Пример #1
0
  void Fiber::Info::mark(Object* obj, ObjectMark& mark) {
    auto_mark(obj, mark);

    Fiber* fib = (Fiber*)obj;
    if(CallFrame* cf = fib->call_frame()) {
      mark.gc->walk_call_frame(cf);
    }
  }
Пример #2
0
  Object* Fiber::resume(STATE, Arguments& args, CallFrame* calling_environment) {
#ifdef RBX_FIBER_ENABLED
    if(!data_) {
      data_ = state->vm()->new_fiber_data();
    }

    if(status_ == Fiber::eDead || data_->dead_p()) {
      Exception::fiber_error(state, "dead fiber called");
    }

    if(!prev_->nil_p()) {
      Exception::fiber_error(state, "double resume");
    }

    if(data_->thread() && data_->thread() != state->vm()) {
      Exception::fiber_error(state, "cross thread fiber resuming is illegal");
    }

    Array* val = args.as_array(state);
    value(state, val);

    Fiber* cur = Fiber::current(state);
    prev(state, cur);

    cur->sleep(calling_environment);

    run();
    state->vm()->set_current_fiber(this);

    data_->switch_to(state, cur->data_);

    // Back here when someone yields back to us!
    // Beware here, because the GC has probably run so GC pointers on the C++ stack
    // can't be accessed.

    cur = Fiber::current(state);
    state->set_call_frame(cur->call_frame());

    if(!cur->exception()->nil_p()) {
      state->raise_exception(cur->exception());
      cur->exception(state, nil<Exception>());
      return 0;
    }

    Array* ret = cur->value();

    if(ret->nil_p()) return cNil;

    switch(ret->size()) {
    case 0:  return cNil;
    case 1:  return ret->get(state, 0);
    default: return ret;
    }
#else
    return Primitives::failure();
#endif
  }
Пример #3
0
  Object* Fiber::s_yield(STATE, Arguments& args, CallFrame* calling_environment) {
#ifdef RBX_FIBER_ENABLED
    Fiber* cur = Fiber::current(state);
    Fiber* dest_fib = cur->prev();

    assert(cur != dest_fib);

    if(cur->root_) {
      Exception::fiber_error(state, "can't yield from root fiber");
    }

    cur->prev(state, nil<Fiber>());

    Array* val = args.as_array(state);
    dest_fib->value(state, val);

    cur->sleep(calling_environment);

    dest_fib->run();
    state->vm()->set_current_fiber(dest_fib);

    dest_fib->data_->switch_to(state, cur->data_);

    // Back here when someone yields back to us!
    // Beware here, because the GC has probably run so GC pointers on the C++ stack
    // can't be accessed.

    cur = Fiber::current(state);
    state->set_call_frame(cur->call_frame());

    Array* ret = cur->value();

    if(ret->nil_p()) return cNil;

    switch(ret->size()) {
    case 0:  return cNil;
    case 1:  return ret->get(state, 0);
    default: return ret;
    }
#else
    return Primitives::failure();
#endif
  }