Merge glibc-ports into ports/ directory.glibc-2.16.90glibc-2.16-ports-merge

1 files changed, 63 insertions, 0 deletions

diff --git a/ports/sysdeps/unix/sysv/linux/generic/pause.c b/ports/sysdeps/unix/sysv/linux/generic/pause.c
new file mode 100644
index 0000000000..805b5d4bce
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/generic/pause.c
@@ -0,0 +1,63 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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 <signal.h>
+#include <unistd.h>
+#include <sysdep-cancel.h>
+
+/* Suspend the process until a signal arrives.
+   This always returns -1 and sets errno to EINTR.  */
+
+static int
+__syscall_pause (void)
+{
+  sigset_t set;
+
+  int rc =
+    INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, _NSIG / 8);
+  if (rc == 0)
+    rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8);
+
+  return rc;
+}
+
+int
+__libc_pause (void)
+{
+  if (SINGLE_THREAD_P)
+    return __syscall_pause ();
+
+  int oldtype = LIBC_CANCEL_ASYNC ();
+
+  int result = __syscall_pause ();
+
+  LIBC_CANCEL_RESET (oldtype);
+
+  return result;
+}
+weak_alias (__libc_pause, pause)
+
+#ifndef NO_CANCELLATION
+# include <not-cancel.h>
+
+int
+__pause_nocancel (void)
+{
+  return __syscall_pause ();
+}
+#endif