1 files changed, 53 insertions, 0 deletions
diff --git a/sysdeps/nptl/futex-internal.c b/sysdeps/nptl/futex-internal.c
index f418ed2dbb..2e1919f056 100644
--- a/sysdeps/nptl/futex-internal.c
+++ b/sysdeps/nptl/futex-internal.c
@@ -169,3 +169,56 @@ __futex_abstimed_wait64 (unsigned int* futex_word, unsigned int expected,
       futex_fatal_error ();
     }
 }
+
+int
+__futex_clocklock_wait64 (int *futex, int val, clockid_t clockid,
+                          const struct __timespec64 *abstime, int private)
+{
+  struct __timespec64 ts, *tsp = NULL;
+
+  if (abstime != NULL)
+    {
+      /* Reject invalid timeouts.  */
+      if (! valid_nanoseconds (abstime->tv_nsec))
+        return EINVAL;
+
+      /* Get the current time. This can only fail if clockid is not valid.  */
+      if (__glibc_unlikely (__clock_gettime64 (clockid, &ts) != 0))
+        return EINVAL;
+
+      /* Compute relative timeout.  */
+      ts.tv_sec = abstime->tv_sec - ts.tv_sec;
+      ts.tv_nsec = abstime->tv_nsec - ts.tv_nsec;
+      if (ts.tv_nsec < 0)
+        {
+	  ts.tv_nsec += 1000000000;
+	  --ts.tv_sec;
+        }
+
+      if (ts.tv_sec < 0)
+        return ETIMEDOUT;
+
+      tsp = &ts;
+    }
+
+  int err = INTERNAL_SYSCALL_CALL (futex_time64, futex,
+                                   __lll_private_flag (FUTEX_WAIT, private),
+                                   val, tsp);
+#ifndef __ASSUME_TIME64_SYSCALLS
+  if (err == -ENOSYS)
+    {
+      if (tsp != NULL && ! in_time_t_range (tsp->tv_sec))
+        return EOVERFLOW;
+
+      struct timespec ts32;
+      if (tsp != NULL)
+        ts32 = valid_timespec64_to_timespec (*tsp);
+
+      err = INTERNAL_SYSCALL_CALL (futex, futex,
+                                   __lll_private_flag (FUTEX_WAIT, private),
+                                   val, tsp != NULL ? &ts32 : NULL);
+    }
+#endif
+
+  return -err;
+}