1 files changed, 96 insertions, 0 deletions
diff --git a/extern/ceres/internal/ceres/wall_time.cc b/extern/ceres/internal/ceres/wall_time.cc
new file mode 100644
index 00000000000..c353973cc3e
--- /dev/null
+++ b/extern/ceres/internal/ceres/wall_time.cc
@@ -0,0 +1,96 @@
+// 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: strandmark@google.com (Petter Strandmark)
+
+#include "ceres/wall_time.h"
+
+#ifdef CERES_USE_OPENMP
+#include <omp.h>
+#else
+#include <ctime>
+#endif
+
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <sys/time.h>
+#endif
+
+namespace ceres {
+namespace internal {
+
+double WallTimeInSeconds() {
+#ifdef CERES_USE_OPENMP
+  return omp_get_wtime();
+#else
+#ifdef _WIN32
+  return static_cast<double>(std::time(NULL));
+#else
+  timeval time_val;
+  gettimeofday(&time_val, NULL);
+  return (time_val.tv_sec + time_val.tv_usec * 1e-6);
+#endif
+#endif
+}
+
+EventLogger::EventLogger(const std::string& logger_name)
+    : start_time_(WallTimeInSeconds()),
+      last_event_time_(start_time_),
+      events_("") {
+  StringAppendF(&events_,
+                "\n%s\n                                   Delta   Cumulative\n",
+                logger_name.c_str());
+}
+
+EventLogger::~EventLogger() {
+  if (VLOG_IS_ON(3)) {
+    AddEvent("Total");
+    VLOG(2) << "\n" << events_ << "\n";
+  }
+}
+
+void EventLogger::AddEvent(const std::string& event_name) {
+  if (!VLOG_IS_ON(3)) {
+    return;
+  }
+
+  const double current_time = WallTimeInSeconds();
+  const double relative_time_delta = current_time - last_event_time_;
+  const double absolute_time_delta = current_time - start_time_;
+  last_event_time_ = current_time;
+
+  StringAppendF(&events_,
+                "  %30s : %10.5f   %10.5f\n",
+                event_name.c_str(),
+                relative_time_delta,
+                absolute_time_delta);
+}
+
+}  // namespace internal
+}  // namespace ceres