Implement store as an explicit atomic operation.

webrtc/system_wrappers/source/trace_impl.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 524 matching lines @@
   if (trace) {
     int ret_val = trace->TraceFileImpl(file_name);
     ReturnTrace();
     return ret_val;
   }
   return -1;
 }
 
 // static
 void Trace::set_level_filter(int filter) {
-  rtc::AtomicOps::Store(&level_filter_, filter);
+  rtc::AtomicOps::ReleaseStore(&level_filter_, filter);
 }
 
 // static
 int Trace::level_filter() {
-  return rtc::AtomicOps::Load(&level_filter_);
+  return rtc::AtomicOps::AcquireLoad(&level_filter_);
 }
 
 // static
 int32_t Trace::SetTraceFile(const char* file_name,
                             const bool add_file_counter) {
   TraceImpl* trace = TraceImpl::GetTrace();
   if (trace) {
     int ret_val = trace->SetTraceFileImpl(file_name, add_file_counter);
     ReturnTrace();
     return ret_val;
@@ skipping 29 matching lines @@
         va_end(args);
         buff = temp_buff;
       }
       trace->AddImpl(level, module, id, buff);
     }
     ReturnTrace();
   }
 }
 
 }  // namespace webrtc