125 lines
4.7 KiB
C++
Executable File
125 lines
4.7 KiB
C++
Executable File
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#ifndef DORIS_BE_UTIL_TIME_H
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#define DORIS_BE_UTIL_TIME_H
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#include <stdint.h>
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#include <time.h>
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#include <string>
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#define NANOS_PER_SEC 1000000000ll
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#define NANOS_PER_MICRO 1000ll
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#define MICROS_PER_SEC 1000000ll
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#define MICROS_PER_MILLI 1000ll
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#define MILLIS_PER_SEC 1000ll
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/// Utilities for collecting timings.
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namespace doris {
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/// Returns a value representing a point in time that is unaffected by daylight savings or
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/// manual adjustments to the system clock. This should not be assumed to be a Unix
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/// time. Typically the value corresponds to elapsed time since the system booted. See
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/// UnixMillis() below if you need to send a time to a different host.
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inline int64_t MonotonicNanos() {
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timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * NANOS_PER_SEC + ts.tv_nsec;
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}
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inline int64_t GetMonoTimeMicros() {
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timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * MICROS_PER_SEC + ts.tv_nsec / NANOS_PER_MICRO;
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}
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inline int64_t MonotonicMicros() { // 63 bits ~= 5K years uptime
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return GetMonoTimeMicros();
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}
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inline int64_t MonotonicMillis() {
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return GetMonoTimeMicros() / MICROS_PER_MILLI;
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}
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inline int64_t MonotonicSeconds() {
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return GetMonoTimeMicros() / MICROS_PER_SEC;
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}
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// Returns the time since the Epoch measured in microseconds.
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inline int64_t GetCurrentTimeMicros() {
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timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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return ts.tv_sec * MICROS_PER_SEC + ts.tv_nsec / NANOS_PER_MICRO;
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}
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/// Returns the number of milliseconds that have passed since the Unix epoch. This is
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/// affected by manual changes to the system clock but is more suitable for use across
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/// a cluster. For more accurate timings on the local host use the monotonic functions
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/// above.
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inline int64_t UnixMillis() {
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return GetCurrentTimeMicros() / MICROS_PER_MILLI;
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}
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/// Returns the number of microseconds that have passed since the Unix epoch. This is
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/// affected by manual changes to the system clock but is more suitable for use across
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/// a cluster. For more accurate timings on the local host use the monotonic functions
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/// above.
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inline int64_t UnixMicros() {
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return GetCurrentTimeMicros();
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}
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/// Sleeps the current thread for at least duration_ms milliseconds.
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void SleepForMs(const int64_t duration_ms);
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// An enum class to use as precision argument for the ToString*() functions below
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enum TimePrecision {
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Second,
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Millisecond,
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Microsecond,
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Nanosecond
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};
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/// Converts the input Unix time, 's', specified in seconds since the Unix epoch, to a
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/// date-time string in the local time zone. The precision in the output date-time string
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/// is specified by the second argument, 'p'. The returned string is of the format
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/// yyyy-MM-dd HH:mm:SS[.ms[us[ns]]. It's worth noting that if the precision specified
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/// by 'p' is higher than that of the input timestamp, the part corresponding to
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/// 'p' in the fractional second part of the output will just be zero-padded.
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std::string ToStringFromUnix(int64_t s, TimePrecision p = TimePrecision::Second);
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/// Converts input seconds-since-epoch to date-time string in UTC time zone.
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std::string ToUtcStringFromUnix(int64_t s, TimePrecision p = TimePrecision::Second);
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/// Converts input milliseconds-since-epoch to date-time string in local time zone.
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std::string ToStringFromUnixMillis(int64_t ms,
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TimePrecision p = TimePrecision::Millisecond);
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/// Converts input milliseconds-since-epoch to date-time string in UTC time zone.
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std::string ToUtcStringFromUnixMillis(int64_t ms,
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TimePrecision p = TimePrecision::Millisecond);
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/// Converts input microseconds-since-epoch to date-time string in local time zone.
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std::string ToStringFromUnixMicros(int64_t us,
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TimePrecision p = TimePrecision::Microsecond);
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/// Converts input microseconds-since-epoch to date-time string in UTC time zone.
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std::string ToUtcStringFromUnixMicros(int64_t us,
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TimePrecision p = TimePrecision::Microsecond);
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} // namespace impala
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#endif
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