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#include "run_loop_impl.hpp"
#include <mbgl/util/thread_local.hpp>
#include <QCoreApplication>
#include <cassert>
#include <functional>
#include <utility>
namespace {
using namespace mbgl::util;
static ThreadLocal<RunLoop>& current = *new ThreadLocal<RunLoop>;
}
namespace mbgl {
namespace util {
void RunLoop::Impl::onReadEvent(int fd) {
readPoll[fd].second(fd, Event::Read);
}
void RunLoop::Impl::onWriteEvent(int fd) {
writePoll[fd].second(fd, Event::Write);
}
RunLoop* RunLoop::Get() {
return current.get();
}
RunLoop::RunLoop(Type type) : impl(std::make_unique<Impl>()) {
// XXX: We should probably throw an runtime exception
// here instead of creating a QCoreApplication which is
// way too intrusive. This is a hack mostly for the unit
// tests to work, as you always need a QCoreApplication
// prior to run a Qt app.
if (!QCoreApplication::instance()) {
static const char* argv[] = { "mbgl" };
static int argc = 1;
// We need to keep this around because it would otherwise crash
// on Qt4 due to a bug on QNetworkConfigurationManager when recreating
// a QCoreApplication: https://bugreports.qt.io/browse/QTBUG-36897
static auto* app = new QCoreApplication(argc, const_cast<char**>(argv));
Q_UNUSED(app);
}
switch (type) {
case Type::New:
impl->loop = std::make_unique<QEventLoop>();
break;
case Type::Default:
// Use QCoreApplication::instance().
break;
}
impl->type = type;
current.set(this);
impl->async = std::make_unique<AsyncTask>(std::bind(&RunLoop::process, this));
}
RunLoop::~RunLoop() {
MBGL_VERIFY_THREAD(tid);
current.set(nullptr);
}
LOOP_HANDLE RunLoop::getLoopHandle() {
throw std::runtime_error("Should not be used in Qt.");
return nullptr;
}
void RunLoop::push(std::shared_ptr<WorkTask> task) {
withMutex([&] { queue.push(task); });
impl->async->send();
}
void RunLoop::run() {
MBGL_VERIFY_THREAD(tid);
if (impl->type == Type::Default) {
QCoreApplication::instance()->exec();
} else {
impl->loop->exec();
}
}
void RunLoop::stop() {
invoke([&] {
if (impl->type == Type::Default) {
QCoreApplication::instance()->exit();
} else {
impl->loop->exit();
}
});
}
void RunLoop::runOnce() {
MBGL_VERIFY_THREAD(tid);
if (impl->type == Type::Default) {
QCoreApplication::instance()->processEvents();
} else {
impl->loop->processEvents();
}
}
void RunLoop::addWatch(int fd, Event event, std::function<void(int, Event)>&& cb) {
MBGL_VERIFY_THREAD(tid);
if (event == Event::Read || event == Event::ReadWrite) {
auto notifier = std::make_unique<QSocketNotifier>(fd, QSocketNotifier::Read);
QObject::connect(notifier.get(), SIGNAL(activated(int)), impl.get(), SLOT(onReadEvent(int)));
impl->readPoll[fd] = WatchPair(std::move(notifier), std::move(cb));
}
if (event == Event::Write || event == Event::ReadWrite) {
auto notifier = std::make_unique<QSocketNotifier>(fd, QSocketNotifier::Write);
QObject::connect(notifier.get(), SIGNAL(activated(int)), impl.get(), SLOT(onWriteEvent(int)));
impl->writePoll[fd] = WatchPair(std::move(notifier), std::move(cb));
}
}
void RunLoop::removeWatch(int fd) {
MBGL_VERIFY_THREAD(tid);
auto writePollIter = impl->writePoll.find(fd);
if (writePollIter != impl->writePoll.end()) {
impl->writePoll.erase(writePollIter);
}
auto readPollIter = impl->readPoll.find(fd);
if (readPollIter != impl->readPoll.end()) {
impl->readPoll.erase(readPollIter);
}
}
}
}
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