1 files changed, 137 insertions, 0 deletions
diff --git a/src/librustuv/idle.rs b/src/librustuv/idle.rs
new file mode 100644
index 00000000000..4f606b5f01f
--- /dev/null
+++ b/src/librustuv/idle.rs
@@ -0,0 +1,137 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::libc::c_int;
+
+use uvll;
+use super::{Watcher, Loop, NativeHandle, IdleCallback, status_to_maybe_uv_error};
+
+pub struct IdleWatcher(*uvll::uv_idle_t);
+impl Watcher for IdleWatcher { }
+
+impl IdleWatcher {
+    pub fn new(loop_: &mut Loop) -> IdleWatcher {
+        unsafe {
+            let handle = uvll::malloc_handle(uvll::UV_IDLE);
+            assert!(handle.is_not_null());
+            assert_eq!(uvll::idle_init(loop_.native_handle(), handle), 0);
+            let mut watcher: IdleWatcher = NativeHandle::from_native_handle(handle);
+            watcher.install_watcher_data();
+            return watcher
+        }
+    }
+
+    pub fn start(&mut self, cb: IdleCallback) {
+        {
+            let data = self.get_watcher_data();
+            data.idle_cb = Some(cb);
+        }
+
+        unsafe {
+            assert_eq!(uvll::idle_start(self.native_handle(), idle_cb), 0)
+        }
+    }
+
+    pub fn restart(&mut self) {
+        unsafe {
+            assert!(self.get_watcher_data().idle_cb.is_some());
+            assert_eq!(uvll::idle_start(self.native_handle(), idle_cb), 0)
+        }
+    }
+
+    pub fn stop(&mut self) {
+        // NB: Not resetting the Rust idle_cb to None here because `stop` is
+        // likely called from *within* the idle callback, causing a use after
+        // free
+
+        unsafe {
+            assert_eq!(uvll::idle_stop(self.native_handle()), 0);
+        }
+    }
+}
+
+impl NativeHandle<*uvll::uv_idle_t> for IdleWatcher {
+    fn from_native_handle(handle: *uvll::uv_idle_t) -> IdleWatcher {
+        IdleWatcher(handle)
+    }
+    fn native_handle(&self) -> *uvll::uv_idle_t {
+        match self { &IdleWatcher(ptr) => ptr }
+    }
+}
+
+extern fn idle_cb(handle: *uvll::uv_idle_t, status: c_int) {
+    let mut idle_watcher: IdleWatcher = NativeHandle::from_native_handle(handle);
+    let data = idle_watcher.get_watcher_data();
+    let cb: &IdleCallback = data.idle_cb.get_ref();
+    let status = status_to_maybe_uv_error(status);
+    (*cb)(idle_watcher, status);
+}
+
+#[cfg(test)]
+mod test {
+
+    use Loop;
+    use super::*;
+    use std::unstable::run_in_bare_thread;
+
+    #[test]
+    #[ignore(reason = "valgrind - loop destroyed before watcher?")]
+    fn idle_new_then_close() {
+        do run_in_bare_thread {
+            let mut loop_ = Loop::new();
+            let idle_watcher = { IdleWatcher::new(&mut loop_) };
+            idle_watcher.close(||());
+        }
+    }
+
+    #[test]
+    fn idle_smoke_test() {
+        do run_in_bare_thread {
+            let mut loop_ = Loop::new();
+            let mut idle_watcher = { IdleWatcher::new(&mut loop_) };
+            let mut count = 10;
+            let count_ptr: *mut int = &mut count;
+            do idle_watcher.start |idle_watcher, status| {
+                let mut idle_watcher = idle_watcher;
+                assert!(status.is_none());
+                if unsafe { *count_ptr == 10 } {
+                    idle_watcher.stop();
+                    idle_watcher.close(||());
+                } else {
+                    unsafe { *count_ptr = *count_ptr + 1; }
+                }
+            }
+            loop_.run();
+            loop_.close();
+            assert_eq!(count, 10);
+        }
+    }
+
+    #[test]
+    fn idle_start_stop_start() {
+        do run_in_bare_thread {
+            let mut loop_ = Loop::new();
+            let mut idle_watcher = { IdleWatcher::new(&mut loop_) };
+            do idle_watcher.start |idle_watcher, status| {
+                let mut idle_watcher = idle_watcher;
+                assert!(status.is_none());
+                idle_watcher.stop();
+                do idle_watcher.start |idle_watcher, status| {
+                    assert!(status.is_none());
+                    let mut idle_watcher = idle_watcher;
+                    idle_watcher.stop();
+                    idle_watcher.close(||());
+                }
+            }
+            loop_.run();
+            loop_.close();
+        }
+    }
+}