Merge pull request #9 from cuviper/rustc-crossbeam

Update crossbeam and release 0.3.2

Author: cuviper

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "rustc-rayon"
 # Reminder to update html_rool_url in lib.rs when updating version
-version = "0.3.1"
+version = "0.3.2"
 authors = ["Niko Matsakis <[email protected]>",
            "Josh Stone <[email protected]>"]
 description = "Simple work-stealing parallelism for Rust - fork for rustc"
@@ -20,7 +20,7 @@ exclude = ["ci"]
 
 [dependencies]
 rayon-core = { version = "0.3", path = "rayon-core", package = "rustc-rayon-core" }
-crossbeam-deque = "0.7.2"
+crossbeam-deque = "0.8.0"
 
 # This is a public dependency!
 [dependencies.either]

rayon-core/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rustc-rayon-core"
-version = "0.3.1" # reminder to update html_root_url attribute
+version = "0.3.2" # reminder to update html_root_url attribute
 authors = ["Niko Matsakis <[email protected]>",
            "Josh Stone <[email protected]>"]
 description = "Core APIs for Rayon - fork for rustc"
@@ -17,9 +17,8 @@ categories = ["concurrency"]
 [dependencies]
 num_cpus = "1.2"
 lazy_static = "1"
-crossbeam-deque = "0.7.2"
-crossbeam-queue = "0.2"
-crossbeam-utils = "0.7"
+crossbeam-deque = "0.8.0"
+crossbeam-utils = "0.8.0"
 
 [dev-dependencies]
 rand = "0.7"

rayon-core/src/job.rs

@@ -1,7 +1,7 @@
 use crate::latch::Latch;
 use crate::tlv;
 use crate::unwind;
-use crossbeam_queue::SegQueue;
+use crossbeam_deque::{Injector, Steal};
 use std::any::Any;
 use std::cell::UnsafeCell;
 use std::mem;
@@ -191,13 +191,13 @@ impl<T> JobResult<T> {
 
 /// Indirect queue to provide FIFO job priority.
 pub(super) struct JobFifo {
-    inner: SegQueue<JobRef>,
+    inner: Injector<JobRef>,
 }
 
 impl JobFifo {
     pub(super) fn new() -> Self {
         JobFifo {
-            inner: SegQueue::new(),
+            inner: Injector::new(),
         }
     }
 
@@ -213,6 +213,12 @@ impl JobFifo {
 impl Job for JobFifo {
     unsafe fn execute(this: *const Self) {
         // We "execute" a queue by executing its first job, FIFO.
-        (*this).inner.pop().expect("job in fifo queue").execute()
+        loop {
+            match (*this).inner.steal() {
+                Steal::Success(job_ref) => break job_ref.execute(),
+                Steal::Empty => panic!("FIFO is empty"),
+                Steal::Retry => {}
+            }
+        }
     }
 }

rayon-core/src/registry.rs

@@ -8,8 +8,7 @@ use crate::{
     AcquireThreadHandler, DeadlockHandler, ErrorKind, ExitHandler, PanicHandler,
     ReleaseThreadHandler, StartHandler, ThreadPoolBuildError, ThreadPoolBuilder,
 };
-use crossbeam_deque::{Steal, Stealer, Worker};
-use crossbeam_queue::SegQueue;
+use crossbeam_deque::{Injector, Steal, Stealer, Worker};
 use std::any::Any;
 use std::cell::Cell;
 use std::collections::hash_map::DefaultHasher;
@@ -135,7 +134,7 @@ where
 pub struct Registry {
     thread_infos: Vec<ThreadInfo>,
     sleep: Sleep,
-    injected_jobs: SegQueue<JobRef>,
+    injected_jobs: Injector<JobRef>,
     panic_handler: Option<Box<PanicHandler>>,
     pub(crate) deadlock_handler: Option<Box<DeadlockHandler>>,
     start_handler: Option<Box<StartHandler>>,
@@ -240,7 +239,7 @@ impl Registry {
         let registry = Arc::new(Registry {
             thread_infos: stealers.into_iter().map(ThreadInfo::new).collect(),
             sleep: Sleep::new(n_threads),
-            injected_jobs: SegQueue::new(),
+            injected_jobs: Injector::new(),
             terminate_latch: CountLatch::new(),
             panic_handler: builder.take_panic_handler(),
             deadlock_handler: builder.take_deadlock_handler(),
@@ -415,13 +414,18 @@ impl Registry {
     }
 
     fn pop_injected_job(&self, worker_index: usize) -> Option<JobRef> {
-        let job = self.injected_jobs.pop().ok();
-        if job.is_some() {
-            log!(UninjectedWork {
-                worker: worker_index
-            });
+        loop {
+            match self.injected_jobs.steal() {
+                Steal::Success(job) => {
+                    log!(UninjectedWork {
+                        worker: worker_index
+                    });
+                    return Some(job);
+                }
+                Steal::Empty => return None,
+                Steal::Retry => {}
+            }
         }
-        job
     }
 
     /// If already in a worker-thread of this registry, just execute `op`.