main.cc

   1 #include "libthreads.h"
   2 #include "common.h"
   3 #include "threads.h"
   4
   5 /* global "model" object */
   6 #include "model.h"
   7 #include "snapshot-interface.h"
   8
   9 /*
  10  * Return 1 if found next thread, 0 otherwise
  11  */
  12 static int thread_system_next(void) {
  13         Thread *curr, *next;
  14
  15         curr = thread_current();
  16         if (curr) {
  17                 if (curr->get_state() == THREAD_READY) {
  18                         model->check_current_action();
  19                         model->scheduler->add_thread(curr);
  20                 } else if (curr->get_state() == THREAD_RUNNING)
  21                         /* Stopped while running; i.e., completed */
  22                         curr->complete();
  23                 else
  24                         ASSERT(false);
  25         }
  26         next = model->scheduler->next_thread();
  27         if (next)
  28                 next->set_state(THREAD_RUNNING);
  29         DEBUG("(%d, %d)\n", curr ? curr->get_id() : -1, next ? next->get_id() : -1);
  30         if (!next)
  31                 return 1;
  32         return Thread::swap(model->get_system_context(), next);
  33 }
  34
  35 static void thread_wait_finish(void) {
  36         DBG();
  37
  38         while (!thread_system_next());
  39 }
  40
  41 void real_main() {
  42         thrd_t user_thread;
  43         ucontext_t main_context;
  44
  45         //Create the singleton SnapshotStack object
  46         snapshotObject = new SnapshotStack();
  47
  48         model = new ModelChecker();
  49
  50         if (getcontext(&main_context))
  51                 return;
  52
  53         model->set_system_context(&main_context);
  54
  55         snapshotObject->snapshotStep(0);
  56
  57         do {
  58                 /* Start user program */
  59                 model->add_thread(new Thread(&user_thread, (void (*)(void *)) &user_main, NULL));
  60
  61                 /* Wait for all threads to complete */
  62                 thread_wait_finish();
  63         } while (model->next_execution());
  64
  65         delete model;
  66
  67         DEBUG("Exiting\n");
  68         finalize();
  69 }
  70
  71 int main_numargs;
  72 char ** main_args;
  73
  74 /*
  75  * Main system function
  76  */
  77 int main(int numargs, char ** args) {
  78         /* Stash this stuff in case someone wants it eventually */
  79         main_numargs=numargs;
  80         main_args=args;
  81
  82         /* Let's jump in quickly and start running stuff */
  83         initSnapShotLibrary(10000, 1024, 1024, 1000, &real_main);
  84 }