//
// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

$$ This is a pump file for generating the interface and implementation of
$$ the benchmarking system's TRACE_EVENT_BENCHMARK* macros, which can take a
$$ variable number of parameters.  Pump is a python script that is part of the
$$ Google Test suite of utilities.  Description can be found here:
$$
$$ http://code.google.com/p/googletest/wiki/PumpManual
$$

#include "base/compiler_specific.h"

// clang-format off

$var MAX_ARITY = 10

$range ARITY 1..MAX_ARITY

$for ARITY [[

$range ARG 1..ARITY

#define TRACE_EVENT_BENCHMARK$(ARITY)(benchmark, $for ARG , [[event_name_$(ARG), measurement_type_$(ARG)]])\
MSVC_PUSH_DISABLE_WARNING(6326)\
class benchmark : public cobalt::trace_event::Benchmark {\
 public:\
  void Experiment() override;\
  void AnalyzeTraceEvent(\
      const scoped_refptr<cobalt::trace_event::EventParser::ScopedEvent>& event)\
      override {\

$for ARG
[[
    if (event->name() == event_name_$(ARG)) {\
      switch (measurement_type_$(ARG)) {\
        case cobalt::trace_event::FLOW_DURATION: {\
          if (event->flow_duration()) {\
            event_$(ARG)_samples_.push_back(\
                event->flow_duration()->InSecondsF());\
          }\
        } break;\
        case cobalt::trace_event::IN_SCOPE_DURATION: {\
          if (event->in_scope_duration()) {\
            event_$(ARG)_samples_.push_back(\
                event->in_scope_duration()->InSecondsF());\
          }\
        } break;\
        case cobalt::trace_event::TIME_BETWEEN_EVENT_STARTS: {\
          if (!event_$(ARG)_last_begin_time_.is_null()) {\
            event_$(ARG)_samples_.push_back(\
                (event->begin_event().timestamp() -\
                    event_$(ARG)_last_begin_time_).InSecondsF());\
          }\
        } break;\
      }\
\
      event_$(ARG)_last_begin_time_ = event->begin_event().timestamp();\
    }\

]]
  }\
  std::vector<Result> CompileResults() override {\
    std::vector<Result> results;\

$for ARG
[[
    switch (measurement_type_$(ARG)) {\
      case cobalt::trace_event::FLOW_DURATION: {\
        results.push_back(\
            Result(std::string(event_name_$(ARG)) +\
                   " flow duration in seconds", \
                   event_$(ARG)_samples_));\
      } break;\
      case cobalt::trace_event::IN_SCOPE_DURATION: {\
        results.push_back(\
            Result(std::string(event_name_$(ARG)) +\
                   " in-scope duration in seconds", \
                   event_$(ARG)_samples_));\
      } break;\
      case cobalt::trace_event::TIME_BETWEEN_EVENT_STARTS: {\
        results.push_back(\
            Result(std::string(event_name_$(ARG)) +\
                   " time between event starts in seconds", \
                   event_$(ARG)_samples_));\
      } break;\
    }\

]]
    return results;\
  }\
 private:\

$for ARG
[[
  std::vector<double> event_$(ARG)_samples_;\
  base::TimeTicks event_$(ARG)_last_begin_time_;\

]]
};\
\
TRACE_EVENT_REGISTER_BENCHMARK(benchmark)\
\
void benchmark::Experiment()\
MSVC_POP_WARNING()

]]

// clang-format on