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b168057a | 1 | /* Copyright (C) 2009-2015 Free Software Foundation, Inc. |
e109c612 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
e109c612 UD |
17 | |
18 | #include <errno.h> | |
19 | #include <stddef.h> | |
e054f494 | 20 | #include <stdint.h> |
e109c612 UD |
21 | #include <sys/param.h> |
22 | #if __WORDSIZE == 64 && !defined PWRITEV | |
23 | /* Hide the pwritev64 declaration. */ | |
24 | # define pwritev64 __redirect_pwritev64 | |
25 | #endif | |
26 | #include <sys/uio.h> | |
27 | ||
28 | #include <sysdep-cancel.h> | |
29 | #include <sys/syscall.h> | |
30 | #include <kernel-features.h> | |
31 | ||
24030b0f | 32 | |
e109c612 UD |
33 | #ifndef PWRITEV |
34 | # define PWRITEV pwritev | |
35 | # define PWRITEV_REPLACEMENT __atomic_pwritev_replacement | |
36 | # define PWRITE __pwrite | |
37 | # define OFF_T off_t | |
38 | #endif | |
39 | ||
7f8a28ef UD |
40 | #define LO_HI_LONG(val) \ |
41 | (off_t) val, \ | |
42 | (off_t) ((((uint64_t) (val)) >> (sizeof (long) * 4)) >> (sizeof (long) * 4)) | |
43 | ||
f9fe75e9 | 44 | #ifndef __ASSUME_PWRITEV |
a784e502 | 45 | static ssize_t PWRITEV_REPLACEMENT (int, const struct iovec *, |
e109c612 | 46 | int, OFF_T) internal_function; |
f9fe75e9 | 47 | #endif |
e109c612 UD |
48 | |
49 | ||
50 | ssize_t | |
14bb4e57 | 51 | PWRITEV (int fd, const struct iovec *vector, int count, OFF_T offset) |
e109c612 UD |
52 | { |
53 | #ifdef __NR_pwritev | |
54 | ssize_t result; | |
55 | ||
56 | if (SINGLE_THREAD_P) | |
24030b0f | 57 | result = INLINE_SYSCALL (pwritev, 5, fd, vector, count, |
7f8a28ef | 58 | LO_HI_LONG (offset)); |
e109c612 UD |
59 | else |
60 | { | |
61 | int oldtype = LIBC_CANCEL_ASYNC (); | |
62 | ||
24030b0f | 63 | result = INLINE_SYSCALL (pwritev, 5, fd, vector, count, |
7f8a28ef | 64 | LO_HI_LONG (offset)); |
e109c612 UD |
65 | |
66 | LIBC_CANCEL_RESET (oldtype); | |
67 | } | |
68 | # ifdef __ASSUME_PWRITEV | |
69 | return result; | |
70 | # endif | |
71 | #endif | |
72 | ||
73 | #ifndef __ASSUME_PWRITEV | |
74 | # ifdef __NR_pwritev | |
75 | if (result >= 0 || errno != ENOSYS) | |
76 | return result; | |
77 | # endif | |
78 | ||
79 | return PWRITEV_REPLACEMENT (fd, vector, count, offset); | |
80 | #endif | |
81 | } | |
82 | #if __WORDSIZE == 64 && defined pwritev64 | |
83 | # undef pwritev64 | |
84 | strong_alias (pwritev, pwritev64) | |
85 | #endif | |
86 | ||
87 | #ifndef __ASSUME_PWRITEV | |
88 | # undef PWRITEV | |
89 | # define PWRITEV static internal_function PWRITEV_REPLACEMENT | |
90 | # include <sysdeps/posix/pwritev.c> | |
91 | #endif |