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/*
* Copyright (C) 2005-2017 The Android Open Source Project
*
* 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.
*/
#pragma once
#include <stdint.h>
#include <time.h>
/* struct log_time is a wire-format variant of struct timespec */
#define NS_PER_SEC 1000000000ULL
#define US_PER_SEC 1000000ULL
#define MS_PER_SEC 1000ULL
#define LOG_TIME_SEC(t) ((t)->tv_sec)
/* next power of two after NS_PER_SEC */
#define LOG_TIME_NSEC(t) ((t)->tv_nsec & (UINT32_MAX >> 2))
#ifdef __cplusplus
extern "C" {
struct log_time {
public:
uint32_t tv_sec = 0; /* good to Feb 5 2106 */
uint32_t tv_nsec = 0;
static constexpr timespec EPOCH = {0, 0};
log_time() {}
explicit log_time(const timespec& T)
: tv_sec(static_cast<uint32_t>(T.tv_sec)), tv_nsec(static_cast<uint32_t>(T.tv_nsec)) {}
explicit log_time(uint32_t sec, uint32_t nsec = 0)
: tv_sec(sec), tv_nsec(nsec) {
}
#ifdef __linux__
explicit log_time(clockid_t id) {
timespec T;
clock_gettime(id, &T);
tv_sec = static_cast<uint32_t>(T.tv_sec);
tv_nsec = static_cast<uint32_t>(T.tv_nsec);
}
#endif
/* timespec */
bool operator==(const timespec& T) const {
return (tv_sec == static_cast<uint32_t>(T.tv_sec)) &&
(tv_nsec == static_cast<uint32_t>(T.tv_nsec));
}
bool operator!=(const timespec& T) const {
return !(*this == T);
}
bool operator<(const timespec& T) const {
return (tv_sec < static_cast<uint32_t>(T.tv_sec)) ||
((tv_sec == static_cast<uint32_t>(T.tv_sec)) &&
(tv_nsec < static_cast<uint32_t>(T.tv_nsec)));
}
bool operator>=(const timespec& T) const {
return !(*this < T);
}
bool operator>(const timespec& T) const {
return (tv_sec > static_cast<uint32_t>(T.tv_sec)) ||
((tv_sec == static_cast<uint32_t>(T.tv_sec)) &&
(tv_nsec > static_cast<uint32_t>(T.tv_nsec)));
}
bool operator<=(const timespec& T) const {
return !(*this > T);
}
/* log_time */
bool operator==(const log_time& T) const {
return (tv_sec == T.tv_sec) && (tv_nsec == T.tv_nsec);
}
bool operator!=(const log_time& T) const {
return !(*this == T);
}
bool operator<(const log_time& T) const {
return (tv_sec < T.tv_sec) ||
((tv_sec == T.tv_sec) && (tv_nsec < T.tv_nsec));
}
bool operator>=(const log_time& T) const {
return !(*this < T);
}
bool operator>(const log_time& T) const {
return (tv_sec > T.tv_sec) ||
((tv_sec == T.tv_sec) && (tv_nsec > T.tv_nsec));
}
bool operator<=(const log_time& T) const {
return !(*this > T);
}
log_time operator-=(const log_time& T) {
// No concept of negative time, clamp to EPOCH
if (*this <= T) {
return *this = log_time(EPOCH);
}
if (this->tv_nsec < T.tv_nsec) {
--this->tv_sec;
this->tv_nsec = NS_PER_SEC + this->tv_nsec - T.tv_nsec;
} else {
this->tv_nsec -= T.tv_nsec;
}
this->tv_sec -= T.tv_sec;
return *this;
}
log_time operator-(const log_time& T) const {
log_time local(*this);
return local -= T;
}
log_time operator+=(const log_time& T) {
this->tv_nsec += T.tv_nsec;
if (this->tv_nsec >= NS_PER_SEC) {
this->tv_nsec -= NS_PER_SEC;
++this->tv_sec;
}
this->tv_sec += T.tv_sec;
return *this;
}
log_time operator+(const log_time& T) const {
log_time local(*this);
return local += T;
}
uint64_t nsec() const {
return static_cast<uint64_t>(tv_sec) * NS_PER_SEC + tv_nsec;
}
uint64_t usec() const {
return static_cast<uint64_t>(tv_sec) * US_PER_SEC +
tv_nsec / (NS_PER_SEC / US_PER_SEC);
}
uint64_t msec() const {
return static_cast<uint64_t>(tv_sec) * MS_PER_SEC +
tv_nsec / (NS_PER_SEC / MS_PER_SEC);
}
/* Add %#q for the fraction of a second to the standard library functions */
char* strptime(const char* s, const char* format);
} __attribute__((__packed__));
}
#else /* __cplusplus */
typedef struct log_time {
uint32_t tv_sec;
uint32_t tv_nsec;
} __attribute__((__packed__)) log_time;
#endif /* __cplusplus */
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