1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* Uncancelable versions of cancelable interfaces. Linux/NPTL version.
Copyright (C) 2003-2017 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 <fcntl.h>
#include <sysdep.h>
#include <errno.h>
#include <unistd.h>
#include <sys/syscall.h>
/* Non cancellable open syscall. */
__typeof (open) __open_nocancel;
libc_hidden_proto (__open_nocancel)
/* Non cancellable open syscall (LFS version). */
__typeof (open64) __open64_nocancel;
libc_hidden_proto (__open64_nocancel)
/* Non cancellable read syscall. */
__typeof (__read) __read_nocancel;
libc_hidden_proto (__read_nocancel)
/* Uncancelable write. */
__typeof (__write) __write_nocancel;
libc_hidden_proto (__write_nocancel)
/* 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 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 */
|
