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#pragma once
#include <mbgl/actor/scheduler.hpp>
#include <mbgl/actor/mailbox.hpp>
#include <mbgl/util/noncopyable.hpp>
#include <mbgl/util/util.hpp>
#include <mbgl/util/work_task.hpp>
#include <mbgl/util/work_request.hpp>
#include <atomic>
#include <functional>
#include <utility>
#include <queue>
#include <mutex>
namespace mbgl {
namespace util {
using LOOP_HANDLE = void *;
class RunLoop : public Scheduler,
private util::noncopyable {
public:
enum class Type : uint8_t {
Default,
New,
};
enum class Event : uint8_t {
None = 0,
Read = 1,
Write = 2,
ReadWrite = Read | Write,
};
RunLoop(Type type = Type::Default);
~RunLoop() override;
static RunLoop* Get();
static LOOP_HANDLE getLoopHandle();
void run();
void runOnce();
void stop();
// So far only needed by the libcurl backend.
void addWatch(int fd, Event, std::function<void(int, Event)>&& callback);
void removeWatch(int fd);
// Invoke fn(args...) on this RunLoop.
template <class Fn, class... Args>
void invoke(Fn&& fn, Args&&... args) {
std::shared_ptr<WorkTask> task = WorkTask::make(std::forward<Fn>(fn), std::forward<Args>(args)...);
push(task);
}
// Post the cancellable work fn(args...) to this RunLoop.
template <class Fn, class... Args>
std::unique_ptr<AsyncRequest>
invokeCancellable(Fn&& fn, Args&&... args) {
std::shared_ptr<WorkTask> task = WorkTask::make(std::forward<Fn>(fn), std::forward<Args>(args)...);
push(task);
return std::make_unique<WorkRequest>(task);
}
class Impl;
private:
MBGL_STORE_THREAD(tid)
using Queue = std::queue<std::shared_ptr<WorkTask>>;
void push(std::shared_ptr<WorkTask>);
void schedule(std::weak_ptr<Mailbox> mailbox) override {
invoke([mailbox] () {
Mailbox::maybeReceive(mailbox);
});
}
void withMutex(std::function<void()>&& fn) {
std::lock_guard<std::mutex> lock(mutex);
fn();
}
void process() {
Queue queue_;
withMutex([&] { queue_.swap(queue); });
while (!queue_.empty()) {
(*(queue_.front()))();
queue_.pop();
}
}
Queue queue;
std::mutex mutex;
std::unique_ptr<Impl> impl;
};
} // namespace util
} // namespace mbgl
#include <mbgl/util/work_task_impl.hpp>
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