Bind eventfd()

Author: carllerche

src/sys/eventfd.rs

@@ -0,0 +1,29 @@
+use libc::{c_int, c_uint};
+use fcntl::Fd;
+use errno::{SysResult, SysError, from_ffi};
+
+mod ffi {
+    use libc::{c_int, c_uint};
+
+    extern {
+        pub fn eventfd(initval: c_uint, flags: c_int) -> c_int;
+    }
+}
+
+bitflags!(
+    flags EventFdFlag: c_int {
+        static EFD_CLOEXEC   = 0o2000000, // Since Linux 2.6.27
+        static EFD_NONBLOCK  = 0o0004000, // Since Linux 2.6.27
+        static EFD_SEMAPHORE = 0o0000001, // Since Linux 2.6.30
+    }
+)
+
+pub fn eventfd(initval: uint, flags: EventFdFlag) -> SysResult<Fd> {
+    let res = unsafe { ffi::eventfd(initval as c_uint, flags.bits()) };
+
+    if res < 0 {
+        return Err(SysError::last());
+    }
+
+    Ok(res)
+}

src/sys/mod.rs

@@ -6,6 +6,9 @@ pub mod epoll;
 #[cfg(target_os = "ios")]
 pub mod event;
 
+#[cfg(target_os = "linux")]
+pub mod eventfd;
+
 #[cfg(target_os = "linux")]
 #[cfg(target_os = "macos")]
 #[cfg(target_os = "ios")]