diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/generic/poll.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/generic/poll.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/poll.c b/sysdeps/unix/sysv/linux/generic/poll.c new file mode 100644 index 0000000000..62342779c4 --- /dev/null +++ b/sysdeps/unix/sysv/linux/generic/poll.c @@ -0,0 +1,53 @@ +/* Copyright (C) 2011-2014 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 <errno.h> +#include <sys/poll.h> + +#include <sysdep-cancel.h> +#include <sys/syscall.h> + +#include <kernel-features.h> + +int +__poll (struct pollfd *fds, nfds_t nfds, int timeout) +{ + struct timespec timeout_ts; + struct timespec *timeout_ts_p = NULL; + + if (timeout >= 0) + { + timeout_ts.tv_sec = timeout / 1000; + timeout_ts.tv_nsec = (timeout % 1000) * 1000000; + timeout_ts_p = &timeout_ts; + } + + if (SINGLE_THREAD_P) + return INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout_ts_p, NULL, 0); + + int oldtype = LIBC_CANCEL_ASYNC (); + + int result = INLINE_SYSCALL (ppoll, 5, fds, nfds, timeout_ts_p, NULL, 0); + + LIBC_CANCEL_RESET (oldtype); + + return result; +} +libc_hidden_def (__poll) +weak_alias (__poll, poll) +strong_alias (__poll, __libc_poll) |