kernel/fiasco/src/kern/timeslice_timeout.cpp

   1
   2 INTERFACE:
   3
   4 #include "timeout.h"
   5
   6 class Timeslice_timeout : public Timeout
   7 {
   8 };
   9
  10 IMPLEMENTATION:
  11
  12 #include <cassert>
  13 #include "globals.h"
  14 #include "sched_context.h"
  15 #include "std_macros.h"
  16
  17 /* Initialize global valiable timeslice_timeout */
  18 DEFINE_PER_CPU Per_cpu<Timeout *> timeslice_timeout;
  19 DEFINE_PER_CPU static Per_cpu<Timeslice_timeout> the_timeslice_timeout(true);
  20
  21 PUBLIC
  22 Timeslice_timeout::Timeslice_timeout(Cpu_number cpu)
  23 {
  24   timeslice_timeout.cpu(cpu) = this;
  25 }
  26
  27
  28 /**
  29  * Timeout expiration callback function
  30  * @return true to force a reschedule
  31  */
  32 PRIVATE
  33 bool
  34 Timeslice_timeout::expired()
  35 {
  36   Sched_context::Ready_queue &rq = Sched_context::rq.current();
  37   Sched_context *sched = rq.current_sched();
  38
  39   if (sched)
  40     {
  41 #if 0
  42       Context *owner = sched->owner();
  43
  44       // Ensure sched is owner's current timeslice
  45       assert (owner->sched() == sched);
  46 #endif
  47       sched->replenish();
  48       rq.requeue(sched);
  49       rq.invalidate_sched();
  50
  51 //      owner->switch_sched(sched);
  52     }
  53
  54   return true;                          // Force reschedule
  55 }