use std::fs::File;
use std::io;
// A stable alternative to
https://doc.rust-lang.org/stable/std/primitive.never.html
enum Never {}
pub struct MmapInner {
never: Never,
}
impl MmapInner {
fn new() -> io::Result<MmapInner> {
Err(io::Error::new(
io::ErrorKind::Other,
"platform not supported",
))
}
pub fn map(_: usize, _: &File, _: u64, _: bool) -> io::Result<MmapInner> {
MmapInner::new()
}
pub fn map_exec(_: usize, _: &File, _: u64, _: bool) -> io::Result<MmapInner> {
MmapInner::new()
}
pub fn map_mut(_: usize, _: &File, _: u64, _: bool) -> io::Result<MmapInner> {
MmapInner::new()
}
pub fn map_copy(_: usize, _: &File, _: u64, _: bool) -> io::Result<MmapInner> {
MmapInner::new()
}
pub fn map_copy_read_only(_: usize, _: &File, _: u64, _: bool) -> io::Result<MmapInner> {
MmapInner::new()
}
pub fn map_anon(_: usize, _: bool, _: bool, _: Option<u8>) -> io::Result<MmapInner> {
MmapInner::new()
}
pub fn flush(&self, _: usize, _: usize) -> io::Result<()> {
match self.never {}
}
pub fn flush_async(&self, _: usize, _: usize) -> io::Result<()> {
match self.never {}
}
pub fn make_read_only(&mut self) -> io::Result<()> {
match self.never {}
}
pub fn make_exec(&mut self) -> io::Result<()> {
match self.never {}
}
pub fn make_mut(&mut self) -> io::Result<()> {
match self.never {}
}
#[inline]
pub fn ptr(&self) -> *const u8 {
match self.never {}
}
#[inline]
pub fn mut_ptr(&mut self) -> *mut u8 {
match self.never {}
}
#[inline]
pub fn len(&self) -> usize {
match self.never {}
}
}
pub fn file_len(file: &File) -> io::Result<u64> {
Ok(file.metadata()?.len())
}
