projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2011-2015 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 <errno.h> | |
| 21 | #include <endian.h> | |
| 22 | #include <unistd.h> | |
| 23 | ||
| 24 | #include <sysdep-cancel.h> | |
| 25 | #include <sys/syscall.h> | |
| 26 | ||
| a63c7fa1 CM |
27 | static ssize_t |
| 28 | do_pread64 (int fd, void *buf, size_t count, off64_t offset) | |
| 29 | { | |
| 30 | return INLINE_SYSCALL (pread64, __ALIGNMENT_COUNT (5, 6), fd, | |
| 31 | buf, count, __ALIGNMENT_ARG | |
| 32 | __LONG_LONG_PAIR ((off_t) (offset >> 32), | |
| 33 | (off_t) (offset & 0xffffffff))); | |
| 34 | } | |
| 35 | ||
| 36 | ||
| 37 | ssize_t | |
| 38 | __libc_pread64 (fd, buf, count, offset) | |
| 39 | int fd; | |
| 40 | void *buf; | |
| 41 | size_t count; | |
| 42 | off64_t offset; | |
| 43 | { | |
| 44 | if (SINGLE_THREAD_P) | |
| 45 | return do_pread64 (fd, buf, count, offset); | |
| 46 | ||
| 47 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 48 | ||
| 49 | ssize_t result = do_pread64 (fd, buf, count, offset); | |
| 50 | ||
| 51 | LIBC_CANCEL_RESET (oldtype); | |
| 52 | ||
| 53 | return result; | |
| 54 | } | |
| 55 | ||
| 56 | weak_alias (__libc_pread64, __pread64) weak_alias (__libc_pread64, pread64) |