projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2003-2019 Free Software Foundation, Inc. |
| 5cd09cd6 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/>. */ | |
| 5cd09cd6 UD |
17 | |
| 18 | #include <errno.h> | |
| 19 | #include <fcntl.h> | |
| 20 | #include <sysdep.h> | |
| 21 | ||
| 22 | /* Advice the system about the expected behaviour of the application with | |
| 23 | respect to the file associated with FD. */ | |
| 24 | ||
| 96b7fe42 AZ |
25 | #ifndef __OFF_T_MATCHES_OFF64_T |
| 26 | ||
| 841a67a0 AZ |
27 | /* Default implementation will use __NR_fadvise64 with expected argument |
| 28 | positions (for instance i386 and powerpc32 that uses __ALIGNMENT_ARG). | |
| 96b7fe42 | 29 | |
| 841a67a0 AZ |
30 | Second option will be used by arm which define __NR_arm_fadvise64_64 |
| 31 | (redefined to __NR_fadvise64_64 in kernel-features.h) that behaves as | |
| 32 | __NR_fadvise64_64 (without the aligment argument required for the ABI). | |
| 33 | ||
| a3fb6b6b JM |
34 | Third option will be used by mips o32. Mips will use a 7 argument |
| 35 | syscall with __NR_fadvise64. | |
| 96b7fe42 AZ |
36 | |
| 37 | s390 implements fadvice64_64 using a specific struct with arguments | |
| 38 | packed inside. This is the only implementation handled in arch-specific | |
| 39 | code. */ | |
| 40 | ||
| 5cd09cd6 | 41 | int |
| bfef9264 | 42 | posix_fadvise (int fd, off_t offset, off_t len, int advise) |
| 5cd09cd6 | 43 | { |
| 137ffcdc | 44 | INTERNAL_SYSCALL_DECL (err); |
| 841a67a0 | 45 | # if defined (__NR_fadvise64) && !defined (__ASSUME_FADVISE64_AS_64_64) |
| 96b7fe42 AZ |
46 | int ret = INTERNAL_SYSCALL_CALL (fadvise64, err, fd, |
| 47 | __ALIGNMENT_ARG SYSCALL_LL (offset), | |
| 48 | len, advise); | |
| e933a943 | 49 | # else |
| 96b7fe42 AZ |
50 | # ifdef __ASSUME_FADVISE64_64_6ARG |
| 51 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise, | |
| 841a67a0 | 52 | SYSCALL_LL (offset), SYSCALL_LL (len)); |
| 96b7fe42 AZ |
53 | # else |
| 54 | ||
| 841a67a0 AZ |
55 | # ifndef __NR_fadvise64_64 |
| 56 | # define __NR_fadvise64_64 __NR_fadvise64 | |
| 96b7fe42 AZ |
57 | # endif |
| 58 | ||
| 59 | int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, | |
| 60 | __ALIGNMENT_ARG SYSCALL_LL (offset), | |
| 61 | SYSCALL_LL (len), advise); | |
| 62 | # endif | |
| e933a943 | 63 | # endif |
| 137ffcdc UD |
64 | if (INTERNAL_SYSCALL_ERROR_P (ret, err)) |
| 65 | return INTERNAL_SYSCALL_ERRNO (ret, err); | |
| 66 | return 0; | |
| 5cd09cd6 | 67 | } |
| 96b7fe42 | 68 | #endif /* __OFF_T_MATCHES_OFF64_T */ |