refactor unlink'd behavior to always work with handles

repertory/librepertory/include/file_manager/file_manager.hpp

@@ -61,14 +61,14 @@ private:
   i_provider &provider_;
 
 private:
-  std::unordered_map<std::string, std::shared_ptr<i_closeable_open_file>>
-      closed_file_lookup_;
   std::unique_ptr<i_file_mgr_db> mgr_db_;
   std::atomic<std::uint64_t> next_handle_{0U};
   mutable std::recursive_mutex open_file_mtx_;
   std::unordered_map<std::string, std::shared_ptr<i_closeable_open_file>>
       open_file_lookup_;
   stop_type stop_requested_{false};
+  std::unordered_map<std::uint64_t, std::shared_ptr<i_closeable_open_file>>
+      unlinked_file_lookup_;
   std::unordered_map<std::string, std::unique_ptr<upload>> upload_lookup_;
   mutable std::mutex upload_mtx_;
   std::condition_variable upload_notify_;
@@ -78,7 +78,7 @@ private:
   void close_timed_out_files();
 
   [[nodiscard]] auto get_open_file_by_handle(std::uint64_t handle,
-                                             bool &is_closed) const
+                                             bool &is_unlinked) const
       -> std::shared_ptr<i_closeable_open_file>;
 
   [[nodiscard]] auto get_open_file_count(const std::string &api_path) const

repertory/librepertory/src/file_manager/file_manager.cpp

@@ -80,8 +80,8 @@ void file_manager::close(std::uint64_t handle) {
   REPERTORY_USES_FUNCTION_NAME();
 
   unique_recur_mutex_lock file_lock(open_file_mtx_);
-  bool is_closed{};
-  auto closeable_file = get_open_file_by_handle(handle, is_closed);
+  bool is_unlinked{};
+  auto closeable_file = get_open_file_by_handle(handle, is_unlinked);
   if (not closeable_file) {
     return;
   }
@@ -90,11 +90,13 @@ void file_manager::close(std::uint64_t handle) {
   closeable_file->remove(handle);
 
   file_lock.lock();
-  if (not is_closed || closeable_file->get_open_file_count() != 0U) {
-    return;
+  if (is_unlinked) {
+    unlinked_file_lookup_.erase(handle);
   }
 
-  closed_file_lookup_.erase(closeable_file->get_api_path());
+  if (not is_unlinked || closeable_file->get_open_file_count() != 0U) {
+    return;
+  }
   file_lock.unlock();
 
   closeable_file->close();
@@ -310,22 +312,16 @@ auto file_manager::get_next_handle() -> std::uint64_t {
 }
 
 auto file_manager::get_open_file_by_handle(std::uint64_t handle,
-                                           bool &is_closed) const
+                                           bool &is_unlinked) const
     -> std::shared_ptr<i_closeable_open_file> {
   REPERTORY_USES_FUNCTION_NAME();
 
-  {
-    auto file_iter = std::ranges::find_if(
-        closed_file_lookup_, [&handle](auto &&item) -> bool {
-          return item.second->has_handle(handle);
-        });
-    if (file_iter != closed_file_lookup_.end()) {
-      is_closed = true;
-      return file_iter->second;
-    }
+  if (unlinked_file_lookup_.contains(handle)) {
+    is_unlinked = true;
+    unlinked_file_lookup_.at(handle);
   }
 
-  is_closed = false;
+  is_unlinked = false;
   auto file_iter =
       std::ranges::find_if(open_file_lookup_, [&handle](auto &&item) -> bool {
         return item.second->has_handle(handle);
@@ -349,11 +345,6 @@ auto file_manager::get_open_file(const std::string &api_path,
     return true;
   }
 
-  if (closed_file_lookup_.contains(api_path)) {
-    file = closed_file_lookup_.at(api_path);
-    return true;
-  }
-
   return false;
 }
 
@@ -366,8 +357,8 @@ auto file_manager::get_open_file(std::uint64_t handle, bool write_supported,
   }
 
   unique_recur_mutex_lock open_lock(open_file_mtx_);
-  bool is_closed{};
-  auto file_ptr = get_open_file_by_handle(handle, is_closed);
+  bool is_unlinked{};
+  auto file_ptr = get_open_file_by_handle(handle, is_unlinked);
   if (not file_ptr) {
     return false;
   }
@@ -380,10 +371,12 @@ auto file_manager::get_open_file(std::uint64_t handle, bool write_supported,
             : 0U,
         file_ptr->get_filesystem_item(), file_ptr->get_open_data(), provider_,
         *this);
-    writeable_file->set_unlinked(is_closed);
-    if (is_closed) {
+    writeable_file->set_unlinked(is_unlinked);
+    if (is_unlinked) {
       writeable_file->set_unlinked_meta(file_ptr->get_unlinked_meta());
-      closed_file_lookup_[file_ptr->get_api_path()] = writeable_file;
+      for (const auto &[handle, ofd] : writeable_file->get_open_data()) {
+        unlinked_file_lookup_[handle] = writeable_file;
+      }
     } else {
       open_file_lookup_[file_ptr->get_api_path()] = writeable_file;
     }
@@ -730,23 +723,15 @@ auto file_manager::remove_file(const std::string &api_path) -> api_error {
     return api_error::success;
   }
 
-  if (closed_file_lookup_.contains(api_path)) {
-    auto closed_file = closed_file_lookup_.at(api_path);
-    closed_file_lookup_[api_path] = file_iter->second;
-
-    for (auto &[handle, ofd] : closed_file->get_open_data()) {
-      closed_file_lookup_.at(api_path)->add(handle, ofd, false);
-    }
-  } else {
-    closed_file_lookup_[api_path] = file_iter->second;
-  }
-
+  auto closed_file = file_iter->second;
   open_file_lookup_.erase(api_path);
 
-  auto closed_file = closed_file_lookup_.at(api_path);
   auto allocated = closed_file->get_allocated();
   closed_file->set_unlinked(true);
   closed_file->set_unlinked_meta(meta);
+  for (const auto &[handle, ofd] : closed_file->get_open_data()) {
+    unlinked_file_lookup_[handle] = closed_file;
+  }
   open_lock.unlock();
 
   if (not allocated) {