text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "config.h"
  #include "platform/scheduler/TracedTask.h"
  
  namespace blink {
  
  volatile int TracedTask::s_nextFlowTraceID = 0;
  
  void TracedTask::run() const
  {
      TRACE_EVENT_FLOW_END0("blink", m_traceName, MANGLE(m_flowTraceID));
  
      TRACE_EVENT2("blink", m_traceName,
          "src_file", m_location.fileName(),
          "src_func", m_location.functionName());
  
      m_task();
  }
  
  TracedTask::TracedTask(const Task& task, const TraceLocation& location, const char* traceName)
      : m_task(task)
      , m_location(location)
      , m_traceName(traceName)
  {
      bool tracingEnabled;
      TRACE_EVENT_CATEGORY_GROUP_ENABLED("blink", &tracingEnabled);
  
      if (tracingEnabled) {
          // atomicIncrement is slow so we only do it if tracing is enabled
          m_flowTraceID = static_cast<uint64_t>(atomicIncrement(&s_nextFlowTraceID));
  
          TRACE_EVENT_FLOW_BEGIN2("blink", m_traceName, MANGLE(m_flowTraceID),
          "src_file", m_location.fileName(),
          "src_func", m_location.functionName());
      }
  }
  
  } // namespace blink
  