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