main.cc

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