1 files changed, 101 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/clock_nanosleep.c b/REORG.TODO/sysdeps/unix/clock_nanosleep.c
new file mode 100644
index 0000000000..8f4d348810
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/clock_nanosleep.c
@@ -0,0 +1,101 @@
+/* High-resolution sleep with the specified clock.
+   Copyright (C) 2000-2017 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <errno.h>
+#include <time.h>
+#include <hp-timing.h>
+#include <sysdep-cancel.h>
+
+#if HP_TIMING_AVAIL
+# define CPUCLOCK_P(clock) \
+  ((clock) == CLOCK_PROCESS_CPUTIME_ID					      \
+   || ((clock) & ((1 << CLOCK_IDFIELD_SIZE) - 1)) == CLOCK_THREAD_CPUTIME_ID)
+#else
+# define CPUCLOCK_P(clock) 0
+#endif
+
+#ifndef INVALID_CLOCK_P
+# define INVALID_CLOCK_P(cl) \
+  ((cl) < CLOCK_REALTIME || (cl) > CLOCK_THREAD_CPUTIME_ID)
+#endif
+
+
+/* This implementation assumes that these is only a `nanosleep' system
+   call.  So we have to remap all other activities.  */
+int
+__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
+		   struct timespec *rem)
+{
+  struct timespec now;
+
+  if (__builtin_expect (req->tv_nsec, 0) < 0
+      || __builtin_expect (req->tv_nsec, 0) >= 1000000000)
+    return EINVAL;
+
+  if (clock_id == CLOCK_THREAD_CPUTIME_ID)
+    return EINVAL;		/* POSIX specifies EINVAL for this case.  */
+
+#ifdef SYSDEP_NANOSLEEP
+  SYSDEP_NANOSLEEP;
+#endif
+
+  if (CPUCLOCK_P (clock_id))
+    return ENOTSUP;
+
+  if (INVALID_CLOCK_P (clock_id))
+    return EINVAL;
+
+  /* If we got an absolute time, remap it.  */
+  if (flags == TIMER_ABSTIME)
+    {
+      long int nsec;
+      long int sec;
+
+      /* Make sure we use safe data types.  */
+      assert (sizeof (sec) >= sizeof (now.tv_sec));
+
+      /* Get the current time for this clock.  */
+      if (__builtin_expect (clock_gettime (clock_id, &now), 0) != 0)
+	return errno;
+
+      /* Compute the difference.  */
+      nsec = req->tv_nsec - now.tv_nsec;
+      sec = req->tv_sec - now.tv_sec - (nsec < 0);
+      if (sec < 0)
+	/* The time has already elapsed.  */
+	return 0;
+
+      now.tv_sec = sec;
+      now.tv_nsec = nsec + (nsec < 0 ? 1000000000 : 0);
+
+      /* From now on this is our time.  */
+      req = &now;
+
+      /* Make sure we are not modifying the struct pointed to by REM.  */
+      rem = NULL;
+    }
+  else if (__builtin_expect (flags, 0) != 0)
+    return EINVAL;
+  else if (clock_id != CLOCK_REALTIME)
+    /* Not supported.  */
+    return ENOTSUP;
+
+  return __builtin_expect (nanosleep (req, rem), 0) ? errno : 0;
+}
+weak_alias (__clock_nanosleep, clock_nanosleep)