Bind eventfd()

1 files changed, 29 insertions, 0 deletions

diff --git a/src/sys/eventfd.rs b/src/sys/eventfd.rs
new file mode 100644
index 00000000..178cd277
--- /dev/null
+++ b/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)
+}