From 148c1f77492a22ddfc87375c3b2464d5521a3843 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 28 Feb 2007 22:25:41 +0000 Subject: add support for ppoll() and emulate poll() with it when __NR_poll does not exist --- libc/sysdeps/linux/common/ppoll.c | 47 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 libc/sysdeps/linux/common/ppoll.c (limited to 'libc/sysdeps/linux/common/ppoll.c') diff --git a/libc/sysdeps/linux/common/ppoll.c b/libc/sysdeps/linux/common/ppoll.c new file mode 100644 index 000000000..e908ea8a4 --- /dev/null +++ b/libc/sysdeps/linux/common/ppoll.c @@ -0,0 +1,47 @@ +/* Copyright (C) 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 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 +#include + +#ifdef __NR_ppoll + +# define __NR___libc_ppoll __NR_ppoll +static inline +_syscall4(int, __libc_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; + } + + return __libc_ppoll(fds, nfds, timeout, sigmask); +} + +#endif -- cgit v1.2.3