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// Copyright (C) 2013-2015 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#if !defined (COMMONAPI_INTERNAL_COMPILATION)
#error "Only <CommonAPI/CommonAPI.hpp> can be included directly, this file may disappear or change contents."
#endif
#ifndef COMMONAPI_DBUS_DBUSPROXYHELPER_HPP_
#define COMMONAPI_DBUS_DBUSPROXYHELPER_HPP_
#include <functional>
#include <future>
#include <memory>
#include <string>
#include <CommonAPI/DBus/DBusAddress.hpp>
#include <CommonAPI/DBus/DBusConfig.hpp>
#include <CommonAPI/DBus/DBusMessage.hpp>
#include <CommonAPI/DBus/DBusSerializableArguments.hpp>
#include <CommonAPI/DBus/DBusProxyAsyncCallbackHandler.hpp>
#include <CommonAPI/DBus/DBusProxyConnection.hpp>
namespace CommonAPI {
namespace DBus {
class DBusProxy;
template< class, class >
struct DBusProxyHelper;
#ifdef WIN32
// Visual Studio 2013 does not support 'magic statics' yet.
// Change back when switched to Visual Studio 2015 or higher.
static std::mutex callMethod_mutex_;
static std::mutex callMethodWithReply_mutex_;
static std::mutex callMethodAsync_mutex_;
#endif
template<
template<class ...> class In_, class... InArgs_,
template <class...> class Out_, class... OutArgs_>
struct DBusProxyHelper<In_<DBusInputStream, DBusOutputStream, InArgs_...>,
Out_<DBusInputStream, DBusOutputStream, OutArgs_...>> {
template <typename DBusProxy_ = DBusProxy>
static void callMethod(const DBusProxy_ &_proxy,
const std::string &_method,
const std::string &_signature,
const InArgs_&... _in,
CommonAPI::CallStatus &_status) {
#ifndef WIN32
static std::mutex callMethod_mutex_;
#endif
std::lock_guard<std::mutex> lock(callMethod_mutex_);
if (_proxy.isAvailable()) {
DBusMessage message = _proxy.createMethodCall(_method, _signature);
if (sizeof...(InArgs_) > 0) {
DBusOutputStream output(message);
if (!DBusSerializableArguments<InArgs_...>::serialize(output, _in...)) {
_status = CallStatus::OUT_OF_MEMORY;
return;
}
output.flush();
}
const bool isSent = _proxy.getDBusConnection()->sendDBusMessage(message);
_status = (isSent ? CallStatus::SUCCESS : CallStatus::OUT_OF_MEMORY);
} else {
_status = CallStatus::NOT_AVAILABLE;
}
}
template <typename DBusProxy_ = DBusProxy>
static void callMethodWithReply(
const DBusProxy_ &_proxy,
DBusMessage &_message,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
CommonAPI::CallStatus &_status,
OutArgs_&... _out) {
if (sizeof...(InArgs_) > 0) {
DBusOutputStream output(_message);
if (!DBusSerializableArguments<InArgs_...>::serialize(output, _in...)) {
_status = CallStatus::OUT_OF_MEMORY;
return;
}
output.flush();
}
DBusError error;
DBusMessage reply = _proxy.getDBusConnection()->sendDBusMessageWithReplyAndBlock(_message, error, _info);
if (error || !reply.isMethodReturnType()) {
_status = CallStatus::REMOTE_ERROR;
return;
}
if (sizeof...(OutArgs_) > 0) {
DBusInputStream input(reply);
if (!DBusSerializableArguments<OutArgs_...>::deserialize(input, _out...)) {
_status = CallStatus::REMOTE_ERROR;
return;
}
}
_status = CallStatus::SUCCESS;
}
template <typename DBusProxy_ = DBusProxy>
static void callMethodWithReply(
const DBusProxy_ &_proxy,
const DBusAddress &_address,
const char *_method,
const char *_signature,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
CommonAPI::CallStatus &_status,
OutArgs_&... _out) {
#ifndef WIN32
static std::mutex callMethodWithReply_mutex_;
#endif
std::lock_guard<std::mutex> lock(callMethodWithReply_mutex_);
if (_proxy.isAvailable()) {
DBusMessage message = DBusMessage::createMethodCall(_address, _method, _signature);
callMethodWithReply(_proxy, message, _info, _in..., _status, _out...);
} else {
_status = CallStatus::NOT_AVAILABLE;
}
}
template <typename DBusProxy_ = DBusProxy>
static void callMethodWithReply(
const DBusProxy_ &_proxy,
const std::string &_interface,
const std::string &_method,
const std::string &_signature,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
CommonAPI::CallStatus &_status,
OutArgs_&... _out) {
DBusAddress itsAddress(_proxy.getDBusAddress());
itsAddress.setInterface(_interface);
callMethodWithReply(
_proxy, itsAddress,
_method.c_str(), _signature.c_str(),
_info,
_in..., _status, _out...);
}
template <typename DBusProxy_ = DBusProxy>
static void callMethodWithReply(
const DBusProxy_ &_proxy,
const std::string &_method,
const std::string &_signature,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
CommonAPI::CallStatus &_status,
OutArgs_&... _out) {
#ifndef WIN32
static std::mutex callMethodWithReply_mutex_;
#endif
std::lock_guard<std::mutex> lock(callMethodWithReply_mutex_);
if (_proxy.isAvailable()) {
DBusMessage message = _proxy.createMethodCall(_method, _signature);
callMethodWithReply(_proxy, message, _info, _in..., _status, _out...);
} else {
_status = CallStatus::NOT_AVAILABLE;
}
}
template <typename DBusProxy_ = DBusProxy, typename AsyncCallback_>
static std::future<CallStatus> callMethodAsync(
const DBusProxy_ &_proxy,
DBusMessage &_message,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
AsyncCallback_ _callback,
std::tuple<OutArgs_...> _out) {
if (sizeof...(InArgs_) > 0) {
DBusOutputStream output(_message);
const bool success = DBusSerializableArguments<
InArgs_...
