Beispiel #1
0
  Object* Fiber::resume(STATE, Arguments& args) {
#ifdef RBX_FIBER_ENABLED
    if(!data()) {
      data(state->vm()->new_fiber_data(stack_size()->to_native()));
    }

    if(status() == Fiber::eDead || data()->dead_p()) {
      Exception::raise_fiber_error(state, "dead fiber called");
    }

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

    if(data()->thread() && data()->thread() != state->vm()) {
      Exception::raise_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(state);

    run(state);

    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);

    // TODO: clean up this and the following conditional.
    if(state->vm()->thread_interrupted_p(state)) {
      return NULL;
    }

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

    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
    Exception::raise_not_implemented_error(state, "Fibers not supported on this platform");
#endif
  }
Beispiel #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
  }
Beispiel #3
0
  Object* Fiber::resume(STATE, Arguments& args, CallFrame* calling_environment) {
#ifdef FIBER_ENABLED
    if(status_ == Fiber::eDead) {
      Exception::fiber_error(state, "dead fiber called");
    }

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

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

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

    cur->sleep(calling_environment);

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

    if(swapcontext(cur->ucontext(), context_) != 0)
      assert(0 && "fatal swapcontext() error");

    // 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);

    if(!cur->exception()->nil_p()) {
      state->thread_state()->raise_exception(cur->exception());
      cur->exception(state, (Exception*)Qnil);
      return 0;
    }

    Array* ret = cur->value();

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

    switch(ret->size()) {
    case 0:  return Qnil;
    case 1:  return ret->get(state, 0);
    default: return ret;
    }
#else
    return Primitives::failure();
#endif
  }
Beispiel #4
0
  void Fiber::start_on_stack() {
#ifdef RBX_FIBER_ENABLED
    VM* vm = VM::current();
    State state_obj(vm), *state = &state_obj;

    Fiber* fib = Fiber::current(state);

    // Reset the current fiber again to reset the stack limits so
    // we can properly detect stack overflows
    vm->set_current_fiber(fib);

    Array* result = nil<Array>();
    Object* obj = fib->starter()->send(state, G(sym_call), fib->value(), cNil, false);

    // GC has run! Don't use stack vars!

    fib = Fiber::current(state);
    fib->status(Fiber::eDead);
    fib->dead(cTrue);
    fib->set_call_frame(state, 0);

    Fiber* dest = fib->prev();

    // If this fiber has already been cleaned up, just ignore this
    if(!dest->data()) return;

    assert(!dest->nil_p());

    // Box this up so it's in a standard format at the point
    // of returning, so we can deal with it in the same way
    // as *args from #yield, #resume, and #transfer
    if(obj) {
      result = Array::create(state, 1);
      result->set(state, 0, obj);
    } else {
      if(state->vm()->thread_state()->raise_reason() == cException) {
        dest->exception(state, state->vm()->thread_state()->current_exception());
      }
    }

    vm->metrics().system.fibers_destroyed++;

    dest->run(state);
    dest->value(state, result);

    dest->data()->switch_and_orphan(state, fib->data());

    // TODO: CallFrame: return from this function

    rubinius::bug("returning from Fiber::start_on_stack");
#else
    rubinius::bug("Fibers not supported on this platform");
#endif
  }
Beispiel #5
0
  void Fiber::start_on_stack() {
#ifdef RBX_FIBER_ENABLED
    VM* vm = VM::current();
    State state(vm);

    Fiber* fib = Fiber::current(&state);

    // Reset the current fiber again to reset the stack limits so
    // we can properly detect stack overflows
    vm->set_current_fiber(fib);

    Array* result = nil<Array>();
    Object* obj = fib->starter()->send(&state, NULL, state.globals().sym_call.get(), fib->value(), cNil, false);
    // GC has run! Don't use stack vars!

    fib = Fiber::current(&state);
    fib->status_ = Fiber::eDead;
    fib->dead_ = cTrue;

    Fiber* dest = fib->prev();

    // If this fiber has already been cleaned up, just ignore this
    if(!dest->data()) return;

    assert(!dest->nil_p());

    // Box this up so it's in a standard format at the point
    // of returning, so we can deal with it in the same way
    // as *args from #yield, #resume, and #transfer
    if(obj) {
      result = Array::create(&state, 1);
      result->set(&state, 0, obj);
    } else {
      if(state.vm()->thread_state()->raise_reason() == cException) {
        dest->exception(&state, state.vm()->thread_state()->current_exception());
      }
    }

    dest->run();
    dest->value(&state, result);
    state.vm()->set_current_fiber(dest);

    dest->data_->switch_and_orphan(&state, fib->data_);

    assert(0 && "fatal start_on_stack error");
#else
    rubinius::bug("Fibers not supported on this platform");
#endif
  }
Beispiel #6
0
  void Fiber::start_on_stack() {
#ifdef FIBER_ENABLED
    VM* state = VM::current();

    Fiber* fib = Fiber::current(state);

    // Affix this fiber to this thread now.
    fib->state_ = state;

    Array* result = (Array*)Qnil;
    Object* obj = fib->starter()->send(state, NULL, G(sym_call), fib->value(), Qnil, false);
    // GC has run! Don't use stack vars!

    fib = Fiber::current(state);
    fib->status_ = Fiber::eDead;
    fib->set_ivar(state, state->symbol("@dead"), Qtrue);

    Fiber* dest = fib->prev();
    assert(!dest->nil_p());

    // Box this up so it's in a standard format at the point
    // of returning, so we can deal with it in the same way
    // as *args from #yield, #resume, and #transfer
    if(obj) {
      result = Array::create(state, 1);
      result->set(state, 0, obj);
    } else {
      if(state->thread_state()->raise_reason() == cException) {
        dest->exception(state, state->thread_state()->current_exception());
      }
    }

    dest->run();
    dest->value(state, result);
    state->set_current_fiber(dest);

    if(setcontext(dest->ucontext()) != 0)
      assert(0 && "fatal swapcontext() error");

    assert(0 && "fatal start_on_stack error");
#else
    abort();
#endif
  }