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// 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, AsyncCallback, WatcherInterop};
use super::status_to_maybe_uv_error;
pub struct AsyncWatcher(*uvll::uv_async_t);
impl Watcher for AsyncWatcher { }
impl AsyncWatcher {
pub fn new(loop_: &mut Loop, cb: AsyncCallback) -> AsyncWatcher {
unsafe {
let handle = uvll::malloc_handle(uvll::UV_ASYNC);
assert!(handle.is_not_null());
let mut watcher: AsyncWatcher = NativeHandle::from_native_handle(handle);
watcher.install_watcher_data();
let data = watcher.get_watcher_data();
data.async_cb = Some(cb);
assert_eq!(0, uvll::uv_async_init(loop_.native_handle(), handle, async_cb));
return watcher;
}
extern fn async_cb(handle: *uvll::uv_async_t, status: c_int) {
let mut watcher: AsyncWatcher = NativeHandle::from_native_handle(handle);
let status = status_to_maybe_uv_error(status);
let data = watcher.get_watcher_data();
let cb = data.async_cb.get_ref();
(*cb)(watcher, status);
}
}
pub fn send(&mut self) {
unsafe {
let handle = self.native_handle();
uvll::uv_async_send(handle);
}
}
}
impl NativeHandle<*uvll::uv_async_t> for AsyncWatcher {
fn from_native_handle(handle: *uvll::uv_async_t) -> AsyncWatcher {
AsyncWatcher(handle)
}
fn native_handle(&self) -> *uvll::uv_async_t {
match self { &AsyncWatcher(ptr) => ptr }
}
}
#[cfg(test)]
mod test {
use super::*;
use Loop;
use std::unstable::run_in_bare_thread;
use std::rt::thread::Thread;
use std::cell::Cell;
#[test]
fn smoke_test() {
do run_in_bare_thread {
let mut loop_ = Loop::new();
let watcher = AsyncWatcher::new(&mut loop_, |w, _| w.close(||()) );
let watcher_cell = Cell::new(watcher);
let thread = do Thread::start {
let mut watcher = watcher_cell.take();
watcher.send();
};
loop_.run();
loop_.close();
thread.join();
}
}
}
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