Auto merge of #453 - nix-rust:asomers-kevent, r=posborne

Asomers kevent

This is a rebase of @asomers work on master to resolve a merge conflict so we can get things merged up.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/sys/event.rs b/src/sys/event.rs
index d44963db..68528c9e 100644
--- a/src/sys/event.rs
+++ b/src/sys/event.rs
@@ -191,6 +191,13 @@ pub fn kqueue() -> Result<RawFd> {
     Errno::result(res)
 }
 
+
+// KEvent can't derive Send because on some operating systems, udata is defined
+// as a void*.  However, KEvent's public API always treats udata as a uintptr_t,
+// which is safe to Send.
+unsafe impl Send for KEvent {
+}
+
 impl KEvent {
     pub fn new(ident: uintptr_t, filter: EventFilter, flags: EventFlag,
                fflags:FilterFlag, data: intptr_t, udata: uintptr_t) -> KEvent {