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       1                 :             : /*
       2                 :             :  * Copyright 2025 Jinwoo Sung
       3                 :             :  *
       4                 :             :  * Licensed under the Apache License, Version 2.0 (the "License");
       5                 :             :  * you may not use this file except in compliance with the License.
       6                 :             :  * You may obtain a copy of the License at
       7                 :             :  *
       8                 :             :  *     http://www.apache.org/licenses/LICENSE-2.0
       9                 :             :  *
      10                 :             :  * Unless required by applicable law or agreed to in writing, software
      11                 :             :  * distributed under the License is distributed on an "AS IS" BASIS,
      12                 :             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      13                 :             :  * See the License for the specific language governing permissions and
      14                 :             :  * limitations under the License.
      15                 :             :  */
      16                 :             : 
      17                 :             : #pragma once
      18                 :             : #include <exception>
      19                 :             : #include <memory>
      20                 :             : #include <string>
      21                 :             : #include <string_view>
      22                 :             : #include <utility>
      23                 :             : 
      24                 :             : #include "wirestead/diagnostics/logger.hpp"
      25                 :             : 
      26                 :             : namespace wirestead::diagnostics {
      27                 :             : // Notification exceptions never become another user error notification.
      28                 :             : // Even a logging failure must not escape an I/O completion.
      29                 :             : template <class Callback, class... Args>
      30                 :       14824 : bool invoke_callback(std::string_view component, std::string_view operation, const Callback& callback,
      31                 :             :                      Args&&... args) noexcept {
      32         [ +  + ]:       14824 :   if (!callback) return true;
      33                 :             :   try {
      34                 :       14530 :     callback(std::forward<Args>(args)...);
      35                 :       14486 :     return true;
      36                 :          69 :   } catch (const std::exception& error) {
      37                 :             :     try {
      38                 :          78 :       WIRESTEAD_LOG_ERROR(component, operation, std::string("Exception in callback: ") + error.what());
      39                 :           0 :     } catch (...) {
      40                 :             :     }
      41                 :          34 :   } catch (...) {
      42                 :             :     try {
      43                 :          17 :       WIRESTEAD_LOG_ERROR(component, operation, "Unknown exception in callback");
      44                 :           0 :     } catch (...) {
      45                 :             :     }
      46                 :             :   }
      47                 :          43 :   return false;
      48                 :             : }
      49                 :             : template <class Callback, class... Args>
      50                 :       16160 : bool invoke_callback(std::string_view component, std::string_view operation, const std::shared_ptr<Callback>& callback,
      51                 :             :                      Args&&... args) noexcept {
      52   [ +  +  +  + ]:       16160 :   return !callback || invoke_callback(component, operation, *callback, std::forward<Args>(args)...);
      53                 :             : }
      54                 :             : }  // namespace wirestead::diagnostics