Sha256: 7d3d7bc6e5d34e3ecb1fe8b30d36bed404b4b9cd79d3b771c91215abfabb9ad1
Contents?: true
Size: 1.03 KB
Versions: 31
Compression:
Stored size: 1.03 KB
Contents
use super::mystd::fs::File;
use super::mystd::os::unix::prelude::*;
use core::ops::Deref;
use core::ptr;
use core::slice;
#[cfg(not(all(target_os = "linux", target_env = "gnu")))]
use libc::mmap as mmap64;
#[cfg(all(target_os = "linux", target_env = "gnu"))]
use libc::mmap64;
pub struct Mmap {
ptr: *mut libc::c_void,
len: usize,
}
impl Mmap {
pub unsafe fn map(file: &File, len: usize) -> Option<Mmap> {
let ptr = mmap64(
ptr::null_mut(),
len,
libc::PROT_READ,
libc::MAP_PRIVATE,
file.as_raw_fd(),
0,
);
if ptr == libc::MAP_FAILED {
return None;
}
Some(Mmap { ptr, len })
}
}
impl Deref for Mmap {
type Target = [u8];
fn deref(&self) -> &[u8] {
unsafe { slice::from_raw_parts(self.ptr as *const u8, self.len) }
}
}
impl Drop for Mmap {
fn drop(&mut self) {
unsafe {
let r = libc::munmap(self.ptr, self.len);
debug_assert_eq!(r, 0);
}
}
}
Version data entries
31 entries across 31 versions & 1 rubygems