// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_UTIL_MISC_TIME_H_
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#define CRASHPAD_UTIL_MISC_TIME_H_
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#include <stdint.h>
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#include <sys/time.h>
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#include <time.h>
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#include "build/build_config.h"
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#if defined(OS_WIN)
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#include <windows.h>
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#endif
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namespace crashpad {
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constexpr uint64_t kNanosecondsPerSecond = static_cast<uint64_t>(1E9);
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//! \brief Add `timespec` \a ts1 and \a ts2 and return the result in \a result.
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void AddTimespec(const timespec& ts1, const timespec& ts2, timespec* result);
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//! \brief Subtract `timespec` \a ts2 from \a ts1 and return the result in \a
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//! result.
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void SubtractTimespec(const timespec& ts1,
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const timespec& ts2,
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timespec* result);
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//! \brief Convert the timespec \a ts to a timeval \a tv.
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//! \return `true` if the assignment is possible without truncation.
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bool TimespecToTimeval(const timespec& ts, timeval* tv);
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//! \brief Convert the timeval \a tv to a timespec \a ts.
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void TimevalToTimespec(const timeval& tv, timespec* ts);
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#if defined(OS_WIN) || DOXYGEN
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//! \brief Convert a `timespec` to a Windows `FILETIME`, converting from POSIX
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//! epoch to Windows epoch.
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FILETIME TimespecToFiletimeEpoch(const timespec& ts);
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//! \brief Convert a Windows `FILETIME` to `timespec`, converting from Windows
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//! epoch to POSIX epoch.
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timespec FiletimeToTimespecEpoch(const FILETIME& filetime);
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//! \brief Convert Windows `FILETIME` to `timeval`, converting from Windows
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//! epoch to POSIX epoch.
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timeval FiletimeToTimevalEpoch(const FILETIME& filetime);
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//! \brief Convert Windows `FILETIME` to `timeval`, treating the values as
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//! an interval of elapsed time.
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timeval FiletimeToTimevalInterval(const FILETIME& filetime);
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//! \brief Similar to POSIX `gettimeofday()`, gets the current system time in
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//! UTC.
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void GetTimeOfDay(timeval* tv);
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#endif // OS_WIN
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#if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_ANDROID) || DOXYGEN
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//! \brief Get the kernel boot time. Subsequent calls to this function may
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//! return different results due to the system clock being changed or
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//! imprecision in measuring the boot time.
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//! \return `true` on success. Otherwise, `false` with a message logged.
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bool GetBootTime(timespec* ts);
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#endif // OS_LINUX || OS_CHROMEOS || OS_ANDROID || DOXYGEN
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_MISC_TIME_H_
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