From b5eede9730eccec155c2374d20d401cd032519fd Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Fri, 18 Nov 2016 13:56:05 -0200 Subject: Consolidate Linux poll implementation This patch consolidates the poll Linux syscall implementation on sysdeps/unix/sysv/linux/poll.c. It basically removes poll from auto-generation list and add a default implementation that either call __NR_poll directly (if the kernel headers defines it) or ppoll adjusting the timeout argument (as the generic implementation). Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32, aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu. * sysdeps/unix/sysv/linux/generic/poll.c: Remove file. * sysdeps/unix/sysv/linux/poll.c: New file. * sysdeps/unix/sysv/linux/syscalls.list: Remove poll from auto-generation list. --- sysdeps/unix/sysv/linux/poll.c | 46 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/poll.c (limited to 'sysdeps/unix/sysv/linux/poll.c') diff --git a/sysdeps/unix/sysv/linux/poll.c b/sysdeps/unix/sysv/linux/poll.c new file mode 100644 index 0000000000..5a781ddf48 --- /dev/null +++ b/sysdeps/unix/sysv/linux/poll.c @@ -0,0 +1,46 @@ +/* Linux poll implementation. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include +#include + +#include +#include + +int +__poll (struct pollfd *fds, nfds_t nfds, int timeout) +{ +#ifdef __NR_poll + return SYSCALL_CANCEL (poll, fds, nfds, timeout); +#else + 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; + } + + return SYSCALL_CANCEL (ppoll, fds, nfds, timeout_ts_p, NULL, 0); +#endif +} +libc_hidden_def (__poll) +weak_alias (__poll, poll) +strong_alias (__poll, __libc_poll) -- cgit 1.4.1