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#pragma once
#include <uv.h>
#include <thread>
#include <mutex>
#include <functional>
#include <queue>
#include <string>
namespace node_mbgl {
namespace util {
template <typename T>
class AsyncQueue {
public:
AsyncQueue(uv_loop_t *loop, std::function<void(T &)> fn) :
callback(fn) {
async.data = this;
uv_async_init(loop, &async, [](uv_async_t* handle) {
auto q = reinterpret_cast<AsyncQueue *>(handle->data);
q->process();
});
}
~AsyncQueue() = default;
void send(T &&data) {
{
std::lock_guard<std::mutex> lock(mutex);
queue.push(std::make_unique<T>(std::move(data)));
}
uv_async_send(&async);
}
void send(std::unique_ptr<T> data) {
{
std::lock_guard<std::mutex> lock(mutex);
queue.push(std::move(data));
}
uv_async_send(&async);
}
void stop() {
uv_close((uv_handle_t *)&async, [](uv_handle_t *handle) {
delete reinterpret_cast<AsyncQueue *>(handle->data);
});
}
void ref() {
uv_ref((uv_handle_t *)&async);
}
void unref() {
uv_unref((uv_handle_t *)&async);
}
private:
void process() {
std::unique_ptr<T> item;
while (true) {
mutex.lock();
if (queue.empty()) {
mutex.unlock();
break;
}
item = std::move(queue.front());
queue.pop();
mutex.unlock();
callback(*item);
}
}
private:
std::mutex mutex;
uv_async_t async;
std::queue<std::unique_ptr<T>> queue;
std::function<void(T &)> callback;
};
}
}
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