diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise64.c')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise64.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise64.c b/REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise64.c new file mode 100644 index 0000000000..aaee60add7 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/posix_fadvise64.c @@ -0,0 +1,85 @@ +/* Copyright (C) 2003-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <fcntl.h> +#include <shlib-compat.h> + +int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise); + +/* Both arm and powerpc implements fadvise64_64 with last 'advise' argument + just after 'fd' to avoid the requirement of implementing 7-arg syscalls. + ARM also defines __NR_fadvise64_64 as __NR_arm_fadvise64_64. + + tile requires __ASSUME_ALIGNED_REGISTER_PAIRS but implements the 32-bit + fadvise64_64 without the padding 0 after fd. + + s390 implements fadvice64_64 using a specific struct with arguments + packed inside. This is the only implementation handled in arch-specific + code. */ + +#ifdef __ASSUME_FADVISE64_64_NO_ALIGN +# undef __ALIGNMENT_ARG +# define __ALIGNMENT_ARG +#endif + +#ifndef __NR_fadvise64_64 +# define __NR_fadvise64_64 __NR_fadvise64 +#endif + +/* Advice the system about the expected behaviour of the application with + respect to the file associated with FD. */ + +int +__posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise) +{ + INTERNAL_SYSCALL_DECL (err); +#ifdef __ASSUME_FADVISE64_64_6ARG + int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, advise, + SYSCALL_LL64 (offset), SYSCALL_LL64 (len)); +#else + int ret = INTERNAL_SYSCALL_CALL (fadvise64_64, err, fd, + __ALIGNMENT_ARG SYSCALL_LL64 (offset), + SYSCALL_LL64 (len), advise); +#endif + if (!INTERNAL_SYSCALL_ERROR_P (ret, err)) + return 0; + return INTERNAL_SYSCALL_ERRNO (ret, err); +} + +/* The type of the len argument was changed from size_t to off_t in + POSIX.1-2003 TC1. */ +#ifndef __OFF_T_MATCHES_OFF64_T +# if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3) +int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise); + +int +attribute_compat_text_section +__posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise) +{ + return __posix_fadvise64_l64 (fd, offset, len, advise); +} + +versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3); +compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2); +# else +weak_alias (__posix_fadvise64_l64, posix_fadvise64); +# endif +#else +weak_alias (__posix_fadvise64_l64, posix_fadvise64); +strong_alias (__posix_fadvise64_l64, posix_fadvise); +#endif |