solidarity transport

web/node_modules/@parcel/watcher/src/Backend.hh

@@ -0,0 +1,37 @@
+#ifndef BACKEND_H
+#define BACKEND_H
+
+#include "Event.hh"
+#include "Watcher.hh"
+#include "Signal.hh"
+#include <thread>
+
+class Backend {
+public:
+  virtual ~Backend();
+  void run();
+  void notifyStarted();
+
+  virtual void start();
+  virtual void writeSnapshot(WatcherRef watcher, std::string *snapshotPath) = 0;
+  virtual void getEventsSince(WatcherRef watcher, std::string *snapshotPath) = 0;
+  virtual void subscribe(WatcherRef watcher) = 0;
+  virtual void unsubscribe(WatcherRef watcher) = 0;
+
+  static std::shared_ptr<Backend> getShared(std::string backend);
+
+  void watch(WatcherRef watcher);
+  void unwatch(WatcherRef watcher);
+  void unref();
+  void handleWatcherError(WatcherError &err);
+
+  std::mutex mMutex;
+  std::thread mThread;
+private:
+  std::unordered_set<WatcherRef> mSubscriptions;
+  Signal mStartedSignal;
+
+  void handleError(std::exception &err);
+};
+
+#endif