1 // Copyright 2020 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_FUCHSIA_SCOPED_FX_LOGGER_H_ 6 #define BASE_FUCHSIA_SCOPED_FX_LOGGER_H_ 7 8 #include <fidl/fuchsia.logger/cpp/fidl.h> 9 #include <lib/syslog/structured_backend/cpp/fuchsia_syslog.h> 10 #include <lib/zx/socket.h> 11 #include <stdint.h> 12 13 #include <string> 14 #include <string_view> 15 #include <vector> 16 17 #include "base/base_export.h" 18 19 namespace base { 20 21 // Emits log lines to a logger created via the specified LogSink. 22 // This class is thread-safe. 23 class BASE_EXPORT ScopedFxLogger { 24 public: 25 ScopedFxLogger(); 26 ~ScopedFxLogger(); 27 28 ScopedFxLogger(ScopedFxLogger&& other); 29 ScopedFxLogger& operator=(ScopedFxLogger&& other); 30 31 // Returns an instance connected to the process' incoming LogSink service. 32 // The returned instance has a single tag attributing the calling process in 33 // some way (e.g. by Component or process name). 34 // Additional tags may optionally be specified via `tags`. 35 static ScopedFxLogger CreateForProcess( 36 std::vector<std::string_view> tags = {}); 37 38 // Returns an instance connected to the specified LogSink. 39 static ScopedFxLogger CreateFromLogSink( 40 fidl::ClientEnd<fuchsia_logger::LogSink> client_end, 41 std::vector<std::string_view> tags = {}); 42 43 void LogMessage(std::string_view file, 44 uint32_t line_number, 45 std::string_view msg, 46 FuchsiaLogSeverity severity); 47 is_valid()48 bool is_valid() const { return socket_.is_valid(); } 49 50 private: 51 ScopedFxLogger(std::vector<std::string_view> tags, zx::socket socket); 52 53 // For thread-safety these members should be treated as read-only. 54 // They are non-const only to allow move-assignment of ScopedFxLogger. 55 std::vector<std::string> tags_; 56 zx::socket socket_; 57 }; 58 59 } // namespace base 60 61 #endif // BASE_FUCHSIA_SCOPED_FX_LOGGER_H_ 62