| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Author: morlovich@google.com (Maksim Orlovich) |
| |
| // Compile-time only checks of various properties that don't fit anywhere else. |
| // |
| // For now this just makes sure that some things are constants so they can be |
| // used in initializers safely. |
| |
| #include "pagespeed/kernel/base/basictypes.h" |
| #include "pagespeed/kernel/base/timer.h" |
| |
| namespace net_instaweb { |
| namespace { |
| |
| // The COMPILE_ASSERTs and enum MustBeConstants are both testing the same thing. |
| // That Timer::k... are compile-time constants. We include both tests because |
| // there is enough magic to warrant two different approaches. |
| COMPILE_ASSERT(Timer::kSecondMs == 1000, seconds_literal); |
| COMPILE_ASSERT(Timer::kSecondUs == 1000 * 1000, seconds_us_literal); |
| COMPILE_ASSERT(Timer::kSecondNs == 1000 * 1000 * 1000, seconds_ns_literal); |
| COMPILE_ASSERT(Timer::kMinuteMs == 60 * 1000, minutes_literal); |
| COMPILE_ASSERT(Timer::kHourMs == 60 * 60 * 1000, hours_literal); |
| |
| // enumerators can only be initialized to compile-time constants, so this |
| // would not build if any of these weren't compile-time defined. |
| enum MustBeConstants { |
| kSecondMs = Timer::kSecondMs, |
| kSecondUs = Timer::kSecondUs, |
| kSecondNs = Timer::kSecondNs, |
| kMinuteMs = Timer::kMinuteMs, |
| kHourMs = Timer::kHourMs, |
| kDayMs = Timer::kDayMs, |
| kWeekMs = Timer::kWeekMs, |
| kMonthMs = Timer::kMonthMs, |
| kYearMs = Timer::kYearMs |
| }; |
| |
| } // namespace |
| } // namespace net_instaweb |
