relibc/src/header/stdio/default.rs

use super::{constants, Buffer, BUFSIZ, FILE, UNGET};
use core::cell::UnsafeCell;
use core::ptr;
use core::sync::atomic::AtomicBool;

use fs::File;
use io::LineWriter;
use platform::types::*;

pub struct GlobalFile(UnsafeCell<FILE>);
impl GlobalFile {
    fn new(file: c_int, flags: c_int) -> Self {
        let file = File::new(file);
        let writer = LineWriter::new(unsafe { file.get_ref() });
        GlobalFile(UnsafeCell::new(FILE {
            lock: AtomicBool::new(false),

            file,
            flags: constants::F_PERM | flags,
            read_buf: Buffer::Owned(vec![0; BUFSIZ as usize]),
            read_pos: 0,
            read_size: 0,
            unget: None,
            writer
        }))
    }
    pub fn get(&self) -> *mut FILE {
        self.0.get()
    }
}
// statics need to be Sync
unsafe impl Sync for GlobalFile {}

lazy_static! {
    #[allow(non_upper_case_globals)]
    pub static ref default_stdin: GlobalFile = GlobalFile::new(0, constants::F_NOWR);

    #[allow(non_upper_case_globals)]
    pub static ref default_stdout: GlobalFile = GlobalFile::new(1, constants::F_NORD);

    #[allow(non_upper_case_globals)]
    pub static ref default_stderr: GlobalFile = GlobalFile::new(2, constants::F_NORD);
}

#[no_mangle]
pub static mut stdin: *mut FILE = ptr::null_mut();
#[no_mangle]
pub static mut stdout: *mut FILE = ptr::null_mut();
#[no_mangle]
pub static mut stderr: *mut FILE = ptr::null_mut();