2.5-18.1

sysdeps/unix/sysv/linux/ppoll.c

@@ -0,0 +1,76 @@
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/poll.h>
+#include <kernel-features.h>
+#include <sysdep-cancel.h>
+
+
+#ifdef __NR_ppoll
+static int __generic_ppoll (struct pollfd *fds, nfds_t nfds,
+			    const struct timespec *timeout,
+			    const sigset_t *sigmask);
+
+
+int
+ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout,
+       const sigset_t *sigmask)
+{
+  /* The Linux kernel can in some situations update the timeout value.
+     We do not want that so use a local variable.  */
+  struct timespec tval;
+  if (timeout != NULL)
+    {
+      tval = *timeout;
+      timeout = &tval;
+    }
+
+  int result;
+
+  if (SINGLE_THREAD_P)
+    result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout, sigmask, _NSIG / 8);
+  else
+    {
+      int oldtype = LIBC_CANCEL_ASYNC ();
+
+      result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout, sigmask,
+			       _NSIG / 8);
+
+      LIBC_CANCEL_RESET (oldtype);
+    }
+
+# ifndef __ASSUME_PPOLL
+  if (result == -1 && errno == ENOSYS)
+    result = __generic_ppoll (fds, nfds, timeout, sigmask);
+# endif
+
+  return result;
+}
+
+# ifndef __ASSUME_PPOLL
+#  define ppoll static __generic_ppoll
+# endif
+#endif
+
+#ifndef __ASSUME_PPOLL
+# include <io/ppoll.c>
+#endif