1 files changed, 17 insertions, 0 deletions
diff --git a/third_party/rust/nix/src/sys/eventfd.rs b/third_party/rust/nix/src/sys/eventfd.rs
new file mode 100644
index 0000000000..cd906720cd
--- /dev/null
+++ b/third_party/rust/nix/src/sys/eventfd.rs
@@ -0,0 +1,17 @@
+use crate::errno::Errno;
+use crate::Result;
+use std::os::unix::io::RawFd;
+
+libc_bitflags! {
+    pub struct EfdFlags: libc::c_int {
+        EFD_CLOEXEC; // Since Linux 2.6.27
+        EFD_NONBLOCK; // Since Linux 2.6.27
+        EFD_SEMAPHORE; // Since Linux 2.6.30
+    }
+}
+
+pub fn eventfd(initval: libc::c_uint, flags: EfdFlags) -> Result<RawFd> {
+    let res = unsafe { libc::eventfd(initval, flags.bits()) };
+
+    Errno::result(res).map(|r| r as RawFd)
+}