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+/*
+ * Copyright 2015 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef RTC_BASE_LOG_SINKS_H_
+#define RTC_BASE_LOG_SINKS_H_
+
+#include <stddef.h>
+
+#include <memory>
+#include <string>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/file_rotating_stream.h"
+#include "rtc_base/logging.h"
+
+namespace rtc {
+
+// Log sink that uses a FileRotatingStream to write to disk.
+// Init() must be called before adding this sink.
+class FileRotatingLogSink : public LogSink {
+ public:
+ // `num_log_files` must be greater than 1 and `max_log_size` must be greater
+ // than 0.
+ FileRotatingLogSink(absl::string_view log_dir_path,
+ absl::string_view log_prefix,
+ size_t max_log_size,
+ size_t num_log_files);
+ ~FileRotatingLogSink() override;
+
+ FileRotatingLogSink(const FileRotatingLogSink&) = delete;
+ FileRotatingLogSink& operator=(const FileRotatingLogSink&) = delete;
+
+ // Writes the message to the current file. It will spill over to the next
+ // file if needed.
+ void OnLogMessage(const std::string& message) override;
+ void OnLogMessage(absl::string_view message) override;
+ void OnLogMessage(const std::string& message,
+ LoggingSeverity sev,
+ const char* tag) override;
+ void OnLogMessage(absl::string_view message,
+ LoggingSeverity sev,
+ const char* tag) override;
+
+ // Deletes any existing files in the directory and creates a new log file.
+ virtual bool Init();
+
+ // Disables buffering on the underlying stream.
+ bool DisableBuffering();
+
+ protected:
+ explicit FileRotatingLogSink(FileRotatingStream* stream);
+
+ private:
+ std::unique_ptr<FileRotatingStream> stream_;
+};
+
+// Log sink that uses a CallSessionFileRotatingStream to write to disk.
+// Init() must be called before adding this sink.
+class CallSessionFileRotatingLogSink : public FileRotatingLogSink {
+ public:
+ CallSessionFileRotatingLogSink(absl::string_view log_dir_path,
+ size_t max_total_log_size);
+ ~CallSessionFileRotatingLogSink() override;
+
+ CallSessionFileRotatingLogSink(const CallSessionFileRotatingLogSink&) =
+ delete;
+ CallSessionFileRotatingLogSink& operator=(
+ const CallSessionFileRotatingLogSink&) = delete;
+};
+
+} // namespace rtc
+
+#endif // RTC_BASE_LOG_SINKS_H_