func Fadvise(fd uintptr, off int64, size int64, advise int) (err error) {
var errno int
if errno = int(C.posix_fadvise(C.int(fd), C.__off_t(off), C.__off_t(size), C.int(advise))); errno != 0 {
err = syscall.Errno(errno)
}
return
}
func (a *InoAttr) toCStat(o *C.struct_stat, timeout *C.double) {
o.st_ino = C.__ino_t(a.Ino)
o.st_mode = C.__mode_t(a.Mode)
o.st_nlink = C.__nlink_t(a.Nlink)
o.st_size = C.__off_t(a.Size)
if a.Uid != nil {
o.st_uid = C.__uid_t(*a.Uid)
}
if a.Gid != nil {
o.st_gid = C.__gid_t(*a.Gid)
}
toCTime(&o.st_ctim, a.Ctim)
toCTime(&o.st_mtim, a.Mtim)
toCTime(&o.st_atim, a.Atim)
if timeout != nil {
(*timeout) = C.double(a.Timeout)
}
}
func DropBufferCache(fd int, length int64) {
C.posix_fadvise(C.int(fd), C.__off_t(0), C.__off_t(length), C.int(4))
}