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c0b397322f
It is possible for a PaintTask to start exiting soon after sending new buffers to the compositor. In that case, the compositor should return the now unnecessary buffers to the PaintTask so that it can properly free them. To accomplish this, the compositor now keeps a hash map of paint task channels per pipeline id. When a PaintTask exists, the constellation informs the compositor that it can forget about it. Additionally, the PaintTask should not wait for any buffers when the engine is doing a complete shutdown. In that case, the compositor is already halted and has simply let all buffers leak. We pipe through the shutdown type when destroying the pipeline to make this decision. Fixes #2641.
56 lines
2 KiB
Rust
56 lines
2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#![comment = "The Servo Parallel Browser Project"]
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#![license = "MPL"]
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#![deny(unused_imports)]
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#![deny(unused_variables)]
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extern crate gfx;
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extern crate script_traits;
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extern crate "msg" as servo_msg;
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extern crate "net" as servo_net;
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extern crate "util" as servo_util;
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// This module contains traits in layout used generically
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// in the rest of Servo.
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// The traits are here instead of in layout so
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// that these modules won't have to depend on layout.
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use gfx::font_cache_task::FontCacheTask;
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use gfx::paint_task::PaintChan;
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use servo_msg::constellation_msg::{ConstellationChan, Failure, PipelineId, PipelineExitType};
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use servo_net::image_cache_task::ImageCacheTask;
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use servo_net::resource_task::ResourceTask;
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use servo_util::time::TimeProfilerChan;
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use script_traits::{ScriptControlChan, OpaqueScriptLayoutChannel};
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use std::comm::Sender;
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/// Messages sent to the layout task from the constellation
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pub enum LayoutControlMsg {
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ExitNowMsg(PipelineExitType),
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}
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/// A channel wrapper for constellation messages
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pub struct LayoutControlChan(pub Sender<LayoutControlMsg>);
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// A static method creating a layout task
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// Here to remove the compositor -> layout dependency
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pub trait LayoutTaskFactory {
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// FIXME: use a proper static method
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fn create(_phantom: Option<&mut Self>,
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id: PipelineId,
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chan: OpaqueScriptLayoutChannel,
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pipeline_port: Receiver<LayoutControlMsg>,
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constellation_chan: ConstellationChan,
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failure_msg: Failure,
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script_chan: ScriptControlChan,
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paint_chan: PaintChan,
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resource_task: ResourceTask,
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img_cache_task: ImageCacheTask,
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font_cache_task: FontCacheTask,
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time_profiler_chan: TimeProfilerChan,
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shutdown_chan: Sender<()>);
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}
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