1 files changed, 51 insertions, 0 deletions
diff --git a/sysdeps/mach/clock_gettime.c b/sysdeps/mach/clock_gettime.c
new file mode 100644
index 0000000000..0f872e5a45
--- /dev/null
+++ b/sysdeps/mach/clock_gettime.c
@@ -0,0 +1,51 @@
+/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <time.h>
+#include <mach.h>
+#include <shlib-compat.h>
+
+/* Get the current time of day, putting it into *TS.
+   Returns 0 on success, -1 on errors.  */
+int
+__clock_gettime (clockid_t clock_id, struct timespec *ts)
+{
+  if (clock_id != CLOCK_REALTIME)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  /* __host_get_time can only fail if passed an invalid host_t.
+     __mach_host_self could theoretically fail (producing an
+     invalid host_t) due to resource exhaustion, but we assume
+     this will never happen.  */
+  time_value_t tv;
+  __host_get_time (__mach_host_self (), &tv);
+  TIME_VALUE_TO_TIMESPEC (&tv, ts);
+  return 0;
+}
+libc_hidden_def (__clock_gettime)
+
+versioned_symbol (libc, __clock_gettime, clock_gettime, GLIBC_2_17);
+/* clock_gettime moved to libc in version 2.17;
+   old binaries may expect the symbol version it had in librt.  */
+#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
+strong_alias (__clock_gettime, __clock_gettime_2);
+compat_symbol (libc, __clock_gettime_2, clock_gettime, GLIBC_2_2);
+#endif