| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| |
| #ifndef IMPALA_UTIL_OS_INFO_H |
| #define IMPALA_UTIL_OS_INFO_H |
| |
| #include <time.h> |
| |
| #include <string> |
| |
| #include "common/logging.h" |
| |
| namespace impala { |
| |
| /// Provides information about the OS we're running on. |
| class OsInfo { |
| public: |
| /// Initialize OsInfo. |
| static void Init(); |
| |
| /// Simple name of the OS. |
| /// If Docker is used this is the name of Container OS. |
| static const std::string os_distribution() { |
| DCHECK(initialized_); |
| return os_distribution_; |
| } |
| |
| /// The version of Linux kernel and the version of the compiler used to build it. |
| /// If Docker is used this is the host kernel. |
| static const std::string os_version() { |
| DCHECK(initialized_); |
| return os_version_; |
| } |
| |
| /// Return CLOCK_MONOTONIC if it's fast. Otherwise CLOCK_MONOTONIC_COARSE, which will be |
| /// fast but lower resolution. |
| static clockid_t fast_clock() { |
| DCHECK(initialized_); |
| return fast_clock_; |
| } |
| |
| static std::string DebugString(); |
| |
| private: |
| static bool initialized_; |
| static std::string os_distribution_; |
| static std::string os_version_; |
| static clockid_t fast_clock_; |
| static std::string clock_name_; |
| }; |
| |
| } |
| #endif |