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Put malloc_size_of_derive on crates.io, and add a reduced fork of malloc_size_of for WebRender.

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Differential Revision: https://phabricator.services.mozilla.com/D16353
This commit is contained in:
Bobby Holley 2019-01-12 19:21:56 +00:00 • committed by Emilio Cobos Álvarez
parent 5bf0eea1f8
commit f2d6e07aa0
7 changed files with 5 additions and 366 deletions
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3
components/malloc_size_of/lib.rs
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@ -42,6 +42,9 @@
//! fields in structs, because it makes it clear that the Box is being
//! measured as well as the thing it points to. E.g.
//! `<Box<_> as MallocSizeOf>::size_of(field, ops)`.
//!
//! Note: WebRender has a reduced for of this crate, so that we can avoid
//! publishing this crate on crates.io.
extern crate app_units;
#[cfg(feature = "servo")]

15
components/malloc_size_of_derive/Cargo.toml
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@ -1,15 +0,0 @@
[package]
name = "malloc_size_of_derive"
version = "0.0.1"
authors = ["The Servo Project Developers"]
license = "MIT/Apache-2.0"
publish = false
[lib]
path = "lib.rs"
proc-macro = true
[dependencies]
proc-macro2 = "0.4"
syn = { version = "0.15", features = ["full"] }
synstructure = "0.10"

201
components/malloc_size_of_derive/LICENSE-APACHE
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@ -1,201 +0,0 @@
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23
components/malloc_size_of_derive/LICENSE-MIT
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@ -1,23 +0,0 @@
Permission is hereby granted, free of charge, to any
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DEALINGS IN THE SOFTWARE.

125
components/malloc_size_of_derive/lib.rs
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@ -1,125 +0,0 @@
// Copyright 2016-2017 The Servo 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.
//! A crate for deriving the MallocSizeOf trait.
extern crate proc_macro2;
#[macro_use]
extern crate syn;
#[macro_use]
extern crate synstructure;
#[cfg(not(test))]
decl_derive!([MallocSizeOf, attributes(ignore_malloc_size_of)] => malloc_size_of_derive);
fn malloc_size_of_derive(s: synstructure::Structure) -> proc_macro2::TokenStream {
let match_body = s.each(|binding| {
let ignore = binding
.ast()
.attrs
.iter()
.any(|attr| match attr.interpret_meta().unwrap() {
syn::Meta::Word(ref ident) | syn::Meta::List(syn::MetaList { ref ident, .. })
if ident == "ignore_malloc_size_of" =>
{
panic!(
"#[ignore_malloc_size_of] should have an explanation, \
e.g. #[ignore_malloc_size_of = \"because reasons\"]"
);
}
syn::Meta::NameValue(syn::MetaNameValue { ref ident, .. })
if ident == "ignore_malloc_size_of" =>
{
true
},
_ => false,
});
if ignore {
None
} else if let syn::Type::Array(..) = binding.ast().ty {
Some(quote! {
for item in #binding.iter() {
sum += ::malloc_size_of::MallocSizeOf::size_of(item, ops);
}
})
} else {
Some(quote! {
sum += ::malloc_size_of::MallocSizeOf::size_of(#binding, ops);
})
}
});
let ast = s.ast();
let name = &ast.ident;
let (impl_generics, ty_generics, where_clause) = ast.generics.split_for_impl();
let mut where_clause = where_clause.unwrap_or(&parse_quote!(where)).clone();
for param in ast.generics.type_params() {
let ident = &param.ident;
where_clause
.predicates
.push(parse_quote!(#ident: ::malloc_size_of::MallocSizeOf));
}
let tokens = quote! {
impl #impl_generics ::malloc_size_of::MallocSizeOf for #name #ty_generics #where_clause {
#[inline]
#[allow(unused_variables, unused_mut, unreachable_code)]
fn size_of(&self, ops: &mut ::malloc_size_of::MallocSizeOfOps) -> usize {
let mut sum = 0;
match *self {
#match_body
}
sum
}
}
};
tokens
}
#[test]
fn test_struct() {
let source = syn::parse_str(
"struct Foo<T> { bar: Bar, baz: T, #[ignore_malloc_size_of = \"\"] z: Arc<T> }",
)
.unwrap();
let source = synstructure::Structure::new(&source);
let expanded = malloc_size_of_derive(source).to_string();
let mut no_space = expanded.replace(" ", "");
macro_rules! match_count {
($e: expr, $count: expr) => {
assert_eq!(
no_space.matches(&$e.replace(" ", "")).count(),
$count,
"counting occurences of {:?} in {:?} (whitespace-insensitive)",
$e,
expanded
)
};
}
match_count!("struct", 0);
match_count!("ignore_malloc_size_of", 0);
match_count!("impl<T> ::malloc_size_of::MallocSizeOf for Foo<T> where T: ::malloc_size_of::MallocSizeOf {", 1);
match_count!("sum += ::malloc_size_of::MallocSizeOf::size_of(", 2);
let source = syn::parse_str("struct Bar([Baz; 3]);").unwrap();
let source = synstructure::Structure::new(&source);
let expanded = malloc_size_of_derive(source).to_string();
no_space = expanded.replace(" ", "");
match_count!("for item in", 1);
}
#[should_panic(expected = "should have an explanation")]
#[test]
fn test_no_reason() {
let input = syn::parse_str("struct A { #[ignore_malloc_size_of] b: C }").unwrap();
malloc_size_of_derive(synstructure::Structure::new(&input));
}

2
components/style/Cargo.toml
View file

@ -44,7 +44,7 @@ itoa = "0.4"
lazy_static = "1"
log = "0.4"
malloc_size_of = { path = "../malloc_size_of" }
malloc_size_of_derive = { path = "../malloc_size_of_derive" }
malloc_size_of_derive = "0.1"
matches = "0.1"
num_cpus = {version = "1.1.0"}
num-integer = "0.1"

2
components/style_traits/Cargo.toml
View file

@ -19,7 +19,7 @@ cssparser = "0.25"
bitflags = "1.0"
euclid = "0.19"
malloc_size_of = { path = "../malloc_size_of" }
malloc_size_of_derive = { path = "../malloc_size_of_derive" }
malloc_size_of_derive = "0.1"
selectors = { path = "../selectors" }
serde = {version = "1.0", optional = true}
webrender_api = {git = "https://github.com/servo/webrender", optional = true}