sneedmc/launcher/minecraft/mod/tasks/BasicFolderLoadTask.h
flow 10493bd44a
fix: move newly allocated resources to the main thread
This avoids them getting deleted when the worker thread exits, due to
thread affinity on the created thread.

Signed-off-by: flow <flowlnlnln@gmail.com>
2022-09-16 20:12:30 -03:00

73 lines
1.9 KiB
C++

#pragma once
#include <QDir>
#include <QMap>
#include <QObject>
#include <QThread>
#include <memory>
#include "minecraft/mod/Resource.h"
#include "tasks/Task.h"
/** Very simple task that just loads a folder's contents directly.
*/
class BasicFolderLoadTask : public Task {
Q_OBJECT
public:
struct Result {
QMap<QString, Resource::Ptr> resources;
};
using ResultPtr = std::shared_ptr<Result>;
[[nodiscard]] ResultPtr result() const { return m_result; }
public:
BasicFolderLoadTask(QDir dir) : Task(nullptr, false), m_dir(dir), m_result(new Result), m_thread_to_spawn_into(thread())
{
m_create_func = [](QFileInfo const& entry) -> Resource* {
return new Resource(entry);
};
}
BasicFolderLoadTask(QDir dir, std::function<Resource*(QFileInfo const&)> create_function)
: Task(nullptr, false), m_dir(dir), m_result(new Result), m_create_func(std::move(create_function)), m_thread_to_spawn_into(thread())
{}
[[nodiscard]] bool canAbort() const override { return true; }
bool abort() override
{
m_aborted.store(true);
return true;
}
void executeTask() override
{
if (thread() != m_thread_to_spawn_into)
connect(this, &Task::finished, this->thread(), &QThread::quit);
m_dir.refresh();
for (auto entry : m_dir.entryInfoList()) {
auto resource = m_create_func(entry);
resource->moveToThread(m_thread_to_spawn_into);
m_result->resources.insert(resource->internal_id(), resource);
}
if (m_aborted)
emit finished();
else
emitSucceeded();
}
private:
QDir m_dir;
ResultPtr m_result;
std::atomic<bool> m_aborted = false;
std::function<Resource*(QFileInfo const&)> m_create_func;
/** This is the thread in which we should put new mod objects */
QThread* m_thread_to_spawn_into;
};