1 files changed, 59 insertions, 0 deletions
diff --git a/o3d/statsreport/common/highres_timer-linux.cc b/o3d/statsreport/common/highres_timer-linux.cc
new file mode 100644
index 0000000..d577fc3
--- /dev/null
+++ b/o3d/statsreport/common/highres_timer-linux.cc
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+
+#include "statsreport/common/highres_timer.h"
+
+const uint64 MICROS_IN_MILLI = 1000L;
+const uint64 MICROS_IN_HALF_MILLI = 500L;
+const uint64 MICROS_IN_HALF_SECOND = 500000L;
+
+uint64 HighresTimer::GetElapsedMs() const {
+  uint64 end_time = GetCurrentTicks();
+
+  // Scale to ms and round to nearest ms - rounding is important
+  // because otherwise the truncation error may accumulate e.g. in sums.
+  //
+  return (static_cast<uint64>(end_time - start_ticks_) +
+          MICROS_IN_HALF_MILLI) /
+      MICROS_IN_MILLI;
+}
+
+uint64 HighresTimer::GetElapsedSec() const {
+  uint64 end_time = GetCurrentTicks();
+
+  // Scale to ms and round to nearest ms - rounding is important
+  // because otherwise the truncation error may accumulate e.g. in sums.
+  //
+  return (static_cast<uint64>(end_time - start_ticks_) +
+          MICROS_IN_HALF_SECOND) /
+      MICROS_IN_SECOND;
+}