96 lines
1.9 KiB
C++
96 lines
1.9 KiB
C++
#ifndef MBGL_UTIL_ASYNC_QUEUE
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#define MBGL_UTIL_ASYNC_QUEUE
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#include "std.hpp"
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#include <uv.h>
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#include <thread>
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#include <mutex>
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#include <functional>
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#include <queue>
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#include <string>
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#if UV_VERSION_MAJOR == 0 && UV_VERSION_MINOR <= 10
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#define UV_ASYNC_PARAMS(handle) uv_async_t *handle, int
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#else
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#define UV_ASYNC_PARAMS(handle) uv_async_t *handle
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#endif
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namespace 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(fn) {
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async.data = this;
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uv_async_init(loop, &async, [](UV_ASYNC_PARAMS(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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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(util::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((uv_handle_t *)&async, [](uv_handle_t *handle) {
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delete reinterpret_cast<AsyncQueue *>(handle->data);
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});
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}
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void ref() {
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uv_ref((uv_handle_t *)&async);
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}
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void unref() {
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uv_unref((uv_handle_t *)&async);
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}
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private:
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~AsyncQueue() {
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}
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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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}
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}
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#endif
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