================
@@ -92,30 +104,32 @@ class ThreadPool {
&Group);
}
- /// Blocking wait for all the threads to complete and the queue to be empty.
- /// It is an error to try to add new tasks while blocking on this call.
- /// Calling wait() from a task would deadlock waiting for itself.
- void wait();
+private:
+ /// Asynchronous submission of a task to the pool. The returned future can be
+ /// used to wait for the task to finish and is *non-blocking* on destruction.
+ template <typename ResTy>
+ std::shared_future<ResTy> asyncImpl(std::function<ResTy()> Task,
+ ThreadPoolTaskGroup *Group) {
- /// Blocking wait for only all the threads in the given group to complete.
- /// It is possible to wait even inside a task, but waiting (directly or
- /// indirectly) on itself will deadlock. If called from a task running on a
- /// worker thread, the call may process pending tasks while waiting in order
- /// not to waste the thread.
- void wait(ThreadPoolTaskGroup &Group);
+#if LLVM_ENABLE_THREADS
+ /// Wrap the Task in a std::function<void()> that sets the result of the
+ /// corresponding future.
+ auto R = createTaskAndFuture(Task);
- // Returns the maximum number of worker threads in the pool, not the current
- // number of threads!
- unsigned getMaxConcurrency() const { return MaxThreadCount; }
+ asyncEnqueue(std::move(R.first), Group);
+ return R.second.share();
- // TODO: misleading legacy name warning!
- LLVM_DEPRECATED("Use getMaxConcurrency instead", "getMaxConcurrency")
- unsigned getThreadCount() const { return MaxThreadCount; }
+#else // LLVM_ENABLE_THREADS Disabled
- /// Returns true if the current thread is a worker thread of this thread
pool.
- bool isWorkerThread() const;
+ // Get a Future with launch::deferred execution using std::async
----------------
joker-eph wrote:
I removed this now
https://github.com/llvm/llvm-project/pull/82094
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