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-rw-r--r--src/core/function/basic/ChannelObject.cpp45
-rw-r--r--src/core/function/basic/ChannelObject.h80
-rw-r--r--src/core/function/basic/GpgFunctionObject.cpp29
-rw-r--r--src/core/function/basic/GpgFunctionObject.h209
-rw-r--r--src/core/function/basic/SingletonStorage.cpp118
-rw-r--r--src/core/function/basic/SingletonStorage.h86
-rw-r--r--src/core/function/basic/SingletonStorageCollection.cpp104
-rw-r--r--src/core/function/basic/SingletonStorageCollection.h69
8 files changed, 740 insertions, 0 deletions
diff --git a/src/core/function/basic/ChannelObject.cpp b/src/core/function/basic/ChannelObject.cpp
new file mode 100644
index 00000000..9485a278
--- /dev/null
+++ b/src/core/function/basic/ChannelObject.cpp
@@ -0,0 +1,45 @@
+/**
+ * Copyright (C) 2021 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
+ *
+ */
+
+#include "ChannelObject.h"
+
+namespace GpgFrontend {
+
+ChannelObject::ChannelObject() noexcept = default;
+
+ChannelObject::ChannelObject(int channel) : channel_(channel) {}
+
+void ChannelObject::SetChannel(int channel) { this->channel_ = channel; }
+
+auto ChannelObject::GetChannel() const -> int { return channel_; }
+
+auto ChannelObject::GetDefaultChannel() -> int {
+ return kGpgFrontendDefaultChannel;
+}
+
+} // namespace GpgFrontend \ No newline at end of file
diff --git a/src/core/function/basic/ChannelObject.h b/src/core/function/basic/ChannelObject.h
new file mode 100644
index 00000000..9d247e6a
--- /dev/null
+++ b/src/core/function/basic/ChannelObject.h
@@ -0,0 +1,80 @@
+/**
+ * Copyright (C) 2021 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
+
+namespace GpgFrontend {
+
+static constexpr int kGpgFrontendDefaultChannel =
+ 0; ///< the default channel id
+
+/**
+ * @brief object which in channel system is called "channel"
+ *
+ */
+class GPGFRONTEND_CORE_EXPORT ChannelObject {
+ public:
+ /**
+ * @brief Construct a new Default Channel Object object
+ *
+ */
+ ChannelObject() noexcept;
+
+ /**
+ * @brief Construct a new Channel Object object
+ *
+ * @param channel
+ */
+ explicit ChannelObject(int channel);
+
+ /**
+ * @brief Get the Default Channel object
+ *
+ * @return int
+ */
+ static auto GetDefaultChannel() -> int;
+
+ /**
+ * @brief Get the Channel object
+ *
+ * @return int
+ */
+ [[nodiscard]] auto GetChannel() const -> int;
+
+ /**
+ * @brief Set the Channel object
+ *
+ * @param channel
+ */
+ void SetChannel(int channel);
+
+ private:
+ int channel_ = kGpgFrontendDefaultChannel; ///< The channel id
+};
+
+} // namespace GpgFrontend \ No newline at end of file
diff --git a/src/core/function/basic/GpgFunctionObject.cpp b/src/core/function/basic/GpgFunctionObject.cpp
new file mode 100644
index 00000000..242621d2
--- /dev/null
+++ b/src/core/function/basic/GpgFunctionObject.cpp
@@ -0,0 +1,29 @@
+/**
+ * Copyright (C) 2021 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
+ *
+ */
+
+#include "GpgFunctionObject.h" \ No newline at end of file
diff --git a/src/core/function/basic/GpgFunctionObject.h b/src/core/function/basic/GpgFunctionObject.h
new file mode 100644
index 00000000..59bc5715
--- /dev/null
+++ b/src/core/function/basic/GpgFunctionObject.h
@@ -0,0 +1,209 @@
+/**
+ * Copyright (C) 2021 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 "core/function/basic/ChannelObject.h"
