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Consolidate Linux poll implementation

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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.
This commit is contained in:
Adhemerval Zanella
2016-11-18 13:56:05 -02:00
parent 14ea415d04
commit b5eede9730
3 changed files with 13 additions and 3 deletions
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46
sysdeps/unix/sysv/linux/poll.c Normal file
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/* 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
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sys/poll.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
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)