mirror-chatterino2/src/util/PostToThread.hpp
2018-07-06 19:24:35 +02:00

59 lines
1.2 KiB
C++

#pragma once
#include <QCoreApplication>
#include <QRunnable>
#include <QThreadPool>
#include <functional>
#define async_exec(a) QThreadPool::globalInstance()->start(new LambdaRunnable(a));
namespace chatterino {
class LambdaRunnable : public QRunnable
{
public:
LambdaRunnable(std::function<void()> action)
{
this->action_ = action;
}
void run()
{
this->action_();
}
private:
std::function<void()> action_;
};
// Taken from
// https://stackoverflow.com/questions/21646467/how-to-execute-a-functor-or-a-lambda-in-a-given-thread-in-qt-gcd-style
// Qt 5/4 - preferred, has least allocations
template <typename F>
static void postToThread(F &&fun, QObject *obj = qApp)
{
struct Event : public QEvent {
using Fun = typename std::decay<F>::type;
Fun fun;
Event(Fun &&fun)
: QEvent(QEvent::None)
, fun(std::move(fun))
{
}
Event(const Fun &fun)
: QEvent(QEvent::None)
, fun(fun)
{
}
~Event() override
{
fun();
}
};
QCoreApplication::postEvent(obj, new Event(std::forward<F>(fun)));
}
} // namespace chatterino