| 1 | //===-- Linux implementation of the time 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 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "src/time/time_func.h" |
| 10 | |
| 11 | #include "src/__support/OSUtil/syscall.h" // For internal syscall function. |
| 12 | #include "src/__support/common.h" |
| 13 | #include "src/errno/libc_errno.h" |
| 14 | #include "src/time/linux/clockGetTimeImpl.h" |
| 15 | |
| 16 | #include <sys/syscall.h> // For syscall numbers. |
| 17 | #include <time.h> |
| 18 | |
| 19 | namespace LIBC_NAMESPACE { |
| 20 | |
| 21 | LLVM_LIBC_FUNCTION(time_t, time, (time_t * tp)) { |
| 22 | // TODO: Use the Linux VDSO to fetch the time and avoid the syscall. |
| 23 | struct timespec ts; |
| 24 | auto result = internal::clock_gettimeimpl(CLOCK_REALTIME, ts: &ts); |
| 25 | if (!result.has_value()) { |
| 26 | libc_errno = result.error(); |
| 27 | return -1; |
| 28 | } |
| 29 | |
| 30 | if (tp != nullptr) |
| 31 | *tp = time_t(ts.tv_sec); |
| 32 | return time_t(ts.tv_sec); |
| 33 | } |
| 34 | |
| 35 | } // namespace LIBC_NAMESPACE |
| 36 |