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#include "run_loop_impl.hpp"
#include <mbgl/util/async_task.hpp>
#include <mbgl/util/run_loop.hpp>
#include <atomic>
#include <functional>
namespace mbgl {
namespace util {
class AsyncTask::Impl : public RunLoop::Impl::Runnable {
public:
Impl(std::function<void()>&& fn)
: queued(true), task(std::move(fn)) {
}
~Impl() {
queued = true;
loop->removeRunnable(this);
}
void maySend() {
if (queued) {
queued = false;
loop->addRunnable(this);
}
}
TimePoint dueTime() const override {
return due;
}
void runTask() override {
if (!queued) {
queued = true;
loop->removeRunnable(this);
task();
}
}
private:
// Always expired, run immediately.
const TimePoint due = Clock::now();
RunLoop::Impl* loop = reinterpret_cast<RunLoop::Impl*>(RunLoop::getLoopHandle());
// TODO: Use std::atomic_flag if we ever drop
// support for ARMv5
std::atomic<bool> queued;
std::function<void()> task;
};
AsyncTask::AsyncTask(std::function<void()>&& fn)
: impl(std::make_unique<Impl>(std::move(fn))) {
}
AsyncTask::~AsyncTask() = default;
void AsyncTask::send() {
impl->maySend();
}
} // namespace util
} // namespace mbgl
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