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