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// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2015 Google Inc. All rights reserved.
// http://ceres-solver.org/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Author: sameeragarwal@google.com (Sameer Agarwal)
#ifndef CERES_INTERNAL_EXECUTION_SUMMARY_H_
#define CERES_INTERNAL_EXECUTION_SUMMARY_H_
#include <map>
#include <mutex>
#include <string>
#include "ceres/internal/port.h"
#include "ceres/wall_time.h"
namespace ceres {
namespace internal {
struct CallStatistics {
CallStatistics() : time(0.), calls(0) {}
double time;
int calls;
};
// Struct used by various objects to report statistics about their
// execution.
class ExecutionSummary {
public:
void IncrementTimeBy(const std::string& name, const double value) {
std::lock_guard<std::mutex> l(mutex_);
CallStatistics& call_stats = statistics_[name];
call_stats.time += value;
++call_stats.calls;
}
const std::map<std::string, CallStatistics>& statistics() const {
return statistics_;
}
private:
std::mutex mutex_;
std::map<std::string, CallStatistics> statistics_;
};
class ScopedExecutionTimer {
public:
ScopedExecutionTimer(const std::string& name, ExecutionSummary* summary)
: start_time_(WallTimeInSeconds()), name_(name), summary_(summary) {}
~ScopedExecutionTimer() {
summary_->IncrementTimeBy(name_, WallTimeInSeconds() - start_time_);
}
private:
const double start_time_;
const std::string name_;
ExecutionSummary* summary_;
};
} // namespace internal
} // namespace ceres
#endif // CERES_INTERNAL_EXECUTION_SUMMARY_H_
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