rtc_event_log_output_file.h (1868B)
1 /* 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef API_RTC_EVENT_LOG_OUTPUT_FILE_H_ 12 #define API_RTC_EVENT_LOG_OUTPUT_FILE_H_ 13 14 #include <stddef.h> 15 #include <stdio.h> 16 17 #include <string> 18 19 #include "absl/strings/string_view.h" 20 #include "api/rtc_event_log_output.h" 21 #include "rtc_base/system/file_wrapper.h" 22 23 namespace webrtc { 24 25 class RtcEventLogOutputFile final : public RtcEventLogOutput { 26 public: 27 static const size_t kMaxReasonableFileSize; // Explanation at declaration. 28 29 // Unlimited/limited-size output file (by filename). 30 explicit RtcEventLogOutputFile(const std::string& file_name); 31 RtcEventLogOutputFile(const std::string& file_name, size_t max_size_bytes); 32 33 // Limited-size output file (by FILE*). This class takes ownership 34 // of the FILE*, and closes it on destruction. 35 RtcEventLogOutputFile(FILE* file, size_t max_size_bytes); 36 37 ~RtcEventLogOutputFile() override = default; 38 39 bool IsActive() const override; 40 41 bool Write(absl::string_view output) override; 42 43 private: 44 RtcEventLogOutputFile(FileWrapper file, size_t max_size_bytes); 45 46 // IsActive() can be called either from outside or from inside, but we don't 47 // want to incur the overhead of a virtual function call if called from inside 48 // some other function of this class. 49 inline bool IsActiveInternal() const; 50 51 // Maximum size, or zero for no limit. 52 const size_t max_size_bytes_; 53 size_t written_bytes_{0}; 54 FileWrapper file_; 55 }; 56 57 } // namespace webrtc 58 59 #endif // API_RTC_EVENT_LOG_OUTPUT_FILE_H_