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authorJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
committerJakub Jelinek <jakub@redhat.com>2007-07-12 18:26:36 +0000
commit0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (patch)
tree2ea1f8305970753e4a657acb2ccc15ca3eec8e2c /sysdeps/unix/sysv/linux/ppoll.c
parent7d58530341304d403a6626d7f7a1913165fe2f32 (diff)
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2.5-18.1
Diffstat (limited to 'sysdeps/unix/sysv/linux/ppoll.c')
-rw-r--r--sysdeps/unix/sysv/linux/ppoll.c76
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diff --git a/sysdeps/unix/sysv/linux/ppoll.c b/sysdeps/unix/sysv/linux/ppoll.c
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+/* 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