+#include "core/function/basic/SingletonStorage.h"
+#include "core/function/basic/SingletonStorageCollection.h"
+
+namespace GpgFrontend {
+
+/**
+ * @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 std::mutex g_channel_mutex_map_lock;
+ static std::map<int, std::mutex> g_channel_mutex_map;
+
+ {
+ std::lock_guard<std::mutex> guard(g_channel_mutex_map_lock);
+ if (g_channel_mutex_map.find(channel) == g_channel_mutex_map.end()) {
+ g_channel_mutex_map[channel];
+ }
+ }
+
+ static_assert(std::is_base_of<SingletonFunctionObject<T>, T>::value,
+ "T not derived from SingletonFunctionObject<T>");
+
+ auto* p_storage =
+ SingletonStorageCollection::GetInstance(false)->GetSingletonStorage(
+ typeid(T));
+ auto* p_pbj = static_cast<T*>(p_storage->FindObjectInChannel(channel));
+
+ if (p_pbj == nullptr) {
+ // lock this channel
+ std::lock_guard<std::mutex> guard(g_channel_mutex_map[channel]);
+
+ // double check
+ if (p_pbj = static_cast<T*>(p_storage->FindObjectInChannel(channel));
+ p_pbj != nullptr) {
+ return *p_pbj;
+ }
+
+ // do create object of this channel
+ auto new_obj = std::unique_ptr<ChannelObject>(new T(channel));
+ return *static_cast<T*>(
+ p_storage->SetObjectInChannel(channel, std::move(new_obj)));
+ }
+ return *p_pbj;
+ }
+
+ /**
+ * @brief Create a Instance object
+ *
+ * @param channel
+ * @param factory
+ * @return T&
+ */
+ static auto CreateInstance(
+ int channel,
+ const std::function<std::unique_ptr<ChannelObject>(void)>& factory)
+ -> T& {
+ static_assert(std::is_base_of<SingletonFunctionObject<T>, T>::value,
+ "T not derived from SingletonFunctionObject<T>");
+
+ auto* p_storage =
+ SingletonStorageCollection::GetInstance(false)->GetSingletonStorage(
+ typeid(T));
+
+ auto p_pbj = static_cast<T*>(p_storage->FindObjectInChannel(channel));
+
+ if (p_pbj == nullptr) {
+ return *static_cast<T*>(
+ p_storage->SetObjectInChannel(channel, factory()));
+ }
+ return *p_pbj;
+ }
+
+ /**
+ * @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 all the channel ids
+ *
+ * @return std::vector<int>
+ */
+ static auto GetAllChannelId() -> std::vector<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) {}
+
+ /**
+ * @brief Destroy the Singleton Function Object object
+ *
+ */
+ virtual ~SingletonFunctionObject() = default;
+};
+} // namespace GpgFrontend
diff --git a/src/core/function/basic/SingletonStorage.cpp b/src/core/function/basic/SingletonStorage.cpp
new file mode 100644
index 00000000..567d3572
--- /dev/null
+++ b/src/core/function/basic/SingletonStorage.cpp
@@ -0,0 +1,118 @@
+/**
+ * Copyright (C) 2021 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
+ *
+ */
+
+#include "SingletonStorage.h"
+
+#include <shared_mutex>
+
+#include "core/function/basic/ChannelObject.h"
+
+namespace GpgFrontend {
+
+class SingletonStorage::Impl {
+ public:
+ void ReleaseChannel(int channel) {
+ decltype(instances_map_.end()) ins_it;
+ {
+ std::shared_lock<std::shared_mutex> lock(instances_mutex_);
+ ins_it = instances_map_.find(channel);
+ }
+ if (ins_it != instances_map_.end()) instances_map_.erase(ins_it);
+ }
+
+ auto FindObjectInChannel(int channel) -> GpgFrontend::ChannelObject* {
+ // read instances_map_
+ decltype(instances_map_.end()) ins_it;
+ {
+ std::shared_lock<std::shared_mutex> lock(instances_mutex_);
