Move all PropertyDeclarationBlock from RwLock<_> to Locked<_>

components/style/gecko/global_style_data.rs

@@ -0,0 +1,50 @@
+/* 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/. */
+
+//! Global style data
+
+use num_cpus;
+use rayon;
+use shared_lock::SharedRwLock;
+use std::cmp;
+use std::env;
+
+/// Global style data
+pub struct GlobalStyleData {
+    /// How many threads parallel styling can use.
+    pub num_threads: usize,
+
+    /// The parallel styling thread pool.
+    pub style_thread_pool: Option<rayon::ThreadPool>,
+
+    /// Shared RWLock for CSSOM objects
+    pub shared_lock: SharedRwLock,
+}
+
+lazy_static! {
+    /// Global style data
+    pub static ref GLOBAL_STYLE_DATA: GlobalStyleData = {
+        let stylo_threads = env::var("STYLO_THREADS")
+            .map(|s| s.parse::<usize>().expect("invalid STYLO_THREADS value"));
+        let num_threads = match stylo_threads {
+            Ok(num) => num,
+            _ => cmp::max(num_cpus::get() * 3 / 4, 1),
+        };
+
+        let pool = if num_threads <= 1 {
+            None
+        } else {
+            let configuration =
+                rayon::Configuration::new().set_num_threads(num_threads);
+            let pool = rayon::ThreadPool::new(configuration).ok();
+            pool
+        };
+
+        GlobalStyleData {
+            num_threads: num_threads,
+            style_thread_pool: pool,
+            shared_lock: SharedRwLock::new(),
+        }
+    };
+}