[libc-commits] [libc] [libc] Implement `timespec_get` (PR #116102)

[Petr Hosek via libc-commits]

================
@@ -0,0 +1,31 @@
+//===-- Implementation of timespec_get for Linux --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/time/timespec_get.h"
+#include "hdr/time_macros.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+#include "src/__support/time/linux/clock_gettime.h"
+#include "src/errno/libc_errno.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(int, timespec_get, (struct timespec * ts, int base)) {
+  if (base != TIME_UTC) {
----------------
petrhosek wrote:

I wasn't aware of these, looks they were added in the latest standard (and aren't even mentioned on https://en.cppreference.com/w/c/chrono/timespec_get). I implemented all of them for Linux since it was straightforward.

https://github.com/llvm/llvm-project/pull/116102