Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 66 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/posix/sleep.c b/REORG.TODO/sysdeps/posix/sleep.c
new file mode 100644
index 0000000000..b3162baab1
--- /dev/null
+++ b/REORG.TODO/sysdeps/posix/sleep.c
@@ -0,0 +1,66 @@
+/* Sleep for a given number of seconds.  POSIX.1 version.
+   Copyright (C) 1991-2017 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 <time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/param.h>
+
+
+/* Make the process sleep for SECONDS seconds, or until a signal arrives
+   and is not ignored.  The function returns the number of seconds less
+   than SECONDS which it actually slept (zero if it slept the full time).
+   If a signal handler does a `longjmp' or modifies the handling of the
+   SIGALRM signal while inside `sleep' call, the handling of the SIGALRM
+   signal afterwards is undefined.  There is no return value to indicate
+   error, but if `sleep' returns SECONDS, it probably didn't work.  */
+unsigned int
+__sleep (unsigned int seconds)
+{
+  int save_errno = errno;
+
+  const unsigned int max
+    = (unsigned int) (((unsigned long int) (~((time_t) 0))) >> 1);
+  struct timespec ts = { 0, 0 };
+  do
+    {
+      if (sizeof (ts.tv_sec) <= sizeof (seconds))
+        {
+          /* Since SECONDS is unsigned assigning the value to .tv_sec can
+             overflow it.  In this case we have to wait in steps.  */
+          ts.tv_sec += MIN (seconds, max);
+          seconds -= (unsigned int) ts.tv_sec;
+        }
+      else
+        {
+          ts.tv_sec = (time_t) seconds;
+          seconds = 0;
+        }
+
+      if (__nanosleep (&ts, &ts) < 0)
+        /* We were interrupted.
+           Return the number of (whole) seconds we have not yet slept.  */
+        return seconds + ts.tv_sec;
+    }
+  while (seconds > 0);
+
+  __set_errno (save_errno);
+
+  return 0;
+}
+weak_alias (__sleep, sleep)