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d4697bc9 | 1 | /* Copyright (C) 2011-2014 Free Software Foundation, Inc. |
a63c7fa1 CM |
2 | This file is part of the GNU C Library. |
3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
4 | Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
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 | |
ab84e3ff PE |
17 | License along with the GNU C Library. If not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
a63c7fa1 CM |
19 | |
20 | #include <assert.h> | |
21 | #include <errno.h> | |
22 | #include <endian.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/uio.h> | |
25 | ||
26 | #include <sysdep-cancel.h> | |
27 | #include <sys/syscall.h> | |
28 | ||
29 | #include <kernel-features.h> | |
30 | ||
31 | static ssize_t | |
32 | do_preadv (int fd, const struct iovec *vector, int count, off_t offset) | |
33 | { | |
34 | assert (sizeof (offset) == 4); | |
35 | return INLINE_SYSCALL (preadv, __ALIGNMENT_COUNT (5, 6), fd, | |
36 | vector, count, __ALIGNMENT_ARG | |
37 | __LONG_LONG_PAIR (offset >> 31, offset)); | |
38 | } | |
39 | ||
40 | ssize_t | |
41 | __libc_preadv (int fd, const struct iovec *vector, int count, off_t offset) | |
42 | { | |
43 | if (SINGLE_THREAD_P) | |
44 | return do_preadv (fd, vector, count, offset); | |
45 | ||
46 | int oldtype = LIBC_CANCEL_ASYNC (); | |
47 | ||
48 | ssize_t result = do_preadv (fd, vector, count, offset); | |
49 | ||
50 | LIBC_CANCEL_RESET (oldtype); | |
51 | ||
52 | return result; | |
53 | } | |
54 | strong_alias (__libc_preadv, __preadv) | |
55 | weak_alias (__libc_preadv, preadv) |