1 // Copyright 2022 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include <stdarg.h> 17 18 #include "pw_log_string/config.h" 19 #include "pw_preprocessor/compiler.h" 20 #include "pw_preprocessor/util.h" 21 22 // This macro implements PW_LOG using pw_log_string_HandleMessage. 23 // 24 // This is the log macro frontend that funnels everything into the C-based 25 // message hangler facade, i.e. pw_log_string_HandleMessage. It's not efficient 26 // at the callsite, since it passes many arguments. 27 // 28 // Users can configure exactly what is passed to pw_log_string_HandleMessage by 29 // providing their own PW_LOG_STRING_CONFIG_HANDLE_MESSAGE implementation. 30 // 31 #define PW_LOG_STRING_HANDLE_MESSAGE PW_LOG_STRING_CONFIG_HANDLE_MESSAGE 32 33 PW_EXTERN_C_START 34 35 // Invokes pw_log_string_HandleMessageVaList, this is implemented by the facade. 36 void pw_log_string_HandleMessage(int level, 37 unsigned int flags, 38 const char* module_name, 39 const char* file_name, 40 int line_number, 41 const char* message, 42 ...) PW_PRINTF_FORMAT(6, 7); 43 44 /// Logs a message with the listed attributes. This must be implemented by the 45 /// backend. 46 void pw_log_string_HandleMessageVaList(int level, 47 unsigned int flags, 48 const char* module_name, 49 const char* file_name, 50 int line_number, 51 const char* message, 52 va_list args); 53 54 PW_EXTERN_C_END 55