/* vi: set sw=4 ts=4: */ /* * posix_fadvise() for uClibc * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html * * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ /* need to hide the 64bit prototype or the strong_alias() * will fail when __NR_fadvise64_64 doesnt exist */ #define posix_fadvise64 __hideposix_fadvise64 #include <sys/syscall.h> #include <fcntl.h> #undef posix_fadvise64 #ifdef __NR_fadvise64 #define __NR_posix_fadvise __NR_fadvise64 /* get rid of following conditional when all supported arches are having INTERNAL_SYSCALL defined */ #ifdef INTERNAL_SYSCALL int posix_fadvise(int fd, off_t offset, off_t len, int advice) { INTERNAL_SYSCALL_DECL(err); int ret = (int) (INTERNAL_SYSCALL(posix_fadvise, err, 5, fd, __LONG_LONG_PAIR (offset >> 31, offset), len, advice)); if (INTERNAL_SYSCALL_ERROR_P (ret, err)) return INTERNAL_SYSCALL_ERRNO (ret, err); return 0; } #else static __inline__ int syscall_posix_fadvise(int fd, off_t offset1, off_t offset2, off_t len, int advice); #define __NR_syscall_posix_fadvise __NR_fadvise64 _syscall5(int, syscall_posix_fadvise, int, fd, off_t, offset1, off_t, offset2, off_t, len, int, advice) int posix_fadvise(int fd, off_t offset, off_t len, int advice) { int ret = syscall_posix_fadvise(fd, __LONG_LONG_PAIR (offset >> 31, offset), len, advice); if (ret == -1) return errno; return ret; } #endif #if defined __UCLIBC_HAS_LFS__ && (!defined __NR_fadvise64_64 || !defined _syscall6) extern __typeof(posix_fadvise) posix_fadvise64; strong_alias(posix_fadvise,posix_fadvise64) #endif #else int posix_fadvise(int fd attribute_unused, off_t offset attribute_unused, off_t len attribute_unused, int advice attribute_unused) { #warning This is not correct as far as SUSv3 is concerned. return ENOSYS; } #endif