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1//===--- clock conversion linux implementation ------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIBC_SRC___SUPPORT_TIME_LINUX_CLOCK_CONVERSION_H10#define LLVM_LIBC_SRC___SUPPORT_TIME_LINUX_CLOCK_CONVERSION_H11 12#include "src/__support/macros/config.h"13#include "src/__support/time/clock_gettime.h"14#include "src/__support/time/units.h"15 16namespace LIBC_NAMESPACE_DECL {17namespace internal {18 19LIBC_INLINE timespec convert_clock(timespec input, clockid_t from,20 clockid_t to) {21 using namespace time_units;22 timespec from_time;23 timespec to_time;24 timespec output;25 internal::clock_gettime(from, &from_time);26 internal::clock_gettime(to, &to_time);27 output.tv_sec = input.tv_sec - from_time.tv_sec + to_time.tv_sec;28 output.tv_nsec = input.tv_nsec - from_time.tv_nsec + to_time.tv_nsec;29 30 if (output.tv_nsec > 1_s_ns) {31 output.tv_sec++;32 output.tv_nsec -= 1_s_ns;33 } else if (output.tv_nsec < 0) {34 output.tv_sec--;35 output.tv_nsec += 1_s_ns;36 }37 return output;38}39 40} // namespace internal41} // namespace LIBC_NAMESPACE_DECL42 43#endif // LLVM_LIBC_SRC___SUPPORT_TIME_LINUX_CLOCK_CONVERSION_H44