When converting between units of time or data types of different precision,...

base/time.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/time.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "base/third_party/nspr/prtime.h"
 
 #include "base/logging.h"
@@ skipping 23 matching lines @@
 }
 
 double TimeDelta::InMillisecondsF() const {
   return static_cast<double>(delta_) / Time::kMicrosecondsPerMillisecond;
 }
 
 int64 TimeDelta::InMilliseconds() const {
   return delta_ / Time::kMicrosecondsPerMillisecond;
 }
 
+int64 TimeDelta::InMillisecondsRoundedUp() const {
+  return (delta_ + Time::kMicrosecondsPerMillisecond - 1) /
+      Time::kMicrosecondsPerMillisecond;
+}
+
 int64 TimeDelta::InMicroseconds() const {
   return delta_;
 }
 
 // Time -----------------------------------------------------------------------
 
 // static
 Time Time::FromTimeT(time_t tt) {
   if (tt == 0)
     return Time();  // Preserve 0 so we can tell it doesn't exist.
@@ skipping 40 matching lines @@
   PRStatus result = PR_ParseTimeString(ascii_time_string.c_str(), PR_FALSE,
                                        &result_time);
   if (PR_SUCCESS != result)
     return false;
   result_time += kTimeTToMicrosecondsOffset;
   *parsed_time = Time(result_time);
   return true;
 }
 
 }  // namespace base