added task scheduler and refactored remove deleted items

repertory/librepertory/include/providers/base_provider.hpp

@@ -55,16 +55,14 @@ private:
 private:
   void add_all_items(const stop_type &stop_requested);
 
-  void get_removed_items(std::deque<removed_item> &directories,
-                         std::deque<removed_item> &files,
-                         const stop_type &stop_requested) const;
-
-  void process_removed_directories(std::deque<removed_item> &removed_list,
+  void process_removed_directories(std::deque<removed_item> removed_list,
                                    const stop_type &stop_requested);
 
-  void process_removed_files(std::deque<removed_item> &removed_list,
+  void process_removed_files(std::deque<removed_item> removed_list,
                              const stop_type &stop_requested);
 
+  void process_removed_items(const stop_type &stop_requested);
+
   void remove_deleted_items(const stop_type &stop_requested);
 
   void remove_unmatched_source_files(const stop_type &stop_requested);

repertory/librepertory/include/utils/polling.hpp

@@ -35,7 +35,7 @@ public:
     second,
   };
 
-  struct polling_item {
+  struct polling_item final {
     std::string name;
     frequency freq;
     std::function<void(const stop_type &stop_requested)> action;

repertory/librepertory/include/utils/tasks.hpp

@@ -0,0 +1,74 @@
+/*
+  Copyright <2018-2024> <scott.e.graves@protonmail.com>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+*/
+#ifndef REPERTORY_INCLUDE_UTILS_TASKS_HPP_
+#define REPERTORY_INCLUDE_UTILS_TASKS_HPP_
+
+#include "types/repertory.hpp"
+
+namespace repertory {
+class app_config;
+
+class tasks final {
+public:
+  struct task_item final {
+    std::function<void(const stop_type &stop_requested)> action;
+  };
+
+public:
+  tasks(const tasks &) = delete;
+  tasks(tasks &&) = delete;
+  auto operator=(const tasks &) -> tasks & = delete;
+  auto operator=(tasks &&) -> tasks & = delete;
+
+private:
+  tasks() = default;
+
+  ~tasks() { stop(); }
+
+private:
+  static tasks instance_;
+
+public:
+  static auto instance() -> tasks & { return instance_; }
+
+private:
+  app_config *config_{nullptr};
+  std::mutex mutex_;
+  std::condition_variable notify_;
+  std::mutex start_stop_mutex_;
+  stop_type stop_requested_{false};
+  std::vector<std::unique_ptr<std::jthread>> task_threads_;
+  std::deque<task_item> tasks_;
+
+private:
+  void task_thread();
+
+public:
+  void schedule(task_item task);
+
+  void start(app_config *config);
+
+  void stop();
+};
+} // namespace repertory
+
+#endif // REPERTORY_INCLUDE_UTILS_TASKS_HPP_