Add epoll definitions

Author: jackpot51

src/unix/redox/mod.rs

@@ -62,6 +62,12 @@ s! {
         pub dli_saddr: *mut ::c_void,
     }
 
+    pub struct epoll_event {
+        pub events: u32,
+        pub data: u64,
+        _pad: u64,
+    }
+
     pub struct fd_set {
         fds_bits: [::c_ulong; ::FD_SETSIZE / ULONG_SIZE],
     }
@@ -398,6 +404,37 @@ extern {
                            oldset: *mut ::sigset_t) -> ::c_int;
 }
 
+// sys/epoll.h
+pub const EPOLL_CLOEXEC: ::c_int = 0x0100_0000;
+pub const EPOLLIN: ::c_int = 1;
+pub const EPOLLPRI: ::c_int = 0;
+pub const EPOLLOUT: ::c_int = 2;
+pub const EPOLLRDNORM: ::c_int = 0;
+pub const EPOLLNVAL: ::c_int = 0;
+pub const EPOLLRDBAND: ::c_int = 0;
+pub const EPOLLWRNORM: ::c_int = 0;
+pub const EPOLLWRBAND: ::c_int = 0;
+pub const EPOLLMSG: ::c_int = 0;
+pub const EPOLLERR: ::c_int = 0;
+pub const EPOLLHUP: ::c_int = 0;
+pub const EPOLLRDHUP: ::c_int = 0;
+pub const EPOLLEXCLUSIVE: ::c_int = 0;
+pub const EPOLLWAKEUP: ::c_int = 0;
+pub const EPOLLONESHOT: ::c_int = 0;
+pub const EPOLLET: ::c_int = 0;
+extern {
+    pub fn epoll_create(size: ::c_int) -> ::c_int;
+    pub fn epoll_create1(flags: ::c_int) -> ::c_int;
+    pub fn epoll_wait(epfd: ::c_int,
+                      events: *mut ::epoll_event,
+                      maxevents: ::c_int,
+                      timeout: ::c_int) -> ::c_int;
+    pub fn epoll_ctl(epfd: ::c_int,
+                     op: ::c_int,
+                     fd: ::c_int,
+                     event: *mut ::epoll_event) -> ::c_int;
+}
+
 // sys/stat.h
 pub const S_IFMT: ::c_int = 0o0_170_000;
 pub const S_IFDIR: ::c_int = 0o040_000;