axlibc/
io_mpx.rs

1use crate::{ctypes, utils::e};
2
3use core::ffi::c_int;
4
5#[cfg(feature = "select")]
6use arceos_posix_api::sys_select;
7#[cfg(feature = "epoll")]
8use arceos_posix_api::{sys_epoll_create, sys_epoll_ctl, sys_epoll_wait};
9
10/// Creates a new epoll instance.
11///
12/// It returns a file descriptor referring to the new epoll instance.
13#[cfg(feature = "epoll")]
14#[unsafe(no_mangle)]
15pub unsafe extern "C" fn epoll_create(size: c_int) -> c_int {
16    e(sys_epoll_create(size))
17}
18
19/// Control interface for an epoll file descriptor
20#[cfg(feature = "epoll")]
21#[unsafe(no_mangle)]
22pub unsafe extern "C" fn epoll_ctl(
23    epfd: c_int,
24    op: c_int,
25    fd: c_int,
26    event: *mut ctypes::epoll_event,
27) -> c_int {
28    e(sys_epoll_ctl(epfd, op, fd, event))
29}
30
31/// Waits for events on the epoll instance referred to by the file descriptor epfd.
32#[cfg(feature = "epoll")]
33#[unsafe(no_mangle)]
34pub unsafe extern "C" fn epoll_wait(
35    epfd: c_int,
36    events: *mut ctypes::epoll_event,
37    maxevents: c_int,
38    timeout: c_int,
39) -> c_int {
40    e(sys_epoll_wait(epfd, events, maxevents, timeout))
41}
42
43/// Monitor multiple file descriptors, waiting until one or more of the file descriptors become "ready" for some class of I/O operation
44#[cfg(feature = "select")]
45#[unsafe(no_mangle)]
46pub unsafe extern "C" fn select(
47    nfds: c_int,
48    readfds: *mut ctypes::fd_set,
49    writefds: *mut ctypes::fd_set,
50    exceptfds: *mut ctypes::fd_set,
51    timeout: *mut ctypes::timeval,
52) -> c_int {
53    e(sys_select(nfds, readfds, writefds, exceptfds, timeout))
54}