Move UseNewThreadPool to NewThreadPool.

Signed-off-by: Michal Zientkiewicz <michalz@nvidia.com>

Author: mzient

dali/pipeline/executor/executor2/exec2.cc

@@ -31,15 +31,6 @@ namespace exec2 {
 
 namespace {
 
-
-bool UseNewThreadPool() {
-  static bool use_new_thread_pool = []() {
-    const char *new_tp = getenv("DALI_USE_NEW_THREAD_POOL");
-    return new_tp && atoi(new_tp);
-  }();
-  return use_new_thread_pool;
-}
-
 void LimitBackendConcurrency(ExecGraph &graph, OpType backend, int max_concurrency = 1) {
   auto sem = std::make_shared<tasking::Semaphore>(max_concurrency);
   for (auto &n : graph.Nodes()) {

dali/pipeline/util/new_thread_pool.cc

@@ -121,4 +121,13 @@ std::vector<std::thread::id> ThreadPoolFacade::GetThreadIds() const {
   return tp_->GetThreadIds();
 }
 
+bool UseNewThreadPool() {
+  static bool use_new_thread_pool = []() {
+    const char *new_tp = getenv("DALI_USE_NEW_THREAD_POOL");
+    return new_tp && atoi(new_tp);
+  }();
+  return use_new_thread_pool;
+}
+
+
 }  // namespace dali

dali/pipeline/util/new_thread_pool.h

@@ -56,6 +56,8 @@ class DLL_PUBLIC ThreadPoolFacade : public ThreadPool {
   std::optional<Job> job_;
 };
 
+DLL_PUBLIC bool UseNewThreadPool();
+
 }  // namespace dali
 
 #endif  // DALI_PIPELINE_UTIL_NEW_THREAD_POOL_H_