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glibc/sysdeps/unix/sysv/linux/not-cancel.h
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/* Uncancelable versions of cancelable interfaces. Linux/NPTL version. | |
Copyright (C) 2003-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. | |
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/>. */ | |
#ifndef NOT_CANCEL_H | |
# define NOT_CANCEL_H | |
#include <sysdep.h> | |
#include <errno.h> | |
#include <unistd.h> | |
#include <sys/syscall.h> | |
/* Uncancelable open. */ | |
#ifdef __NR_open | |
# define open_not_cancel(name, flags, mode) \ | |
INLINE_SYSCALL (open, 3, name, flags, mode) | |
# define open_not_cancel_2(name, flags) \ | |
INLINE_SYSCALL (open, 2, name, flags) | |
#else | |
# define open_not_cancel(name, flags, mode) \ | |
INLINE_SYSCALL (openat, 4, AT_FDCWD, name, flags, mode) | |
# define open_not_cancel_2(name, flags) \ | |
INLINE_SYSCALL (openat, 3, AT_FDCWD, name, flags) | |
#endif | |
/* Uncancelable read. */ | |
#define __read_nocancel(fd, buf, len) \ | |
INLINE_SYSCALL (read, 3, fd, buf, len) | |
/* Uncancelable write. */ | |
#define __write_nocancel(fd, buf, len) \ | |
INLINE_SYSCALL (write, 3, fd, buf, len) | |
/* Uncancelable openat. */ | |
#define openat_not_cancel(fd, fname, oflag, mode) \ | |
INLINE_SYSCALL (openat, 4, fd, fname, oflag, mode) | |
#define openat_not_cancel_3(fd, fname, oflag) \ | |
INLINE_SYSCALL (openat, 3, fd, fname, oflag) | |
#define openat64_not_cancel(fd, fname, oflag, mode) \ | |
INLINE_SYSCALL (openat, 4, fd, fname, oflag | O_LARGEFILE, mode) | |
#define openat64_not_cancel_3(fd, fname, oflag) \ | |
INLINE_SYSCALL (openat, 3, fd, fname, oflag | O_LARGEFILE) | |
/* Uncancelable close. */ | |
#define __close_nocancel(fd) \ | |
INLINE_SYSCALL (close, 1, fd) | |
#define close_not_cancel(fd) \ | |
__close_nocancel (fd) | |
#define close_not_cancel_no_status(fd) \ | |
(void) ({ INTERNAL_SYSCALL_DECL (err); \ | |
INTERNAL_SYSCALL (close, err, 1, (fd)); }) | |
/* Uncancelable read. */ | |
#define read_not_cancel(fd, buf, n) \ | |
__read_nocancel (fd, buf, n) | |
/* Uncancelable write. */ | |
#define write_not_cancel(fd, buf, n) \ | |
__write_nocancel (fd, buf, n) | |
/* Uncancelable writev. */ | |
#define writev_not_cancel_no_status(fd, iov, n) \ | |
(void) ({ INTERNAL_SYSCALL_DECL (err); \ | |
INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); }) | |
/* Uncancelable fcntl. */ | |
#define fcntl_not_cancel(fd, cmd, val) \ | |
__fcntl_nocancel (fd, cmd, val) | |
/* Uncancelable waitpid. */ | |
#define __waitpid_nocancel(pid, stat_loc, options) \ | |
INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL) | |
#define waitpid_not_cancel(pid, stat_loc, options) \ | |
__waitpid_nocancel(pid, stat_loc, options) | |
/* Uncancelable pause. */ | |
#define pause_not_cancel() \ | |
({ sigset_t set; \ | |
int __rc = INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, \ | |
_NSIG / 8); \ | |
if (__rc == 0) \ | |
__rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8); \ | |
__rc; \ | |
}) | |
/* Uncancelable nanosleep. */ | |
#define nanosleep_not_cancel(requested_time, remaining) \ | |
INLINE_SYSCALL (nanosleep, 2, requested_time, remaining) | |
/* Uncancelable sigsuspend. */ | |
#define sigsuspend_not_cancel(set) \ | |
INLINE_SYSCALL (rt_sigsuspend, 2, set, _NSIG / 8) | |
#endif /* NOT_CANCEL_H */ |