * > >::iterator it;
+ for (it = readyList.begin(); it != readyList.end(); it++)
+ DEBUG("In ready list: thread %d\n", (*it)->get_id());
+}