Add Chromium-style TimeDelta, Time and TimeTicks classes, and a new ElapsedTimer class.

test/cctest/test-time.cc

Index: test/cctest/test-time.cc
diff --git a/test/cctest/test-time.cc b/test/cctest/test-time.cc
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+// Copyright 2013 the V8 project authors. 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 <cstdlib>
+
+#include "v8.h"
+
+#include "cctest.h"
+#if V8_OS_WIN
+#include "win32-headers.h"
+#endif
+
+using namespace v8::internal;
+
+
+TEST(TimeDeltaFromAndIn) {
+  CHECK(TimeDelta::FromDays(2) == TimeDelta::FromHours(48));
+  CHECK(TimeDelta::FromHours(3) == TimeDelta::FromMinutes(180));
+  CHECK(TimeDelta::FromMinutes(2) == TimeDelta::FromSeconds(120));
+  CHECK(TimeDelta::FromSeconds(2) == TimeDelta::FromMilliseconds(2000));
+  CHECK(TimeDelta::FromMilliseconds(2) == TimeDelta::FromMicroseconds(2000));
+  CHECK_EQ(static_cast<int>(13), TimeDelta::FromDays(13).InDays());
+  CHECK_EQ(static_cast<int>(13), TimeDelta::FromHours(13).InHours());
+  CHECK_EQ(static_cast<int>(13), TimeDelta::FromMinutes(13).InMinutes());
+  CHECK_EQ(static_cast<int64_t>(13), TimeDelta::FromSeconds(13).InSeconds());
+  CHECK_EQ(13.0, TimeDelta::FromSeconds(13).InSecondsF());
+  CHECK_EQ(static_cast<int64_t>(13),
+           TimeDelta::FromMilliseconds(13).InMilliseconds());
+  CHECK_EQ(13.0, TimeDelta::FromMilliseconds(13).InMillisecondsF());
+  CHECK_EQ(static_cast<int64_t>(13),
+           TimeDelta::FromMicroseconds(13).InMicroseconds());
+}
+
+
+TEST(TimeJsTime) {
+  Time t = Time::FromJsTime(700000.3);
+  CHECK_EQ(700000.3, t.ToJsTime());
+}
+
+
+#if V8_OS_POSIX
+TEST(TimeFromTimeVal) {
+  Time null;
+  CHECK(null.IsNull());
+  CHECK(null == Time::FromTimeval(null.ToTimeval()));
+  Time now = Time::Now();
+  CHECK(now == Time::FromTimeval(now.ToTimeval()));
+  Time now_sys = Time::NowFromSystemTime();
+  CHECK(now_sys == Time::FromTimeval(now_sys.ToTimeval()));
+  Time unix_epoch = Time::UnixEpoch();
+  CHECK(unix_epoch == Time::FromTimeval(unix_epoch.ToTimeval()));
+  Time max = Time::Max();
+  CHECK(max.IsMax());
+  CHECK(max == Time::FromTimeval(max.ToTimeval()));
+}
+#endif
+
+
+#if V8_OS_WIN
+TEST(TimeFromFiletime) {
+  Time null;
+  CHECK(null.IsNull());
+  CHECK(null == Time::FromFiletime(null.ToFiletime()));
+  Time now = Time::Now();
+  CHECK(now == Time::FromFiletime(now.ToFiletime()));
+  Time now_sys = Time::NowFromSystemTime();
+  CHECK(now_sys == Time::FromFiletime(now_sys.ToFiletime()));
+  Time unix_epoch = Time::UnixEpoch();
+  CHECK(unix_epoch == Time::FromFiletime(unix_epoch.ToFiletime()));
+  Time max = Time::Max();
+  CHECK(max.IsMax());
+  CHECK(max == Time::FromFiletime(max.ToFiletime()));
+}
+#endif
+
+
+TEST(TimeTicksIsMonotonic) {
+  TimeTicks previous_normal_ticks;
+  TimeTicks previous_highres_ticks;
+  ElapsedTimer timer;
+  timer.Start();
+  while (!timer.HasExpired(TimeDelta::FromMilliseconds(100))) {
+    TimeTicks normal_ticks = TimeTicks::Now();
+    TimeTicks highres_ticks = TimeTicks::HighResNow();
+    CHECK_GE(normal_ticks, previous_normal_ticks);
+    CHECK_GE((normal_ticks - previous_normal_ticks).InMicroseconds(), 0);
+    CHECK_GE(highres_ticks, previous_highres_ticks);
+    CHECK_GE((highres_ticks - previous_highres_ticks).InMicroseconds(), 0);
+    previous_normal_ticks = normal_ticks;
+    previous_highres_ticks = highres_ticks;
+  }
+}