>::serialize(output, _in...);
if (!success) {
std::promise<CallStatus> promise;
promise.set_value(CallStatus::OUT_OF_MEMORY);
return promise.get_future();
}
output.flush();
}
return _proxy.getDBusConnection()->sendDBusMessageWithReplyAsync(
_message,
DBusProxyAsyncCallbackHandler<
OutArgs_...
>::create(std::move(_callback), _out),
_info);
}
template <typename DBusProxy_ = DBusProxy, typename AsyncCallback_>
static std::future<CallStatus> callMethodAsync(
const DBusProxy_ &_proxy,
const DBusAddress &_address,
const std::string &_method,
const std::string &_signature,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
AsyncCallback_ _callback,
std::tuple<OutArgs_...> _out) {
#ifndef WIN32
static std::mutex callMethodAsync_mutex_;
#endif
std::lock_guard<std::mutex> lock(callMethodAsync_mutex_);
if (_proxy.isAvailable()) {
DBusMessage message = DBusMessage::createMethodCall(_address, _method, _signature);
return callMethodAsync(_proxy, message, _info, _in..., _callback, _out);
} else {
CallStatus status = CallStatus::NOT_AVAILABLE;
callCallbackOnNotAvailable(_callback, typename make_sequence<sizeof...(OutArgs_)>::type(), _out);
std::promise<CallStatus> promise;
promise.set_value(status);
return promise.get_future();
}
}
template <typename DBusProxy_ = DBusProxy, typename AsyncCallback_>
static std::future<CallStatus> callMethodAsync(
const DBusProxy_ &_proxy,
const std::string &_interface,
const std::string &_method,
const std::string &_signature,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
AsyncCallback_ _callback,
std::tuple<OutArgs_...> _out) {
DBusAddress itsAddress(_proxy.getDBusAddress());
itsAddress.setInterface(_interface);
return callMethodAsync(
_proxy, itsAddress,
_method, _signature,
_info,
_in..., _callback, _out);
}
template <typename DBusProxy_ = DBusProxy, typename AsyncCallback_>
static std::future<CallStatus> callMethodAsync(
const DBusProxy_ &_proxy,
const std::string &_method,
const std::string &_signature,
const CommonAPI::CallInfo *_info,
const InArgs_&... _in,
AsyncCallback_ _callback,
std::tuple<OutArgs_...> _out) {
#ifndef WIN32
static std::mutex callMethodAsync_mutex_;
#endif
std::lock_guard<std::mutex> lock(callMethodAsync_mutex_);
if (_proxy.isAvailable()) {
DBusMessage message = _proxy.createMethodCall(_method, _signature);
return callMethodAsync(_proxy, message, _info, _in..., _callback, _out);
} else {
callCallbackOnNotAvailable(
_callback, typename make_sequence<sizeof...(OutArgs_)>::type(), _out);
CallStatus status = CallStatus::NOT_AVAILABLE;
std::promise<CallStatus> promise;
promise.set_value(status);
return promise.get_future();
}
}
template <int... ArgIndices_>
static void callCallbackOnNotAvailable(std::function<void(CallStatus, OutArgs_&...)> _callback,
index_sequence<ArgIndices_...>, std::tuple<OutArgs_...> _out) {
const CallStatus status(CallStatus::NOT_AVAILABLE);
_callback(status, std::get<ArgIndices_>(_out)...);
(void)_out;
}
};
} // namespace DBus
} // namespace CommonAPI
#endif // COMMONAPI_DBUS_DBUSPROXYHELPER_HPP_
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