main.cc

   1 #include <stdlib.h>
   2
   3 #include "libthreads.h"
   4 #include "schedule.h"
   5 #include "common.h"
   6 #include "threads.h"
   7
   8 /* global "model" object */
   9 #include "model.h"
  10
  11 /*
  12  * Return 1 if found next thread, 0 otherwise
  13  */
  14 int num;
  15 int num1;
  16 int num2;
  17
  18 static int thread_system_next(void)
  19 {
  20         Thread *curr, *next;
  21
  22         curr = thread_current();
  23         if (curr) {
  24                 if (curr->get_state() == THREAD_READY) {
  25                         model->check_current_action();
  26                         model->scheduler->add_thread(curr);
  27                 } else if (curr->get_state() == THREAD_RUNNING)
  28                         /* Stopped while running; i.e., completed */
  29                         curr->complete();
  30                 else
  31                         ASSERT(false);
  32         }
  33         next = model->scheduler->next_thread();
  34         if (next)
  35                 next->set_state(THREAD_RUNNING);
  36         DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
  37         if (!next)
  38                 return 1;
  39         return Thread::swap(model->get_system_context(), next);
  40 }
  41
  42 static void thread_wait_finish(void)
  43 {
  44
  45         DBG();
  46
  47         while (!thread_system_next());
  48 }
  49
  50 /*
  51  * Main system function
  52  */
  53 int main()
  54 {
  55         thrd_t user_thread;
  56         ucontext_t main_context;
  57
  58         model = new ModelChecker();
  59
  60         if (getcontext(&main_context))
  61                 return 1;
  62
  63         model->set_system_context(&main_context);
  64
  65         do {
  66                 /* Start user program */
  67                 model->add_thread(new Thread(&user_thread, &user_main, NULL));
  68
  69                 /* Wait for all threads to complete */
  70                 thread_wait_finish();
  71         } while (model->next_execution());
  72
  73         delete model;
  74
  75         DEBUG("Exiting\n");
  76         return 0;
  77 }