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use fortanix_sgx_abi::Fd;
use super::abi::usercalls;
use crate::io::{self, IoSlice, IoSliceMut};
use crate::mem;
use crate::sys::{AsInner, FromInner, IntoInner};
#[derive(Debug)]
pub struct FileDesc {
fd: Fd,
}
impl FileDesc {
pub fn new(fd: Fd) -> FileDesc {
FileDesc { fd: fd }
}
pub fn raw(&self) -> Fd {
self.fd
}
/// Extracts the actual file descriptor without closing it.
pub fn into_raw(self) -> Fd {
let fd = self.fd;
mem::forget(self);
fd
}
pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
usercalls::read(self.fd, &mut [IoSliceMut::new(buf)])
}
pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
usercalls::read(self.fd, bufs)
}
#[inline]
pub fn is_read_vectored(&self) -> bool {
true
}
pub fn write(&self, buf: &[u8]) -> io::Result<usize> {
usercalls::write(self.fd, &[IoSlice::new(buf)])
}
pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
usercalls::write(self.fd, bufs)
}
#[inline]
pub fn is_write_vectored(&self) -> bool {
true
}
pub fn flush(&self) -> io::Result<()> {
usercalls::flush(self.fd)
}
}
impl AsInner<Fd> for FileDesc {
fn as_inner(&self) -> &Fd {
&self.fd
}
}
impl IntoInner<Fd> for FileDesc {
fn into_inner(self) -> Fd {
let fd = self.fd;
mem::forget(self);
fd
}
}
impl FromInner<Fd> for FileDesc {
fn from_inner(fd: Fd) -> FileDesc {
FileDesc { fd }
}
}
impl Drop for FileDesc {
fn drop(&mut self) {
usercalls::close(self.fd)
}
}
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