89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
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// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2015 Google Inc. All rights reserved.
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// http://ceres-solver.org/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: strandmark@google.com (Petter Strandmark)
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#ifndef CERES_INTERNAL_WALL_TIME_H_
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#define CERES_INTERNAL_WALL_TIME_H_
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#include <map>
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#include <string>
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#include "ceres/internal/port.h"
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#include "ceres/stringprintf.h"
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#include "glog/logging.h"
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namespace ceres {
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namespace internal {
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// Returns time, in seconds, from some arbitrary starting point. If
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// OpenMP is available then the high precision openmp_get_wtime()
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// function is used. Otherwise on unixes, gettimeofday is used. The
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// granularity is in seconds on windows systems.
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double WallTimeInSeconds();
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// Log a series of events, recording for each event the time elapsed
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// since the last event and since the creation of the object.
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//
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// The information is output to VLOG(3) upon destruction. A
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// name::Total event is added as the final event right before
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// destruction.
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//
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// Example usage:
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//
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// void Foo() {
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// EventLogger event_logger("Foo");
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// Bar1();
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// event_logger.AddEvent("Bar1")
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// Bar2();
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// event_logger.AddEvent("Bar2")
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// Bar3();
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// }
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//
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// Will produce output that looks like
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//
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// Foo
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// Bar1: time1 time1
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// Bar2: time2 time1 + time2;
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// Total: time3 time1 + time2 + time3;
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class EventLogger {
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public:
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explicit EventLogger(const std::string& logger_name);
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~EventLogger();
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void AddEvent(const std::string& event_name);
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private:
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const double start_time_;
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double last_event_time_;
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std::string events_;
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};
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} // namespace internal
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} // namespace ceres
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#endif // CERES_INTERNAL_WALL_TIME_H_
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