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110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/* Uncancelable versions of cancelable interfaces. Linux/NPTL version.
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Copyright (C) 2003-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef NOT_CANCEL_H
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# define NOT_CANCEL_H
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#include <sysdep.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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/* Uncancelable open. */
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#ifdef __NR_open
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# define open_not_cancel(name, flags, mode) \
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INLINE_SYSCALL (open, 3, name, flags, mode)
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# define open_not_cancel_2(name, flags) \
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INLINE_SYSCALL (open, 2, name, flags)
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#else
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# define open_not_cancel(name, flags, mode) \
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INLINE_SYSCALL (openat, 4, AT_FDCWD, name, flags, mode)
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# define open_not_cancel_2(name, flags) \
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INLINE_SYSCALL (openat, 3, AT_FDCWD, name, flags)
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#endif
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/* Uncancelable read. */
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#define __read_nocancel(fd, buf, len) \
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INLINE_SYSCALL (read, 3, fd, buf, len)
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/* Uncancelable write. */
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#define __write_nocancel(fd, buf, len) \
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INLINE_SYSCALL (write, 3, fd, buf, len)
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/* Uncancelable openat. */
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#define openat_not_cancel(fd, fname, oflag, mode) \
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INLINE_SYSCALL (openat, 4, fd, fname, oflag, mode)
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#define openat_not_cancel_3(fd, fname, oflag) \
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INLINE_SYSCALL (openat, 3, fd, fname, oflag)
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#define openat64_not_cancel(fd, fname, oflag, mode) \
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INLINE_SYSCALL (openat, 4, fd, fname, oflag | O_LARGEFILE, mode)
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#define openat64_not_cancel_3(fd, fname, oflag) \
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INLINE_SYSCALL (openat, 3, fd, fname, oflag | O_LARGEFILE)
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/* Uncancelable close. */
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#define __close_nocancel(fd) \
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INLINE_SYSCALL (close, 1, fd)
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#define close_not_cancel(fd) \
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__close_nocancel (fd)
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#define close_not_cancel_no_status(fd) \
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(void) ({ INTERNAL_SYSCALL_DECL (err); \
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INTERNAL_SYSCALL (close, err, 1, (fd)); })
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/* Uncancelable read. */
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#define read_not_cancel(fd, buf, n) \
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__read_nocancel (fd, buf, n)
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/* Uncancelable write. */
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#define write_not_cancel(fd, buf, n) \
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__write_nocancel (fd, buf, n)
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/* Uncancelable writev. */
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#define writev_not_cancel_no_status(fd, iov, n) \
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(void) ({ INTERNAL_SYSCALL_DECL (err); \
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INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); })
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/* Uncancelable fcntl. */
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#define fcntl_not_cancel(fd, cmd, val) \
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__fcntl_nocancel (fd, cmd, val)
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/* Uncancelable waitpid. */
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#define __waitpid_nocancel(pid, stat_loc, options) \
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INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL)
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#define waitpid_not_cancel(pid, stat_loc, options) \
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__waitpid_nocancel(pid, stat_loc, options)
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/* Uncancelable pause. */
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#define pause_not_cancel() \
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({ sigset_t set; \
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int __rc = INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, \
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_NSIG / 8); \
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if (__rc == 0) \
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__rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8); \
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__rc; \
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})
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/* Uncancelable nanosleep. */
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#define nanosleep_not_cancel(requested_time, remaining) \
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INLINE_SYSCALL (nanosleep, 2, requested_time, remaining)
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/* Uncancelable sigsuspend. */
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#define sigsuspend_not_cancel(set) \
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INLINE_SYSCALL (rt_sigsuspend, 2, set, _NSIG / 8)
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#endif /* NOT_CANCEL_H */
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