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https://github.com/servo/servo.git
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4506f0d30c
Servo currently uses `heapsize`, but Stylo/Gecko use `malloc_size_of`. `malloc_size_of` is better -- it handles various cases that `heapsize` does not -- so this patch changes Servo to use `malloc_size_of`. This patch makes the following changes to the `malloc_size_of` crate. - Adds `MallocSizeOf` trait implementations for numerous types, some built-in (e.g. `VecDeque`), some external and Servo-only (e.g. `string_cache`). - Makes `enclosing_size_of_op` optional, because vanilla jemalloc doesn't support that operation. - For `HashSet`/`HashMap`, falls back to a computed estimate when `enclosing_size_of_op` isn't available. - Adds an extern "C" `malloc_size_of` function that does the actual heap measurement; this is based on the same functions from the `heapsize` crate. This patch makes the following changes elsewhere. - Converts all the uses of `heapsize` to instead use `malloc_size_of`. - Disables the "heapsize"/"heap_size" feature for the external crates that provide it. - Removes the `HeapSizeOf` implementation from `hashglobe`. - Adds `ignore` annotations to a few `Rc`/`Arc`, because `malloc_size_of` doesn't derive those types, unlike `heapsize`.
91 lines
2.8 KiB
Rust
91 lines
2.8 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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use dom::bindings::nonnull::NonNullJSObjectPtr;
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use dom::bindings::reflector::DomObject;
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use dom::bindings::root::{DomRoot, MutNullableDom};
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use dom::bindings::trace::JSTraceable;
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use dom::webglrenderingcontext::WebGLRenderingContext;
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use malloc_size_of::MallocSizeOf;
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use std::any::Any;
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use super::{WebGLExtension, WebGLExtensions};
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/// Trait used internally by WebGLExtensions to store and
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/// handle the different WebGL extensions in a common list.
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pub trait WebGLExtensionWrapper: JSTraceable + MallocSizeOf {
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fn instance_or_init(&self,
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ctx: &WebGLRenderingContext,
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ext: &WebGLExtensions)
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-> NonNullJSObjectPtr;
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fn is_supported(&self, &WebGLExtensions) -> bool;
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fn is_enabled(&self) -> bool;
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fn enable(&self, ext: &WebGLExtensions);
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fn name(&self) -> &'static str;
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fn as_any(&self) -> &Any;
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}
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#[must_root]
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#[derive(JSTraceable, MallocSizeOf)]
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pub struct TypedWebGLExtensionWrapper<T: WebGLExtension> {
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extension: MutNullableDom<T::Extension>
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}
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/// Typed WebGL Extension implementation.
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/// Exposes the exact MutNullableDom<DOMObject> type defined by the extension.
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impl<T: WebGLExtension> TypedWebGLExtensionWrapper<T> {
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pub fn new() -> TypedWebGLExtensionWrapper<T> {
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TypedWebGLExtensionWrapper {
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extension: MutNullableDom::new(None)
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}
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}
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}
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impl<T> WebGLExtensionWrapper for TypedWebGLExtensionWrapper<T>
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where T: WebGLExtension + JSTraceable + MallocSizeOf + 'static {
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#[allow(unsafe_code)]
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fn instance_or_init(&self,
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ctx: &WebGLRenderingContext,
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ext: &WebGLExtensions)
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-> NonNullJSObjectPtr {
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let mut enabled = true;
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let extension = self.extension.or_init(|| {
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enabled = false;
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T::new(ctx)
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});
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if !enabled {
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self.enable(ext);
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}
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unsafe {
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NonNullJSObjectPtr::new_unchecked(extension.reflector().get_jsobject().get())
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}
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}
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fn is_supported(&self, ext: &WebGLExtensions) -> bool {
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self.is_enabled() || T::is_supported(ext)
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}
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fn is_enabled(&self) -> bool {
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self.extension.get().is_some()
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}
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fn enable(&self, ext: &WebGLExtensions) {
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T::enable(ext);
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}
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fn name(&self) -> &'static str {
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T::name()
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}
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fn as_any<'a>(&'a self) -> &'a Any {
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self
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}
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}
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impl<T> TypedWebGLExtensionWrapper<T>
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where T: WebGLExtension + JSTraceable + MallocSizeOf + 'static
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{
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pub fn dom_object(&self) -> Option<DomRoot<T::Extension>> {
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self.extension.get()
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}
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}
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