lunaix-os/kernel/process/switch.c

   1 #include <lunaix/switch.h>
   2 #include <lunaix/signal.h>
   3 #include <lunaix/sched.h>
   4 #include <lunaix/process.h>
   5
   6 extern void
   7 signal_dispatch(struct signpost_result* result);
   8
   9 extern void
  10 preempt_handle_stalled(struct signpost_result* result);
  11
  12 #define do_signpost(fn, result)                         \
  13     do {                                                \
  14         fn((result));                                   \
  15         if ((result)->mode == SWITCH_MODE_FAST) {       \
  16             thread_stats_update_leaving();              \
  17             return (result)->stack;                     \
  18         }                                               \
  19         if ((result)->mode == SWITCH_MODE_GIVEUP) {     \
  20             schedule();                                 \
  21             fail("unexpected return");                  \
  22         }                                               \
  23     } while (0)
  24
  25 ptr_t
  26 switch_signposting()
  27 {
  28     struct signpost_result result;
  29
  30     do_signpost(preempt_handle_stalled, &result);
  31
  32     do_signpost(signal_dispatch, &result);
  33
  34     thread_stats_update_leaving();
  35
  36     return 0;
  37 }