text: /*
   *  Copyright (c) 2011 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 SYSTEM_WRAPPERS_SOURCE_TRACE_POSIX_H_
  #define SYSTEM_WRAPPERS_SOURCE_TRACE_POSIX_H_
  
  #include "rtc_base/criticalsection.h"
  #include "system_wrappers/source/trace_impl.h"
  
  namespace webrtc {
  
  class TracePosix : public TraceImpl {
   public:
    TracePosix();
    ~TracePosix() override = default;
  
    // This method can be called on several different threads different from
    // the creating thread.
    int32_t AddTime(char* trace_message, const TraceLevel level) const override;
  
    int32_t AddDateTimeInfo(char* trace_message) const override;
  
   private:
    volatile mutable uint32_t  prev_api_tick_count_;
    volatile mutable uint32_t  prev_tick_count_;
  
    rtc::CriticalSection crit_sect_;
  };
  
  }  // namespace webrtc
  
  #endif  // SYSTEM_WRAPPERS_SOURCE_TRACE_POSIX_H_
  