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/**
* Copyright (C) 2021 Saturneric
*
* 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.
*
* The source code version of this software was modified and released
* by Saturneric<[email protected]><[email protected]> starting on May 12, 2021.
*
*/
#include "core/thread/TaskRunner.h"
#include "core/thread/Task.h"
#include "spdlog/spdlog.h"
GpgFrontend::Thread::TaskRunner::TaskRunner() = default;
GpgFrontend::Thread::TaskRunner::~TaskRunner() = default;
void GpgFrontend::Thread::TaskRunner::PostTask(Task* task) {
if (task == nullptr) {
SPDLOG_ERROR("task posted is null");
return;
}
SPDLOG_TRACE("post task: {}", task->GetFullID());
task->setParent(nullptr);
task->moveToThread(this);
{
std::lock_guard<std::mutex> lock(tasks_mutex_);
tasks.push(task);
}
quit();
}
void GpgFrontend::Thread::TaskRunner::PostScheduleTask(Task* task,
size_t seconds) {
if (task == nullptr) return;
// TODO
}
[[noreturn]] void GpgFrontend::Thread::TaskRunner::run() {
SPDLOG_TRACE("task runner runing, thread id: {}", QThread::currentThreadId());
while (true) {
if (tasks.empty()) {
SPDLOG_TRACE("no tasks to run, trapping into event loop...");
exec();
} else {
SPDLOG_TRACE("start to run task(s), queue size: {}", tasks.size());
Task* task = nullptr;
{
std::lock_guard<std::mutex> lock(tasks_mutex_);
task = std::move(tasks.front());
tasks.pop();
pending_tasks_.insert({task->GetUUID(), task});
}
if (task != nullptr) {
try {
// triger
SPDLOG_TRACE("running task {}, sequency: {}", task->GetFullID(),
task->GetSequency());
// when a signal SignalTaskEnd raise, do unregister work
connect(task, &Task::SignalTaskEnd, this, [this, task]() {
unregister_finished_task(task->GetUUID());
});
if (!task->GetSequency()) {
// if it need to run concurrently, we should create a new thread to
// run it.
auto* concurrent_thread = new QThread(nullptr);
task->setParent(nullptr);
task->moveToThread(concurrent_thread);
// start thread
concurrent_thread->start();
connect(task, &Task::SignalTaskEnd, concurrent_thread,
&QThread::quit);
// concurrent thread is responsible for deleting the task
connect(concurrent_thread, &QThread::finished, task,
&Task::deleteLater);
}
// run the task
task->run();
} catch (const std::exception& e) {
SPDLOG_ERROR("task runner: exception in task {}, exception: {}",
task->GetFullID(), e.what());
// if any exception caught, destroy the task, remove the task from the
// pending tasks
unregister_finished_task(task->GetUUID());
} catch (...) {
SPDLOG_ERROR("task runner: unknown exception in task: {}",
task->GetFullID());
// if any exception caught, destroy the task, remove the task from the
// pending tasks
unregister_finished_task(task->GetUUID());
}
}
}
}
}
/**
* @brief
*
*/
void GpgFrontend::Thread::TaskRunner::unregister_finished_task(
std::string task_uuid) {
SPDLOG_DEBUG("cleaning task {}", task_uuid);
// search in map
auto pending_task = pending_tasks_.find(task_uuid);
if (pending_task == pending_tasks_.end()) {
SPDLOG_ERROR("cannot find task in pending list: {}", task_uuid);
return;
} else {
std::lock_guard<std::mutex> lock(tasks_mutex_);
// if thread runs sequenctly, that means the thread is living in this
// thread, so we can delete it. Or, its living thread need to delete it.
if (pending_task->second->GetSequency())
pending_task->second->deleteLater();
pending_tasks_.erase(pending_task);
}
SPDLOG_DEBUG("clean task {} done", task_uuid);
}
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