parallel-executor.h

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// Copyright 2012 Cloudera Inc.
//
// 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.


#ifndef IMPALA_RUNTIME_PARALLEL_EXECUTOR_H
#define IMPALA_RUNTIME_PARALLEL_EXECUTOR_H

#include <boost/function.hpp>
#include <boost/thread/mutex.hpp>

#include "common/status.h"
#include "util/collection-metrics.h"

namespace impala {

class ParallelExecutor {
 public:
  typedef boost::function<Status (void* arg)> Function;

  //
  static Status Exec(Function function, void** args, int num_args,
      StatsMetric<double>* latencies = NULL);

 private:
  //
  static void Worker(Function function, void* arg, boost::mutex* lock, Status* status,
      StatsMetric<double>* latencies);
};

}

#endif