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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
//! Enum wrappers to be able to select different channel implementations at runtime.
mod ipc;
mod mpsc;
use crate::webgl::WebGLMsg;
use ipc_channel::ipc::IpcSender;
use ipc_channel::router::ROUTER;
use serde::{Deserialize, Serialize};
use servo_config::opts;
use std::fmt;
lazy_static! {
static ref IS_MULTIPROCESS: bool = opts::multiprocess();
}
#[derive(Deserialize, Serialize)]
pub enum WebGLSender<T: Serialize> {
Ipc(ipc::WebGLSender<T>),
Mpsc(mpsc::WebGLSender<T>),
}
impl<T> Clone for WebGLSender<T>
where
T: Serialize,
{
fn clone(&self) -> Self {
match *self {
WebGLSender::Ipc(ref chan) => WebGLSender::Ipc(chan.clone()),
WebGLSender::Mpsc(ref chan) => WebGLSender::Mpsc(chan.clone()),
}
}
}
impl<T: Serialize> fmt::Debug for WebGLSender<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "WebGLSender(..)")
}
}
impl<T: Serialize> WebGLSender<T> {
#[inline]
pub fn send(&self, msg: T) -> WebGLSendResult {
match *self {
WebGLSender::Ipc(ref sender) => sender.send(msg).map_err(|_| ()),
WebGLSender::Mpsc(ref sender) => sender.send(msg).map_err(|_| ()),
}
}
}
pub type WebGLSendResult = Result<(), ()>;
pub enum WebGLReceiver<T>
where
T: for<'de> Deserialize<'de> + Serialize,
{
Ipc(ipc::WebGLReceiver<T>),
Mpsc(mpsc::WebGLReceiver<T>),
}
impl<T> WebGLReceiver<T>
where
T: for<'de> Deserialize<'de> + Serialize,
{
pub fn recv(&self) -> Result<T, ()> {
match *self {
WebGLReceiver::Ipc(ref receiver) => receiver.recv().map_err(|_| ()),
WebGLReceiver::Mpsc(ref receiver) => receiver.recv().map_err(|_| ()),
}
}
pub fn try_recv(&self) -> Result<T, ()> {
match *self {
WebGLReceiver::Ipc(ref receiver) => receiver.try_recv().map_err(|_| ()),
WebGLReceiver::Mpsc(ref receiver) => receiver.try_recv().map_err(|_| ()),
}
}
pub fn into_inner(self) -> crossbeam_channel::Receiver<T>
where
T: Send + 'static,
{
match self {
WebGLReceiver::Ipc(receiver) => {
ROUTER.route_ipc_receiver_to_new_crossbeam_receiver(receiver)
},
WebGLReceiver::Mpsc(receiver) => receiver.into_inner(),
}
}
}
pub fn webgl_channel<T>() -> Result<(WebGLSender<T>, WebGLReceiver<T>), ()>
where
T: for<'de> Deserialize<'de> + Serialize,
{
if *IS_MULTIPROCESS {
ipc::webgl_channel()
.map(|(tx, rx)| (WebGLSender::Ipc(tx), WebGLReceiver::Ipc(rx)))
.map_err(|_| ())
} else {
mpsc::webgl_channel().map(|(tx, rx)| (WebGLSender::Mpsc(tx), WebGLReceiver::Mpsc(rx)))
}
}
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct WebGLChan(pub WebGLSender<WebGLMsg>);
impl WebGLChan {
#[inline]
pub fn send(&self, msg: WebGLMsg) -> WebGLSendResult {
self.0.send(msg)
}
pub fn to_ipc(&self) -> IpcSender<WebGLMsg> {
match self.0 {
WebGLSender::Ipc(ref sender) => sender.clone(),
WebGLSender::Mpsc(ref mpsc_sender) => {
let (sender, receiver) =
ipc_channel::ipc::channel().expect("IPC Channel creation failed");
let mpsc_sender = mpsc_sender.clone();
ipc_channel::router::ROUTER.add_route(
receiver.to_opaque(),
Box::new(move |message| {
if let Ok(message) = message.to() {
let _ = mpsc_sender.send(message);
}
}),
);
sender
},
}
}
}
#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct WebGLPipeline(pub WebGLChan);
impl WebGLPipeline {
pub fn channel(&self) -> WebGLChan {
self.0.clone()
}
}
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