/* Provide kernel hint to read ahead. Copyright (C) 2002, 2003, 2004 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 <sys/syscall.h> #if defined __NR_readahead && defined __UCLIBC_HAS_LFS__ && defined __USE_GNU # include <fcntl.h> # include <bits/wordsize.h> # define __NR___readahead __NR_readahead # if __WORDSIZE == 64 static __inline__ _syscall3(ssize_t, __readahead, int, fd, off_t, offset, size_t, count) ssize_t readahead(int fd, off_t offset, size_t count) { return __readahead(fd, offset, count); } # else static __inline__ _syscall4(ssize_t, __readahead, int, fd, off_t, high_offset, off_t, low_offset, size_t, count) ssize_t readahead(int fd, off64_t offset, size_t count) { return __readahead(fd, (off_t) (offset >> 32), (off_t) (offset & 0xffffffff), count); } # endif #endif