[llvm] Improve llvm.objectsize computation by computing GEP, alloca a… (#117849)
[llvm-project.git] / libc / src / time / linux / clock_gettime.cpp
blob743c644d65d024c156f56e34cecbbb12882ba4dd
1 //===---------- Linux implementation of the POSIX clock_gettime function --===//
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 //===----------------------------------------------------------------------===//
9 #include "src/time/clock_gettime.h"
10 #include "src/__support/common.h"
11 #include "src/__support/macros/config.h"
12 #include "src/__support/time/clock_gettime.h"
13 #include "src/errno/libc_errno.h"
15 namespace LIBC_NAMESPACE_DECL {
17 // TODO(michaelrj): Move this into time/linux with the other syscalls.
18 LLVM_LIBC_FUNCTION(int, clock_gettime,
19 (clockid_t clockid, struct timespec *ts)) {
20 auto result = internal::clock_gettime(clockid, ts);
22 // A negative return value indicates an error with the magnitude of the
23 // value being the error code.
24 if (!result.has_value()) {
25 libc_errno = result.error();
26 return -1;
28 return 0;
31 } // namespace LIBC_NAMESPACE_DECL