Atmosphere/stratosphere/ams_mitm/source/sysupdater/sysupdater_async_impl.hpp

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#include "sysupdater_thread_allocator.hpp"
namespace ams::mitm::sysupdater {
class ErrorContextHolder {
private:
err::ErrorContext error_context;
public:
constexpr ErrorContextHolder() : error_context{} { /* ... */ }
virtual ~ErrorContextHolder() { /* ... */ }
template<typename T>
Result SaveErrorContextIfFailed(T &async, Result result) {
if (R_FAILED(result)) {
async.GetErrorContext(std::addressof(this->error_context));
return result;
}
return ResultSuccess();
}
template<typename T>
Result GetAndSaveErrorContext(T &async) {
R_TRY(this->SaveErrorContextIfFailed(async, async.Get()));
return ResultSuccess();
}
template<typename T>
Result SaveInternalTaskErrorContextIfFailed(T &async, Result result) {
if (R_FAILED(result)) {
async.CreateErrorContext(std::addressof(this->error_context));
return result;
}
return ResultSuccess();
}
const err::ErrorContext &GetErrorContextImpl() {
return this->error_context;
}
};
class AsyncBase {
public:
virtual ~AsyncBase() { /* ... */ }
Result Cancel() {
this->CancelImpl();
return ResultSuccess();
}
static Result ToAsyncResult(Result result);
virtual Result GetErrorContext(sf::Out<err::ErrorContext> out) {
*out = {};
return ResultSuccess();
}
private:
virtual void CancelImpl() = 0;
};
class AsyncResultBase : public AsyncBase {
public:
Result Get() {
return ToAsyncResult(this->GetImpl());
}
private:
virtual Result GetImpl() = 0;
};
/* NOTE: Based off of ns AsyncPrepareCardUpdateImpl. */
/* We don't implement the RequestServer::ManagedStop details, as we don't implement stoppable request list. */
class AsyncPrepareSdCardUpdateImpl : public AsyncResultBase, private ErrorContextHolder {
private:
Result result;
os::SystemEvent event;
std::optional<ThreadInfo> thread_info;
ncm::InstallTaskBase *task;
public:
AsyncPrepareSdCardUpdateImpl(ncm::InstallTaskBase *task) : result(ResultSuccess()), event(os::EventClearMode_ManualClear, true), thread_info(), task(task) { /* ... */ }
virtual ~AsyncPrepareSdCardUpdateImpl();
os::SystemEvent &GetEvent() { return this->event; }
virtual Result GetErrorContext(sf::Out<err::ErrorContext> out) override {
*out = ErrorContextHolder::GetErrorContextImpl();
return ResultSuccess();
}
Result Run();
private:
Result Execute();
virtual void CancelImpl() override;
virtual Result GetImpl() override { return this->result; }
};
}