C++ callable函数代码示例

static PyObject*
default_factory( Member* member, PyObject* owner )
{
    PyTuplePtr args( PyTuple_New( 0 ) );
    if( !args )
        return 0;
    PyObjectPtr callable( newref( member->default_context ) );
    return callable( args ).release();
}

static PyObject*
default_owner_method( Member* member, PyObject* owner )
{
    if( !PyString_Check( member->default_context ) )
        return py_type_fail( "default owner method name must be a string" );
    PyObjectPtr callable( PyObject_GetAttr( owner, member->default_context ) );
    if( !callable )
        return 0;
    PyTuplePtr args( PyTuple_New( 0 ) );
    if( !args )
        return 0;
    return callable( args ).release();
}

static PyObject*
post_validate_owner_method( Member* member, PyObject* owner, PyObject* oldvalue, PyObject* newvalue )
{
    if( !PyString_Check( member->post_validate_context ) )
        return py_type_fail( "post validate owner method name must be a string" );
    PyObjectPtr callable( PyObject_GetAttr( owner, member->post_validate_context ) );
    if( !callable )
        return 0;
    PyTuplePtr args( PyTuple_New( 2 ) );
    if( !args )
        return 0;
    args.set_item( 0, newref( oldvalue ) );
    args.set_item( 1, newref( newvalue ) );
    return callable( args ).release();
}

int get_code(unsigned* pycbuf, struct code_obj* pobj, int cur, int size)
{
    int func_idx = 0;
    int op_arg = 0;
    int num_obj = 1;
    int dealt = 0;
    int len = length(pycbuf, cur-5);
    int end = cur + len;
    while (cur < end-1 && !(cur >= size)) {
        if(!(callable(cur, pycbuf))) {
            field_add(&(pobj->code), pycbuf[cur]);
            if (have_arg(pycbuf[cur])) {
                op_arg = get_op_arg(pycbuf, cur);
                field_add(&(pobj->code), op_arg);
                cur += 3;
            } else {
                cur += 1; 
            }
        } else {
            //printf("****:dealing function\n");
            dealt = find_next_callable(pycbuf, cur, num_obj);
            struct code_obj* pnew_obj = malloc(sizeof(*pnew_obj));
            func_idx = get_fields(pycbuf, pnew_obj, dealt, size); /* get fields of the entire code object */
            objects[func_idx]->val.pobj =  pnew_obj;
            objects[func_idx]->type =  TYPE_CODE;
            num_obj++;
            cur += 9; 
        }
    }
    field_add(&(pobj->code), pycbuf[cur]);
    return cur+1; 
}

		void operator() (types... args)
		{
			for (auto& callable : this->callables)
			{
				callable(args...);
			}
		}

void every(const double delay, SharedPtr<Reactor> reactor,
        Callback<Error> &&callback, std::function<bool()> &&stop_predicate,
        Callback<> &&callable) {
    reactor->call_soon([
        =, callback = std::move(callback),
        stop_predicate = std::move(stop_predicate),
        callable = std::move(callable)
    ]() mutable {
        if (delay <= 0.0) {
            callback(ValueError());
            return;
        }
        if (stop_predicate()) {
            callback(NoError());
            return;
        }
        callable();
        reactor->call_later(delay, [
            =, callback = std::move(callback),
            stop_predicate = std::move(stop_predicate),
            callable = std::move(callable)
        ]() mutable {
            every(delay, reactor, std::move(callback),
                    std::move(stop_predicate), std::move(callable));
        });
    });
}

 static typename std::enable_if<!ndt::has_traits<KernelType>::value, callable>::type
 make(const ndt::type &tp, StaticDataType &&static_data)
 {
   return callable(tp, detail::get_targets<KernelType>(), detail::get_ir<KernelType>(),
                   std::forward<StaticDataType>(static_data), &KernelType::alloc, &KernelType::data_init,
                   &KernelType::resolve_dst_type, &KernelType::instantiate);
 }

 callable multidispatch(const ndt::type &self_tp,
                        const std::initializer_list<callable> &children,
                        const callable &default_child = callable())
 {
   return multidispatch<N>(self_tp, children.begin(), children.end(),
                           default_child);
 }

v8::Handle<v8::Value> Session::sendNativePdu(const v8::Arguments& args) {
    UNWRAP(Session, wrap, args.This());
    SwapScope scope(wrap, args);
    if(0 == wrap->session_) {
        return ThrowError("Session hasn't opened.");
    }

    if(2 != args.Length()) {
        return ThrowError("Must pass pdu and cb arguments to sendNativePdu.");
    }

    v8::Handle<v8::Object> cb = args[1]->ToObject();
    if (!cb->IsCallable()) {
        return ThrowError("Must pass pdu and cb arguments to sendNativePdu.");
    }

    UNWRAP(Pdu, pdu, args[0]->ToObject());

	std::auto_ptr<netsnmp_pdu> copy(pdu->is_owner()? pdu->release() : snmp_clone_pdu(pdu->native()));
    std::auto_ptr<Callable> callable(new Callable(cb, args[0], copy.get()));
    if(0 == snmp_sess_async_send(wrap->session_, copy.get(),
                                 Callable::OnEvent, callable.get())) {
        return ThrowError(snmp_api_errstring(wrap->arguments_.s_snmp_errno));
    }
    callable.release();
    copy.release();

    if(scope.hasException()) {
        return scope.getException();
    }
    return v8::Undefined();
}

 RT operator( )( )
 {
     PyGILState_STATE gstate = PyGILState_Ensure();
     RT result = boost::python::extract<RT>( callable( ) );
     PyGILState_Release( gstate );
     return result;
 }

 inline
 int
 main_with_catch(
   int argc,
   char const* argv[],
   void (*callable)(int argc, char const* argv[]))
 {
   user_plus_system_time();
   if (!check_fem_utils_int_types()) {
     return 255;
   }
   try {
     callable(argc, argv);
   }
   catch (fem::stop_info const& info) {
     std::fflush(stdout);
     std::fprintf(stderr, "%s\n", info.what());
     std::fflush(stderr);
   }
   catch (std::exception const& e) {
     std::fflush(stdout);
     char const* what = e.what();
     if (what == 0) what = "null";
     std::fprintf(stderr, "std::exception what(): %s\n", what);
     std::fflush(stderr);
     return 1;
   }
   catch (...) {
     std::fflush(stdout);
     std::fprintf(stderr, "Terminated by unknown C++ exception.\n");
     std::fflush(stderr);
     return 2;
   }
   return 0;
 }

void test_thread_callable_object_no_arguments()
{
    callable_no_args func;
    boost::thread callable(func);
    callable.join();
    BOOST_CHECK(callable_no_args::called);
}

void test_thread_callable_object_one_argument()
{
    callable_one_arg func;
    boost::thread callable(func,42);
    callable.join();
    BOOST_CHECK(callable_one_arg::called);
    BOOST_CHECK_EQUAL(callable_one_arg::called_arg,42);
}

variant candidate_action_with_filters::do_filtering(ai::formula_ai* ai, variant& input, game_logic::const_formula_ptr formula)
{
	game_logic::map_formula_callable callable(static_cast<const formula_callable*>(ai));
	callable.add("input", input);

	return formula::evaluate(formula, callable);

}

Thread::Thread(EventLoop& loop)
: _state(Thread::Ready)
, _detach(false)
, _impl(0)
{
    _impl = new ThreadImpl();
    _impl->init( callable(loop, &EventLoop::run) );
}