1 | //===-- Implementation of timespec_get for Linux --------------------------===// |
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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 | |
16 | namespace LIBC_NAMESPACE_DECL { |
17 | |
18 | LLVM_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 |