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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/rayon-core/src/broadcast/mod.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/rayon-core/src/broadcast/mod.rs')
-rw-r--r--vendor/rayon-core/src/broadcast/mod.rs150
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diff --git a/vendor/rayon-core/src/broadcast/mod.rs b/vendor/rayon-core/src/broadcast/mod.rs
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--- a/vendor/rayon-core/src/broadcast/mod.rs
+++ /dev/null
@@ -1,150 +0,0 @@
-use crate::job::{ArcJob, StackJob};
-use crate::latch::{CountLatch, LatchRef};
-use crate::registry::{Registry, WorkerThread};
-use std::fmt;
-use std::marker::PhantomData;
-use std::sync::Arc;
-
-mod test;
-
-/// Executes `op` within every thread in the current threadpool. If this is
-/// called from a non-Rayon thread, it will execute in the global threadpool.
-/// Any attempts to use `join`, `scope`, or parallel iterators will then operate
-/// within that threadpool. When the call has completed on each thread, returns
-/// a vector containing all of their return values.
-///
-/// For more information, see the [`ThreadPool::broadcast()`][m] method.
-///
-/// [m]: struct.ThreadPool.html#method.broadcast
-pub fn broadcast<OP, R>(op: OP) -> Vec<R>
-where
- OP: Fn(BroadcastContext<'_>) -> R + Sync,
- R: Send,
-{
- // We assert that current registry has not terminated.
- unsafe { broadcast_in(op, &Registry::current()) }
-}
-
-/// Spawns an asynchronous task on every thread in this thread-pool. This task
-/// will run in the implicit, global scope, which means that it may outlast the
-/// current stack frame -- therefore, it cannot capture any references onto the
-/// stack (you will likely need a `move` closure).
-///
-/// For more information, see the [`ThreadPool::spawn_broadcast()`][m] method.
-///
-/// [m]: struct.ThreadPool.html#method.spawn_broadcast
-pub fn spawn_broadcast<OP>(op: OP)
-where
- OP: Fn(BroadcastContext<'_>) + Send + Sync + 'static,
-{
- // We assert that current registry has not terminated.
- unsafe { spawn_broadcast_in(op, &Registry::current()) }
-}
-
-/// Provides context to a closure called by `broadcast`.
-pub struct BroadcastContext<'a> {
- worker: &'a WorkerThread,
-
- /// Make sure to prevent auto-traits like `Send` and `Sync`.
- _marker: PhantomData<&'a mut dyn Fn()>,
-}
-
-impl<'a> BroadcastContext<'a> {
- pub(super) fn with<R>(f: impl FnOnce(BroadcastContext<'_>) -> R) -> R {
- let worker_thread = WorkerThread::current();
- assert!(!worker_thread.is_null());
- f(BroadcastContext {
- worker: unsafe { &*worker_thread },
- _marker: PhantomData,
- })
- }
-
- /// Our index amongst the broadcast threads (ranges from `0..self.num_threads()`).
- #[inline]
- pub fn index(&self) -> usize {
- self.worker.index()
- }
-
- /// The number of threads receiving the broadcast in the thread pool.
- ///
- /// # Future compatibility note
- ///
- /// Future versions of Rayon might vary the number of threads over time, but
- /// this method will always return the number of threads which are actually
- /// receiving your particular `broadcast` call.
- #[inline]
- pub fn num_threads(&self) -> usize {
- self.worker.registry().num_threads()
- }
-}
-
-impl<'a> fmt::Debug for BroadcastContext<'a> {
- fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
- fmt.debug_struct("BroadcastContext")
- .field("index", &self.index())
- .field("num_threads", &self.num_threads())
- .field("pool_id", &self.worker.registry().id())
- .finish()
- }
-}
-
-/// Execute `op` on every thread in the pool. It will be executed on each
-/// thread when they have nothing else to do locally, before they try to
-/// steal work from other threads. This function will not return until all
-/// threads have completed the `op`.
-///
-/// Unsafe because `registry` must not yet have terminated.
-pub(super) unsafe fn broadcast_in<OP, R>(op: OP, registry: &Arc<Registry>) -> Vec<R>
-where
- OP: Fn(BroadcastContext<'_>) -> R + Sync,
- R: Send,
-{
- let f = move |injected: bool| {
- debug_assert!(injected);
- BroadcastContext::with(&op)
- };
-
- let n_threads = registry.num_threads();
- let current_thread = WorkerThread::current().as_ref();
- let latch = CountLatch::with_count(n_threads, current_thread);
- let jobs: Vec<_> = (0..n_threads)
- .map(|_| StackJob::new(&f, LatchRef::new(&latch)))
- .collect();
- let job_refs = jobs.iter().map(|job| job.as_job_ref());
-
- registry.inject_broadcast(job_refs);
-
- // Wait for all jobs to complete, then collect the results, maybe propagating a panic.
- latch.wait(current_thread);
- jobs.into_iter().map(|job| job.into_result()).collect()
-}
-
-/// Execute `op` on every thread in the pool. It will be executed on each
-/// thread when they have nothing else to do locally, before they try to
-/// steal work from other threads. This function returns immediately after
-/// injecting the jobs.
-///
-/// Unsafe because `registry` must not yet have terminated.
-pub(super) unsafe fn spawn_broadcast_in<OP>(op: OP, registry: &Arc<Registry>)
-where
- OP: Fn(BroadcastContext<'_>) + Send + Sync + 'static,
-{
- let job = ArcJob::new({
- let registry = Arc::clone(registry);
- move || {
- registry.catch_unwind(|| BroadcastContext::with(&op));
- registry.terminate(); // (*) permit registry to terminate now
- }
- });
-
- let n_threads = registry.num_threads();
- let job_refs = (0..n_threads).map(|_| {
- // Ensure that registry cannot terminate until this job has executed
- // on each thread. This ref is decremented at the (*) above.
- registry.increment_terminate_count();
-
- ArcJob::as_static_job_ref(&job)
- });
-
- registry.inject_broadcast(job_refs);
-}