Update volatile variables to C++20

This gets rid of the -Wdeprecated-volatile warnings. More info in the
proposal: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1152r4.html

The bool ones weren't causing warnings but we might as well clean
them up in this CL too.

Bug: 368241186
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Change-Id: Iddb60c2fe600ef27f29c943b3b669171e7f9aed3

1 files changed, 3 insertions, 3 deletions

diff --git a/runtime/thread_pool.h b/runtime/thread_pool.h
index 6d176546c3..96317ad13d 100644
--- a/runtime/thread_pool.h
+++ b/runtime/thread_pool.h
@@ -192,10 +192,10 @@ class AbstractThreadPool {
   Mutex task_queue_lock_;
   ConditionVariable task_queue_condition_ GUARDED_BY(task_queue_lock_);
   ConditionVariable completion_condition_ GUARDED_BY(task_queue_lock_);
-  volatile bool started_ GUARDED_BY(task_queue_lock_);
-  volatile bool shutting_down_ GUARDED_BY(task_queue_lock_);
+  bool started_ GUARDED_BY(task_queue_lock_);
+  bool shutting_down_ GUARDED_BY(task_queue_lock_);
   // How many worker threads are waiting on the condition.
-  volatile size_t waiting_count_ GUARDED_BY(task_queue_lock_);
+  size_t waiting_count_ GUARDED_BY(task_queue_lock_);
   std::vector<ThreadPoolWorker*> threads_;
   // Work balance detection.
   uint64_t start_time_ GUARDED_BY(task_queue_lock_);