Convert PalEpoll to Rusty error handling.

src/platform/linux/epoll.rs

@@ -1,34 +1,38 @@
-use super::{
-    super::{types::*, PalEpoll},
-    e, Sys,
+use super::{e_raw, Sys};
+use crate::{
+    error::Result,
+    header::{signal::sigset_t, sys_epoll::epoll_event},
+    platform::{types::*, PalEpoll},
 };
-use crate::header::{signal::sigset_t, sys_epoll::epoll_event};
 
 impl PalEpoll for Sys {
-    fn epoll_create1(flags: c_int) -> c_int {
-        unsafe { e(syscall!(EPOLL_CREATE1, flags)) as c_int }
+    fn epoll_create1(flags: c_int) -> Result<c_int> {
+        Ok(unsafe { e_raw(syscall!(EPOLL_CREATE1, flags))? as c_int })
     }
 
-    fn epoll_ctl(epfd: c_int, op: c_int, fd: c_int, event: *mut epoll_event) -> c_int {
-        unsafe { e(syscall!(EPOLL_CTL, epfd, op, fd, event)) as c_int }
+    unsafe fn epoll_ctl(epfd: c_int, op: c_int, fd: c_int, event: *mut epoll_event) -> Result<()> {
+        unsafe {
+            e_raw(syscall!(EPOLL_CTL, epfd, op, fd, event))?;
+        }
+        Ok(())
     }
 
-    fn epoll_pwait(
+    unsafe fn epoll_pwait(
         epfd: c_int,
         events: *mut epoll_event,
         maxevents: c_int,
         timeout: c_int,
         sigmask: *const sigset_t,
-    ) -> c_int {
+    ) -> Result<usize> {
         unsafe {
-            e(syscall!(
+            e_raw(syscall!(
                 EPOLL_PWAIT,
                 epfd,
                 events,
                 maxevents,
                 timeout,
                 sigmask
-            )) as c_int
+            ))
         }
     }
 }