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-exception
6//
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, (struct 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_DECL
46

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source code of libc/src/time/linux/timespec_get.cpp