+ ins_it = instances_map_.find(channel);
+ if (ins_it == instances_map_.end()) {
+ return nullptr;
+ }
+ return ins_it->second.get();
+ }
+ }
+
+ auto GetAllChannelId() -> std::vector<int> {
+ std::vector<int> channels;
+ channels.reserve(instances_map_.size());
+ for (const auto& [key, value] : instances_map_) {
+ channels.push_back(key);
+ }
+ return channels;
+ }
+
+ auto SetObjectInChannel(int channel, std::unique_ptr<ChannelObject> p_obj)
+ -> GpgFrontend::ChannelObject* {
+ {
+ SPDLOG_TRACE("set channel: {} instance address: {}", channel,
+ static_cast<void*>(&instances_map_));
+
+ assert(p_obj != nullptr);
+ if (p_obj == nullptr) return nullptr;
+
+ auto* raw_obj = p_obj.get();
+ p_obj->SetChannel(channel);
+ {
+ std::unique_lock<std::shared_mutex> lock(instances_mutex_);
+ instances_map_.insert({channel, std::move(p_obj)});
+ }
+ return raw_obj;
+ }
+ }
+
+ private:
+ std::shared_mutex instances_mutex_; ///< mutex for _instances_map
+ std::map<int, std::unique_ptr<ChannelObject>>
+ instances_map_; ///< map of singleton instances
+};
+
+SingletonStorage::SingletonStorage() noexcept : p_(std::make_unique<Impl>()) {}
+
+SingletonStorage::~SingletonStorage() = default;
+
+void SingletonStorage::ReleaseChannel(int channel) {
+ p_->ReleaseChannel(channel);
+}
+
+auto SingletonStorage::FindObjectInChannel(int channel)
+ -> GpgFrontend::ChannelObject* {
+ return p_->FindObjectInChannel(channel);
+}
+
+auto SingletonStorage::GetAllChannelId() -> std::vector<int> {
+ return p_->GetAllChannelId();
+}
+
+auto SingletonStorage::SetObjectInChannel(int channel,
+ std::unique_ptr<ChannelObject> p_obj)
+ -> GpgFrontend::ChannelObject* {
+ return p_->SetObjectInChannel(channel, std::move(p_obj));
+}
+
+}; // namespace GpgFrontend \ No newline at end of file
diff --git a/src/core/function/basic/SingletonStorage.h b/src/core/function/basic/SingletonStorage.h
new file mode 100644
index 00000000..04fb2f07
--- /dev/null
+++ b/src/core/function/basic/SingletonStorage.h
@@ -0,0 +1,86 @@
+/**
+ * Copyright (C) 2021 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
+
+namespace GpgFrontend {
+
+class ChannelObject;
+
+class GPGFRONTEND_CORE_EXPORT SingletonStorage {
+ public:
+ /**
+ * @brief
+ *
+ */
+ SingletonStorage() noexcept;
+
+ /**
+ * @brief
+ *
+ */
+ ~SingletonStorage();
+
+ /**
+ * @brief
+ *
+ * @param channel
+ */
+ void ReleaseChannel(int channel);
+
+ /**
+ * @brief
+ *
+ * @param channel
+ * @return T*
+ */
+ auto FindObjectInChannel(int channel) -> ChannelObject*;
+
+ /**
+ * @brief Get all the channel ids
+ *
+ * @return std::vector<int>
+ */
+ auto GetAllChannelId() -> std::vector<int>;
+
+ /**
+ * @brief Set a new object in channel object
+ *
+ * @param channel
+ * @param p_obj
+ * @return T*
+ */
+ auto SetObjectInChannel(int channel, std::unique_ptr<ChannelObject> p_obj)
+ -> ChannelObject*;
+
+ private:
+ class Impl;
+ std::unique_ptr<Impl> p_;
+};
+
+} // namespace GpgFrontend \ No newline at end of file
diff --git a/src/core/function/basic/SingletonStorageCollection.cpp b/src/core/function/basic/SingletonStorageCollection.cpp
new file mode 100644
index 00000000..a5eb1dc0
--- /dev/null
+++ b/src/core/function/basic/SingletonStorageCollection.cpp
@@ -0,0 +1,104 @@
+/**
