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-rw-r--r--components/canvas_traits/webgl_channel/mod.rs87
1 files changed, 87 insertions, 0 deletions
diff --git a/components/canvas_traits/webgl_channel/mod.rs b/components/canvas_traits/webgl_channel/mod.rs
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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 http://mozilla.org/MPL/2.0/. */
+
+//! Enum wrappers to be able to select different channel implementations at runtime.
+
+mod ipc;
+mod mpsc;
+
+use ::webgl::WebGLMsg;
+use serde::{Deserialize, Serialize};
+use servo_config::opts;
+
+lazy_static! {
+ static ref IS_MULTIPROCESS: bool = {
+ opts::multiprocess()
+ };
+}
+
+#[derive(Clone, Deserialize, Serialize)]
+pub enum WebGLSender<T: Serialize> {
+ Ipc(ipc::WebGLSender<T>),
+ Mpsc(mpsc::WebGLSender<T>),
+}
+
+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 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, Deserialize, Serialize)]
+pub struct WebGLChan(pub WebGLSender<WebGLMsg>);
+
+impl WebGLChan {
+ #[inline]
+ pub fn send(&self, msg: WebGLMsg) -> WebGLSendResult {
+ self.0.send(msg)
+ }
+}
+
+#[derive(Clone, Deserialize, Serialize)]
+pub struct WebGLPipeline(pub WebGLChan);
+
+impl WebGLPipeline {
+ pub fn channel(&self) -> WebGLChan {
+ self.0.clone()
+ }
+}