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/**
* Copyright (C) 2021-2024 Saturneric <[email protected]>
*
* This file is part of GpgFrontend.
*
* GpgFrontend is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GpgFrontend is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <[email protected]> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#pragma once
#include <mutex>
#include "core/GpgFrontendCoreExport.h"
#include "core/function/basic/ChannelObject.h"
#include "core/function/basic/SingletonStorage.h"
#include "core/function/basic/SingletonStorageCollection.h"
#include "core/typedef/CoreTypedef.h"
#include "core/utils/MemoryUtils.h"
namespace GpgFrontend {
auto GPGFRONTEND_CORE_EXPORT GetChannelObjectInstance(
const std::type_info& type, int channel) -> ChannelObject*;
auto GPGFRONTEND_CORE_EXPORT CreateChannelObjectInstance(
const std::type_info& type, int channel,
SecureUniquePtr<ChannelObject> channel_object) -> ChannelObject*;
auto GPGFRONTEND_CORE_EXPORT
GetGlobalFunctionObjectTypeLock(const std::type_info& type) -> std::mutex&;
/**
* @brief
*
* @tparam T
*/
template <typename T>
class SingletonFunctionObject : public ChannelObject {
public:
/**
* @brief prohibit copy
*
*/
SingletonFunctionObject(const SingletonFunctionObject<T>&) = delete;
/**
* @brief prohibit copy
*
* @return SingletonFunctionObject&
*/
auto operator=(const SingletonFunctionObject<T>&)
-> SingletonFunctionObject& = delete;
/**
* @brief Get the Instance object
*
* @param channel
* @return T&
*/
static auto GetInstance(int channel = GpgFrontend::kGpgFrontendDefaultChannel)
-> T& {
static_assert(std::is_base_of_v<SingletonFunctionObject<T>, T>,
"T not derived from SingletonFunctionObject<T>");
const auto& type = typeid(T);
std::lock_guard<std::mutex> guard(GetGlobalFunctionObjectTypeLock(type));
auto* channel_object = GetChannelObjectInstance(type, channel);
if (channel_object == nullptr) {
channel_object = CreateChannelObjectInstance(
type, channel,
ConvertToChannelObjectPtr(SecureCreateUniqueObject<T>(channel)));
}
return *static_cast<T*>(channel_object);
}
/**
* @brief Create a Instance object
*
* @param channel
* @param factory
* @return T&
*/
static auto CreateInstance(
int channel, const std::function<ChannelObjectPtr(void)>& factory) -> T& {
static_assert(std::is_base_of_v<SingletonFunctionObject<T>, T>,
"T not derived from SingletonFunctionObject<T>");
const auto& type = typeid(T);
std::lock_guard<std::mutex> guard(GetGlobalFunctionObjectTypeLock(type));
return *static_cast<T*>(
CreateChannelObjectInstance(type, channel, factory()));
}
/**
* @brief
*
* @param channel
* @return T&
*/
static void ReleaseChannel(int channel) {
SingletonStorageCollection::GetInstance(false)
->GetSingletonStorage(typeid(T))
->ReleaseChannel(channel);
}
/**
* @brief Get the Default Channel object
*
* @return int
*/
static auto GetDefaultChannel() -> int {
return ChannelObject::GetDefaultChannel();
}
/**
* @brief Get the Channel object
*
* @return int
*/
[[nodiscard]] auto GetChannel() const -> int {
return ChannelObject::GetChannel();
}
/**
* @brief Get the All Channel Id object
*
* @return QContainer<int>
*/
static auto GetAllChannelId() -> QContainer<int> {
return SingletonStorageCollection::GetInstance(false)
->GetSingletonStorage(typeid(T))
->GetAllChannelId();
}
/**
* @brief Construct a new Singleton Function Object object
*
*/
SingletonFunctionObject(T&&) = delete;
/**
* @brief Construct a new Singleton Function Object object
*
*/
SingletonFunctionObject(const T&) = delete;
/**
* @brief
*
*/
void operator=(const T&) = delete;
protected:
/**
* @brief Construct a new Singleton Function Object object
*
*/
SingletonFunctionObject() = default;
/**
* @brief Construct a new Singleton Function Object object
*
* @param channel
*/
explicit SingletonFunctionObject(int channel)
: ChannelObject(channel, typeid(T).name()) {}
/**
* @brief Destroy the Singleton Function Object object
*
*/
virtual ~SingletonFunctionObject() = default;
};
} // namespace GpgFrontend
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