+ * Copyright (C) 2021 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
+ *
+ */
+
+#include "SingletonStorageCollection.h"
+
+#include <shared_mutex>
+
+#include "core/function/basic/SingletonStorage.h"
+
+namespace GpgFrontend {
+
+class SingletonStorageCollection::Impl {
+ public:
+ /**
+ * @brief Get the Instance object
+ *
+ * @return SingletonStorageCollection*
+ */
+ static auto GetInstance(bool force_refresh) -> SingletonStorageCollection* {
+ static SingletonStorageCollection* instance = nullptr;
+
+ if (force_refresh || instance == nullptr) {
+ instance = new SingletonStorageCollection();
+ SPDLOG_DEBUG("new single storage collection created: {}",
+ static_cast<void*>(instance));
+ }
+
+ return instance;
+ }
+
+ /**
+ * @brief Get the Singleton Storage object
+ *
+ * @param singleton_function_object
+ * @return SingletonStorage*
+ */
+ auto GetSingletonStorage(const std::type_info& type_id) -> SingletonStorage* {
+ const auto hash = type_id.hash_code();
+
+ while (true) {
+ decltype(storages_map_.end()) ins_it;
+ {
+ std::shared_lock<std::shared_mutex> lock(storages_mutex_);
+ ins_it = storages_map_.find(hash);
+ }
+ if (ins_it == storages_map_.end()) {
+ {
+ std::unique_lock<std::shared_mutex> lock(storages_mutex_);
+ storages_map_.insert({hash, std::make_unique<SingletonStorage>()});
+ }
+ SPDLOG_TRACE("hash: {} created, storage address: {} type_name: {}",
+ hash, static_cast<void*>(&storages_map_), type_id.name());
+ continue;
+ }
+ return ins_it->second.get();
+ }
+ }
+
+ private:
+ std::shared_mutex storages_mutex_; ///< mutex for storages_map_
+ std::map<size_t, std::unique_ptr<SingletonStorage>> storages_map_;
+};
+
+SingletonStorageCollection::SingletonStorageCollection() noexcept
+ : p_(std::make_unique<Impl>()) {}
+
+SingletonStorageCollection::~SingletonStorageCollection() = default;
+
+auto SingletonStorageCollection::GetSingletonStorage(
+ const std::type_info& type_id) -> GpgFrontend::SingletonStorage* {
+ return p_->GetSingletonStorage(type_id);
+}
+
+auto GpgFrontend::SingletonStorageCollection::GetInstance(
+ bool force_refresh = false) -> GpgFrontend::SingletonStorageCollection* {
+ return Impl::GetInstance(force_refresh);
+}
+
+} // namespace GpgFrontend \ No newline at end of file
diff --git a/src/core/function/basic/SingletonStorageCollection.h b/src/core/function/basic/SingletonStorageCollection.h
new file mode 100644
index 00000000..16a72fd4
--- /dev/null
+++ b/src/core/function/basic/SingletonStorageCollection.h
@@ -0,0 +1,69 @@
+/**
+ * Copyright (C) 2021 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
+
+namespace GpgFrontend {
+
+class SingletonStorage;
+
+class GPGFRONTEND_CORE_EXPORT SingletonStorageCollection {
+ public:
+ /**
+ * @brief Get the Instance object
+ *
+ * @return SingletonStorageCollection*
+ */
+ static auto GetInstance(bool force_refresh) -> SingletonStorageCollection*;
+
+ /**
+ * @brief Get the Singleton Storage object
+ *
+ * @param singleton_function_object
+ * @return SingletonStorage*
+ */
+ auto GetSingletonStorage(const std::type_info&) -> SingletonStorage*;
+
+ private:
+ class Impl;
+ std::unique_ptr<Impl> p_;
+
+ /**
+ * @brief
+ *
+ */
+ SingletonStorageCollection() noexcept;
+
+ /**
+ * @brief
+ *
+ */
+ ~SingletonStorageCollection();
+};
+
+} // namespace GpgFrontend \ No newline at end of file