46 lines · cpp
1//===-- Implementation of timespec_get for Linux --------------------------===//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#include "src/time/timespec_get.h"10#include "hdr/time_macros.h"11#include "src/__support/common.h"12#include "src/__support/libc_errno.h"13#include "src/__support/macros/config.h"14#include "src/__support/time/clock_gettime.h"15 16namespace LIBC_NAMESPACE_DECL {17 18LLVM_LIBC_FUNCTION(int, timespec_get, (timespec * ts, int base)) {19 clockid_t clockid;20 switch (base) {21 case TIME_UTC:22 clockid = CLOCK_REALTIME;23 break;24 case TIME_MONOTONIC:25 clockid = CLOCK_MONOTONIC;26 break;27 case TIME_ACTIVE:28 clockid = CLOCK_PROCESS_CPUTIME_ID;29 break;30 case TIME_THREAD_ACTIVE:31 clockid = CLOCK_THREAD_CPUTIME_ID;32 break;33 default:34 return 0;35 }36 37 auto result = internal::clock_gettime(clockid, ts);38 if (!result.has_value()) {39 libc_errno = result.error();40 return 0;41 }42 return base;43}44 45} // namespace LIBC_NAMESPACE_DECL46