1 | /* Uncancelable versions of cancelable interfaces. Linux/NPTL version. |
2 | Copyright (C) 2003-2016 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ |
19 | |
20 | #ifndef NOT_CANCEL_H |
21 | # define NOT_CANCEL_H |
22 | |
23 | #include <sysdep.h> |
24 | #include <errno.h> |
25 | #include <unistd.h> |
26 | #include <sys/syscall.h> |
27 | |
28 | /* Uncancelable open. */ |
29 | #ifdef __NR_open |
30 | # define open_not_cancel(name, flags, mode) \ |
31 | INLINE_SYSCALL (open, 3, name, flags, mode) |
32 | # define open_not_cancel_2(name, flags) \ |
33 | INLINE_SYSCALL (open, 2, name, flags) |
34 | #else |
35 | # define open_not_cancel(name, flags, mode) \ |
36 | INLINE_SYSCALL (openat, 4, AT_FDCWD, name, flags, mode) |
37 | # define open_not_cancel_2(name, flags) \ |
38 | INLINE_SYSCALL (openat, 3, AT_FDCWD, name, flags) |
39 | #endif |
40 | |
41 | /* Uncancelable read. */ |
42 | #define __read_nocancel(fd, buf, len) \ |
43 | INLINE_SYSCALL (read, 3, fd, buf, len) |
44 | |
45 | /* Uncancelable write. */ |
46 | #define __write_nocancel(fd, buf, len) \ |
47 | INLINE_SYSCALL (write, 3, fd, buf, len) |
48 | |
49 | /* Uncancelable openat. */ |
50 | #define openat_not_cancel(fd, fname, oflag, mode) \ |
51 | INLINE_SYSCALL (openat, 4, fd, fname, oflag, mode) |
52 | #define openat_not_cancel_3(fd, fname, oflag) \ |
53 | INLINE_SYSCALL (openat, 3, fd, fname, oflag) |
54 | #define openat64_not_cancel(fd, fname, oflag, mode) \ |
55 | INLINE_SYSCALL (openat, 4, fd, fname, oflag | O_LARGEFILE, mode) |
56 | #define openat64_not_cancel_3(fd, fname, oflag) \ |
57 | INLINE_SYSCALL (openat, 3, fd, fname, oflag | O_LARGEFILE) |
58 | |
59 | /* Uncancelable close. */ |
60 | #define __close_nocancel(fd) \ |
61 | INLINE_SYSCALL (close, 1, fd) |
62 | #define close_not_cancel(fd) \ |
63 | __close_nocancel (fd) |
64 | #define close_not_cancel_no_status(fd) \ |
65 | (void) ({ INTERNAL_SYSCALL_DECL (err); \ |
66 | INTERNAL_SYSCALL (close, err, 1, (fd)); }) |
67 | |
68 | /* Uncancelable read. */ |
69 | #define read_not_cancel(fd, buf, n) \ |
70 | __read_nocancel (fd, buf, n) |
71 | |
72 | /* Uncancelable write. */ |
73 | #define write_not_cancel(fd, buf, n) \ |
74 | __write_nocancel (fd, buf, n) |
75 | |
76 | /* Uncancelable writev. */ |
77 | #define writev_not_cancel_no_status(fd, iov, n) \ |
78 | (void) ({ INTERNAL_SYSCALL_DECL (err); \ |
79 | INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); }) |
80 | |
81 | /* Uncancelable fcntl. */ |
82 | #define fcntl_not_cancel(fd, cmd, val) \ |
83 | __fcntl_nocancel (fd, cmd, val) |
84 | |
85 | /* Uncancelable waitpid. */ |
86 | #define __waitpid_nocancel(pid, stat_loc, options) \ |
87 | INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL) |
88 | #define waitpid_not_cancel(pid, stat_loc, options) \ |
89 | __waitpid_nocancel(pid, stat_loc, options) |
90 | |
91 | /* Uncancelable pause. */ |
92 | #define pause_not_cancel() \ |
93 | ({ sigset_t set; \ |
94 | int __rc = INLINE_SYSCALL (rt_sigprocmask, 4, SIG_BLOCK, NULL, &set, \ |
95 | _NSIG / 8); \ |
96 | if (__rc == 0) \ |
97 | __rc = INLINE_SYSCALL (rt_sigsuspend, 2, &set, _NSIG / 8); \ |
98 | __rc; \ |
99 | }) |
100 | |
101 | /* Uncancelable nanosleep. */ |
102 | #define nanosleep_not_cancel(requested_time, remaining) \ |
103 | INLINE_SYSCALL (nanosleep, 2, requested_time, remaining) |
104 | |
105 | /* Uncancelable sigsuspend. */ |
106 | #define sigsuspend_not_cancel(set) \ |
107 | INLINE_SYSCALL (rt_sigsuspend, 2, set, _NSIG / 8) |
108 | |
109 | #endif /* NOT_CANCEL_H */ |
110 | |